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.controller.md.sal.dom.broker.impl;
10 import com.google.common.base.MoreObjects;
11 import com.google.common.base.MoreObjects.ToStringHelper;
12 import com.google.common.base.Preconditions;
13 import com.google.common.util.concurrent.FutureCallback;
14 import com.google.common.util.concurrent.ListenableFuture;
15 import com.google.common.util.concurrent.SettableFuture;
16 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadWriteTransaction;
17 import org.opendaylight.mdsal.common.api.CommitInfo;
20 * Transaction context. Tracks the relationship with the backend transaction.
21 * We never leak this class to the user and have it implement the {@link FutureCallback}
22 * interface so we have a simple way of propagating the result.
24 final class PingPongTransaction implements FutureCallback<CommitInfo> {
25 private final DOMDataReadWriteTransaction delegate;
26 private final SettableFuture<CommitInfo> future;
27 private DOMDataReadWriteTransaction frontendTransaction;
29 PingPongTransaction(final DOMDataReadWriteTransaction delegate) {
30 this.delegate = Preconditions.checkNotNull(delegate);
31 future = SettableFuture.create();
34 DOMDataReadWriteTransaction getTransaction() {
38 DOMDataReadWriteTransaction getFrontendTransaction() {
39 return frontendTransaction;
42 ListenableFuture<CommitInfo> getCommitFuture() {
47 public void onSuccess(final CommitInfo result) {
52 public void onFailure(final Throwable throwable) {
53 future.setException(throwable);
56 void recordFrontendTransaction(final DOMDataReadWriteTransaction tx) {
57 if (frontendTransaction != null) {
58 frontendTransaction = tx;
63 public String toString() {
64 return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
67 protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
68 return toStringHelper.add("delegate", delegate);