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package com.sun.enterprise.resource;
import javax.transaction.xa.*;
import javax.resource.spi.*;
import com.sun.enterprise.PoolManager;
import com.sun.enterprise.Switch;
import com.sun.enterprise.J2EETransactionManager;
import com.sun.enterprise.distributedtx.J2EETransaction;
import java.util.logging.Logger;
import java.util.logging.Level;
import java.util.Hashtable;
import java.util.Set;
import java.util.Map;
import java.util.Iterator;
import com.sun.logging.LogDomains;
import com.sun.jts.CosTransactions.Configuration;
/**
* @author Tony Ng
*
*/
public class ConnectorXAResource implements XAResource {
private Object userHandle;
private ResourceSpec spec;
private String poolName;
private ResourceAllocator alloc;
private PoolManager poolMgr;
private ManagedConnection localConnection;
private ClientSecurityInfo info;
private ConnectionEventListener listener;
private ResourceHandle localHandle_;
private static Hashtable listenerTable = new Hashtable();
// Create logger object per Java SDK 1.4 to log messages
// introduced Santanu De, Sun Microsystems, March 2002
static Logger _logger = LogDomains.getLogger(LogDomains.RSR_LOGGER);
public ConnectorXAResource(ResourceHandle handle,
ResourceSpec spec,
ResourceAllocator alloc,
ClientSecurityInfo info ) {
// initially userHandle is associated with mc
this.poolMgr = Switch.getSwitch().getPoolManager();
this.userHandle = null;
this.spec = spec;
this.poolName = spec.getConnectionPoolName();
this.alloc = alloc;
this.info = info;
localConnection = (ManagedConnection) handle.getResource();
localHandle_ = handle;
}
public void setUserHandle(Object userHandle) {
this.userHandle = userHandle;
}
private void handleResourceException(Exception ex)
throws XAException {
_logger.log(Level.SEVERE,"poolmgr.system_exception",ex);
XAException xae = new XAException(ex.toString());
xae.errorCode = XAException.XAER_RMERR;
throw xae;
}
public void commit(Xid xid, boolean onePhase) throws XAException {
try {
ResourceHandle handle = getResourceHandle();
ManagedConnection mc = (ManagedConnection) handle.getResource();
mc.getLocalTransaction().commit();
} catch (Exception ex) {
handleResourceException(ex);
}finally{
resetAssociation();
}
}
public void start(Xid xid, int flags) throws XAException {
try {
ResourceHandle handle = getResourceHandle();
if (!localHandle_.equals(handle)) {
ManagedConnection mc = (ManagedConnection) handle.getResource();
mc.associateConnection(userHandle);
LocalTxConnectionEventListener l =
(LocalTxConnectionEventListener) handle.getListener();
if(_logger.isLoggable(Level.FINE)){
_logger.log(Level.FINE, "connection_sharing_start", userHandle);
}
l.associateHandle(userHandle, localHandle_);
}
} catch (Exception ex) {
handleResourceException(ex);
}
}
public void end(Xid xid, int flags) throws XAException {
if (_logger.isLoggable(Level.FINE)) {
_logger.log(Level.FINE, "connection_sharing_end");
}
try {
ResourceHandle handleInTransaction = getResourceHandle();
if (!localHandle_.equals(handleInTransaction)) {
LocalTxConnectionEventListener l = (LocalTxConnectionEventListener) handleInTransaction.getListener();
ResourceHandle handle = l.removeAssociation(userHandle);
if (handle != null) { // not needed, just to be sure.
ManagedConnection associatedConnection = (ManagedConnection) handle.getResource();
associatedConnection.associateConnection(userHandle);
if (_logger.isLoggable(Level.FINE)) {
_logger.log(Level.FINE, "connection_sharing_reset_association",
userHandle);
}
}
}
} catch (Exception e) {
handleResourceException(e);
}
}
public void forget(Xid xid) throws XAException {
_logger.fine("Well, forget is called for xid :"+xid);
// no-op
}
public int getTransactionTimeout() throws XAException {
return 0;
}
public boolean isSameRM(XAResource other) throws XAException {
if (this == other) return true;
if (other == null) return false;
if (other instanceof ConnectorXAResource) {
ConnectorXAResource obj = (ConnectorXAResource) other;
return (this.spec.equals(obj.spec) &&
this.info.equals(obj.info));
} else {
return false;
}
}
public int prepare(Xid xid) throws XAException {
return Configuration.LAO_PREPARE_OK;
}
public Xid[] recover(int flag) throws XAException {
return new Xid[0];
}
public void rollback(Xid xid) throws XAException {
try {
ResourceHandle handle = getResourceHandle();
ManagedConnection mc = (ManagedConnection) handle.getResource();
mc.getLocalTransaction().rollback();
} catch (Exception ex) {
handleResourceException(ex);
}finally{
resetAssociation();
}
}
public boolean setTransactionTimeout(int seconds) throws XAException {
return false;
}
public static void freeListener(ManagedConnection mc) {
listenerTable.remove(mc);
}
//Commented from 9.1 as it is not used
/*public static void addListener(ManagedConnection mc, ConnectionEventListener l) {
listenerTable.put(mc,l);
}*/
private ResourceHandle getResourceHandle() throws PoolingException {
try {
ResourceHandle h = null;
J2EETransactionManager txMgr = Switch.getSwitch().getTransactionManager();
J2EETransaction j2eetran = (J2EETransaction) txMgr.getTransaction();
if (j2eetran == null) { //Only if some thing is wrong with tx manager.
h = localHandle_; //Just return the local handle.
} else {
h = j2eetran.getNonXAResource();
}
if (h.getResourceState().isUnenlisted()) {
ManagedConnection mc = (ManagedConnection) h.getResource();
// begin the local transaction if first time
// this ManagedConnection is used in this JTA transaction
mc.getLocalTransaction().begin();
}
return h;
} catch (Exception ex) {
_logger.log(Level.SEVERE, "poolmgr.system_exception", ex);
throw new PoolingException(ex.toString(), ex);
}
}
private void resetAssociation() throws XAException{
try {
ResourceHandle handle = getResourceHandle();
LocalTxConnectionEventListener l = (LocalTxConnectionEventListener)handle.getListener();
//Get all associated Handles and reset their ManagedConnection association.
Map associatedHandles = l.getAssociatedHandles();
if(associatedHandles != null ){
Set<Map.Entry> userHandles = associatedHandles.entrySet();
for(Map.Entry userHandleEntry : userHandles ){
ResourceHandle associatedHandle = (ResourceHandle)userHandleEntry.getValue();
ManagedConnection associatedConnection = (ManagedConnection)associatedHandle.getResource();
associatedConnection.associateConnection(userHandleEntry.getKey());
if(_logger.isLoggable(Level.FINE)){
_logger.log(Level.FINE, "connection_sharing_reset_association",
userHandleEntry.getKey());
}
}
//all associated handles are mapped back to their actual Managed Connection. Clear the associations.
associatedHandles.clear();
}
} catch (Exception ex) {
handleResourceException(ex);
}
}
}
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