+++ /dev/null
-/*
- * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v1.0 which accompanies this distribution,
- * and is available at http://www.eclipse.org/legal/epl-v10.html
- */
-
-package org.opendaylight.controller.cluster.datastore;
-
-import akka.actor.ActorPath;
-import akka.actor.ActorSelection;
-import akka.dispatch.Futures;
-import akka.dispatch.OnComplete;
-
-import com.google.common.collect.Lists;
-import com.google.common.util.concurrent.ListenableFuture;
-import com.google.common.util.concurrent.SettableFuture;
-
-import org.opendaylight.controller.cluster.datastore.messages.AbortTransaction;
-import org.opendaylight.controller.cluster.datastore.messages.AbortTransactionReply;
-import org.opendaylight.controller.cluster.datastore.messages.CanCommitTransaction;
-import org.opendaylight.controller.cluster.datastore.messages.CanCommitTransactionReply;
-import org.opendaylight.controller.cluster.datastore.messages.CommitTransaction;
-import org.opendaylight.controller.cluster.datastore.messages.CommitTransactionReply;
-import org.opendaylight.controller.cluster.datastore.messages.PreCommitTransaction;
-import org.opendaylight.controller.cluster.datastore.messages.PreCommitTransactionReply;
-import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import scala.concurrent.Future;
-
-import java.util.Collections;
-import java.util.List;
-
-/**
- * ThreePhaseCommitCohortProxy represents a set of remote cohort proxies
- */
-public class ThreePhaseCommitCohortProxy implements DOMStoreThreePhaseCommitCohort{
-
- private static final Logger LOG = LoggerFactory.getLogger(DistributedDataStore.class);
-
- private final ActorContext actorContext;
- private final List<ActorPath> cohortPaths;
- private final String transactionId;
-
- public ThreePhaseCommitCohortProxy(ActorContext actorContext, List<ActorPath> cohortPaths,
- String transactionId) {
- this.actorContext = actorContext;
- this.cohortPaths = cohortPaths;
- this.transactionId = transactionId;
- }
-
- @Override
- public ListenableFuture<Boolean> canCommit() {
- LOG.debug("txn {} canCommit", transactionId);
-
- Future<Iterable<Object>> combinedFuture =
- invokeCohorts(new CanCommitTransaction().toSerializable());
-
- final SettableFuture<Boolean> returnFuture = SettableFuture.create();
-
- combinedFuture.onComplete(new OnComplete<Iterable<Object>>() {
- @Override
- public void onComplete(Throwable failure, Iterable<Object> responses) throws Throwable {
- if(failure != null) {
- returnFuture.setException(failure);
- return;
- }
-
- boolean result = true;
- for(Object response: responses) {
- if (response.getClass().equals(CanCommitTransactionReply.SERIALIZABLE_CLASS)) {
- CanCommitTransactionReply reply =
- CanCommitTransactionReply.fromSerializable(response);
- if (!reply.getCanCommit()) {
- result = false;
- break;
- }
- } else {
- LOG.error("Unexpected response type {}", response.getClass());
- returnFuture.setException(new IllegalArgumentException(
- String.format("Unexpected response type {}", response.getClass())));
- return;
- }
- }
-
- returnFuture.set(Boolean.valueOf(result));
- }
- }, actorContext.getActorSystem().dispatcher());
-
- return returnFuture;
- }
-
- private Future<Iterable<Object>> invokeCohorts(Object message) {
- List<Future<Object>> futureList = Lists.newArrayListWithCapacity(cohortPaths.size());
- for(ActorPath actorPath : cohortPaths) {
-
- LOG.debug("txn {} Sending {} to {}", transactionId, message, actorPath);
-
- ActorSelection cohort = actorContext.actorSelection(actorPath);
-
- futureList.add(actorContext.executeRemoteOperationAsync(cohort, message,
- ActorContext.ASK_DURATION));
- }
-
- return Futures.sequence(futureList, actorContext.getActorSystem().dispatcher());
- }
-
- @Override
- public ListenableFuture<Void> preCommit() {
- LOG.debug("txn {} preCommit", transactionId);
- return voidOperation(new PreCommitTransaction().toSerializable(),
- PreCommitTransactionReply.SERIALIZABLE_CLASS, true);
- }
-
- @Override
- public ListenableFuture<Void> abort() {
- LOG.debug("txn {} abort", transactionId);
-
- // Note - we pass false for propagateException. In the front-end data broker, this method
- // is called when one of the 3 phases fails with an exception. We'd rather have that
- // original exception propagated to the client. If our abort fails and we propagate the
- // exception then that exception will supersede and suppress the original exception. But
- // it's the original exception that is the root cause and of more interest to the client.
-
- return voidOperation(new AbortTransaction().toSerializable(),
- AbortTransactionReply.SERIALIZABLE_CLASS, false);
- }
-
- @Override
- public ListenableFuture<Void> commit() {
- LOG.debug("txn {} commit", transactionId);
- return voidOperation(new CommitTransaction().toSerializable(),
- CommitTransactionReply.SERIALIZABLE_CLASS, true);
- }
-
- private ListenableFuture<Void> voidOperation(final Object message,
- final Class<?> expectedResponseClass, final boolean propagateException) {
-
- Future<Iterable<Object>> combinedFuture = invokeCohorts(message);
-
- final SettableFuture<Void> returnFuture = SettableFuture.create();
-
- combinedFuture.onComplete(new OnComplete<Iterable<Object>>() {
- @Override
- public void onComplete(Throwable failure, Iterable<Object> responses) throws Throwable {
-
- Throwable exceptionToPropagate = failure;
- if(exceptionToPropagate == null) {
- for(Object response: responses) {
- if(!response.getClass().equals(expectedResponseClass)) {
- exceptionToPropagate = new IllegalArgumentException(
- String.format("Unexpected response type {}",
- response.getClass()));
- break;
- }
- }
- }
-
- if(exceptionToPropagate != null) {
- if(propagateException) {
- // We don't log the exception here to avoid redundant logging since we're
- // propagating to the caller in MD-SAL core who will log it.
- returnFuture.setException(exceptionToPropagate);
- } else {
- // Since the caller doesn't want us to propagate the exception we'll also
- // not log it normally. But it's usually not good to totally silence
- // exceptions so we'll log it to debug level.
- LOG.debug(String.format("%s failed", message.getClass().getSimpleName()),
- exceptionToPropagate);
- returnFuture.set(null);
- }
- } else {
- returnFuture.set(null);
- }
- }
- }, actorContext.getActorSystem().dispatcher());
-
- return returnFuture;
- }
-
- public List<ActorPath> getCohortPaths() {
- return Collections.unmodifiableList(this.cohortPaths);
- }
-}
Code Review / controller.git / blobdiff