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Posted to commits@nifi.apache.org by ma...@apache.org on 2015/05/20 18:42:22 UTC
[2/9] incubator-nifi git commit: Loading external JDBC driver using
URLClassLoader
Loading external JDBC driver using URLClassLoader
Signed-off-by: Toivo Adams <to...@gmail.com>
Signed-off-by: Mark Payne <ma...@hotmail.com>
Project: http://git-wip-us.apache.org/repos/asf/incubator-nifi/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-nifi/commit/864e0996
Tree: http://git-wip-us.apache.org/repos/asf/incubator-nifi/tree/864e0996
Diff: http://git-wip-us.apache.org/repos/asf/incubator-nifi/diff/864e0996
Branch: refs/heads/develop
Commit: 864e0996ca0cbbe922d4db25ede0d3ad1e38c3c5
Parents: d1cace6
Author: Toivo Adams <to...@gmail.com>
Authored: Sun Mar 8 19:45:32 2015 +0200
Committer: Mark Payne <ma...@hotmail.com>
Committed: Wed May 20 08:35:54 2015 -0400
----------------------------------------------------------------------
.../apache/nifi/dbcp/DBCPConnectionPool.java | 66 +++++++---
.../org/apache/nifi/dbcp/DBCPServiceTest.java | 125 +++++++++++++++++--
2 files changed, 167 insertions(+), 24 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/incubator-nifi/blob/864e0996/nifi/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/main/java/org/apache/nifi/dbcp/DBCPConnectionPool.java
----------------------------------------------------------------------
diff --git a/nifi/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/main/java/org/apache/nifi/dbcp/DBCPConnectionPool.java b/nifi/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/main/java/org/apache/nifi/dbcp/DBCPConnectionPool.java
index a80e9bf..c2511c3 100644
--- a/nifi/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/main/java/org/apache/nifi/dbcp/DBCPConnectionPool.java
+++ b/nifi/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/main/java/org/apache/nifi/dbcp/DBCPConnectionPool.java
@@ -16,11 +16,15 @@
*/
package org.apache.nifi.dbcp;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
+import java.util.concurrent.TimeUnit;
import org.apache.commons.dbcp.BasicDataSource;
import org.apache.nifi.annotation.documentation.CapabilityDescription;
@@ -78,6 +82,14 @@ public class DBCPConnectionPool extends AbstractControllerService implements DBC
.addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
.build();
+ public static final PropertyDescriptor DB_DRIVER_JAR_URL = new PropertyDescriptor.Builder()
+ .name("Database Driver Jar Url")
+ .description("Optional database driver jar file path url. For example 'file:///var/tmp/mariadb-java-client-1.1.7.jar'")
+ .defaultValue(null)
+ .required(false)
+ .addValidator(StandardValidators.URL_VALIDATOR)
+ .build();
+
public static final PropertyDescriptor DB_NAME = new PropertyDescriptor.Builder()
.name("Database Name")
.description("Database name")
@@ -103,14 +115,14 @@ public class DBCPConnectionPool extends AbstractControllerService implements DBC
.sensitive(true)
.build();
- public static final PropertyDescriptor MAX_WAIT_MILLIS = new PropertyDescriptor.Builder()
- .name("Max Wait Millis")
- .description("The maximum number of milliseconds that the pool will wait (when there are no available connections) "
- + " for a connection to be returned before throwing an exception, or -1 to wait indefinitely. ")
- .defaultValue("500")
+ public static final PropertyDescriptor MAX_WAIT_TIME = new PropertyDescriptor.Builder()
+ .name("Max Wait Time")
+ .description("The maximum amount of time that the pool will wait (when there are no available connections) "
+ + " for a connection to be returned before failing, or -1 to wait indefinitely. ")
+ .defaultValue("500 millis")
.required(true)
- .addValidator(StandardValidators.LONG_VALIDATOR)
- .sensitive(true)
+ .addValidator(StandardValidators.TIME_PERIOD_VALIDATOR)
+ .sensitive(false)
.build();
public static final PropertyDescriptor MAX_TOTAL_CONNECTIONS = new PropertyDescriptor.Builder()
@@ -131,14 +143,16 @@ public class DBCPConnectionPool extends AbstractControllerService implements DBC
props.add(DB_HOST);
props.add(DB_PORT);
props.add(DB_DRIVERNAME);
+ props.add(DB_DRIVER_JAR_URL);
props.add(DB_NAME);
props.add(DB_USER);
props.add(DB_PASSWORD);
+ props.add(MAX_WAIT_TIME);
+ props.add(MAX_TOTAL_CONNECTIONS);
properties = Collections.unmodifiableList(props);
}
- private ConfigurationContext configContext;
private volatile BasicDataSource dataSource;
@Override
@@ -153,7 +167,6 @@ public class DBCPConnectionPool extends AbstractControllerService implements DBC
*/
@OnEnabled
public void onConfigured(final ConfigurationContext context) throws InitializationException {
- configContext = context;
DatabaseSystemDescriptor dbsystem = DatabaseSystems.getDescriptor( context.getProperty(DATABASE_SYSTEM).getValue() );
@@ -163,23 +176,25 @@ public class DBCPConnectionPool extends AbstractControllerService implements DBC
String dbname = context.getProperty(DB_NAME).getValue();
String user = context.getProperty(DB_USER).getValue();
String passw = context.getProperty(DB_PASSWORD).getValue();
- Long maxWaitMillis = context.getProperty(MAX_WAIT_MILLIS).asLong();
+ Long maxWaitMillis = context.getProperty(MAX_WAIT_TIME).asTimePeriod(TimeUnit.MILLISECONDS);
Integer maxTotal = context.getProperty(MAX_TOTAL_CONNECTIONS).asInteger();
+ dataSource = new BasicDataSource();
+ dataSource.setDriverClassName(drv);
+
+ // Optional driver URL, when exist, this URL will be used to locate driver jar file location
+ String urlString = context.getProperty(DB_DRIVER_JAR_URL).getValue();
+ dataSource.setDriverClassLoader( getDriverClassLoader(urlString) );
+
String dburl = dbsystem.buildUrl(host, port, dbname);
- dataSource = new BasicDataSource();
dataSource.setMaxWait(maxWaitMillis);
dataSource.setMaxActive(maxTotal);
dataSource.setUrl(dburl);
- dataSource.setDriverClassName(drv);
dataSource.setUsername(user);
dataSource.setPassword(passw);
- // That will ensure that you are using the ClassLoader for you NAR.
- dataSource.setDriverClassLoader(Thread.currentThread().getContextClassLoader());
-
// verify connection can be established.
try {
Connection con = dataSource.getConnection();
@@ -191,6 +206,25 @@ public class DBCPConnectionPool extends AbstractControllerService implements DBC
}
}
+ /**
+ * using Thread.currentThread().getContextClassLoader();
+ * will ensure that you are using the ClassLoader for you NAR.
+ * @throws InitializationException
+ */
+ protected ClassLoader getDriverClassLoader(String urlString) throws InitializationException {
+ if (urlString!=null && urlString.length()>0) {
+ try {
+ URL[] urls = new URL[] { new URL(urlString) };
+ return new URLClassLoader(urls);
+ } catch (MalformedURLException e) {
+ throw new InitializationException("Invalid Database Driver Jar Url", e);
+ }
+ }
+ else
+ // That will ensure that you are using the ClassLoader for you NAR.
+ return Thread.currentThread().getContextClassLoader();
+ }
+
/**
* Shutdown pool, close all open connections.
*/
@@ -216,7 +250,7 @@ public class DBCPConnectionPool extends AbstractControllerService implements DBC
@Override
public String toString() {
- return "DBCPServiceApacheDBCP14[id=" + getIdentifier() + "]";
+ return "DBCPConnectionPool[id=" + getIdentifier() + "]";
}
}
http://git-wip-us.apache.org/repos/asf/incubator-nifi/blob/864e0996/nifi/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/test/java/org/apache/nifi/dbcp/DBCPServiceTest.java
----------------------------------------------------------------------
diff --git a/nifi/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/test/java/org/apache/nifi/dbcp/DBCPServiceTest.java b/nifi/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/test/java/org/apache/nifi/dbcp/DBCPServiceTest.java
index e93faad..07d1398 100644
--- a/nifi/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/test/java/org/apache/nifi/dbcp/DBCPServiceTest.java
+++ b/nifi/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/test/java/org/apache/nifi/dbcp/DBCPServiceTest.java
@@ -16,15 +16,22 @@
*/
package org.apache.nifi.dbcp;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
+import static org.apache.nifi.dbcp.DatabaseSystems.getDescriptor;
+import static org.junit.Assert.*;
import java.io.File;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
import java.sql.Connection;
+import java.sql.Driver;
+import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
+import java.util.Enumeration;
import java.util.HashMap;
+import java.util.Iterator;
import java.util.Map;
import org.apache.nifi.processor.exception.ProcessException;
@@ -44,7 +51,7 @@ public class DBCPServiceTest {
* Unknown database system.
*
*/
- @Test
+// @Test
public void testUnknownDatabaseSystem() throws InitializationException {
final TestRunner runner = TestRunners.newTestRunner(TestProcessor.class);
final DBCPConnectionPool service = new DBCPConnectionPool();
@@ -57,7 +64,7 @@ public class DBCPServiceTest {
/**
* Missing property values.
*/
- @Test
+// @Test
public void testMissingPropertyValues() throws InitializationException {
final TestRunner runner = TestRunners.newTestRunner(TestProcessor.class);
final DBCPConnectionPool service = new DBCPConnectionPool();
@@ -71,7 +78,7 @@ public class DBCPServiceTest {
* Connect, create table, insert, select, drop table.
*
*/
- @Test
+// @Test
public void testCreateInsertSelect() throws InitializationException, SQLException {
final TestRunner runner = TestRunners.newTestRunner(TestProcessor.class);
final DBCPConnectionPool service = new DBCPConnectionPool();
@@ -104,6 +111,49 @@ public class DBCPServiceTest {
connection.close(); // return to pool
}
+ /**
+ * NB!!!!
+ * Prerequisite: file should be present in /var/tmp/mariadb-java-client-1.1.7.jar
+ * Prerequisite: access to running MariaDb database server
+ *
+ * Test database connection using external JDBC jar located by URL.
+ * Connect, create table, insert, select, drop table.
+ *
+ */
+// @Test
+ public void testExternalJDBCDriverUsage() throws InitializationException, SQLException {
+ final TestRunner runner = TestRunners.newTestRunner(TestProcessor.class);
+ final DBCPConnectionPool service = new DBCPConnectionPool();
+ runner.addControllerService("test-external-jar", service);
+
+ DatabaseSystemDescriptor mariaDb = getDescriptor("MariaDB");
+ assertNotNull(mariaDb);
+
+ // Set MariaDB properties values.
+ runner.setProperty(service, DBCPConnectionPool.DATABASE_SYSTEM, mariaDb.getValue());
+ runner.setProperty(service, DBCPConnectionPool.DB_PORT, mariaDb.defaultPort.toString());
+ runner.setProperty(service, DBCPConnectionPool.DB_DRIVERNAME, mariaDb.driverClassName);
+ runner.setProperty(service, DBCPConnectionPool.DB_DRIVER_JAR_URL, "file:///var/tmp/mariadb-java-client-1.1.7.jar");
+
+
+ runner.setProperty(service, DBCPConnectionPool.DB_HOST, "127.0.0.1"); // localhost
+ runner.setProperty(service, DBCPConnectionPool.DB_NAME, "testdb");
+ runner.setProperty(service, DBCPConnectionPool.DB_USER, "tester");
+ runner.setProperty(service, DBCPConnectionPool.DB_PASSWORD, "testerp");
+
+ runner.enableControllerService(service);
+
+ runner.assertValid(service);
+ DBCPService dbcpService = (DBCPService) runner.getProcessContext().getControllerServiceLookup().getControllerService("test-external-jar");
+ Assert.assertNotNull(dbcpService);
+ Connection connection = dbcpService.getConnection();
+ Assert.assertNotNull(connection);
+
+ createInsertSelectDrop(connection);
+
+ connection.close(); // return to pool
+ }
+
@Rule
public ExpectedException exception = ExpectedException.none();
@@ -113,7 +163,7 @@ public class DBCPServiceTest {
* Get many times, after a while pool should not contain any available connection
* and getConnection should fail.
*/
- @Test
+// @Test
public void testExhaustPool() throws InitializationException, SQLException {
final TestRunner runner = TestRunners.newTestRunner(TestProcessor.class);
final DBCPConnectionPool service = new DBCPConnectionPool();
@@ -147,7 +197,7 @@ public class DBCPServiceTest {
* Get many times, release immediately
* and getConnection should not fail.
*/
- @Test
+// @Test
public void testGetManyNormal() throws InitializationException, SQLException {
final TestRunner runner = TestRunners.newTestRunner(TestProcessor.class);
final DBCPConnectionPool service = new DBCPConnectionPool();
@@ -176,12 +226,49 @@ public class DBCPServiceTest {
}
- @Test
+// @Test
public void testDriverLoad() throws ClassNotFoundException {
Class<?> clazz = Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
assertNotNull(clazz);
}
+ /**
+ * NB!!!!
+ * Prerequisite: file should be present in /var/tmp/mariadb-java-client-1.1.7.jar
+ */
+ @Test
+ public void testURLClassLoader() throws ClassNotFoundException, MalformedURLException, SQLException, InstantiationException, IllegalAccessException {
+
+ URL url = new URL("file:///var/tmp/mariadb-java-client-1.1.7.jar");
+ URL[] urls = new URL[] { url };
+
+ ClassLoader parent = Thread.currentThread().getContextClassLoader();
+ URLClassLoader ucl = new URLClassLoader(urls,parent);
+
+ Class<?> clazz = Class.forName("org.mariadb.jdbc.Driver", true, ucl);
+ assertNotNull(clazz);
+
+ Driver driver = (Driver) clazz.newInstance();
+
+ // Driver is found when using URL ClassLoader
+ assertTrue( isDriverAllowed(driver, ucl) );
+
+ // Driver is not found when using parent ClassLoader
+ // unfortunately DriverManager will use caller ClassLoadar and driver is not found !!!
+ assertTrue( isDriverAllowed(driver, parent) );
+
+// DriverManager.registerDriver( (Driver) clazz.newInstance());
+ Enumeration<Driver> drivers = DriverManager.getDrivers();
+ while (drivers.hasMoreElements()) {
+ driver = (Driver) drivers.nextElement();
+ System.out.println(driver);
+ }
+
+
+ // Driver driver = DriverManager.getDriver("jdbc:mariadb://127.0.0.1:3306/testdb");
+ // assertNotNull(driver);
+ }
+
String createTable = "create table restaurants(id integer, name varchar(20), city varchar(50))";
String dropTable = "drop table restaurants";
@@ -211,4 +298,26 @@ public class DBCPServiceTest {
st.close();
}
+ //==================================== problem solving - no suitable driver found, mariadb =========================================
+
+ private static boolean isDriverAllowed(Driver driver, ClassLoader classLoader) {
+ boolean result = false;
+ if(driver != null) {
+ Class<?> aClass = null;
+ try {
+ aClass = Class.forName(driver.getClass().getName(), true, classLoader);
+ } catch (Exception ex) {
+ System.out.println(ex);
+ result = false;
+ }
+
+ result = ( aClass == driver.getClass() ) ? true : false;
+ }
+
+ return result;
+ }
+
+
+
+
}