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Posted to commits@tomee.apache.org by rm...@apache.org on 2016/06/07 15:17:50 UTC

[1/2] tomee git commit: TOMEE-1832 avoid useless locking in dbcp2 + TOMEE-1833 ExceptionSelector to activate or not failover

Repository: tomee
Updated Branches:
  refs/heads/master 28a95b71c -> 0175ecd2e


http://git-wip-us.apache.org/repos/asf/tomee/blob/0175ecd2/container/openejb-core/src/test/java/org/apache/openejb/resource/jdbc/FailOverRouterExceptionSelectorTest.java
----------------------------------------------------------------------
diff --git a/container/openejb-core/src/test/java/org/apache/openejb/resource/jdbc/FailOverRouterExceptionSelectorTest.java b/container/openejb-core/src/test/java/org/apache/openejb/resource/jdbc/FailOverRouterExceptionSelectorTest.java
new file mode 100644
index 0000000..266ad47
--- /dev/null
+++ b/container/openejb-core/src/test/java/org/apache/openejb/resource/jdbc/FailOverRouterExceptionSelectorTest.java
@@ -0,0 +1,2198 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.openejb.resource.jdbc;
+
+import org.apache.openejb.junit.ApplicationComposer;
+import org.apache.openejb.resource.jdbc.router.FailOverRouter;
+import org.apache.openejb.testing.Classes;
+import org.apache.openejb.testing.Configuration;
+import org.apache.openejb.testng.PropertiesBuilder;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import javax.annotation.Resource;
+import javax.sql.DataSource;
+import java.io.InputStream;
+import java.io.Reader;
+import java.math.BigDecimal;
+import java.net.URL;
+import java.sql.Array;
+import java.sql.Blob;
+import java.sql.CallableStatement;
+import java.sql.Clob;
+import java.sql.Connection;
+import java.sql.DatabaseMetaData;
+import java.sql.Date;
+import java.sql.Driver;
+import java.sql.DriverPropertyInfo;
+import java.sql.NClob;
+import java.sql.ParameterMetaData;
+import java.sql.PreparedStatement;
+import java.sql.Ref;
+import java.sql.ResultSet;
+import java.sql.ResultSetMetaData;
+import java.sql.RowId;
+import java.sql.SQLClientInfoException;
+import java.sql.SQLException;
+import java.sql.SQLFeatureNotSupportedException;
+import java.sql.SQLWarning;
+import java.sql.SQLXML;
+import java.sql.Savepoint;
+import java.sql.Statement;
+import java.sql.Struct;
+import java.sql.Time;
+import java.sql.Timestamp;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Collection;
+import java.util.Map;
+import java.util.Properties;
+import java.util.concurrent.CopyOnWriteArraySet;
+import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.logging.Logger;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+@Classes
+@RunWith(ApplicationComposer.class)
+public class FailOverRouterExceptionSelectorTest {
+    @Resource(name = "routedDs")
+    private DataSource failover;
+
+    @Resource(name = "router")
+    private FailOverRouter router;
+
+    @Resource(name = "errorHandler")
+    private SimpleHandler handler;
+
+    @Test
+    public void test() throws SQLException {
+        { // all is fine
+            ControllableDriver.actives.add("1");
+            ControllableDriver.actives.add("2");
+            try (final Connection c = failover.getConnection()) {
+                c.createStatement();
+            }
+            assertEquals(0, handler.errors.size());
+        }
+        { // failover "normal"
+            ControllableDriver.actives.remove("1");
+            SimpleSelector.failoverOnError = true;
+            try (final Connection c = failover.getConnection()) {
+                c.createStatement();
+            }
+
+            assertEquals(1, handler.errors.size());
+            final Map<String, Throwable> errors = handler.errors.iterator().next();
+            assertTrue(errors.containsKey("delegate1"));
+            assertTrue(SQLException.class.isInstance(errors.get("delegate1")));
+            assertEquals("failed", errors.get("delegate1").getMessage());
+        }
+        handler.errors.clear();
+        { // failover "skipped"
+            ControllableDriver.actives.remove("2");
+            ControllableDriver.actives.add("1");
+            SimpleSelector.failoverOnError = false;
+            try {
+                failover.getConnection().close();
+                fail("should have failed");
+            } catch (final SQLException sqle) {
+                // expected
+            }
+
+            assertEquals(0, handler.errors.size());
+        }
+        { // back to "normal"
+            ControllableDriver.actives.remove("2");
+            ControllableDriver.actives.add("1");
+            SimpleSelector.failoverOnError = true;
+            try (final Connection c = failover.getConnection()) {
+                c.createStatement();
+            }
+
+            assertEquals(1, handler.errors.size());
+            final Map<String, Throwable> errors = handler.errors.iterator().next();
+            assertTrue(errors.containsKey("delegate2"));
+            assertTrue(SQLException.class.isInstance(errors.get("delegate2")));
+            assertEquals("failed", errors.get("delegate2").getMessage());
+        }
+        handler.errors.clear();
+    }
+
+    @Configuration
+    public Properties configuration() {
+        // datasources
+        return new PropertiesBuilder()
+
+            // router
+            .property("router", "new://Resource?class-name=" + FailOverRouter.class.getName())
+            .property("router.datasourceNames", "delegate1,delegate2")
+            .property("router.exceptionSelectorInstance", "$selector")
+            .property("router.errorHandlerInstance", "@errorHandler")
+
+            // routed DS
+            .property("routedDs", "new://Resource?provider=RoutedDataSource&type=DataSource")
+            .property("routedDs.router", "router")
+
+            // delegates
+            .property("delegate1", "new://Resource?type=DataSource")
+            .property("delegate1.JtaManaged", "false")
+            .property("delegate1.JdbcDriver", ControllableDriver.class.getName())
+            .property("delegate1.JdbcUrl", "1")
+            .property("delegate1.TestOnBorrow", "true") // otherwise connections can be created without being valid depending the pool
+            .property("delegate1.validationQuery", "select 1")
+
+            .property("delegate2", "new://Resource?type=DataSource")
+            .property("delegate2.JtaManaged", "false")
+            .property("delegate2.JdbcDriver", ControllableDriver.class.getName())
+            .property("delegate2.JdbcUrl", "2")
+            .property("delegate2.TestOnBorrow", "true")
+            .property("delegate2.validationQuery", "select 1")
+
+            // exception selector
+            .property("selector", "new://Service?class-name=" + SimpleSelector.class.getName())
+
+            // error handler
+            .property("errorHandler", "new://Resource?class-name=" + SimpleHandler.class.getName())
+
+            .build();
+    }
+
+    public static class SimpleSelector implements FailOverRouter.ExceptionSelector {
+        static volatile boolean failoverOnError = false;
+
+        @Override
+        public boolean shouldFailover(final Throwable sqle) {
+            return failoverOnError;
+        }
+    }
+
+    public static class ControllableDriver implements Driver {
+        static final Collection<String> actives = new CopyOnWriteArraySet<>();
+
+        @Override
+        public Connection connect(final String url, final Properties info) throws SQLException {
+            checkActive(url);
+            return new Connection() {
+                @Override
+                public Statement createStatement() throws SQLException {
+                    checkActive(url);
+                    return new Statement() {
+                        @Override
+                        public ResultSet executeQuery(final String sql) throws SQLException {
+                            return newResultSet(sql);
+                        }
+
+                        @Override
+                        public int executeUpdate(final String sql) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void close() throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getMaxFieldSize() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void setMaxFieldSize(final int max) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getMaxRows() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void setMaxRows(final int max) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setEscapeProcessing(final boolean enable) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getQueryTimeout() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void setQueryTimeout(final int seconds) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void cancel() throws SQLException {
+
+                        }
+
+                        @Override
+                        public SQLWarning getWarnings() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public void clearWarnings() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setCursorName(final String name) throws SQLException {
+
+                        }
+
+                        @Override
+                        public boolean execute(final String sql) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public ResultSet getResultSet() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public int getUpdateCount() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public boolean getMoreResults() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void setFetchDirection(final int direction) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getFetchDirection() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void setFetchSize(final int rows) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getFetchSize() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int getResultSetConcurrency() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int getResultSetType() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void addBatch(final String sql) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void clearBatch() throws SQLException {
+
+                        }
+
+                        @Override
+                        public int[] executeBatch() throws SQLException {
+                            return new int[0];
+                        }
+
+                        @Override
+                        public Connection getConnection() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public boolean getMoreResults(final int current) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public ResultSet getGeneratedKeys() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public int executeUpdate(final String sql, final int autoGeneratedKeys) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int executeUpdate(final String sql, final int[] columnIndexes) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int executeUpdate(final String sql, final String[] columnNames) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public boolean execute(final String sql, final int autoGeneratedKeys) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean execute(final String sql, final int[] columnIndexes) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean execute(final String sql, final String[] columnNames) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public int getResultSetHoldability() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public boolean isClosed() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void setPoolable(final boolean poolable) throws SQLException {
+
+                        }
+
+                        @Override
+                        public boolean isPoolable() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void closeOnCompletion() throws SQLException {
+
+                        }
+
+                        @Override
+                        public boolean isCloseOnCompletion() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public <T> T unwrap(final Class<T> iface) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public boolean isWrapperFor(final Class<?> iface) throws SQLException {
+                            return false;
+                        }
+                    };
+                }
+
+                @Override
+                public PreparedStatement prepareStatement(final String sql) throws SQLException {
+                    checkActive(url);
+                    return new PreparedStatement() {
+                        @Override
+                        public ResultSet executeQuery() throws SQLException {
+                            checkActive(url);
+                            return newResultSet(sql);
+                        }
+
+                        @Override
+                        public int executeUpdate() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void setNull(int parameterIndex, int sqlType) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setBoolean(int parameterIndex, boolean x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setByte(int parameterIndex, byte x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setShort(int parameterIndex, short x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setInt(int parameterIndex, int x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setLong(int parameterIndex, long x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setFloat(int parameterIndex, float x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setDouble(int parameterIndex, double x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setBigDecimal(int parameterIndex, BigDecimal x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setString(int parameterIndex, String x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setBytes(int parameterIndex, byte[] x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setDate(int parameterIndex, Date x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setTime(int parameterIndex, Time x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setTimestamp(int parameterIndex, Timestamp x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setAsciiStream(int parameterIndex, InputStream x, int length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setUnicodeStream(int parameterIndex, InputStream x, int length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setBinaryStream(int parameterIndex, InputStream x, int length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void clearParameters() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setObject(int parameterIndex, Object x, int targetSqlType) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setObject(int parameterIndex, Object x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public boolean execute() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void addBatch() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setCharacterStream(int parameterIndex, Reader reader, int length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setRef(int parameterIndex, Ref x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setBlob(int parameterIndex, Blob x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setClob(int parameterIndex, Clob x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setArray(int parameterIndex, Array x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public ResultSetMetaData getMetaData() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public void setDate(int parameterIndex, Date x, Calendar cal) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setTime(int parameterIndex, Time x, Calendar cal) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setTimestamp(int parameterIndex, Timestamp x, Calendar cal) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setNull(int parameterIndex, int sqlType, String typeName) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setURL(int parameterIndex, URL x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public ParameterMetaData getParameterMetaData() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public void setRowId(int parameterIndex, RowId x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setNString(int parameterIndex, String value) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setNCharacterStream(int parameterIndex, Reader value, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setNClob(int parameterIndex, NClob value) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setClob(int parameterIndex, Reader reader, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setBlob(int parameterIndex, InputStream inputStream, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setNClob(int parameterIndex, Reader reader, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setSQLXML(int parameterIndex, SQLXML xmlObject) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setObject(int parameterIndex, Object x, int targetSqlType, int scaleOrLength) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setAsciiStream(int parameterIndex, InputStream x, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setBinaryStream(int parameterIndex, InputStream x, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setCharacterStream(int parameterIndex, Reader reader, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setAsciiStream(int parameterIndex, InputStream x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setBinaryStream(int parameterIndex, InputStream x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setCharacterStream(int parameterIndex, Reader reader) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setNCharacterStream(int parameterIndex, Reader value) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setClob(int parameterIndex, Reader reader) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setBlob(int parameterIndex, InputStream inputStream) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setNClob(int parameterIndex, Reader reader) throws SQLException {
+
+                        }
+
+                        @Override
+                        public ResultSet executeQuery(String sql) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public int executeUpdate(String sql) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void close() throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getMaxFieldSize() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void setMaxFieldSize(int max) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getMaxRows() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void setMaxRows(int max) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setEscapeProcessing(boolean enable) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getQueryTimeout() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void setQueryTimeout(int seconds) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void cancel() throws SQLException {
+
+                        }
+
+                        @Override
+                        public SQLWarning getWarnings() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public void clearWarnings() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void setCursorName(String name) throws SQLException {
+
+                        }
+
+                        @Override
+                        public boolean execute(String sql) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public ResultSet getResultSet() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public int getUpdateCount() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public boolean getMoreResults() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void setFetchDirection(int direction) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getFetchDirection() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void setFetchSize(int rows) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getFetchSize() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int getResultSetConcurrency() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int getResultSetType() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void addBatch(String sql) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void clearBatch() throws SQLException {
+
+                        }
+
+                        @Override
+                        public int[] executeBatch() throws SQLException {
+                            return new int[0];
+                        }
+
+                        @Override
+                        public Connection getConnection() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public boolean getMoreResults(int current) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public ResultSet getGeneratedKeys() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int executeUpdate(String sql, String[] columnNames) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean execute(String sql, int[] columnIndexes) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean execute(String sql, String[] columnNames) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public int getResultSetHoldability() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public boolean isClosed() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void setPoolable(boolean poolable) throws SQLException {
+
+                        }
+
+                        @Override
+                        public boolean isPoolable() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void closeOnCompletion() throws SQLException {
+
+                        }
+
+                        @Override
+                        public boolean isCloseOnCompletion() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public <T> T unwrap(Class<T> iface) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public boolean isWrapperFor(Class<?> iface) throws SQLException {
+                            return false;
+                        }
+                    };
+                }
+
+                private ResultSet newResultSet(final String sql) {
+                    return "select 1".equals(sql) ? new ResultSet() {
+                        private final AtomicBoolean val = new AtomicBoolean(true);
+
+                        @Override
+                        public boolean next() throws SQLException {
+                            return val.getAndSet(false);
+                        }
+
+                        @Override
+                        public void close() throws SQLException {
+
+                        }
+
+                        @Override
+                        public boolean wasNull() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public String getString(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public boolean getBoolean(int columnIndex) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public byte getByte(int columnIndex) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public short getShort(int columnIndex) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int getInt(int columnIndex) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public long getLong(int columnIndex) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public float getFloat(int columnIndex) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public double getDouble(int columnIndex) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public BigDecimal getBigDecimal(int columnIndex, int scale) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public byte[] getBytes(int columnIndex) throws SQLException {
+                            return new byte[0];
+                        }
+
+                        @Override
+                        public Date getDate(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Time getTime(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Timestamp getTimestamp(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public InputStream getAsciiStream(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public InputStream getUnicodeStream(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public InputStream getBinaryStream(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public String getString(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public boolean getBoolean(String columnLabel) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public byte getByte(String columnLabel) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public short getShort(String columnLabel) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int getInt(String columnLabel) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public long getLong(String columnLabel) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public float getFloat(String columnLabel) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public double getDouble(String columnLabel) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public BigDecimal getBigDecimal(String columnLabel, int scale) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public byte[] getBytes(String columnLabel) throws SQLException {
+                            return new byte[0];
+                        }
+
+                        @Override
+                        public Date getDate(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Time getTime(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Timestamp getTimestamp(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public InputStream getAsciiStream(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public InputStream getUnicodeStream(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public InputStream getBinaryStream(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public SQLWarning getWarnings() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public void clearWarnings() throws SQLException {
+
+                        }
+
+                        @Override
+                        public String getCursorName() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public ResultSetMetaData getMetaData() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Object getObject(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Object getObject(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public int findColumn(String columnLabel) throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public Reader getCharacterStream(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Reader getCharacterStream(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public BigDecimal getBigDecimal(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public BigDecimal getBigDecimal(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public boolean isBeforeFirst() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean isAfterLast() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean isFirst() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean isLast() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void beforeFirst() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void afterLast() throws SQLException {
+
+                        }
+
+                        @Override
+                        public boolean first() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean last() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public int getRow() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public boolean absolute(int row) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean relative(int rows) throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean previous() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void setFetchDirection(int direction) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getFetchDirection() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public void setFetchSize(int rows) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getFetchSize() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int getType() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public int getConcurrency() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public boolean rowUpdated() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean rowInserted() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public boolean rowDeleted() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void updateNull(int columnIndex) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBoolean(int columnIndex, boolean x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateByte(int columnIndex, byte x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateShort(int columnIndex, short x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateInt(int columnIndex, int x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateLong(int columnIndex, long x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateFloat(int columnIndex, float x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateDouble(int columnIndex, double x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBigDecimal(int columnIndex, BigDecimal x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateString(int columnIndex, String x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBytes(int columnIndex, byte[] x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateDate(int columnIndex, Date x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateTime(int columnIndex, Time x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateTimestamp(int columnIndex, Timestamp x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateAsciiStream(int columnIndex, InputStream x, int length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBinaryStream(int columnIndex, InputStream x, int length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateCharacterStream(int columnIndex, Reader x, int length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateObject(int columnIndex, Object x, int scaleOrLength) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateObject(int columnIndex, Object x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNull(String columnLabel) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBoolean(String columnLabel, boolean x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateByte(String columnLabel, byte x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateShort(String columnLabel, short x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateInt(String columnLabel, int x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateLong(String columnLabel, long x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateFloat(String columnLabel, float x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateDouble(String columnLabel, double x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBigDecimal(String columnLabel, BigDecimal x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateString(String columnLabel, String x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBytes(String columnLabel, byte[] x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateDate(String columnLabel, Date x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateTime(String columnLabel, Time x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateTimestamp(String columnLabel, Timestamp x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateAsciiStream(String columnLabel, InputStream x, int length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBinaryStream(String columnLabel, InputStream x, int length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateCharacterStream(String columnLabel, Reader reader, int length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateObject(String columnLabel, Object x, int scaleOrLength) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateObject(String columnLabel, Object x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void insertRow() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateRow() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void deleteRow() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void refreshRow() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void cancelRowUpdates() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void moveToInsertRow() throws SQLException {
+
+                        }
+
+                        @Override
+                        public void moveToCurrentRow() throws SQLException {
+
+                        }
+
+                        @Override
+                        public Statement getStatement() throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Object getObject(int columnIndex, Map<String, Class<?>> map) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Ref getRef(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Blob getBlob(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Clob getClob(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Array getArray(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Object getObject(String columnLabel, Map<String, Class<?>> map) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Ref getRef(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Blob getBlob(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Clob getClob(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Array getArray(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Date getDate(int columnIndex, Calendar cal) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Date getDate(String columnLabel, Calendar cal) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Time getTime(int columnIndex, Calendar cal) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Time getTime(String columnLabel, Calendar cal) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Timestamp getTimestamp(int columnIndex, Calendar cal) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Timestamp getTimestamp(String columnLabel, Calendar cal) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public URL getURL(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public URL getURL(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public void updateRef(int columnIndex, Ref x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateRef(String columnLabel, Ref x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBlob(int columnIndex, Blob x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBlob(String columnLabel, Blob x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateClob(int columnIndex, Clob x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateClob(String columnLabel, Clob x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateArray(int columnIndex, Array x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateArray(String columnLabel, Array x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public RowId getRowId(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public RowId getRowId(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public void updateRowId(int columnIndex, RowId x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateRowId(String columnLabel, RowId x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public int getHoldability() throws SQLException {
+                            return 0;
+                        }
+
+                        @Override
+                        public boolean isClosed() throws SQLException {
+                            return false;
+                        }
+
+                        @Override
+                        public void updateNString(int columnIndex, String nString) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNString(String columnLabel, String nString) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNClob(int columnIndex, NClob nClob) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNClob(String columnLabel, NClob nClob) throws SQLException {
+
+                        }
+
+                        @Override
+                        public NClob getNClob(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public NClob getNClob(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public SQLXML getSQLXML(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public SQLXML getSQLXML(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public void updateSQLXML(int columnIndex, SQLXML xmlObject) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateSQLXML(String columnLabel, SQLXML xmlObject) throws SQLException {
+
+                        }
+
+                        @Override
+                        public String getNString(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public String getNString(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Reader getNCharacterStream(int columnIndex) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public Reader getNCharacterStream(String columnLabel) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public void updateNCharacterStream(int columnIndex, Reader x, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNCharacterStream(String columnLabel, Reader reader, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateAsciiStream(int columnIndex, InputStream x, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBinaryStream(int columnIndex, InputStream x, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateCharacterStream(int columnIndex, Reader x, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateAsciiStream(String columnLabel, InputStream x, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBinaryStream(String columnLabel, InputStream x, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateCharacterStream(String columnLabel, Reader reader, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBlob(int columnIndex, InputStream inputStream, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBlob(String columnLabel, InputStream inputStream, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateClob(int columnIndex, Reader reader, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateClob(String columnLabel, Reader reader, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNClob(int columnIndex, Reader reader, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNClob(String columnLabel, Reader reader, long length) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNCharacterStream(int columnIndex, Reader x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNCharacterStream(String columnLabel, Reader reader) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateAsciiStream(int columnIndex, InputStream x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBinaryStream(int columnIndex, InputStream x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateCharacterStream(int columnIndex, Reader x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateAsciiStream(String columnLabel, InputStream x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBinaryStream(String columnLabel, InputStream x) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateCharacterStream(String columnLabel, Reader reader) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBlob(int columnIndex, InputStream inputStream) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateBlob(String columnLabel, InputStream inputStream) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateClob(int columnIndex, Reader reader) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateClob(String columnLabel, Reader reader) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNClob(int columnIndex, Reader reader) throws SQLException {
+
+                        }
+
+                        @Override
+                        public void updateNClob(String columnLabel, Reader reader) throws SQLException {
+
+                        }
+
+                        @Override
+                        public <T> T getObject(int columnIndex, Class<T> type) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public <T> T getObject(String columnLabel, Class<T> type) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public <T> T unwrap(Class<T> iface) throws SQLException {
+                            return null;
+                        }
+
+                        @Override
+                        public boolean isWrapperFor(Class<?> iface) throws SQLException {
+                            return false;
+                        }
+                    } : null;
+                }
+
+                @Override
+                public CallableStatement prepareCall(final String sql) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public String nativeSQL(final String sql) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public void setAutoCommit(final boolean autoCommit) throws SQLException {
+
+                }
+
+                @Override
+                public boolean getAutoCommit() throws SQLException {
+                    return false;
+                }
+
+                @Override
+                public void commit() throws SQLException {
+
+                }
+
+                @Override
+                public void rollback() throws SQLException {
+
+                }
+
+                @Override
+                public void close() throws SQLException {
+
+                }
+
+                @Override
+                public boolean isClosed() throws SQLException {
+                    return false;
+                }
+
+                @Override
+                public DatabaseMetaData getMetaData() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public void setReadOnly(final boolean readOnly) throws SQLException {
+
+                }
+
+                @Override
+                public boolean isReadOnly() throws SQLException {
+                    return false;
+                }
+
+                @Override
+                public void setCatalog(final String catalog) throws SQLException {
+
+                }
+
+                @Override
+                public String getCatalog() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public void setTransactionIsolation(final int level) throws SQLException {
+
+                }
+
+                @Override
+                public int getTransactionIsolation() throws SQLException {
+                    return 0;
+                }
+
+                @Override
+                public SQLWarning getWarnings() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public void clearWarnings() throws SQLException {
+
+                }
+
+                @Override
+                public Statement createStatement(final int resultSetType, final int resultSetConcurrency) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public PreparedStatement prepareStatement(final String sql, final int resultSetType, final int resultSetConcurrency) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public CallableStatement prepareCall(final String sql, final int resultSetType, final int resultSetConcurrency) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public Map<String, Class<?>> getTypeMap() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public void setTypeMap(final Map<String, Class<?>> map) throws SQLException {
+
+                }
+
+                @Override
+                public void setHoldability(final int holdability) throws SQLException {
+
+                }
+
+                @Override
+                public int getHoldability() throws SQLException {
+                    return 0;
+                }
+
+                @Override
+                public Savepoint setSavepoint() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public Savepoint setSavepoint(final String name) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public void rollback(final Savepoint savepoint) throws SQLException {
+
+                }
+
+                @Override
+                public void releaseSavepoint(final Savepoint savepoint) throws SQLException {
+
+                }
+
+                @Override
+                public Statement createStatement(final int resultSetType, final int resultSetConcurrency,
+                                                 final int resultSetHoldability) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public PreparedStatement prepareStatement(final String sql, final int resultSetType,
+                                                          final int resultSetConcurrency, final int resultSetHoldability) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public CallableStatement prepareCall(final String sql, final int resultSetType,
+                                                     final int resultSetConcurrency, final int resultSetHoldability) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public PreparedStatement prepareStatement(final String sql, final int autoGeneratedKeys) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public PreparedStatement prepareStatement(final String sql, final int[] columnIndexes) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public PreparedStatement prepareStatement(final String sql, final String[] columnNames) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public Clob createClob() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public Blob createBlob() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public NClob createNClob() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public SQLXML createSQLXML() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public boolean isValid(int timeout) throws SQLException {
+                    return false;
+                }
+
+                @Override
+                public void setClientInfo(final String name, final String value) throws SQLClientInfoException {
+
+                }
+
+                @Override
+                public void setClientInfo(final Properties properties) throws SQLClientInfoException {
+
+                }
+
+                @Override
+                public String getClientInfo(final String name) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public Properties getClientInfo() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public Array createArrayOf(final String typeName, final Object[] elements) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public Struct createStruct(final String typeName, final Object[] attributes) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public void setSchema(final String schema) throws SQLException {
+
+                }
+
+                @Override
+                public String getSchema() throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public void abort(final Executor executor) throws SQLException {
+
+                }
+
+                @Override
+                public void setNetworkTimeout(final Executor executor, final int milliseconds) throws SQLException {
+
+                }
+
+                @Override
+                public int getNetworkTimeout() throws SQLException {
+                    return 0;
+                }
+
+                @Override
+                public <T> T unwrap(final Class<T> iface) throws SQLException {
+                    return null;
+                }
+
+                @Override
+                public boolean isWrapperFor(final Class<?> iface) throws SQLException {
+                    return false;
+                }
+            };
+        }
+
+        private void checkActive(String url) throws SQLException {
+            if (!actives.contains(url)) {
+                throw new SQLException("failed");
+            }
+        }
+
+        @Override
+        public boolean acceptsURL(final String url) throws SQLException {
+            try {
+                Integer.parseInt(url);
+                return true;
+            } catch (final NumberFormatException nfe) {
+                return false;
+            }
+        }
+
+        @Override
+        public DriverPropertyInfo[] getPropertyInfo(final String url, final Properties info) throws SQLException {
+            return new DriverPropertyInfo[0];
+        }
+
+        @Override
+        public int getMajorVersion() {
+            return 4;
+        }
+
+        @Override
+        public int getMinorVersion() {
+            return 2;
+        }
+
+        @Override
+        public boolean jdbcCompliant() {
+            return false;
+        }
+
+        @Override
+        public Logger getParentLogger() throws SQLFeatureNotSupportedException {
+            return null;
+        }
+    }
+
+    public static class SimpleHandler implements FailOverRouter.ErrorHandler {
+        private final Collection<Map<String, Throwable>> errors = new ArrayList<>();
+
+        @Override
+        public void onError(final Map<String, Throwable> errorByFailingDataSource, final FailOverRouter.DataSourceHolder finallyUsedOrNull) {
+            errors.add(errorByFailingDataSource);
+        }
+    }
+}


[2/2] tomee git commit: TOMEE-1832 avoid useless locking in dbcp2 + TOMEE-1833 ExceptionSelector to activate or not failover

Posted by rm...@apache.org.
TOMEE-1832 avoid useless locking in dbcp2 + TOMEE-1833 ExceptionSelector to activate or not failover


Project: http://git-wip-us.apache.org/repos/asf/tomee/repo
Commit: http://git-wip-us.apache.org/repos/asf/tomee/commit/0175ecd2
Tree: http://git-wip-us.apache.org/repos/asf/tomee/tree/0175ecd2
Diff: http://git-wip-us.apache.org/repos/asf/tomee/diff/0175ecd2

Branch: refs/heads/master
Commit: 0175ecd2e7807ee45fcfdeebf6c6dffa6f69c1bf
Parents: 28a95b7
Author: Romain manni-Bucau <rm...@gmail.com>
Authored: Tue Jun 7 17:17:31 2016 +0200
Committer: Romain manni-Bucau <rm...@gmail.com>
Committed: Tue Jun 7 17:17:31 2016 +0200

----------------------------------------------------------------------
 .../assembler/classic/util/ServiceInfos.java    |   32 +-
 .../resource/jdbc/dbcp/BasicDataSource.java     |  185 +-
 .../resource/jdbc/router/FailOverRouter.java    |   66 +-
 .../jdbc/FailOverRouterErrorHandlerTest.java    |    8 -
 .../FailOverRouterExceptionSelectorTest.java    | 2198 ++++++++++++++++++
 5 files changed, 2336 insertions(+), 153 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/tomee/blob/0175ecd2/container/openejb-core/src/main/java/org/apache/openejb/assembler/classic/util/ServiceInfos.java
----------------------------------------------------------------------
diff --git a/container/openejb-core/src/main/java/org/apache/openejb/assembler/classic/util/ServiceInfos.java b/container/openejb-core/src/main/java/org/apache/openejb/assembler/classic/util/ServiceInfos.java
index ecc0c59..41ac9ce 100644
--- a/container/openejb-core/src/main/java/org/apache/openejb/assembler/classic/util/ServiceInfos.java
+++ b/container/openejb-core/src/main/java/org/apache/openejb/assembler/classic/util/ServiceInfos.java
@@ -168,24 +168,14 @@ public final class ServiceInfos {
                     final List<Object> val = new ArrayList<>(elt.length);
                     for (final String e : elt) {
                         if (!e.trim().isEmpty()) {
-                            val.add(resolve(services, e.startsWith("$") ? e.substring(1) : e));
+                            val.add(e.startsWith("@") ? lookup(e) : resolve(services, e.startsWith("$") ? e.substring(1) : e));
                         }
                     }
                     serviceRecipe.setProperty(key, val);
                 } else if (valueStr.startsWith("$")) {
                     serviceRecipe.setProperty(key, resolve(services, valueStr.substring(1)));
                 } else if (valueStr.startsWith("@")) {
-                    final Context jndiContext = SystemInstance.get().getComponent(ContainerSystem.class).getJNDIContext();
-                    try {
-                        serviceRecipe.setProperty(key, jndiContext.lookup(JndiConstants.OPENEJB_RESOURCE_JNDI_PREFIX + valueStr.substring(1)));
-                    } catch (final NamingException e) {
-                        try {
-                            serviceRecipe.setProperty(key, jndiContext.lookup(valueStr.substring(1)));
-                        } catch (final NamingException e1) {
-                            Logger.getInstance(LogCategory.OPENEJB, ServiceInfos.class).warning("Value " + valueStr + " starting with @ but doesn't point to an existing resource, using raw value");
-                            serviceRecipe.setProperty(key, value);
-                        }
-                    }
+                    serviceRecipe.setProperty(key, lookup(value));
                 } else {
                     serviceRecipe.setProperty(key, value);
                 }
@@ -195,6 +185,24 @@ public final class ServiceInfos {
         }
     }
 
+    private static Object lookup(final Object value) {
+        final String name = String.valueOf(value).substring(1);
+        final Context jndiContext = SystemInstance.get().getComponent(ContainerSystem.class).getJNDIContext();
+        Object lookup;
+        try {
+            lookup = jndiContext.lookup(JndiConstants.OPENEJB_RESOURCE_JNDI_PREFIX + name);
+        } catch (final NamingException e) {
+            try {
+                lookup = jndiContext.lookup(name);
+            } catch (final NamingException e1) {
+                Logger.getInstance(LogCategory.OPENEJB, ServiceInfos.class)
+                        .warning("Value " + name + " starting with @ but doesn't point to an existing resource, using raw value");
+                lookup = value;
+            }
+        }
+        return lookup;
+    }
+
     public interface Factory {
         Object newInstance(final Class<?> clazz) throws Exception;
     }

http://git-wip-us.apache.org/repos/asf/tomee/blob/0175ecd2/container/openejb-core/src/main/java/org/apache/openejb/resource/jdbc/dbcp/BasicDataSource.java
----------------------------------------------------------------------
diff --git a/container/openejb-core/src/main/java/org/apache/openejb/resource/jdbc/dbcp/BasicDataSource.java b/container/openejb-core/src/main/java/org/apache/openejb/resource/jdbc/dbcp/BasicDataSource.java
index 995221c..37096b3 100644
--- a/container/openejb-core/src/main/java/org/apache/openejb/resource/jdbc/dbcp/BasicDataSource.java
+++ b/container/openejb-core/src/main/java/org/apache/openejb/resource/jdbc/dbcp/BasicDataSource.java
@@ -29,23 +29,21 @@ import org.apache.openejb.resource.jdbc.IsolationLevels;
 import org.apache.openejb.resource.jdbc.plugin.DataSourcePlugin;
 import org.apache.openejb.util.reflection.Reflections;
 
+import javax.sql.CommonDataSource;
+import javax.sql.DataSource;
+import javax.sql.XADataSource;
 import java.io.File;
 import java.io.ObjectStreamException;
 import java.io.Serializable;
 import java.sql.SQLException;
 import java.sql.SQLFeatureNotSupportedException;
 import java.util.Properties;
-import java.util.concurrent.locks.ReentrantLock;
 import java.util.logging.Logger;
-import javax.sql.CommonDataSource;
-import javax.sql.DataSource;
-import javax.sql.XADataSource;
 
 @SuppressWarnings({"UnusedDeclaration"})
 public class BasicDataSource extends org.apache.commons.dbcp2.BasicDataSource implements Serializable {
-    private final ReentrantLock lock = new ReentrantLock();
-
-    private Logger logger;
+    private volatile Logger logger;
+    private volatile DataSource dsRef = null;
 
     /**
      * The password codec to be used to retrieve the plain text password from a
@@ -105,14 +103,8 @@ public class BasicDataSource extends org.apache.commons.dbcp2.BasicDataSource im
      *
      * @return the password codec class
      */
-    public String getPasswordCipher() {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            return this.passwordCipher;
-        } finally {
-            l.unlock();
-        }
+    public synchronized String getPasswordCipher() {
+        return this.passwordCipher;
     }
 
     /**
@@ -122,121 +114,61 @@ public class BasicDataSource extends org.apache.commons.dbcp2.BasicDataSource im
      *
      * @param passwordCipher password codec value
      */
-    public void setPasswordCipher(final String passwordCipher) {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            this.passwordCipher = passwordCipher;
-        } finally {
-            l.unlock();
-        }
+    public synchronized void setPasswordCipher(final String passwordCipher) {
+        this.passwordCipher = passwordCipher;
     }
 
     @Override
-    public void setPassword(final String password) {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            // keep the encrypted value if it's encrypted
-            this.initialPassword = password;
-            super.setPassword(password);
-        } finally {
-            l.unlock();
-        }
+    public synchronized void setPassword(final String password) {
+        // keep the encrypted value if it's encrypted
+        this.initialPassword = password;
+        super.setPassword(password);
     }
 
-    public String getUserName() {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            return super.getUsername();
-        } finally {
-            l.unlock();
-        }
+    public synchronized String getUserName() {
+        return super.getUsername();
     }
 
-    public void setUserName(final String string) {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            super.setUsername(string);
-        } finally {
-            l.unlock();
-        }
+    public synchronized void setUserName(final String string) {
+        super.setUsername(string);
     }
 
-    public String getJdbcDriver() {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            return super.getDriverClassName();
-        } finally {
-            l.unlock();
-        }
+    public synchronized String getJdbcDriver() {
+        return super.getDriverClassName();
     }
 
-    public void setJdbcDriver(final String string) {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            super.setDriverClassName(string);
-        } finally {
-            l.unlock();
-        }
+    public synchronized void setJdbcDriver(final String string) {
+        super.setDriverClassName(string);
     }
 
-    public String getJdbcUrl() {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            return super.getUrl();
-        } finally {
-            l.unlock();
-        }
+    public synchronized String getJdbcUrl() {
+        return super.getUrl();
     }
 
     public void setJdbcUrl(final String string) {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            super.setUrl(string);
-        } finally {
-            l.unlock();
-        }
+        super.setUrl(string);
     }
 
-    public void setDefaultTransactionIsolation(final String s) {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            if (s == null || s.equals("")) {
-                return;
-            }
-            final int level = IsolationLevels.getIsolationLevel(s);
-            super.setDefaultTransactionIsolation(level);
-        } finally {
-            l.unlock();
+    public synchronized void setDefaultTransactionIsolation(final String s) {
+        if (s == null || s.equals("")) {
+            return;
         }
+        final int level = IsolationLevels.getIsolationLevel(s);
+        super.setDefaultTransactionIsolation(level);
     }
 
-    public void setMaxWait(final int maxWait) {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            super.setMaxWaitMillis((long) maxWait);
-        } finally {
-            l.unlock();
-        }
+    public synchronized void setMaxWait(final int maxWait) {
+        super.setMaxWaitMillis((long) maxWait);
     }
 
     @Override
     protected DataSource createDataSource() throws SQLException {
-        final ReentrantLock l = lock;
-        l.lock();
-        try {
-            final Object dataSource = Reflections.get(this, "dataSource");
-            if (dataSource != null) {
-                return DataSource.class.cast(dataSource);
+        if (dsRef != null) {
+            return dsRef;
+        }
+        synchronized (this) {
+            if (dsRef != null) {
+                return dsRef;
             }
 
             // check password codec if available
@@ -265,7 +197,7 @@ public class BasicDataSource extends org.apache.commons.dbcp2.BasicDataSource im
             // create the data source
             if (helper == null || !helper.enableUserDirHack()) {
                 try {
-                    return super.createDataSource();
+                    super.createDataSource();
                 } catch (final Throwable e) {
                     throw toSQLException(e);
                 }
@@ -278,17 +210,15 @@ public class BasicDataSource extends org.apache.commons.dbcp2.BasicDataSource im
                     final File base = SystemInstance.get().getBase().getDirectory();
                     systemProperties.setProperty("user.dir", base.getAbsolutePath());
                     try {
-                        return super.createDataSource();
+                        super.createDataSource();
                     } catch (final Throwable e) {
                         throw toSQLException(e);
                     }
                 } finally {
                     systemProperties.setProperty("user.dir", userDir);
                 }
-
             }
-        } finally {
-            l.unlock();
+            return dsRef = DataSource.class.cast(Reflections.get(this, "dataSource"));
         }
     }
 
@@ -299,21 +229,17 @@ public class BasicDataSource extends org.apache.commons.dbcp2.BasicDataSource im
         return new SQLException("Failed to create DataSource", e);
     }
 
-    public void close() throws SQLException {
-        //TODO - Prevent unuathorized call
-        final ReentrantLock l = lock;
-        l.lock();
+    @Override
+    public synchronized void close() throws SQLException {
         try {
-            try {
-                unregisterMBean();
-            } catch (final Exception ignored) {
-                // no-op
-            }
-
-            super.close();
-        } finally {
-            l.unlock();
+            unregisterMBean();
+        } catch (final Exception ignored) {
+            // no-op
         }
+
+        super.close();
+        dsRef = null;
+        logger = null;
     }
 
     private void unregisterMBean() {
@@ -322,20 +248,19 @@ public class BasicDataSource extends org.apache.commons.dbcp2.BasicDataSource im
         }
     }
 
+    @Override
     public Logger getParentLogger() throws SQLFeatureNotSupportedException {
-        final ReentrantLock l = lock;
-        l.lock();
         try {
-
             if (null == this.logger) {
-                this.logger = (Logger) Reflections.invokeByReflection(createDataSource(), "getParentLogger", new Class<?>[0], null);
+                synchronized (this) {
+                    if (null == this.logger) {
+                        this.logger = (Logger) Reflections.invokeByReflection(createDataSource(), "getParentLogger", new Class<?>[0], null);
+                    }
+                }
             }
-
             return this.logger;
         } catch (final Throwable e) {
             throw new SQLFeatureNotSupportedException();
-        } finally {
-            l.unlock();
         }
     }
 

http://git-wip-us.apache.org/repos/asf/tomee/blob/0175ecd2/container/openejb-core/src/main/java/org/apache/openejb/resource/jdbc/router/FailOverRouter.java
----------------------------------------------------------------------
diff --git a/container/openejb-core/src/main/java/org/apache/openejb/resource/jdbc/router/FailOverRouter.java b/container/openejb-core/src/main/java/org/apache/openejb/resource/jdbc/router/FailOverRouter.java
index 0ab5b35..2556d42 100644
--- a/container/openejb-core/src/main/java/org/apache/openejb/resource/jdbc/router/FailOverRouter.java
+++ b/container/openejb-core/src/main/java/org/apache/openejb/resource/jdbc/router/FailOverRouter.java
@@ -32,6 +32,7 @@ import java.lang.reflect.InvocationHandler;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Proxy;
+import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -47,6 +48,7 @@ public class FailOverRouter extends AbstractRouter {
 
     public static final String DEFAULT_STRATEGY = "default";
 
+    private ExceptionSelector exceptionSelectorRuntime;
     private ErrorHandler errorHandlerRuntime;
     private Strategy strategyRuntime;
     private DataSource facade;
@@ -84,6 +86,21 @@ public class FailOverRouter extends AbstractRouter {
         this.strategyRuntime = strategy;
     }
 
+    public void setExceptionSelectorInstance(final ExceptionSelector selector) {
+        exceptionSelectorRuntime = selector;
+    }
+
+    public void setExceptionSelector(final String selector) {
+        try {
+            exceptionSelectorRuntime = "mysql".equalsIgnoreCase(selector) ?
+                    new MySQLExceptionSelector() :
+                    ExceptionSelector.class.cast(Thread.currentThread().getContextClassLoader()
+                            .loadClass(selector.trim()).newInstance());
+        } catch (final InstantiationException | IllegalAccessException | ClassNotFoundException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
     public void setErrorHandlerInstance(final ErrorHandler errorHandler) {
         errorHandlerRuntime = errorHandler;
     }
@@ -214,7 +231,7 @@ public class FailOverRouter extends AbstractRouter {
     private void initFacade() {
         facade = DataSource.class.cast(Proxy.newProxyInstance(
                 Thread.currentThread().getContextClassLoader(),
-                new Class<?>[]{DataSource.class}, new FacadeHandler(dataSources, strategyRuntime, errorHandlerRuntime)));
+                new Class<?>[]{DataSource.class}, new FacadeHandler(dataSources, strategyRuntime, errorHandlerRuntime, exceptionSelectorRuntime)));
     }
 
     public Collection<DataSourceHolder> getDataSources() {
@@ -230,15 +247,18 @@ public class FailOverRouter extends AbstractRouter {
     private static class FacadeHandler implements InvocationHandler {
         private static final TransactionSynchronizationRegistry SYNCHRONIZATION_REGISTRY = SystemInstance.get().getComponent(TransactionSynchronizationRegistry.class);
 
+        private final TransactionManager transactionManager;
         private final Collection<DataSourceHolder> delegates;
         private final Strategy strategy;
-        private final TransactionManager transactionManager;
         private final ErrorHandler handler;
+        private final ExceptionSelector selector;
 
-        public FacadeHandler(final Collection<DataSourceHolder> dataSources, final Strategy strategy, final ErrorHandler handler) {
+        public FacadeHandler(final Collection<DataSourceHolder> dataSources, final Strategy strategy,
+                             final ErrorHandler handler, final ExceptionSelector selector) {
             this.delegates = dataSources;
             this.strategy = strategy;
             this.handler = handler;
+            this.selector = selector;
             this.transactionManager = OpenEJB.getTransactionManager();
         }
 
@@ -290,6 +310,14 @@ public class FailOverRouter extends AbstractRouter {
                         break;
                     }
                 } catch (final InvocationTargetException ite) {
+                    final Throwable cause = ite.getTargetException();
+                    if (selector != null && !selector.shouldFailover(cause)) {
+                        if (failed != null) {
+                            handler.onError(failed, ds);
+                        }
+                        throw cause;
+                    }
+
                     if (handler != null) {
                         if (failed == null) {
                             failed = new HashMap<>();
@@ -315,6 +343,38 @@ public class FailOverRouter extends AbstractRouter {
         }
     }
 
+    public interface ExceptionSelector {
+        boolean shouldFailover(final Throwable sqle);
+    }
+
+    public abstract class SQLExceptionSelector implements ExceptionSelector {
+        @Override
+        public boolean shouldFailover(final Throwable sqle) {
+            return SQLException.class.isInstance(sqle) && shouldFailover(SQLException.class.cast(sqle));
+        }
+
+        abstract boolean shouldFailover(final SQLException sqle);
+    }
+
+    public class MySQLExceptionSelector extends SQLExceptionSelector {
+        private final Class<?> communicationException;
+
+        public MySQLExceptionSelector() {
+            try {
+                communicationException = Thread.currentThread().getContextClassLoader().loadClass("com.mysql.jdbc.CommunicationsException");
+            } catch (final ClassNotFoundException e) {
+                throw new IllegalArgumentException("com.mysql.jdbc.CommunicationsException not available, please use another ExceptionSelector");
+            }
+        }
+
+        @Override
+        public boolean shouldFailover(final SQLException ex) {
+            final String sqlState = ex.getSQLState();
+            return (sqlState != null && sqlState.startsWith("08")) ||
+                    communicationException.isInstance(ex);
+        }
+    }
+
     public interface ErrorHandler {
         void onError(final Map<String, Throwable> errorByFailingDataSource, final DataSourceHolder finallyUsedOrNull);
     }

http://git-wip-us.apache.org/repos/asf/tomee/blob/0175ecd2/container/openejb-core/src/test/java/org/apache/openejb/resource/jdbc/FailOverRouterErrorHandlerTest.java
----------------------------------------------------------------------
diff --git a/container/openejb-core/src/test/java/org/apache/openejb/resource/jdbc/FailOverRouterErrorHandlerTest.java b/container/openejb-core/src/test/java/org/apache/openejb/resource/jdbc/FailOverRouterErrorHandlerTest.java
index f638c04..38ed9e7 100644
--- a/container/openejb-core/src/test/java/org/apache/openejb/resource/jdbc/FailOverRouterErrorHandlerTest.java
+++ b/container/openejb-core/src/test/java/org/apache/openejb/resource/jdbc/FailOverRouterErrorHandlerTest.java
@@ -57,10 +57,8 @@ import java.sql.Struct;
 import java.sql.Time;
 import java.sql.Timestamp;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Calendar;
 import java.util.Collection;
-import java.util.Iterator;
 import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.CopyOnWriteArraySet;
@@ -108,12 +106,6 @@ public class FailOverRouterErrorHandlerTest {
         }
     }
 
-    private void rotate() {
-        final Iterator<FailOverRouter.DataSourceHolder> it = router.getDataSources().iterator();
-        final FailOverRouter.DataSourceHolder ds1 = it.next();
-        router.updateDataSources(Arrays.asList(it.next(), it.next(), ds1));
-    }
-
     @Configuration
     public Properties configuration() {
         // datasources