com.sun.enterprise.transaction.jts.recovery.OracleXAResource Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of payara-embedded-web Show documentation
Show all versions of payara-embedded-web Show documentation
Embedded-Web Distribution of the Payara Project
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
// Portions Copyright [2019] Payara Foundation and/or affiliates
//Source File Name: OracleXAResource.java
package com.sun.enterprise.transaction.jts.recovery;
import com.sun.enterprise.transaction.api.XAResourceWrapper;
import com.sun.enterprise.util.i18n.StringManager;
import com.sun.logging.LogDomains;
import javax.transaction.xa.XAException;
import javax.transaction.xa.XAResource;
import javax.transaction.xa.Xid;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* This implements workaround for Oracle XAResource. Oracle's 8.1.7 XAResource implementation
* doesn't work fine while recovery. This class fires sql statements to achieve same.
*
* @author Bala Dutt
* @version 1.0
*/
public class OracleXAResource extends XAResourceWrapper
{
// Use superclass for Sting Manager
private static final StringManager sm = StringManager.getManager(XAResourceWrapper.class);
// Use JTA_LOGGER for backward compatibility, so use a class from
// 'jta' bundle to load it.
private static final Logger _logger = LogDomains.getLogger(
com.sun.enterprise.transaction.JavaEETransactionManagerSimplified.class,
LogDomains.JTA_LOGGER);
public XAResourceWrapper getInstance() {
return new OracleXAResource();
}
/**
* Recovers list of xids in transaction table. Recover on oracle ignores flags sent to it, this method
* takes care of flags in addition to calling recoverList for xid list.
*
* @param flag an int value
* @return a Xid[] value
* @exception XAException if an error occurs
*/
public Xid[] recover(int flag) throws XAException {
if(flag==XAResource.TMNOFLAGS)
return null;
return recoverList(flag);
}
/**
* Fires a select statement so that transaction xids are updated and retrieve the xid list. Oracle
* doesn't update the xid's for sometime. After this update, recover of real oracle xa resource is
* is used get xid list.
*
* @return a Xid[] value
* @exception XAException if an error occurs
*/
private Xid [] recoverList(int flag) throws XAException{
Statement stmt = null;
ResultSet resultset = null;
Connection con = null;
try{
con=(Connection)m_xacon.getConnection(subject,null);
if(null == con)
// throw new XAException("Oracle XA Resource wrapper : connection could not be got");
throw new XAException(sm.getString("transaction.oracle_xa_wrapper_connection_failed"));
stmt = con.createStatement();
resultset = stmt.executeQuery(
"select pending.local_tran_id from SYS.PENDING_TRANS$ pending, SYS.DBA_2PC_NEIGHBORS");
resultset.close();
resultset = null;
stmt.close();
stmt=null;
return m_xacon.getXAResource().recover(flag);
}
catch(SQLException sqlexception){
//Trace.info("Failed to recover xid list");
// throw new XAException("oracle XA Resource wrapper : "+sqlexception);
throw new XAException(sm.getString("transaction.oracle_sqlexception_occurred",sqlexception));
}
catch(XAException e){
throw e;
}
catch(Exception e){
throw new XAException(sm.getString("transaction.oracle_unknownexception_occurred",e));
// throw new XAException("oracle XA Resource wrapper : "+e);
}
finally{
if(null != resultset)
try{
resultset.close();
}
catch(SQLException sqlexception1) { }
if(null != stmt)
try{
stmt.close();
}
catch(SQLException sqlexception2) { }
}
}
public void commit(Xid xid, boolean flag) throws XAException{
doRecovery(xid, true);
}
public void rollback(Xid xid) throws XAException{
doRecovery(xid, false);
}
/**
* Does actual recovery depending on boolean argument - true for commmit.
*
* @param xid a Xid value
* @param isCommit a boolean value
* @exception XAException if an error occurs
*/
private void doRecovery(Xid xid, boolean isCommit) throws XAException{
try {
if (isCommit)
m_xacon.getXAResource().commit(xid,true);
else
m_xacon.getXAResource().rollback(xid);
} catch (XAException ex) {
_logger.log(Level.FINEST," An XAException occurred while calling XAResource method " , ex);
} catch (Exception ex) {
_logger.log(Level.FINEST," An Exception occurred while calling XAResource method " , ex);
}
Statement stmt = null;
ResultSet resultset = null;
Connection con = null;
try{
con=(Connection)m_xacon.getConnection(subject,null);
if(null == con)
throw new XAException(sm.getString("transaction.oracle_xa_wrapper_connection_failed"));
// throw new XAException("Oracle XA Resource wrapper : connection could not be got");
stmt = con.createStatement();
resultset = stmt.executeQuery(
"select pending.local_tran_id from SYS.PENDING_TRANS$ pending, SYS.DBA_2PC_NEIGHBORS dba where pending.global_foreign_id = '"
+ toHexString(xid.getGlobalTransactionId()) +
"' and pending.local_tran_id = dba.local_tran_id and dba.branch = '"
+ toHexString(xid.getBranchQualifier()) +
"' and pending.state = 'prepared'");
if(resultset.next()){
String s = resultset.getString(1);
resultset.close();
resultset = null;
stmt.executeUpdate((isCommit ? "commit force '" : "rollback force '") + s + "'");
stmt.close();
stmt=null;
}
}
catch(SQLException sqlexception){
//Trace.info("Failed to recover " + xid+" "+ sqlexception);
_logger.log(Level.FINE," An SQLException during recovery " , sqlexception);
throw new XAException(sm.getString("transaction.oracle_sqlexception_occurred",sqlexception));
// throw new XAException("oracle XA Resource wrapper : "+sqlexception);
}
catch(Exception e){
//Trace.info("Exception while RecoveryTestRI recover "+e);
_logger.log(Level.FINE," An Exception during recovery " , e);
throw new XAException(sm.getString("transaction.oracle_unknownexception_occurred",e));
// throw new XAException("oracle XA Resource wrapper : "+e);
}
finally{
if(null != resultset)
try{
resultset.close();
}
catch(SQLException sqlexception1) { }
if(null != stmt)
try{
stmt.close();
}
catch(SQLException sqlexception2) { }
}
}
private static final char HEX_DIGITS[] = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F'
};
/**
* Converts Xids into string that can be used in sql statements for oracle.
*
* @param abyte0[] a byte value
* @return a String value
*/
private static String toHexString(byte abyte0[]) {
StringBuilder builder = new StringBuilder();
if(null != abyte0 && 0 < abyte0.length) {
for(int i = 0; i < abyte0.length; i++) {
builder.append(HEX_DIGITS[(abyte0[i] & 0xf0) >> 4]);
builder.append(HEX_DIGITS[abyte0[i] & 0xf]);
}
return builder.toString();
} else {
return "";
}
}
}