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.cluster.raft;
11 import akka.actor.ActorContext;
12 import akka.actor.ActorRef;
13 import akka.actor.ActorSelection;
14 import akka.actor.ActorSystem;
15 import akka.actor.Props;
16 import akka.cluster.Cluster;
17 import com.google.common.annotations.VisibleForTesting;
18 import com.google.common.base.Preconditions;
19 import java.util.ArrayList;
20 import java.util.Collection;
21 import java.util.HashMap;
22 import java.util.HashSet;
23 import java.util.List;
25 import java.util.Optional;
27 import java.util.function.Consumer;
28 import java.util.function.LongSupplier;
29 import javax.annotation.Nonnull;
30 import org.opendaylight.controller.cluster.DataPersistenceProvider;
31 import org.opendaylight.controller.cluster.raft.base.messages.ApplyState;
32 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
33 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
34 import org.opendaylight.controller.cluster.raft.persisted.ServerInfo;
35 import org.opendaylight.controller.cluster.raft.policy.RaftPolicy;
36 import org.slf4j.Logger;
39 * Implementation of the RaftActorContext interface.
42 * @author Thomas Pantelis
44 public class RaftActorContextImpl implements RaftActorContext {
45 private static final LongSupplier JVM_MEMORY_RETRIEVER = () -> Runtime.getRuntime().maxMemory();
47 private final ActorRef actor;
49 private final ActorContext context;
51 private final String id;
53 private final ElectionTerm termInformation;
55 private long commitIndex;
57 private long lastApplied;
59 private ReplicatedLog replicatedLog;
61 private final Map<String, PeerInfo> peerInfoMap = new HashMap<>();
63 private final Logger log;
65 private ConfigParams configParams;
67 private boolean dynamicServerConfiguration = false;
70 private LongSupplier totalMemoryRetriever = JVM_MEMORY_RETRIEVER;
72 // Snapshot manager will need to be created on demand as it needs raft actor context which cannot
73 // be passed to it in the constructor
74 private SnapshotManager snapshotManager;
76 private final DataPersistenceProvider persistenceProvider;
78 private short payloadVersion;
80 private boolean votingMember = true;
82 private RaftActorBehavior currentBehavior;
84 private int numVotingPeers = -1;
86 private Optional<Cluster> cluster;
88 private final Consumer<ApplyState> applyStateConsumer;
90 public RaftActorContextImpl(ActorRef actor, ActorContext context, String id,
91 @Nonnull ElectionTerm termInformation, long commitIndex, long lastApplied,
92 @Nonnull Map<String, String> peerAddresses,
93 @Nonnull ConfigParams configParams, @Nonnull DataPersistenceProvider persistenceProvider,
94 @Nonnull Consumer<ApplyState> applyStateConsumer, @Nonnull Logger logger) {
96 this.context = context;
98 this.termInformation = Preconditions.checkNotNull(termInformation);
99 this.commitIndex = commitIndex;
100 this.lastApplied = lastApplied;
101 this.configParams = Preconditions.checkNotNull(configParams);
102 this.persistenceProvider = Preconditions.checkNotNull(persistenceProvider);
103 this.log = Preconditions.checkNotNull(logger);
104 this.applyStateConsumer = Preconditions.checkNotNull(applyStateConsumer);
106 for (Map.Entry<String, String> e: Preconditions.checkNotNull(peerAddresses).entrySet()) {
107 peerInfoMap.put(e.getKey(), new PeerInfo(e.getKey(), e.getValue(), VotingState.VOTING));
112 public void setPayloadVersion(short payloadVersion) {
113 this.payloadVersion = payloadVersion;
117 public short getPayloadVersion() {
118 return payloadVersion;
121 public void setConfigParams(ConfigParams configParams) {
122 this.configParams = configParams;
126 public ActorRef actorOf(Props props) {
127 return context.actorOf(props);
131 public ActorSelection actorSelection(String path) {
132 return context.actorSelection(path);
136 public String getId() {
141 public ActorRef getActor() {
146 @SuppressWarnings("checkstyle:IllegalCatch")
147 public Optional<Cluster> getCluster() {
148 if (cluster == null) {
150 cluster = Optional.of(Cluster.get(getActorSystem()));
151 } catch (Exception e) {
152 // An exception means there's no cluster configured. This will only happen in unit tests.
153 log.debug("{}: Could not obtain Cluster: {}", getId(), e);
154 cluster = Optional.empty();
162 public ElectionTerm getTermInformation() {
163 return termInformation;
167 public long getCommitIndex() {
171 @Override public void setCommitIndex(long commitIndex) {
172 this.commitIndex = commitIndex;
176 public long getLastApplied() {
181 public void setLastApplied(long lastApplied) {
182 this.lastApplied = lastApplied;
186 public void setReplicatedLog(ReplicatedLog replicatedLog) {
187 this.replicatedLog = replicatedLog;
191 public ReplicatedLog getReplicatedLog() {
192 return replicatedLog;
195 @Override public ActorSystem getActorSystem() {
196 return context.system();
199 @Override public Logger getLogger() {
204 public Collection<String> getPeerIds() {
205 return peerInfoMap.keySet();
209 public Collection<PeerInfo> getPeers() {
210 return peerInfoMap.values();
214 public PeerInfo getPeerInfo(String peerId) {
215 return peerInfoMap.get(peerId);
219 public String getPeerAddress(String peerId) {
221 PeerInfo peerInfo = peerInfoMap.get(peerId);
222 if (peerInfo != null) {
223 peerAddress = peerInfo.getAddress();
224 if (peerAddress == null) {
225 peerAddress = configParams.getPeerAddressResolver().resolve(peerId);
226 peerInfo.setAddress(peerAddress);
229 peerAddress = configParams.getPeerAddressResolver().resolve(peerId);
236 public void updatePeerIds(ServerConfigurationPayload serverConfig) {
238 boolean foundSelf = false;
239 Set<String> currentPeers = new HashSet<>(this.getPeerIds());
240 for (ServerInfo server : serverConfig.getServerConfig()) {
241 if (getId().equals(server.getId())) {
243 if (!server.isVoting()) {
244 votingMember = false;
247 VotingState votingState = server.isVoting() ? VotingState.VOTING : VotingState.NON_VOTING;
248 if (!currentPeers.contains(server.getId())) {
249 this.addToPeers(server.getId(), null, votingState);
251 this.getPeerInfo(server.getId()).setVotingState(votingState);
252 currentPeers.remove(server.getId());
257 for (String peerIdToRemove : currentPeers) {
258 this.removePeer(peerIdToRemove);
262 votingMember = false;
265 log.debug("{}: Updated server config: isVoting: {}, peers: {}", id, votingMember, peerInfoMap.values());
267 setDynamicServerConfigurationInUse();
270 @Override public ConfigParams getConfigParams() {
275 public void addToPeers(String peerId, String address, VotingState votingState) {
276 peerInfoMap.put(peerId, new PeerInfo(peerId, address, votingState));
281 public void removePeer(String name) {
282 if (getId().equals(name)) {
283 votingMember = false;
285 peerInfoMap.remove(name);
290 @Override public ActorSelection getPeerActorSelection(String peerId) {
291 String peerAddress = getPeerAddress(peerId);
292 if (peerAddress != null) {
293 return actorSelection(peerAddress);
299 public void setPeerAddress(String peerId, String peerAddress) {
300 PeerInfo peerInfo = peerInfoMap.get(peerId);
301 if (peerInfo != null) {
302 log.info("Peer address for peer {} set to {}", peerId, peerAddress);
303 peerInfo.setAddress(peerAddress);
308 public SnapshotManager getSnapshotManager() {
309 if (snapshotManager == null) {
310 snapshotManager = new SnapshotManager(this, log);
312 return snapshotManager;
316 public long getTotalMemory() {
317 return totalMemoryRetriever.getAsLong();
321 public void setTotalMemoryRetriever(LongSupplier retriever) {
322 totalMemoryRetriever = retriever == null ? JVM_MEMORY_RETRIEVER : retriever;
326 public boolean hasFollowers() {
327 return !getPeerIds().isEmpty();
331 public DataPersistenceProvider getPersistenceProvider() {
332 return persistenceProvider;
337 public RaftPolicy getRaftPolicy() {
338 return configParams.getRaftPolicy();
342 public boolean isDynamicServerConfigurationInUse() {
343 return dynamicServerConfiguration;
347 public void setDynamicServerConfigurationInUse() {
348 this.dynamicServerConfiguration = true;
352 public ServerConfigurationPayload getPeerServerInfo(boolean includeSelf) {
353 if (!isDynamicServerConfigurationInUse()) {
356 Collection<PeerInfo> peers = getPeers();
357 List<ServerInfo> newConfig = new ArrayList<>(peers.size() + 1);
358 for (PeerInfo peer: peers) {
359 newConfig.add(new ServerInfo(peer.getId(), peer.isVoting()));
363 newConfig.add(new ServerInfo(getId(), votingMember));
366 return new ServerConfigurationPayload(newConfig);
370 public boolean isVotingMember() {
375 public boolean anyVotingPeers() {
376 if (numVotingPeers < 0) {
378 for (PeerInfo info: getPeers()) {
379 if (info.isVoting()) {
385 return numVotingPeers > 0;
389 public RaftActorBehavior getCurrentBehavior() {
390 return currentBehavior;
393 void setCurrentBehavior(final RaftActorBehavior behavior) {
394 this.currentBehavior = Preconditions.checkNotNull(behavior);
398 public Consumer<ApplyState> getApplyStateConsumer() {
399 return applyStateConsumer;
402 @SuppressWarnings("checkstyle:IllegalCatch")
404 if (currentBehavior != null) {
406 currentBehavior.close();
407 } catch (Exception e) {
408 log.debug("{}: Error closing behavior {}", getId(), currentBehavior.state(), e);