2 * Copyright (c) 2016 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.openflowplugin.applications.frsync.impl;
10 import com.google.common.util.concurrent.FutureCallback;
11 import com.google.common.util.concurrent.Futures;
12 import com.google.common.util.concurrent.ListenableFuture;
13 import com.google.common.util.concurrent.MoreExecutors;
14 import java.util.concurrent.Semaphore;
15 import java.util.concurrent.TimeUnit;
16 import org.opendaylight.openflowplugin.applications.frsync.SemaphoreKeeper;
17 import org.opendaylight.openflowplugin.applications.frsync.SyncReactor;
18 import org.opendaylight.openflowplugin.applications.frsync.util.PathUtil;
19 import org.opendaylight.openflowplugin.applications.frsync.util.SemaphoreKeeperGuavaImpl;
20 import org.opendaylight.openflowplugin.applications.frsync.util.SyncupEntry;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
23 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
28 * Decorator for NodeId level syncup locking.
30 public class SyncReactorGuardDecorator implements SyncReactor {
32 private static final Logger LOG = LoggerFactory.getLogger(SyncReactorGuardDecorator.class);
33 private final SyncReactor delegate;
34 private final SemaphoreKeeper<InstanceIdentifier<FlowCapableNode>> semaphoreKeeper =
35 new SemaphoreKeeperGuavaImpl<>(1, true);
37 public SyncReactorGuardDecorator(final SyncReactor delegate) {
38 this.delegate = delegate;
42 public ListenableFuture<Boolean> syncup(final InstanceIdentifier<FlowCapableNode> flowcapableNodePath,
43 final SyncupEntry syncupEntry) {
44 final NodeId nodeId = PathUtil.digNodeId(flowcapableNodePath);
45 final long stampBeforeGuard = System.nanoTime();
46 final Semaphore guard = semaphoreKeeper.summonGuardAndAcquire(flowcapableNodePath);
48 return Futures.immediateFuture(Boolean.FALSE);
50 final long stampAfterGuard = System.nanoTime();
52 if (LOG.isDebugEnabled()) {
53 LOG.debug("Syncup guard acquired and running for {} ", nodeId.getValue());
55 final ListenableFuture<Boolean> endResult = delegate.syncup(flowcapableNodePath, syncupEntry);
56 Futures.addCallback(endResult, createSyncupCallback(guard, stampBeforeGuard, stampAfterGuard, nodeId),
57 MoreExecutors.directExecutor());
61 private FutureCallback<Boolean> createSyncupCallback(final Semaphore guard,
62 final long stampBeforeGuard,
63 final long stampAfterGuard,
64 final NodeId nodeId) {
65 return new FutureCallback<Boolean>() {
67 public void onSuccess(final Boolean result) {
68 if (LOG.isDebugEnabled()) {
69 final long stampFinished = System.nanoTime();
70 LOG.debug("Syncup finished {} took:{} rpc:{} wait:{}", nodeId.getValue(),
71 formatNanos(stampFinished - stampBeforeGuard), formatNanos(stampFinished - stampAfterGuard),
72 formatNanos(stampAfterGuard - stampBeforeGuard));
74 semaphoreKeeper.releaseGuard(guard);
78 public void onFailure(final Throwable failure) {
79 final long stampFinished = System.nanoTime();
80 LOG.warn("Syncup failed {} took:{} rpc:{} wait:{}", nodeId.getValue(),
81 formatNanos(stampFinished - stampBeforeGuard), formatNanos(stampFinished - stampAfterGuard),
82 formatNanos(stampAfterGuard - stampBeforeGuard));
83 semaphoreKeeper.releaseGuard(guard);
88 private static String formatNanos(final long nanos) {
89 return "'" + TimeUnit.NANOSECONDS.toMillis(nanos) + " ms'";