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.LongSupplier;
28 import org.opendaylight.controller.cluster.DataPersistenceProvider;
29 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
30 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
31 import org.opendaylight.controller.cluster.raft.persisted.ServerInfo;
32 import org.opendaylight.controller.cluster.raft.policy.RaftPolicy;
33 import org.slf4j.Logger;
36 * Implementation of the RaftActorContext interface.
39 * @author Thomas Pantelis
41 public class RaftActorContextImpl implements RaftActorContext {
42 private static final LongSupplier JVM_MEMORY_RETRIEVER = () -> Runtime.getRuntime().maxMemory();
44 private final ActorRef actor;
46 private final ActorContext context;
48 private final String id;
50 private final ElectionTerm termInformation;
52 private long commitIndex;
54 private long lastApplied;
56 private ReplicatedLog replicatedLog;
58 private final Map<String, PeerInfo> peerInfoMap = new HashMap<>();
60 private final Logger log;
62 private ConfigParams configParams;
64 private boolean dynamicServerConfiguration = false;
67 private LongSupplier totalMemoryRetriever = JVM_MEMORY_RETRIEVER;
69 // Snapshot manager will need to be created on demand as it needs raft actor context which cannot
70 // be passed to it in the constructor
71 private SnapshotManager snapshotManager;
73 private final DataPersistenceProvider persistenceProvider;
75 private short payloadVersion;
77 private boolean votingMember = true;
79 private RaftActorBehavior currentBehavior;
81 private int numVotingPeers = -1;
83 private Optional<Cluster> cluster;
85 public RaftActorContextImpl(ActorRef actor, ActorContext context, String id,
86 ElectionTerm termInformation, long commitIndex, long lastApplied, Map<String, String> peerAddresses,
87 ConfigParams configParams, DataPersistenceProvider persistenceProvider, Logger logger) {
89 this.context = context;
91 this.termInformation = termInformation;
92 this.commitIndex = commitIndex;
93 this.lastApplied = lastApplied;
94 this.configParams = configParams;
95 this.persistenceProvider = persistenceProvider;
98 for (Map.Entry<String, String> e: peerAddresses.entrySet()) {
99 peerInfoMap.put(e.getKey(), new PeerInfo(e.getKey(), e.getValue(), VotingState.VOTING));
104 public void setPayloadVersion(short payloadVersion) {
105 this.payloadVersion = payloadVersion;
109 public short getPayloadVersion() {
110 return payloadVersion;
113 public void setConfigParams(ConfigParams configParams) {
114 this.configParams = configParams;
118 public ActorRef actorOf(Props props) {
119 return context.actorOf(props);
123 public ActorSelection actorSelection(String path) {
124 return context.actorSelection(path);
128 public String getId() {
133 public ActorRef getActor() {
138 @SuppressWarnings("checkstyle:IllegalCatch")
139 public Optional<Cluster> getCluster() {
140 if (cluster == null) {
142 cluster = Optional.of(Cluster.get(getActorSystem()));
143 } catch (Exception e) {
144 // An exception means there's no cluster configured. This will only happen in unit tests.
145 log.debug("{}: Could not obtain Cluster: {}", getId(), e);
146 cluster = Optional.empty();
154 public ElectionTerm getTermInformation() {
155 return termInformation;
159 public long getCommitIndex() {
163 @Override public void setCommitIndex(long commitIndex) {
164 this.commitIndex = commitIndex;
168 public long getLastApplied() {
173 public void setLastApplied(long lastApplied) {
174 this.lastApplied = lastApplied;
178 public void setReplicatedLog(ReplicatedLog replicatedLog) {
179 this.replicatedLog = replicatedLog;
183 public ReplicatedLog getReplicatedLog() {
184 return replicatedLog;
187 @Override public ActorSystem getActorSystem() {
188 return context.system();
191 @Override public Logger getLogger() {
196 public Collection<String> getPeerIds() {
197 return peerInfoMap.keySet();
201 public Collection<PeerInfo> getPeers() {
202 return peerInfoMap.values();
206 public PeerInfo getPeerInfo(String peerId) {
207 return peerInfoMap.get(peerId);
211 public String getPeerAddress(String peerId) {
213 PeerInfo peerInfo = peerInfoMap.get(peerId);
214 if (peerInfo != null) {
215 peerAddress = peerInfo.getAddress();
216 if (peerAddress == null) {
217 peerAddress = configParams.getPeerAddressResolver().resolve(peerId);
218 peerInfo.setAddress(peerAddress);
221 peerAddress = configParams.getPeerAddressResolver().resolve(peerId);
228 public void updatePeerIds(ServerConfigurationPayload serverConfig) {
230 boolean foundSelf = false;
231 Set<String> currentPeers = new HashSet<>(this.getPeerIds());
232 for (ServerInfo server : serverConfig.getServerConfig()) {
233 if (getId().equals(server.getId())) {
235 if (!server.isVoting()) {
236 votingMember = false;
239 VotingState votingState = server.isVoting() ? VotingState.VOTING : VotingState.NON_VOTING;
240 if (!currentPeers.contains(server.getId())) {
241 this.addToPeers(server.getId(), null, votingState);
243 this.getPeerInfo(server.getId()).setVotingState(votingState);
244 currentPeers.remove(server.getId());
249 for (String peerIdToRemove : currentPeers) {
250 this.removePeer(peerIdToRemove);
254 votingMember = false;
257 log.debug("{}: Updated server config: isVoting: {}, peers: {}", id, votingMember, peerInfoMap.values());
259 setDynamicServerConfigurationInUse();
262 @Override public ConfigParams getConfigParams() {
267 public void addToPeers(String peerId, String address, VotingState votingState) {
268 peerInfoMap.put(peerId, new PeerInfo(peerId, address, votingState));
273 public void removePeer(String name) {
274 if (getId().equals(name)) {
275 votingMember = false;
277 peerInfoMap.remove(name);
282 @Override public ActorSelection getPeerActorSelection(String peerId) {
283 String peerAddress = getPeerAddress(peerId);
284 if (peerAddress != null) {
285 return actorSelection(peerAddress);
291 public void setPeerAddress(String peerId, String peerAddress) {
292 PeerInfo peerInfo = peerInfoMap.get(peerId);
293 if (peerInfo != null) {
294 log.info("Peer address for peer {} set to {}", peerId, peerAddress);
295 peerInfo.setAddress(peerAddress);
300 public SnapshotManager getSnapshotManager() {
301 if (snapshotManager == null) {
302 snapshotManager = new SnapshotManager(this, log);
304 return snapshotManager;
308 public long getTotalMemory() {
309 return totalMemoryRetriever.getAsLong();
313 public void setTotalMemoryRetriever(LongSupplier retriever) {
314 totalMemoryRetriever = retriever == null ? JVM_MEMORY_RETRIEVER : retriever;
318 public boolean hasFollowers() {
319 return !getPeerIds().isEmpty();
323 public DataPersistenceProvider getPersistenceProvider() {
324 return persistenceProvider;
329 public RaftPolicy getRaftPolicy() {
330 return configParams.getRaftPolicy();
334 public boolean isDynamicServerConfigurationInUse() {
335 return dynamicServerConfiguration;
339 public void setDynamicServerConfigurationInUse() {
340 this.dynamicServerConfiguration = true;
344 public ServerConfigurationPayload getPeerServerInfo(boolean includeSelf) {
345 if (!isDynamicServerConfigurationInUse()) {
348 Collection<PeerInfo> peers = getPeers();
349 List<ServerInfo> newConfig = new ArrayList<>(peers.size() + 1);
350 for (PeerInfo peer: peers) {
351 newConfig.add(new ServerInfo(peer.getId(), peer.isVoting()));
355 newConfig.add(new ServerInfo(getId(), votingMember));
358 return new ServerConfigurationPayload(newConfig);
362 public boolean isVotingMember() {
367 public boolean anyVotingPeers() {
368 if (numVotingPeers < 0) {
370 for (PeerInfo info: getPeers()) {
371 if (info.isVoting()) {
377 return numVotingPeers > 0;
381 public RaftActorBehavior getCurrentBehavior() {
382 return currentBehavior;
385 void setCurrentBehavior(final RaftActorBehavior behavior) {
386 this.currentBehavior = Preconditions.checkNotNull(behavior);
389 @SuppressWarnings("checkstyle:IllegalCatch")
391 if (currentBehavior != null) {
393 currentBehavior.close();
394 } catch (Exception e) {
395 log.debug("{}: Error closing behavior {}", getId(), currentBehavior.state(), e);