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
9 package org.opendaylight.controller.dummy.datastore;
11 import akka.actor.Props;
12 import akka.actor.UntypedActor;
13 import com.google.common.base.Stopwatch;
14 import java.util.concurrent.TimeUnit;
15 import org.opendaylight.controller.cluster.datastore.DataStoreVersions;
16 import org.opendaylight.controller.cluster.raft.ReplicatedLogEntry;
17 import org.opendaylight.controller.cluster.raft.messages.AppendEntries;
18 import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply;
19 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshot;
20 import org.opendaylight.controller.cluster.raft.messages.InstallSnapshotReply;
21 import org.opendaylight.controller.cluster.raft.messages.RequestVote;
22 import org.opendaylight.controller.cluster.raft.messages.RequestVoteReply;
23 import org.slf4j.Logger;
24 import org.slf4j.LoggerFactory;
26 public class DummyShard extends UntypedActor {
27 private static final Logger LOG = LoggerFactory.getLogger(DummyShard.class);
29 private final Configuration configuration;
30 private final String followerId;
31 private long lastMessageIndex = -1;
32 private long lastMessageSize = 0;
33 private Stopwatch appendEntriesWatch;
35 public DummyShard(Configuration configuration, String followerId) {
36 this.configuration = configuration;
37 this.followerId = followerId;
38 LOG.info("Creating : {}", followerId);
42 public void onReceive(Object message) throws Exception {
43 if (message instanceof RequestVote) {
44 RequestVote req = (RequestVote) message;
45 sender().tell(new RequestVoteReply(req.getTerm(), true), self());
46 } else if (message instanceof AppendEntries) {
47 handleAppendEntries((AppendEntries) message);
48 } else if (message instanceof InstallSnapshot) {
49 handleInstallSnapshot((InstallSnapshot) message);
51 LOG.error("Unknown message : {}", message.getClass());
55 private void handleInstallSnapshot(InstallSnapshot req) {
56 sender().tell(new InstallSnapshotReply(req.getTerm(), followerId, req.getChunkIndex(), true), self());
59 protected void handleAppendEntries(AppendEntries req) throws InterruptedException {
60 LOG.info("{} - Received AppendEntries message : leader term = {}, index = {}, prevLogIndex = {}, size = {}",
61 followerId, req.getTerm(),req.getLeaderCommit(), req.getPrevLogIndex(), req.getEntries().size());
63 if (appendEntriesWatch != null) {
64 long elapsed = appendEntriesWatch.elapsed(TimeUnit.SECONDS);
66 LOG.error("More than 5 seconds since last append entry, elapsed Time = {} seconds"
67 + ", leaderCommit = {}, prevLogIndex = {}, size = {}",
68 elapsed, req.getLeaderCommit(), req.getPrevLogIndex(), req.getEntries().size());
70 appendEntriesWatch.reset().start();
72 appendEntriesWatch = Stopwatch.createStarted();
75 if (lastMessageIndex == req.getLeaderCommit() && req.getEntries().size() > 0 && lastMessageSize > 0) {
76 LOG.error("{} - Duplicate message with leaderCommit = {} prevLogIndex = {} received", followerId,
77 req.getLeaderCommit(), req.getPrevLogIndex());
80 lastMessageIndex = req.getLeaderCommit();
81 lastMessageSize = req.getEntries().size();
83 long lastIndex = req.getLeaderCommit();
84 if (req.getEntries().size() > 0) {
85 for (ReplicatedLogEntry entry : req.getEntries()) {
86 lastIndex = entry.getIndex();
90 if (configuration.shouldCauseTrouble() && req.getEntries().size() > 0) {
91 boolean ignore = false;
93 if (configuration.shouldDropReplies()) {
94 ignore = Math.random() > 0.5;
97 long delay = (long) (Math.random() * configuration.getMaxDelayInMillis());
100 LOG.info("{} - Randomizing delay : {}", followerId, delay);
102 sender().tell(new AppendEntriesReply(followerId, req.getTerm(), true, lastIndex, req.getTerm(),
103 DataStoreVersions.CURRENT_VERSION), self());
106 sender().tell(new AppendEntriesReply(followerId, req.getTerm(), true, lastIndex, req.getTerm(),
107 DataStoreVersions.CURRENT_VERSION), self());
111 public static Props props(Configuration configuration, final String followerId) {
112 return Props.create(DummyShard.class, configuration, followerId);