2 * Copyright (c) 2015 Brocade Communications 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.cluster.datastore;
10 import akka.actor.ActorSelection;
11 import com.google.common.base.Optional;
12 import com.google.common.base.Preconditions;
13 import com.google.common.util.concurrent.FutureCallback;
14 import com.google.common.util.concurrent.Futures;
15 import com.google.common.util.concurrent.SettableFuture;
16 import org.opendaylight.controller.cluster.datastore.identifiers.TransactionIdentifier;
17 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
18 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransaction;
19 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
20 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
21 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
22 import scala.concurrent.Future;
25 * Processes front-end transaction operations locally before being committed to the destination shard.
26 * Instances of this class are used when the destination shard is local to the caller.
28 * @author Thomas Pantelis
30 abstract class LocalTransactionContext extends AbstractTransactionContext {
31 private final DOMStoreTransaction txDelegate;
32 private final LocalTransactionReadySupport readySupport;
33 private Exception operationError;
35 LocalTransactionContext(DOMStoreTransaction txDelegate, TransactionIdentifier identifier,
36 LocalTransactionReadySupport readySupport) {
38 this.txDelegate = Preconditions.checkNotNull(txDelegate);
39 this.readySupport = readySupport;
42 protected abstract DOMStoreWriteTransaction getWriteDelegate();
44 protected abstract DOMStoreReadTransaction getReadDelegate();
47 public void writeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
48 incrementModificationCount();
49 if(operationError == null) {
51 getWriteDelegate().write(path, data);
52 } catch (Exception e) {
60 public void mergeData(YangInstanceIdentifier path, NormalizedNode<?, ?> data) {
61 incrementModificationCount();
62 if(operationError == null) {
64 getWriteDelegate().merge(path, data);
65 } catch (Exception e) {
72 public void deleteData(YangInstanceIdentifier path) {
73 incrementModificationCount();
74 if(operationError == null) {
76 getWriteDelegate().delete(path);
77 } catch (Exception e) {
84 public void readData(YangInstanceIdentifier path, final SettableFuture<Optional<NormalizedNode<?, ?>>> proxyFuture) {
85 Futures.addCallback(getReadDelegate().read(path), new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
87 public void onSuccess(final Optional<NormalizedNode<?, ?>> result) {
88 proxyFuture.set(result);
92 public void onFailure(final Throwable t) {
93 proxyFuture.setException(t);
99 public void dataExists(YangInstanceIdentifier path, final SettableFuture<Boolean> proxyFuture) {
100 Futures.addCallback(getReadDelegate().exists(path), new FutureCallback<Boolean>() {
102 public void onSuccess(final Boolean result) {
103 proxyFuture.set(result);
107 public void onFailure(final Throwable t) {
108 proxyFuture.setException(t);
113 private LocalThreePhaseCommitCohort ready() {
114 logModificationCount();
115 LocalThreePhaseCommitCohort cohort = readySupport.onTransactionReady(getWriteDelegate());
116 cohort.setOperationError(operationError);
121 public Future<ActorSelection> readyTransaction() {
122 final LocalThreePhaseCommitCohort cohort = ready();
123 return cohort.initiateCoordinatedCommit();
127 public Future<Object> directCommit() {
128 final LocalThreePhaseCommitCohort cohort = ready();
129 return cohort.initiateDirectCommit();
133 public boolean supportsDirectCommit() {
138 public void closeTransaction() {