/*******************************************************************************
* Copyright (c) 1998, 2008 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.platform.server.oc4j;
import org.eclipse.persistence.sessions.DatabaseSession;
import org.eclipse.persistence.transaction.oc4j.Oc4jTransactionController;
import org.eclipse.persistence.platform.database.OraclePlatform;
import org.eclipse.persistence.platform.server.ServerPlatformBase;
import org.eclipse.persistence.internal.databaseaccess.Platform;
/**
* PUBLIC:
*
* This is the concrete subclass responsible for representing Oc4j-specific server behavior.
*
* This platform overrides:
*
* getExternalTransactionControllerClass(): to use an Oc4j-specific controller class
* initializeServerNameAndVersion(): to call an Oc4j library for this information
*
*/
public class Oc4jPlatform extends ServerPlatformBase {
/**
* INTERNAL:
* Default Constructor: All behavior for the default constructor is inherited
*/
public Oc4jPlatform(DatabaseSession newDatabaseSession) {
super(newDatabaseSession);
}
/**
* INTERNAL: getExternalTransactionControllerClass(): Answer the class of external transaction controller to use
* for Oc4j. This is read-only.
*
* @return Class externalTransactionControllerClass
*
* @see org.eclipse.persistence.transaction.JTATransactionController
* @see ServerPlatformBase.isJTAEnabled()
* @see ServerPlatformBase.disableJTA()
* @see ServerPlatformBase.initializeExternalTransactionController()
*/
public Class getExternalTransactionControllerClass() {
if (externalTransactionControllerClass == null){
externalTransactionControllerClass = Oc4jTransactionController.class;
}
return externalTransactionControllerClass;
}
/**
* INTERNAL: This method is used to unwrap the oracle connection wrapped by
* the application server. TopLink needs this unwrapped connection for certain
* Oracle Specific support. (ie TIMESTAMPTZ)
*/
public java.sql.Connection unwrapConnection(java.sql.Connection connection){
Platform platform = getDatabaseSession().getDatasourceLogin().getDatasourcePlatform();
if(platform.isOracle() && ((OraclePlatform)platform).canUnwrapOracleConnection()) {
return ((OraclePlatform)platform).unwrapOracleConnection(connection);
} else {
return super.unwrapConnection(connection);
}
}
/**
* INTERNAL:
* Clears statement cache of the wrapper connection.
* Required by Oracle proxy authentication: currently connection statement cache
* becomes invalid on switching to/from proxy session.
* This method is called by OracleJDBC_10_1_0_2ProxyConnectionCustomizer
* before opening proxy session and before closing it.
*/
public void clearStatementCache(java.sql.Connection connection) {
Platform platform = getDatabaseSession().getDatasourceLogin().getDatasourcePlatform();
if(platform.isOracle()) {
((OraclePlatform)platform).clearOracleConnectionCache(connection);
}
}
}