2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.mdsal.dom.broker;
10 import org.opendaylight.mdsal.common.api.TransactionCommitFailedException;
12 import com.google.common.base.MoreObjects;
13 import com.google.common.base.MoreObjects.ToStringHelper;
14 import com.google.common.base.Preconditions;
15 import com.google.common.util.concurrent.CheckedFuture;
16 import com.google.common.util.concurrent.FutureCallback;
17 import com.google.common.util.concurrent.SettableFuture;
18 import org.opendaylight.mdsal.dom.api.DOMDataReadWriteTransaction;
21 * Transaction context. Tracks the relationship with the backend transaction.
22 * We never leak this class to the user and have it implement the {@link FutureCallback}
23 * interface so we have a simple way of propagating the result.
25 final class PingPongTransaction implements FutureCallback<Void> {
26 private final CheckedFuture<Void, TransactionCommitFailedException> submitFuture;
27 private final DOMDataReadWriteTransaction delegate;
28 private final SettableFuture<Void> future;
29 private DOMDataReadWriteTransaction frontendTransaction;
31 PingPongTransaction(final DOMDataReadWriteTransaction delegate) {
32 this.delegate = Preconditions.checkNotNull(delegate);
33 future = SettableFuture.create();
34 submitFuture = new PingPongFuture(future);
37 DOMDataReadWriteTransaction getTransaction() {
41 DOMDataReadWriteTransaction getFrontendTransaction() {
42 return frontendTransaction;
45 CheckedFuture<Void, TransactionCommitFailedException> getSubmitFuture() {
50 public void onSuccess(final Void result) {
55 public void onFailure(final Throwable t) {
56 future.setException(t);
59 void recordFrontendTransaction(final DOMDataReadWriteTransaction tx) {
60 if (frontendTransaction != null) {
61 frontendTransaction = tx;
66 public String toString() {
67 return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
70 protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
71 return toStringHelper.add("delegate", delegate);