ClientXAConnection.java from CSDerby at Krugle
Show ClientXAConnection.java syntax highlighted
/*
Derby - Class org.apache.derby.client.ClientXAConnection
Copyright (c) 2003, 2005 The Apache Software Foundation or its licensors, where applicable.
Licensed 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.derby.client;
import java.sql.Connection;
import javax.sql.XAConnection;
import javax.transaction.xa.XAResource;
import org.apache.derby.client.am.SqlException;
import org.apache.derby.client.net.NetLogWriter;
import org.apache.derby.client.net.NetXAConnection;
import org.apache.derby.jdbc.ClientXADataSource;
public class ClientXAConnection extends ClientPooledConnection implements XAConnection {
private static int rmIdSeed_ = 95688932; // semi-random starting value for rmId
private ClientXADataSource derbyds_ = null;
private XAResource xares_ = null;
private org.apache.derby.client.net.NetXAResource netXares_ = null;
private boolean fFirstGetConnection_ = true;
private Connection logicalCon_; // logicalConnection_ is inherited from ClientPooledConnection
// This connection is used to access the indoubt table
private NetXAConnection controlCon_ = null;
public ClientXAConnection(ClientXADataSource ds,
org.apache.derby.client.net.NetLogWriter logWtr,
String userId,
String password) throws SqlException {
super(ds, logWtr, userId, password, getUnigueRmId());
derbyds_ = ds;
// Have to instantiate a real connection here,
// otherwise if XA function is called before the connect happens,
// an error will be returned
// Note: conApp will be set after this call
logicalCon_ = super.getConnection();
netXares_ = new org.apache.derby.client.net.NetXAResource(this,
rmId_, userId, password, netXAPhysicalConnection_);
xares_ = netXares_;
}
public Connection getConnection() throws SqlException {
if (fFirstGetConnection_) {
// Since super.getConnection() has already been called once
// in the constructor, we don't need to call it again for the
// call of this method.
fFirstGetConnection_ = false;
} else {
// A new connection object is required
logicalCon_ = super.getConnection();
if (this.physicalConnection_ != null) { // have a physical connection, check if a NetXAResource
if (netXAPhysicalConnection_ != null) { // the XAResource is a NetXAResource, re-initialize it
netXares_.initForReuse();
}
}
}
return logicalCon_;
}
private static synchronized int getUnigueRmId() {
rmIdSeed_ += 1;
return rmIdSeed_;
}
public int getRmId() {
return rmId_;
}
public XAResource getXAResource() throws SqlException {
if (logWriter_ != null) {
logWriter_.traceExit(this, "getXAResource", xares_);
}
return xares_;
}
public ClientXADataSource getDataSource() throws SqlException {
if (logWriter_ != null) {
logWriter_.traceExit(this, "getDataSource", derbyds_);
}
return derbyds_;
}
public NetXAConnection createControlConnection(NetLogWriter logWriter,
String user,
String password,
org.apache.derby.jdbc.ClientDataSource dataSource,
int rmId,
boolean isXAConn) throws SqlException {
controlCon_ = new NetXAConnection(logWriter,
user,
password,
dataSource,
rmId,
isXAConn);
controlCon_.setTransactionIsolation(Connection.TRANSACTION_READ_UNCOMMITTED);
if (logWriter_ != null) {
logWriter_.traceExit(this, "createControlConnection", controlCon_);
}
return controlCon_;
}
public synchronized void close() throws SqlException {
super.close();
}
}
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