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 org.opendaylight.mdsal.dom.api.DOMDataReadWriteTransaction;
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.ListenableFuture;
18 import com.google.common.util.concurrent.SettableFuture;
19 import org.opendaylight.controller.md.sal.common.api.TransactionStatus;
20 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
21 import org.opendaylight.yangtools.yang.common.RpcResult;
24 * Transaction context. Tracks the relationship with the backend transaction.
25 * We never leak this class to the user and have it implement the {@link FutureCallback}
26 * interface so we have a simple way of propagating the result.
28 final class PingPongTransaction implements FutureCallback<Void> {
29 private final CheckedFuture<Void, TransactionCommitFailedException> submitFuture;
30 private final ListenableFuture<RpcResult<TransactionStatus>> commitFuture;
31 private final DOMDataReadWriteTransaction delegate;
32 private final SettableFuture<Void> future;
33 private DOMDataReadWriteTransaction frontendTransaction;
35 PingPongTransaction(final DOMDataReadWriteTransaction delegate) {
36 this.delegate = Preconditions.checkNotNull(delegate);
37 future = SettableFuture.create();
38 submitFuture = new PingPongFuture(future);
39 commitFuture = CommitCompatibility.convertToLegacyCommitFuture(submitFuture);
42 DOMDataReadWriteTransaction getTransaction() {
46 DOMDataReadWriteTransaction getFrontendTransaction() {
47 return frontendTransaction;
50 CheckedFuture<Void, TransactionCommitFailedException> getSubmitFuture() {
54 ListenableFuture<RpcResult<TransactionStatus>> getCommitFuture() {
59 public void onSuccess(final Void result) {
64 public void onFailure(final Throwable t) {
65 future.setException(t);
68 void recordFrontendTransaction(final DOMDataReadWriteTransaction tx) {
69 if (frontendTransaction != null) {
70 frontendTransaction = tx;
75 public String toString() {
76 return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
79 protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
80 return toStringHelper.add("delegate", delegate);