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* JBoss, Home of Professional Open Source
* Copyright 2009 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.commands.tx;
import org.infinispan.commands.Visitor;
import org.infinispan.context.InvocationContext;
import org.infinispan.context.impl.TxInvocationContext;
import org.infinispan.transaction.xa.GlobalTransaction;
/**
* Command corresponding to the 2nd phase of 2PC.
*
* @author Manik Surtani (<a href="mailto:manik@jboss.org">manik@jboss.org</a>)
* @author Pedro Ruivo
* @since 4.0
*/
public class CommitCommand extends AbstractTransactionBoundaryCommand {
public static final byte COMMAND_ID = 14;
/**
* This is sent back to callers if the global transaction is not reconised. It can happen if a prepare is sent to one
* set of nodes, which then fail, and a commit is sent to a "new" data owner which has not seen the prepare.
*
* Responding with this value instructs the caller to re-send the prepare. See DistributionInterceptor.visitCommitCommand()
* for details.
*/
public static final byte RESEND_PREPARE = 1;
private CommitCommand() {
super(null); // For command id uniqueness test
}
public CommitCommand(String cacheName, GlobalTransaction gtx) {
super(cacheName);
this.globalTx = gtx;
}
public CommitCommand(String cacheName) {
super(cacheName);
}
@Override
protected Object invalidRemoteTxReturnValue() {
return RESEND_PREPARE;
}
@Override
public Object acceptVisitor(InvocationContext ctx, Visitor visitor) throws Throwable {
return visitor.visitCommitCommand((TxInvocationContext) ctx, this);
}
@Override
public byte getCommandId() {
return COMMAND_ID;
}
@Override
public String toString() {
return "CommitCommand {" + super.toString();
}
/**
* choose the method to invoke depending if the total order protocol is be used or not
*
* @param ctx the context
* @return the value to be returned to the invoked
* @throws Throwable if something goes wrong
*/
@Override
public Object perform(InvocationContext ctx) throws Throwable {
if (isTotalOrder()) {
return super.performIgnoringUnexistingTransaction(ctx);
} else {
return super.perform(ctx);
}
}
}