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Posted to commits@sqoop.apache.org by ja...@apache.org on 2014/10/21 15:40:01 UTC

[2/2] git commit: SQOOP-1551: Repository Upgrader api - Extensibility

SQOOP-1551: Repository Upgrader api - Extensibility

(Veena Basavaraj via Jarek Jarcec Cecho)


Project: http://git-wip-us.apache.org/repos/asf/sqoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/sqoop/commit/39a22000
Tree: http://git-wip-us.apache.org/repos/asf/sqoop/tree/39a22000
Diff: http://git-wip-us.apache.org/repos/asf/sqoop/diff/39a22000

Branch: refs/heads/sqoop2
Commit: 39a22000079412d6181d43f40ae3cb20afc624c5
Parents: 3257b38
Author: Jarek Jarcec Cecho <ja...@apache.org>
Authored: Tue Oct 21 06:39:32 2014 -0700
Committer: Jarek Jarcec Cecho <ja...@apache.org>
Committed: Tue Oct 21 06:39:32 2014 -0700

----------------------------------------------------------------------
 .../org/apache/sqoop/model/Configurable.java    |  25 +++
 .../apache/sqoop/model/MConfigurableType.java   |  30 +++
 .../java/org/apache/sqoop/model/MConnector.java |   4 +-
 .../java/org/apache/sqoop/model/MDriver.java    |   2 +-
 .../main/java/org/apache/sqoop/model/MJob.java  |   8 +
 .../connector/jdbc/GenericJdbcConnector.java    |   4 +-
 .../jdbc/GenericJdbcConnectorUpgrader.java      |  63 ++-----
 .../connector/hdfs/HdfsConfigUpgrader.java      |  81 ---------
 .../sqoop/connector/hdfs/HdfsConnector.java     |   8 +-
 .../connector/hdfs/HdfsConnectorUpgrader.java   |  45 +++++
 .../sqoop/connector/ConnectorHandler.java       |  32 ++--
 .../sqoop/connector/ConnectorManager.java       |  33 ++--
 .../java/org/apache/sqoop/driver/Driver.java    |  18 +-
 .../sqoop/driver/DriverConfigUpgrader.java      |  77 --------
 .../sqoop/driver/DriverConfigValidator.java     |   6 +-
 .../org/apache/sqoop/driver/DriverUpgrader.java |  29 +++
 .../org/apache/sqoop/driver/JobManager.java     |  14 +-
 .../configuration/DriverConfiguration.java      |  34 ----
 .../driver/configuration/JobConfiguration.java  |  34 ++++
 .../apache/sqoop/repository/JdbcRepository.java |  12 +-
 .../sqoop/repository/JdbcRepositoryHandler.java |   4 +-
 .../org/apache/sqoop/repository/Repository.java | 181 ++++++++++---------
 .../sqoop/driver/TestDriverConfigUpgrader.java  |  62 ++++---
 .../org/apache/sqoop/driver/TestJobManager.java |   6 +-
 .../sqoop/repository/TestJdbcRepository.java    | 128 +++++++------
 .../derby/DerbyRepositoryHandler.java           |  40 ++--
 .../repository/derby/TestDriverHandling.java    |   2 +-
 .../sqoop/handler/ConnectorRequestHandler.java  |   4 +-
 .../apache/sqoop/handler/JobRequestHandler.java |  10 +-
 .../sqoop/handler/LinkRequestHandler.java       |   4 +-
 .../configurable/ConfigurableUpgradeUtil.java   |  62 +++++++
 .../sqoop/connector/ConfigurableError.java      |  43 +++++
 .../spi/ConnectorConfigurableUpgrader.java      |  84 +++++++++
 .../sqoop/connector/spi/RepositoryUpgrader.java |  51 ------
 .../sqoop/connector/spi/SqoopConnector.java     |   6 +-
 .../sqoop/tools/tool/RepositoryDumpTool.java    |   2 +-
 .../sqoop/tools/tool/RepositoryLoadTool.java    |  71 ++++----
 37 files changed, 713 insertions(+), 606 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/common/src/main/java/org/apache/sqoop/model/Configurable.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/sqoop/model/Configurable.java b/common/src/main/java/org/apache/sqoop/model/Configurable.java
new file mode 100644
index 0000000..2033fcb
--- /dev/null
+++ b/common/src/main/java/org/apache/sqoop/model/Configurable.java
@@ -0,0 +1,25 @@
+/**
+ * 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.sqoop.model;
+
+/**
+ * Marker class that identifies the Configurables in the Sqoop system
+ */
+public abstract class Configurable extends MPersistableEntity implements MClonable {
+
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/common/src/main/java/org/apache/sqoop/model/MConfigurableType.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/sqoop/model/MConfigurableType.java b/common/src/main/java/org/apache/sqoop/model/MConfigurableType.java
new file mode 100644
index 0000000..7ab7032
--- /dev/null
+++ b/common/src/main/java/org/apache/sqoop/model/MConfigurableType.java
@@ -0,0 +1,30 @@
+/**
+ * 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.sqoop.model;
+
+/**
+ * Represents the sqoop entities that can own configs
+ */
+public enum MConfigurableType {
+
+  /** Connector as a owner of config keys */
+  CONNECTOR,
+
+  /** Driver as a owner of config keys */
+  DRIVER;
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/common/src/main/java/org/apache/sqoop/model/MConnector.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/sqoop/model/MConnector.java b/common/src/main/java/org/apache/sqoop/model/MConnector.java
index 2f42191..174d0b9 100644
--- a/common/src/main/java/org/apache/sqoop/model/MConnector.java
+++ b/common/src/main/java/org/apache/sqoop/model/MConnector.java
@@ -23,11 +23,11 @@ import org.apache.sqoop.common.SqoopException;
 import org.apache.sqoop.common.SupportedDirections;
 
 /**
- * Connector entity supports the FROM/TO {@link Transferable} Includes unique id
+ * Connector entity supports the FROM/TO {@link  org.apache.sqoop.job.etl.Transfereable} Includes unique id
  * that identifies connector in the repository, unique human readable name,
  * corresponding name and all configs to support the from and to data sources
  */
-public final class MConnector extends MPersistableEntity implements MClonable {
+public final class MConnector extends Configurable {
 
   private final String uniqueName;
   private final String className;

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/common/src/main/java/org/apache/sqoop/model/MDriver.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/sqoop/model/MDriver.java b/common/src/main/java/org/apache/sqoop/model/MDriver.java
index 685439e..4241a31 100644
--- a/common/src/main/java/org/apache/sqoop/model/MDriver.java
+++ b/common/src/main/java/org/apache/sqoop/model/MDriver.java
@@ -22,7 +22,7 @@ import java.sql.Driver;
 /**
  * Describes the configs associated with the {@link Driver} for executing sqoop jobs.
  */
-public class MDriver extends MPersistableEntity implements MClonable {
+public final class MDriver extends Configurable {
 
   private final MDriverConfig driverConfig;
   private final String version;

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/common/src/main/java/org/apache/sqoop/model/MJob.java
----------------------------------------------------------------------
diff --git a/common/src/main/java/org/apache/sqoop/model/MJob.java b/common/src/main/java/org/apache/sqoop/model/MJob.java
index b3dec27..935dd18 100644
--- a/common/src/main/java/org/apache/sqoop/model/MJob.java
+++ b/common/src/main/java/org/apache/sqoop/model/MJob.java
@@ -139,6 +139,14 @@ public class MJob extends MAccountableEntity implements MClonable {
     }
   }
 
+  public long getFromConnectorId() {
+    return fromConnectorId;
+  }
+
+  public long getToConnectorId() {
+    return toConnectorId;
+  }
+
   public MConfigList getJobConfig(Direction type) {
     switch(type) {
       case FROM:

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/connector/connector-generic-jdbc/src/main/java/org/apache/sqoop/connector/jdbc/GenericJdbcConnector.java
----------------------------------------------------------------------
diff --git a/connector/connector-generic-jdbc/src/main/java/org/apache/sqoop/connector/jdbc/GenericJdbcConnector.java b/connector/connector-generic-jdbc/src/main/java/org/apache/sqoop/connector/jdbc/GenericJdbcConnector.java
index 87ac2af..8469064 100644
--- a/connector/connector-generic-jdbc/src/main/java/org/apache/sqoop/connector/jdbc/GenericJdbcConnector.java
+++ b/connector/connector-generic-jdbc/src/main/java/org/apache/sqoop/connector/jdbc/GenericJdbcConnector.java
@@ -25,7 +25,7 @@ import org.apache.sqoop.common.VersionInfo;
 import org.apache.sqoop.connector.jdbc.configuration.LinkConfiguration;
 import org.apache.sqoop.connector.jdbc.configuration.FromJobConfiguration;
 import org.apache.sqoop.connector.jdbc.configuration.ToJobConfiguration;
-import org.apache.sqoop.connector.spi.RepositoryUpgrader;
+import org.apache.sqoop.connector.spi.ConnectorConfigurableUpgrader;
 import org.apache.sqoop.job.etl.From;
 import org.apache.sqoop.job.etl.To;
 import org.apache.sqoop.connector.spi.SqoopConnector;
@@ -97,7 +97,7 @@ public class GenericJdbcConnector extends SqoopConnector {
   }
 
   @Override
-  public RepositoryUpgrader getRepositoryUpgrader() {
+  public ConnectorConfigurableUpgrader getConfigurableUpgrader() {
     return new GenericJdbcConnectorUpgrader();
   }
 

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/connector/connector-generic-jdbc/src/main/java/org/apache/sqoop/connector/jdbc/GenericJdbcConnectorUpgrader.java
----------------------------------------------------------------------
diff --git a/connector/connector-generic-jdbc/src/main/java/org/apache/sqoop/connector/jdbc/GenericJdbcConnectorUpgrader.java b/connector/connector-generic-jdbc/src/main/java/org/apache/sqoop/connector/jdbc/GenericJdbcConnectorUpgrader.java
index a069b3e..fb92a39 100644
--- a/connector/connector-generic-jdbc/src/main/java/org/apache/sqoop/connector/jdbc/GenericJdbcConnectorUpgrader.java
+++ b/connector/connector-generic-jdbc/src/main/java/org/apache/sqoop/connector/jdbc/GenericJdbcConnectorUpgrader.java
@@ -18,64 +18,27 @@
  */
 package org.apache.sqoop.connector.jdbc;
 
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import org.apache.log4j.Logger;
-import org.apache.sqoop.common.SqoopException;
-import org.apache.sqoop.connector.spi.RepositoryUpgrader;
-import org.apache.sqoop.model.MConfigList;
-import org.apache.sqoop.model.MConfig;
-import org.apache.sqoop.model.MInput;
+import org.apache.sqoop.configurable.ConfigurableUpgradeUtil;
+import org.apache.sqoop.connector.spi.ConnectorConfigurableUpgrader;
+import org.apache.sqoop.model.MFromConfig;
 import org.apache.sqoop.model.MLinkConfig;
+import org.apache.sqoop.model.MToConfig;
 
-public class GenericJdbcConnectorUpgrader extends RepositoryUpgrader {
-  private static final Logger LOG = Logger.getLogger(GenericJdbcConnectorUpgrader.class);
-
-  /*
-   * For now, there is no real upgrade. So copy all data over,
-   * set the validation messages and error messages to be the same as for the
-   * inputs in the original one.
-   */
+// NOTE: All config types have the similar upgrade path at this point
+public class GenericJdbcConnectorUpgrader extends ConnectorConfigurableUpgrader {
 
   @Override
-  public void upgrade(MLinkConfig original, MLinkConfig upgradeTarget) {
-    doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
+  public void upgradeLinkConfig(MLinkConfig original, MLinkConfig upgradeTarget) {
+    ConfigurableUpgradeUtil.doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
   }
 
   @Override
-  public void upgrade(MConfigList original, MConfigList upgradeTarget) {
-    doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
+  public void upgradeFromJobConfig(MFromConfig original, MFromConfig upgradeTarget) {
+    ConfigurableUpgradeUtil.doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
   }
 
-  @SuppressWarnings("unchecked")
-  private void doUpgrade(List<MConfig> original, List<MConfig> target) {
-    // Easier to find the config in the original list if we use a map.
-    // Since the constructor takes a list,
-    // index is not guaranteed to be the same, so we need to look for
-    // equivalence
-    Map<String, MConfig> configMap = new HashMap<String, MConfig>();
-    for (MConfig config : original) {
-      configMap.put(config.getName(), config);
-    }
-    for (MConfig config : target) {
-      List<MInput<?>> inputs = config.getInputs();
-      MConfig orginalConfig = configMap.get(config.getName());
-      if (orginalConfig == null) {
-        LOG.warn("Config: '" + config.getName() + "' not present in old " +
-            "generic JDBC connector. So it and its inputs will not be transferred by the upgrader.");
-        continue;
-      }
-      for (MInput input : inputs) {
-        try {
-          MInput originalInput = orginalConfig.getInput(input.getName());
-          input.setValue(originalInput.getValue());
-        } catch (SqoopException ex) {
-          LOG.warn("Input: '" + input.getName() + "' not present in old " +
-            "generic JDBC connector. So it will not be transferred by the upgrader.");
-        }
-      }
-    }
+  @Override
+  public void upgradeToJobConfig(MToConfig original, MToConfig upgradeTarget) {
+    ConfigurableUpgradeUtil.doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
   }
 }

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConfigUpgrader.java
----------------------------------------------------------------------
diff --git a/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConfigUpgrader.java b/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConfigUpgrader.java
deleted file mode 100644
index b17aa21..0000000
--- a/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConfigUpgrader.java
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * 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.sqoop.connector.hdfs;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import org.apache.log4j.Logger;
-import org.apache.sqoop.common.SqoopException;
-import org.apache.sqoop.connector.spi.RepositoryUpgrader;
-import org.apache.sqoop.model.MConfigList;
-import org.apache.sqoop.model.MConfig;
-import org.apache.sqoop.model.MInput;
-import org.apache.sqoop.model.MLinkConfig;
-
-public class HdfsConfigUpgrader extends RepositoryUpgrader {
-  private static final Logger LOG = Logger.getLogger(HdfsConfigUpgrader.class);
-
-  /*
-   * For now, there is no real upgrade. So copy all data over,
-   * set the validation messages and error messages to be the same as for the
-   * inputs in the original one.
-   */
-
-  @Override
-  public void upgrade(MLinkConfig original, MLinkConfig upgradeTarget) {
-    doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
-  }
-
-  @Override
-  public void upgrade(MConfigList original, MConfigList upgradeTarget) {
-    doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
-  }
-
-  @SuppressWarnings("unchecked")
-  private void doUpgrade(List<MConfig> original, List<MConfig> target) {
-    // Easier to find the config in the original list if we use a map.
-    // Since the constructor takes a list,
-    // index is not guaranteed to be the same, so we need to look for
-    // equivalence
-    Map<String, MConfig> configMap = new HashMap<String, MConfig>();
-    for (MConfig config : original) {
-      configMap.put(config.getName(), config);
-    }
-    for (MConfig config : target) {
-      List<MInput<?>> inputs = config.getInputs();
-      MConfig originalConfig = configMap.get(config.getName());
-      if (originalConfig == null) {
-        LOG.warn("Config: '" + config.getName() + "' not present in old " +
-            "connector. So it and its inputs will not be transferred by the upgrader.");
-        continue;
-      }
-      for (MInput input : inputs) {
-        try {
-          MInput originalInput = originalConfig.getInput(input.getName());
-          input.setValue(originalInput.getValue());
-        } catch (SqoopException ex) {
-          LOG.warn("Input: '" + input.getName() + "' not present in old " +
-              "connector. So it will not be transferred by the upgrader.");
-        }
-      }
-    }
-  }
-}

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConnector.java
----------------------------------------------------------------------
diff --git a/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConnector.java b/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConnector.java
index 606b9fa..e63e464 100644
--- a/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConnector.java
+++ b/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConnector.java
@@ -24,7 +24,7 @@ import org.apache.sqoop.common.VersionInfo;
 import org.apache.sqoop.connector.hdfs.configuration.LinkConfiguration;
 import org.apache.sqoop.connector.hdfs.configuration.FromJobConfiguration;
 import org.apache.sqoop.connector.hdfs.configuration.ToJobConfiguration;
-import org.apache.sqoop.connector.spi.RepositoryUpgrader;
+import org.apache.sqoop.connector.spi.ConnectorConfigurableUpgrader;
 import org.apache.sqoop.connector.spi.SqoopConnector;
 import org.apache.sqoop.job.etl.From;
 import org.apache.sqoop.job.etl.To;
@@ -123,13 +123,13 @@ public class HdfsConnector extends SqoopConnector {
   }
 
   /**
-   * Returns an {@linkplain org.apache.sqoop.connector.spi.RepositoryUpgrader} object that can upgrade the
+   * Returns an {@linkplain org.apache.sqoop.connector.spi.ConnectorConfigurableUpgrader} object that can upgrade the
    * connection and job metadata.
    *
    * @return MetadataUpgrader object
    */
   @Override
-  public RepositoryUpgrader getRepositoryUpgrader() {
-    return new HdfsConfigUpgrader();
+  public ConnectorConfigurableUpgrader getConfigurableUpgrader() {
+    return new HdfsConnectorUpgrader();
   }
 }

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConnectorUpgrader.java
----------------------------------------------------------------------
diff --git a/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConnectorUpgrader.java b/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConnectorUpgrader.java
new file mode 100644
index 0000000..14862eb
--- /dev/null
+++ b/connector/connector-hdfs/src/main/java/org/apache/sqoop/connector/hdfs/HdfsConnectorUpgrader.java
@@ -0,0 +1,45 @@
+/*
+ * 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.sqoop.connector.hdfs;
+
+import org.apache.sqoop.configurable.ConfigurableUpgradeUtil;
+import org.apache.sqoop.connector.spi.ConnectorConfigurableUpgrader;
+import org.apache.sqoop.model.MFromConfig;
+import org.apache.sqoop.model.MLinkConfig;
+import org.apache.sqoop.model.MToConfig;
+
+//NOTE: All config types have the similar upgrade path at this point
+public class HdfsConnectorUpgrader extends ConnectorConfigurableUpgrader {
+
+  @Override
+  public void upgradeLinkConfig(MLinkConfig original, MLinkConfig upgradeTarget) {
+    ConfigurableUpgradeUtil.doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
+  }
+
+  @Override
+  public void upgradeFromJobConfig(MFromConfig original, MFromConfig upgradeTarget) {
+    ConfigurableUpgradeUtil.doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
+  }
+
+  @Override
+  public void upgradeToJobConfig(MToConfig original, MToConfig upgradeTarget) {
+    ConfigurableUpgradeUtil.doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/connector/ConnectorHandler.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/connector/ConnectorHandler.java b/core/src/main/java/org/apache/sqoop/connector/ConnectorHandler.java
index 54bdd13..1919b4b 100644
--- a/core/src/main/java/org/apache/sqoop/connector/ConnectorHandler.java
+++ b/core/src/main/java/org/apache/sqoop/connector/ConnectorHandler.java
@@ -43,15 +43,14 @@ public final class ConnectorHandler {
   private final String connectorUniqueName;
   private final SqoopConnector connector;
 
-  private MConnector mConnector;
+  private MConnector connectorConfigurable;
 
   public ConnectorHandler(URL configFileUrl) {
     connectorUrl = configFileUrl.toString();
     try {
       properties.load(configFileUrl.openStream());
     } catch (IOException ex) {
-      throw new SqoopException(ConnectorError.CONN_0003,
-          configFileUrl.toString(), ex);
+      throw new SqoopException(ConnectorError.CONN_0003, configFileUrl.toString(), ex);
     }
 
     LOG.debug("Connector configuration: " + properties);
@@ -64,12 +63,9 @@ public final class ConnectorHandler {
           ConfigurationConstants.CONPROP_PROVIDER_CLASS);
     }
 
+    connectorUniqueName = properties.getProperty(ConfigurationConstants.CONNPROP_CONNECTOR_NAME);
 
-    connectorUniqueName = properties.getProperty(
-        ConfigurationConstants.CONNPROP_CONNECTOR_NAME);
-
-    if (connectorUniqueName == null || connectorUniqueName.trim().length() == 0)
-    {
+    if (connectorUniqueName == null || connectorUniqueName.trim().length() == 0) {
       throw new SqoopException(ConnectorError.CONN_0008, connectorClassName);
     }
 
@@ -103,13 +99,11 @@ public final class ConnectorHandler {
           connector.getJobConfigurationClass(Direction.TO)));
     }
 
-    MLinkConfig connectionForms = new MLinkConfig(
+    MLinkConfig linkConfig = new MLinkConfig(
         ConfigUtils.toConfigs(connector.getLinkConfigurationClass()));
 
-    String connectorVersion = connector.getVersion();
-
-    mConnector = new MConnector(connectorUniqueName, connectorClassName, connectorVersion,
-        connectionForms, fromConfig, toConfig);
+    connectorConfigurable = new MConnector(connectorUniqueName, connectorClassName, connector.getVersion(),
+        linkConfig, fromConfig, toConfig);
 
     if (LOG.isInfoEnabled()) {
       LOG.info("Connector [" + connectorClassName + "] initialized.");
@@ -133,15 +127,15 @@ public final class ConnectorHandler {
     return connectorUrl;
   }
 
-  public MConnector getMetadata() {
-    return mConnector;
+  public MConnector getConnectorConfigurable() {
+    return connectorConfigurable;
   }
 
-  public void setMetadata(MConnector connector) {
-    this.mConnector = connector;
+  public void setConnectorConfigurable(MConnector mConnector) {
+    this.connectorConfigurable = mConnector;
   }
 
-  public SqoopConnector getConnector() {
+  public SqoopConnector getSqoopConnector() {
     return connector;
   }
-}
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/connector/ConnectorManager.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/connector/ConnectorManager.java b/core/src/main/java/org/apache/sqoop/connector/ConnectorManager.java
index 5226926..0369b4d 100644
--- a/core/src/main/java/org/apache/sqoop/connector/ConnectorManager.java
+++ b/core/src/main/java/org/apache/sqoop/connector/ConnectorManager.java
@@ -92,10 +92,10 @@ public class ConnectorManager implements Reconfigurable {
   private Map<String, ConnectorHandler> handlerMap =
       new HashMap<String, ConnectorHandler>();
 
-  public List<MConnector> getConnectorsMetadata() {
+  public List<MConnector> getConnectorConfigurables() {
     List<MConnector> connectors = new LinkedList<MConnector>();
     for(ConnectorHandler handler : handlerMap.values()) {
-      connectors.add(handler.getMetadata());
+      connectors.add(handler.getConnectorConfigurable());
     }
     return connectors;
   }
@@ -107,8 +107,8 @@ public class ConnectorManager implements Reconfigurable {
   public Map<Long, ResourceBundle> getResourceBundles(Locale locale) {
     Map<Long, ResourceBundle> bundles = new HashMap<Long, ResourceBundle>();
     for(ConnectorHandler handler : handlerMap.values()) {
-      long id = handler.getMetadata().getPersistenceId();
-      ResourceBundle bundle = handler.getConnector().getBundle(locale);
+      long id = handler.getConnectorConfigurable().getPersistenceId();
+      ResourceBundle bundle = handler.getSqoopConnector().getBundle(locale);
       bundles.put(id, bundle);
     }
     return bundles;
@@ -116,25 +116,24 @@ public class ConnectorManager implements Reconfigurable {
 
   public ResourceBundle getResourceBundle(long connectorId, Locale locale) {
     ConnectorHandler handler = handlerMap.get(nameMap.get(connectorId));
-    return handler.getConnector().getBundle(locale);
+    return handler.getSqoopConnector().getBundle(locale);
   }
 
-  public MConnector getConnectorConfig(long connectorId) {
+  public MConnector getConnectorConfigurable(long connectorId) {
     ConnectorHandler handler = handlerMap.get(nameMap.get(connectorId));
     if(handler == null) {
       return null;
     }
-
-    return handler.getMetadata();
+    return handler.getConnectorConfigurable();
   }
 
-  public SqoopConnector getConnector(long connectorId) {
+  public SqoopConnector getSqoopConnector(long connectorId) {
     ConnectorHandler handler = handlerMap.get(nameMap.get(connectorId));
-    return handler.getConnector();
+    return handler.getSqoopConnector();
   }
 
-  public SqoopConnector getConnector(String uniqueName) {
-    return handlerMap.get(uniqueName).getConnector();
+  public SqoopConnector getSqoopConnector(String uniqueName) {
+    return handlerMap.get(uniqueName).getSqoopConnector();
   }
 
   public synchronized void initialize() {
@@ -182,21 +181,21 @@ public class ConnectorManager implements Reconfigurable {
       rtx.begin();
       for (String name : handlerMap.keySet()) {
         ConnectorHandler handler = handlerMap.get(name);
-        MConnector connectorMetadata = handler.getMetadata();
+        MConnector connectorMetadata = handler.getConnectorConfigurable();
         MConnector registeredMetadata =
             repository.registerConnector(connectorMetadata, autoUpgrade);
 
         // Set registered metadata instead of connector metadata as they will
         // have filled persistent ids. We should be confident at this point that
         // there are no differences between those two structures.
-        handler.setMetadata(registeredMetadata);
+        handler.setConnectorConfigurable(registeredMetadata);
 
         String connectorName = handler.getUniqueName();
-        if (!handler.getMetadata().hasPersistenceId()) {
+        if (!handler.getConnectorConfigurable().hasPersistenceId()) {
           throw new SqoopException(ConnectorError.CONN_0010, connectorName);
         }
-        nameMap.put(handler.getMetadata().getPersistenceId(), connectorName);
-        LOG.debug("Registered connector: " + handler.getMetadata());
+        nameMap.put(handler.getConnectorConfigurable().getPersistenceId(), connectorName);
+        LOG.debug("Registered connector: " + handler.getConnectorConfigurable());
       }
       rtx.commit();
     } catch (Exception ex) {

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/driver/Driver.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/driver/Driver.java b/core/src/main/java/org/apache/sqoop/driver/Driver.java
index f1b45bb..46a16ac 100644
--- a/core/src/main/java/org/apache/sqoop/driver/Driver.java
+++ b/core/src/main/java/org/apache/sqoop/driver/Driver.java
@@ -22,12 +22,11 @@ import java.util.Locale;
 import java.util.ResourceBundle;
 
 import org.apache.log4j.Logger;
-import org.apache.sqoop.connector.spi.RepositoryUpgrader;
 import org.apache.sqoop.core.ConfigurationConstants;
 import org.apache.sqoop.core.Reconfigurable;
 import org.apache.sqoop.core.SqoopConfiguration;
 import org.apache.sqoop.core.SqoopConfiguration.CoreConfigurationListener;
-import org.apache.sqoop.driver.configuration.DriverConfiguration;
+import org.apache.sqoop.driver.configuration.JobConfiguration;
 import org.apache.sqoop.json.DriverBean;
 import org.apache.sqoop.model.ConfigUtils;
 import org.apache.sqoop.model.MConfig;
@@ -105,25 +104,26 @@ public class Driver implements Reconfigurable {
   /**
    * Driver config upgrader instance
    */
-  private final RepositoryUpgrader driverConfigUpgrader;
+  private final DriverUpgrader driverUpgrader;
 
   /**
    * Default driver config auto upgrade option value
    */
   private static final boolean DEFAULT_AUTO_UPGRADE = false;
 
-  public Class getDriverConfigurationGroupClass() {
-      return DriverConfiguration.class;
+  @SuppressWarnings("rawtypes")
+  public Class getDriverJobConfigurationClass() {
+      return JobConfiguration.class;
   }
 
   public Driver() {
-    List<MConfig> driverConfig = ConfigUtils.toConfigs(getDriverConfigurationGroupClass());
+    List<MConfig> driverConfig = ConfigUtils.toConfigs(getDriverJobConfigurationClass());
     mDriver = new MDriver(new MDriverConfig(driverConfig), DriverBean.CURRENT_DRIVER_VERSION);
 
     // Build validator
     driverValidator = new DriverConfigValidator();
     // Build upgrader
-    driverConfigUpgrader = new DriverConfigUpgrader();
+    driverUpgrader = new DriverUpgrader();
   }
 
   public synchronized void initialize() {
@@ -150,8 +150,8 @@ public class Driver implements Reconfigurable {
     return driverValidator;
   }
 
-  public RepositoryUpgrader getDriverConfigRepositoryUpgrader() {
-    return driverConfigUpgrader;
+  public DriverUpgrader getConfigurableUpgrader() {
+    return driverUpgrader;
   }
 
   public MDriver getDriver() {

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/driver/DriverConfigUpgrader.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/driver/DriverConfigUpgrader.java b/core/src/main/java/org/apache/sqoop/driver/DriverConfigUpgrader.java
deleted file mode 100644
index 847b73d..0000000
--- a/core/src/main/java/org/apache/sqoop/driver/DriverConfigUpgrader.java
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * 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.sqoop.driver;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import org.apache.log4j.Logger;
-import org.apache.sqoop.common.SqoopException;
-import org.apache.sqoop.connector.spi.RepositoryUpgrader;
-import org.apache.sqoop.model.MConfigList;
-import org.apache.sqoop.model.MConfig;
-import org.apache.sqoop.model.MInput;
-import org.apache.sqoop.model.MLinkConfig;
-
-public class DriverConfigUpgrader extends RepositoryUpgrader{
-
-  private static final Logger LOG = Logger.getLogger(DriverConfigUpgrader.class);
-
-  @Override
-  public void upgrade(MLinkConfig original, MLinkConfig upgradeTarget) {
-    // NOTE(VB): There are no link configs anymore for driver, this code remains for previous versions
-  }
-
-  @Override
-  public void upgrade(MConfigList original, MConfigList upgradeTarget) {
-    doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
-  }
-
-  @SuppressWarnings("unchecked")
-  private void doUpgrade(List<MConfig> original, List<MConfig> target) {
-    // Easier to find the config in the original list if we use a map.
-    // Since the constructor takes a list,
-    // index is not guaranteed to be the same, so we need to look for
-    // equivalence
-    Map<String, MConfig> configMap = new HashMap<String, MConfig>();
-    for (MConfig config : original) {
-      configMap.put(config.getName(), config);
-    }
-    for (MConfig config : target) {
-      List<MInput<?>> inputs = config.getInputs();
-      MConfig originalConfig = configMap.get(config.getName());
-      if(originalConfig == null) {
-        LOG.warn("Config: " + config.getName() + " not present in old " +
-          "driver config. So it will not be transferred by the upgrader.");
-        continue;
-      }
-
-      for (MInput input : inputs) {
-        try {
-          MInput originalInput = originalConfig.getInput(input.getName());
-          input.setValue(originalInput.getValue());
-        } catch (SqoopException ex) {
-          LOG.warn("Input: " + input.getName() + " not present in old " +
-            "driver config. So it will not be transferred by the upgrader.");
-        }
-      }
-    }
-  }
-}

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/driver/DriverConfigValidator.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/driver/DriverConfigValidator.java b/core/src/main/java/org/apache/sqoop/driver/DriverConfigValidator.java
index 9c3b660..0d9a9b8 100644
--- a/core/src/main/java/org/apache/sqoop/driver/DriverConfigValidator.java
+++ b/core/src/main/java/org/apache/sqoop/driver/DriverConfigValidator.java
@@ -17,7 +17,7 @@
  */
 package org.apache.sqoop.driver;
 
-import org.apache.sqoop.driver.configuration.DriverConfiguration;
+import org.apache.sqoop.driver.configuration.JobConfiguration;
 import org.apache.sqoop.driver.configuration.ThrottlingConfig;
 import org.apache.sqoop.validation.Status;
 import org.apache.sqoop.validation.ConfigValidator;
@@ -26,8 +26,8 @@ import org.apache.sqoop.validation.Validator;
 public class DriverConfigValidator extends Validator {
   @Override
   public ConfigValidator validateConfigForJob(Object jobConfiguration) {
-    ConfigValidator validation = new ConfigValidator(DriverConfiguration.class);
-    DriverConfiguration conf = (DriverConfiguration)jobConfiguration;
+    ConfigValidator validation = new ConfigValidator(JobConfiguration.class);
+    JobConfiguration conf = (JobConfiguration)jobConfiguration;
     validateThrottlingConfig(validation,conf.throttlingConfig);
 
     return validation;

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/driver/DriverUpgrader.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/driver/DriverUpgrader.java b/core/src/main/java/org/apache/sqoop/driver/DriverUpgrader.java
new file mode 100644
index 0000000..b880d3b
--- /dev/null
+++ b/core/src/main/java/org/apache/sqoop/driver/DriverUpgrader.java
@@ -0,0 +1,29 @@
+/*
+ * 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.sqoop.driver;
+
+import org.apache.sqoop.configurable.ConfigurableUpgradeUtil;
+import org.apache.sqoop.model.MDriverConfig;
+
+public class DriverUpgrader {
+
+  public void upgradeJobConfig(MDriverConfig original, MDriverConfig upgradeTarget) {
+    ConfigurableUpgradeUtil.doUpgrade(original.getConfigs(), upgradeTarget.getConfigs());
+  }
+}

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/driver/JobManager.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/driver/JobManager.java b/core/src/main/java/org/apache/sqoop/driver/JobManager.java
index df2a5ab..51e562c 100644
--- a/core/src/main/java/org/apache/sqoop/driver/JobManager.java
+++ b/core/src/main/java/org/apache/sqoop/driver/JobManager.java
@@ -30,7 +30,7 @@ import org.apache.sqoop.connector.spi.SqoopConnector;
 import org.apache.sqoop.core.Reconfigurable;
 import org.apache.sqoop.core.SqoopConfiguration;
 import org.apache.sqoop.core.SqoopConfiguration.CoreConfigurationListener;
-import org.apache.sqoop.driver.configuration.DriverConfiguration;
+import org.apache.sqoop.driver.configuration.JobConfiguration;
 import org.apache.sqoop.job.etl.Destroyer;
 import org.apache.sqoop.job.etl.DestroyerContext;
 import org.apache.sqoop.job.etl.Initializer;
@@ -306,9 +306,9 @@ public class JobManager implements Reconfigurable {
     MLink toConnection = getLink(job.getLinkId(Direction.TO));
 
     // get from/to connectors for the connection
-    SqoopConnector fromConnector = getConnector(fromConnection.getConnectorId());
+    SqoopConnector fromConnector = getSqoopConnector(fromConnection.getConnectorId());
     validateSupportedDirection(fromConnector, Direction.FROM);
-    SqoopConnector toConnector = getConnector(toConnection.getConnectorId());
+    SqoopConnector toConnector = getSqoopConnector(toConnection.getConnectorId());
     validateSupportedDirection(toConnector, Direction.TO);
 
     // link config for the FROM part of the job
@@ -329,7 +329,7 @@ public class JobManager implements Reconfigurable {
 
     // the only driver config for the job
     Object driverConfig = ClassUtils
-        .instantiate(Driver.getInstance().getDriverConfigurationGroupClass());
+        .instantiate(Driver.getInstance().getDriverJobConfigurationClass());
     ConfigUtils.fromConfigs(job.getDriverConfig().getConfigs(), driverConfig);
 
 
@@ -402,8 +402,8 @@ public class JobManager implements Reconfigurable {
     return summary;
   }
 
-  SqoopConnector getConnector(long connnectorId) {
-    return ConnectorManager.getInstance().getConnector(connnectorId);
+  SqoopConnector getSqoopConnector(long connnectorId) {
+    return ConnectorManager.getInstance().getSqoopConnector(connnectorId);
   }
 
   void validateSupportedDirection(SqoopConnector connector, Direction direction) {
@@ -480,7 +480,7 @@ public class JobManager implements Reconfigurable {
   }
 
   void prepareJob(JobRequest request) {
-    DriverConfiguration jobConfiguration = (DriverConfiguration) request.getDriverConfig();
+    JobConfiguration jobConfiguration = (JobConfiguration) request.getDriverConfig();
     // We're directly moving configured number of extractors and loaders to
     // underlying request object. In the future we might need to throttle this
     // count based on other running jobs to meet our SLAs.

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/driver/configuration/DriverConfiguration.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/driver/configuration/DriverConfiguration.java b/core/src/main/java/org/apache/sqoop/driver/configuration/DriverConfiguration.java
deleted file mode 100644
index d4e2254..0000000
--- a/core/src/main/java/org/apache/sqoop/driver/configuration/DriverConfiguration.java
+++ /dev/null
@@ -1,34 +0,0 @@
-/**
- * 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.sqoop.driver.configuration;
-
-import org.apache.sqoop.model.ConfigurationClass;
-import org.apache.sqoop.model.Config;
-
-/**
- * Representing the core job configuration
- */
-@ConfigurationClass
-public class DriverConfiguration {
-  @Config
-  public ThrottlingConfig throttlingConfig;
-
-  public DriverConfiguration() {
-    throttlingConfig = new ThrottlingConfig();
-  }
-}

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/driver/configuration/JobConfiguration.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/driver/configuration/JobConfiguration.java b/core/src/main/java/org/apache/sqoop/driver/configuration/JobConfiguration.java
new file mode 100644
index 0000000..bf1328a
--- /dev/null
+++ b/core/src/main/java/org/apache/sqoop/driver/configuration/JobConfiguration.java
@@ -0,0 +1,34 @@
+/**
+ * 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.sqoop.driver.configuration;
+
+import org.apache.sqoop.model.ConfigurationClass;
+import org.apache.sqoop.model.Config;
+
+/**
+ * Representing the driver job configuration
+ */
+@ConfigurationClass
+public class JobConfiguration {
+  @Config
+  public ThrottlingConfig throttlingConfig;
+
+  public JobConfiguration() {
+    throttlingConfig = new ThrottlingConfig();
+  }
+}

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/repository/JdbcRepository.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/repository/JdbcRepository.java b/core/src/main/java/org/apache/sqoop/repository/JdbcRepository.java
index f06fd0c..476830d 100644
--- a/core/src/main/java/org/apache/sqoop/repository/JdbcRepository.java
+++ b/core/src/main/java/org/apache/sqoop/repository/JdbcRepository.java
@@ -163,10 +163,6 @@ public class JdbcRepository extends Repository {
           handler.registerConnector(mConnector, conn);
           return mConnector;
         } else {
-          // Same connector, check if the version is the same.
-          // For now, use the "string" versions itself - later we should
-          // probably include a build number or something that is
-          // monotonically increasing.
           if (connectorResult.getUniqueName().equals(mConnector.getUniqueName()) &&
             mConnector.getVersion().compareTo(connectorResult.getVersion()) > 0) {
             if (autoUpgrade) {
@@ -652,23 +648,23 @@ public class JdbcRepository extends Repository {
    * {@inheritDoc}
    */
   @Override
-  protected void upgradeConnector(final MConnector newConnector,
+  protected void upgradeConnectorConfigs(final MConnector newConnector,
     RepositoryTransaction tx) {
     doWithConnection(new DoWithConnection() {
       @Override
       public Object doIt(Connection conn) throws Exception {
-        handler.upgradeConnector(newConnector, conn);
+        handler.upgradeConnectorConfigs(newConnector, conn);
         return null;
       }
     }, (JdbcRepositoryTransaction) tx);
   }
 
 
-  protected void upgradeDriver(final MDriver mDriver, RepositoryTransaction tx) {
+  protected void upgradeDriverConfigs(final MDriver mDriver, RepositoryTransaction tx) {
     doWithConnection(new DoWithConnection() {
       @Override
       public Object doIt(Connection conn) throws Exception {
-        handler.upgradeDriver(mDriver, conn);
+        handler.upgradeDriverConfigs(mDriver, conn);
         return null;
       }
     }, (JdbcRepositoryTransaction) tx);

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/repository/JdbcRepositoryHandler.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/repository/JdbcRepositoryHandler.java b/core/src/main/java/org/apache/sqoop/repository/JdbcRepositoryHandler.java
index 5a8e026..4c5229f 100644
--- a/core/src/main/java/org/apache/sqoop/repository/JdbcRepositoryHandler.java
+++ b/core/src/main/java/org/apache/sqoop/repository/JdbcRepositoryHandler.java
@@ -101,7 +101,7 @@ public abstract class JdbcRepositoryHandler {
    * @param conn JDBC link for querying repository
    */
 
-  public abstract void upgradeConnector(MConnector mConnector, Connection conn);
+  public abstract void upgradeConnectorConfigs(MConnector mConnector, Connection conn);
 
 
   /**
@@ -117,7 +117,7 @@ public abstract class JdbcRepositoryHandler {
    *                     the driverConfig.
    * @param conn JDBC link for querying repository
    */
-  public abstract void upgradeDriver(MDriver mDriver, Connection conn);
+  public abstract void upgradeDriverConfigs(MDriver mDriver, Connection conn);
 
 
   /**

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/main/java/org/apache/sqoop/repository/Repository.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/sqoop/repository/Repository.java b/core/src/main/java/org/apache/sqoop/repository/Repository.java
index 74a9e12..8f78052 100644
--- a/core/src/main/java/org/apache/sqoop/repository/Repository.java
+++ b/core/src/main/java/org/apache/sqoop/repository/Repository.java
@@ -22,12 +22,12 @@ import java.util.List;
 import java.util.Map;
 
 import org.apache.log4j.Logger;
-import org.apache.sqoop.common.Direction;
 import org.apache.sqoop.common.SqoopException;
 import org.apache.sqoop.connector.ConnectorManager;
-import org.apache.sqoop.connector.spi.RepositoryUpgrader;
+import org.apache.sqoop.connector.spi.ConnectorConfigurableUpgrader;
 import org.apache.sqoop.connector.spi.SqoopConnector;
 import org.apache.sqoop.driver.Driver;
+import org.apache.sqoop.driver.DriverUpgrader;
 import org.apache.sqoop.json.DriverBean;
 import org.apache.sqoop.model.ConfigUtils;
 import org.apache.sqoop.model.MConfig;
@@ -317,7 +317,7 @@ public abstract class Repository {
    *           method will not call begin, commit,
    *           rollback or close on this transaction.
    */
-  protected abstract void upgradeConnector(MConnector newConnector, RepositoryTransaction tx);
+  protected abstract void upgradeConnectorConfigs(MConnector newConnector, RepositoryTransaction tx);
 
   /**
    * Upgrade the driver with the new data supplied in the
@@ -335,7 +335,7 @@ public abstract class Repository {
    *           method will not call begin, commit,
    *           rollback or close on this transaction.
    */
-  protected abstract void upgradeDriver(MDriver newDriver, RepositoryTransaction tx);
+  protected abstract void upgradeDriverConfigs(MDriver newDriver, RepositoryTransaction tx);
 
   /**
    * Delete all inputs for a job
@@ -388,84 +388,88 @@ public abstract class Repository {
     LOG.info("Upgrading connector: " + oldConnector.getUniqueName());
     long connectorID = oldConnector.getPersistenceId();
     newConnector.setPersistenceId(connectorID);
-    /* Algorithms:
-     * 1. Get an upgrader for the connector.
-     * 2. Get all links associated with the connector.
-     * 3. Get all jobs associated with the connector.
-     * 4. Delete the inputs for all of the jobs and links (in that order)
-     * 5. Remove all inputs and configs associated with the connector, and
-     *    register the new configs and inputs.
-     * 6. Create new links and jobs with connector part being the ones
-     *    returned by the upgrader.
-     * 7. Validate new links and jobs with connector's validator
-     * 8. If any invalid links or jobs detected, throw an exception
-     *    and stop the bootup of Sqoop server
-     * 9. Otherwise, Insert the link inputs followed by job inputs (using
-     *    updateJob and updatelink)
-     */
+
     RepositoryTransaction tx = null;
     try {
-      SqoopConnector connector =
-        ConnectorManager.getInstance().getConnector(newConnector
-          .getUniqueName());
+      SqoopConnector connector = ConnectorManager.getInstance().getSqoopConnector(
+          newConnector.getUniqueName());
 
       Validator connectorConfigValidator = connector.getConfigValidator();
       boolean upgradeSuccessful = true;
-      RepositoryUpgrader upgrader = connector.getRepositoryUpgrader();
-      List<MLink> linksByConnector = findLinksForConnector(connectorID);
-      List<MJob> jobsByConnector = findJobsForConnector(connectorID);
+      // 1. Get an upgrader for the connector
+      ConnectorConfigurableUpgrader upgrader = connector.getConfigurableUpgrader();
+      // 2. Get all links associated with the connector.
+      List<MLink> existingLinksByConnector = findLinksForConnector(connectorID);
+      // 3. Get all jobs associated with the connector.
+      List<MJob> existingJobsByConnector = findJobsForConnector(connectorID);
       // -- BEGIN TXN --
       tx = getTransaction();
       tx.begin();
-      deletelinksAndJobs(linksByConnector, jobsByConnector, tx);
-      upgradeConnector(newConnector, tx);
-      for (MLink oldLink : linksByConnector) {
-        // Make a new copy of the configs
-        List<MConfig> linkConfig = newConnector.getLinkConfig().clone(false).getConfigs();
-        MLinkConfig newLinkConfig = new MLinkConfig(linkConfig);
-        MLinkConfig oldLinkConfig = oldLink.getConnectorLinkConfig();
-        upgrader.upgrade(oldLinkConfig, newLinkConfig);
-
-        MLink newlink = new MLink(oldLink, newLinkConfig);
-
-        Object newConfigurationObject = ClassUtils.instantiate(connector.getLinkConfigurationClass());
-        ConfigUtils.fromConfigs(newlink.getConnectorLinkConfig().getConfigs(), newConfigurationObject);
-
-        ConfigValidator configValidator = connectorConfigValidator.validateConfigForLink(newConfigurationObject);
-        if (configValidator.getStatus().canProceed()) {
-          updateLink(newlink, tx);
-        } else {
-          logInvalidModelObject("link", newlink, configValidator);
-          upgradeSuccessful = false;
+      // 4. Delete the inputs for all of the jobs and links (in that order) for
+      // this connector
+      deletelinksAndJobs(existingLinksByConnector, existingJobsByConnector, tx);
+      // 5. Delete all inputs and configs associated with the connector, and
+      // insert the new configs and inputs for this connector
+      upgradeConnectorConfigs(newConnector, tx);
+      // 6. Run upgrade logic for the configs related to the link objects
+      // dont always rely on the repository implementation to return empty list for links
+      if (existingLinksByConnector != null) {
+        for (MLink link : existingLinksByConnector) {
+          // Make a new copy of the configs
+          List<MConfig> linkConfig = newConnector.getLinkConfig().clone(false).getConfigs();
+          MLinkConfig newLinkConfig = new MLinkConfig(linkConfig);
+          MLinkConfig oldLinkConfig = link.getConnectorLinkConfig();
+          upgrader.upgradeLinkConfig(oldLinkConfig, newLinkConfig);
+          MLink newlink = new MLink(link, newLinkConfig);
+
+          Object newConfigurationObject = ClassUtils.instantiate(connector
+              .getLinkConfigurationClass());
+          ConfigUtils.fromConfigs(newlink.getConnectorLinkConfig().getConfigs(),
+              newConfigurationObject);
+          // 7. Run link config validation
+          ConfigValidator configValidator = connectorConfigValidator
+              .validateConfigForLink(newConfigurationObject);
+          if (configValidator.getStatus().canProceed()) {
+            updateLink(newlink, tx);
+          } else {
+            // If any invalid links or jobs detected, throw an exception
+            // and stop the bootup of Sqoop server
+            logInvalidModelObject("link", newlink, configValidator);
+            upgradeSuccessful = false;
+          }
         }
       }
-      for (MJob job : jobsByConnector) {
-        // Make a new copy of the configs
-        // else the values will get set in the configs in the connector for
-        // each job.
-        List<MConfig> fromConfig = newConnector.getConfig(Direction.FROM).clone(false).getConfigs();
-        List<MConfig> toConfig = newConnector.getConfig(Direction.TO).clone(false).getConfigs();
-
-        // New FROM direction configs, old TO direction configs.
-        if (job.getConnectorId(Direction.FROM) == newConnector.getPersistenceId()) {
-          MFromConfig newFromConfig = new MFromConfig(fromConfig);
-          MFromConfig oldFromCOnfig = job.getFromJobConfig();
-          upgrader.upgrade(oldFromCOnfig, newFromConfig);
-
-          MToConfig oldToConfig = job.getToJobConfig();
-          MJob newJob = new MJob(job, newFromConfig, oldToConfig, job.getDriverConfig());
-          updateJob(newJob, tx);
-        }
-
-        // Old FROM direction configs, new TO direction configs.
-        if (job.getConnectorId(Direction.TO) == newConnector.getPersistenceId()) {
-
-          MToConfig oldToConfig = job.getToJobConfig();
-          MToConfig newToConfig = new MToConfig(toConfig);
-          upgrader.upgrade(oldToConfig, newToConfig);
-          MFromConfig oldFromConfig = job.getFromJobConfig();
-          MJob newJob = new MJob(job, oldFromConfig, newToConfig, job.getDriverConfig());
-          updateJob(newJob, tx);
+      // 8. Run upgrade logic for the configs related to the job objects
+      if (existingJobsByConnector != null) {
+        for (MJob job : existingJobsByConnector) {
+          // every job has 2 parts, the FROM and the TO links and their
+          // corresponding connectors.
+          List<MConfig> fromConfig = newConnector.getFromConfig().clone(false).getConfigs();
+          if (job.getFromConnectorId() == newConnector.getPersistenceId()) {
+            MFromConfig newFromConfig = new MFromConfig(fromConfig);
+            MFromConfig oldFromCOnfig = job.getFromJobConfig();
+            upgrader.upgradeFromJobConfig(oldFromCOnfig, newFromConfig);
+            MToConfig oldToConfig = job.getToJobConfig();
+            // create a job with new FROM direction configs but old TO direction
+            // configs
+            MJob newJob = new MJob(job, newFromConfig, oldToConfig, job.getDriverConfig());
+            // TODO( jarcec) : will add the job config validation logic similar
+            // to the link config validation before updating job
+            updateJob(newJob, tx);
+          }
+          List<MConfig> toConfig = newConnector.getToConfig().clone(false).getConfigs();
+          if (job.getToConnectorId() == newConnector.getPersistenceId()) {
+            MToConfig oldToConfig = job.getToJobConfig();
+            MToConfig newToConfig = new MToConfig(toConfig);
+            upgrader.upgradeToJobConfig(oldToConfig, newToConfig);
+            MFromConfig oldFromConfig = job.getFromJobConfig();
+            // create a job with old FROM direction configs but new TO direction
+            // configs
+            MJob newJob = new MJob(job, oldFromConfig, newToConfig, job.getDriverConfig());
+            // TODO( jarcec) : will add the job config validation logic similar
+            // to the link config validation before updating job
+            updateJob(newJob, tx);
+          }
         }
       }
 
@@ -475,20 +479,20 @@ public abstract class Repository {
         throw new SqoopException(RepositoryError.JDBCREPO_0027);
       }
     } catch (SqoopException ex) {
-      if(tx != null) {
+      if (tx != null) {
         tx.rollback();
       }
       throw ex;
     } catch (Exception ex) {
-      if(tx != null) {
+      if (tx != null) {
         tx.rollback();
       }
       throw new SqoopException(RepositoryError.JDBCREPO_0000, ex);
     } finally {
-      if(tx != null) {
+      if (tx != null) {
         tx.close();
       }
-      LOG.info("Metadata upgrade finished for connector: " + oldConnector.getUniqueName());
+      LOG.info("Connector upgrade finished: " + oldConnector.getUniqueName());
     }
   }
 
@@ -496,31 +500,38 @@ public abstract class Repository {
     LOG.info("Upgrading driver");
     RepositoryTransaction tx = null;
     try {
-      RepositoryUpgrader upgrader = Driver.getInstance().getDriverConfigRepositoryUpgrader();
-      List<MJob> jobs = findJobs();
-
+      //1. find upgrader
+      DriverUpgrader upgrader = Driver.getInstance().getConfigurableUpgrader();
+      //2. find all jobs in the system
+      List<MJob> existingJobs = findJobs();
       Validator validator = Driver.getInstance().getValidator();
       boolean upgradeSuccessful = true;
 
       // -- BEGIN TXN --
       tx = getTransaction();
       tx.begin();
-      deleteJobs(jobs, tx);
-      upgradeDriver(driver, tx);
+      //3. delete all jobs in the system
+      deleteJobs(existingJobs, tx);
+      // 4. Delete all inputs and configs associated with the driver, and
+      // insert the new configs and inputs for this driver
+      upgradeDriverConfigs(driver, tx);
 
-      for (MJob job : jobs) {
+      for (MJob job : existingJobs) {
         // Make a new copy of the configs
         MDriverConfig driverConfig = driver.getDriverConfig().clone(false);
         MDriver newDriver = new MDriver(driverConfig, DriverBean.CURRENT_DRIVER_VERSION);
-        upgrader.upgrade(job.getDriverConfig(), newDriver.getDriverConfig());
+        // At this point, the driver only supports JOB config type
+        upgrader.upgradeJobConfig(job.getDriverConfig(), newDriver.getDriverConfig());
+        // create a new job with old FROM and TO configs but new driver configs
         MJob newJob = new MJob(job, job.getFromJobConfig(), job.getToJobConfig(), newDriver.getDriverConfig());
 
-        // Transform config structures to objects for validations
-        Object newConfigurationObject = ClassUtils.instantiate(Driver.getInstance().getDriverConfigurationGroupClass());
+        Object newConfigurationObject = ClassUtils.instantiate(Driver.getInstance().getDriverJobConfigurationClass());
         ConfigUtils.fromConfigs(newJob.getDriverConfig().getConfigs(), newConfigurationObject);
 
+        // 5. validate configs
         ConfigValidator validation = validator.validateConfigForJob(newConfigurationObject);
         if (validation.getStatus().canProceed()) {
+          // 6. update job
           updateJob(newJob, tx);
         } else {
           logInvalidModelObject("job", newJob, validation);

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/test/java/org/apache/sqoop/driver/TestDriverConfigUpgrader.java
----------------------------------------------------------------------
diff --git a/core/src/test/java/org/apache/sqoop/driver/TestDriverConfigUpgrader.java b/core/src/test/java/org/apache/sqoop/driver/TestDriverConfigUpgrader.java
index dc4e8c8..e5201fc 100644
--- a/core/src/test/java/org/apache/sqoop/driver/TestDriverConfigUpgrader.java
+++ b/core/src/test/java/org/apache/sqoop/driver/TestDriverConfigUpgrader.java
@@ -26,6 +26,7 @@ import java.util.List;
 
 import org.apache.sqoop.model.MConfig;
 import org.apache.sqoop.model.MConfigList;
+import org.apache.sqoop.model.MDriverConfig;
 import org.apache.sqoop.model.MInput;
 import org.apache.sqoop.model.MIntegerInput;
 import org.apache.sqoop.model.MStringInput;
@@ -36,30 +37,31 @@ import org.junit.Test;
  */
 public class TestDriverConfigUpgrader {
 
-  DriverConfigUpgrader upgrader;
+  DriverUpgrader upgrader;
 
   @Before
   public void initializeUpgrader() {
-    upgrader = new DriverConfigUpgrader();
+    upgrader = new DriverUpgrader();
   }
+
   /**
-   * We take the same configs on input and output and we
-   * expect that all values will be correctly transferred.
+   * We take the same configs on input and output and we expect that all values
+   * will be correctly transferred.
    */
   @Test
   public void testJobConfigTyeUpgrade() {
-    MConfigList original = job();
-    MConfigList target = job();
+    MDriverConfig original = job();
+    MDriverConfig target = job();
 
     original.getStringInput("f1.s1").setValue("A");
     original.getStringInput("f1.s2").setValue("B");
     original.getIntegerInput("f1.i").setValue(3);
 
-    upgrader.upgrade(original, target);
+    upgrader.upgradeJobConfig(original, target);
 
     assertEquals("A", target.getStringInput("f1.s1").getValue());
     assertEquals("B", target.getStringInput("f1.s2").getValue());
-    assertEquals(3, (long)target.getIntegerInput("f1.i").getValue());
+    assertEquals(3, (long) target.getIntegerInput("f1.i").getValue());
   }
 
   /**
@@ -67,54 +69,54 @@ public class TestDriverConfigUpgrader {
    */
   @Test
   public void testNonExistingInput() {
-    MConfigList original = job1();
-    MConfigList target = job2();
+    MDriverConfig original = job1();
+    MDriverConfig target = job2();
 
     original.getStringInput("f1.s1").setValue("A");
     original.getStringInput("f1.s2").setValue("B");
     original.getIntegerInput("f1.i").setValue(3);
 
-    upgrader.upgrade(original, target);
+    upgrader.upgradeJobConfig(original, target);
 
     assertEquals("A", target.getStringInput("f1.s1").getValue());
     assertNull(target.getStringInput("f1.s2_").getValue());
-    assertEquals(3, (long)target.getIntegerInput("f1.i").getValue());
+    assertEquals(3, (long) target.getIntegerInput("f1.i").getValue());
   }
 
   /**
-   * Upgrade scenario when entire has been added in the target and
-   * therefore is missing in the original.
+   * Upgrade scenario when entire has been added in the target and therefore is
+   * missing in the original.
    */
   @Test
   public void testNonExistingConfig() {
-    MConfigList original = job1();
-    MConfigList target = job3();
+    MDriverConfig original = job1();
+    MDriverConfig target = job3();
 
     original.getStringInput("f1.s1").setValue("A");
     original.getStringInput("f1.s2").setValue("B");
     original.getIntegerInput("f1.i").setValue(3);
 
-    upgrader.upgrade(original, target);
+    upgrader.upgradeJobConfig(original, target);
 
     assertNull(target.getStringInput("f2.s1").getValue());
     assertNull(target.getStringInput("f2.s2").getValue());
     assertNull(target.getIntegerInput("f2.i").getValue());
   }
 
-  MConfigList job() {
-    return new MConfigList(configs1());
+  MDriverConfig job() {
+    return new MDriverConfig(configs1());
   }
 
-  MConfigList job1() {
-    return new MConfigList(configs1());
+  MDriverConfig job1() {
+    return new MDriverConfig(configs1());
   }
 
-  MConfigList job2() {
-    return new MConfigList(configs2());
+  MDriverConfig job2() {
+    return new MDriverConfig(configs2());
   }
 
-  MConfigList job3() {
-    return new MConfigList(configs3());
+  MDriverConfig job3() {
+    return new MDriverConfig(configs3());
   }
 
   List<MConfig> configs1() {
@@ -125,8 +127,8 @@ public class TestDriverConfigUpgrader {
 
   List<MInput<?>> inputs1(String formName) {
     List<MInput<?>> list = new LinkedList<MInput<?>>();
-    list.add(new MStringInput(formName + ".s1", false, (short)30));
-    list.add(new MStringInput(formName + ".s2", false, (short)30));
+    list.add(new MStringInput(formName + ".s1", false, (short) 30));
+    list.add(new MStringInput(formName + ".s2", false, (short) 30));
     list.add(new MIntegerInput(formName + ".i", false));
     return list;
   }
@@ -139,8 +141,8 @@ public class TestDriverConfigUpgrader {
 
   List<MInput<?>> inputs2(String formName) {
     List<MInput<?>> list = new LinkedList<MInput<?>>();
-    list.add(new MStringInput(formName + ".s1", false, (short)30));
-    list.add(new MStringInput(formName + ".s2_", false, (short)30));
+    list.add(new MStringInput(formName + ".s1", false, (short) 30));
+    list.add(new MStringInput(formName + ".s2_", false, (short) 30));
     list.add(new MIntegerInput(formName + ".i", false));
     return list;
   }
@@ -150,4 +152,4 @@ public class TestDriverConfigUpgrader {
     list.add(new MConfig("f2", inputs1("f2")));
     return list;
   }
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/sqoop/blob/39a22000/core/src/test/java/org/apache/sqoop/driver/TestJobManager.java
----------------------------------------------------------------------
diff --git a/core/src/test/java/org/apache/sqoop/driver/TestJobManager.java b/core/src/test/java/org/apache/sqoop/driver/TestJobManager.java
index 3b475c6..5bc1b03 100644
--- a/core/src/test/java/org/apache/sqoop/driver/TestJobManager.java
+++ b/core/src/test/java/org/apache/sqoop/driver/TestJobManager.java
@@ -71,10 +71,10 @@ public class TestJobManager {
 
   @Test
   public void testGetConnector() {
-    when(connectorMgrMock.getConnector(123l)).thenReturn(sqoopConnectorMock);
+    when(connectorMgrMock.getSqoopConnector(123l)).thenReturn(sqoopConnectorMock);
     when(sqoopConnectorMock.getSupportedDirections()).thenReturn(getSupportedDirections());
-    assertEquals(jobManager.getConnector(123l), sqoopConnectorMock);
-    verify(connectorMgrMock, times(1)).getConnector(123l);
+    assertEquals(jobManager.getSqoopConnector(123l), sqoopConnectorMock);
+    verify(connectorMgrMock, times(1)).getSqoopConnector(123l);
   }
 
   @Test