in modules/raft/src/main/java/org/apache/ignite/raft/jraft/core/NodeImpl.java [983:1165]
public boolean init(final NodeOptions opts) {
Requires.requireNonNull(opts, "Null node options");
Requires.requireNonNull(opts.getRaftOptions(), "Null raft options");
Requires.requireNonNull(opts.getServiceFactory(), "Null jraft service factory");
this.serviceFactory = opts.getServiceFactory();
this.clock = opts.getClock();
this.options = opts;
this.raftOptions = opts.getRaftOptions();
this.metrics = new NodeMetrics(opts.isEnableMetrics());
this.serverId.setPriority(opts.getElectionPriority());
this.electionTimeoutCounter = 0;
if (opts.getReplicationStateListeners() != null)
this.replicatorStateListeners.addAll(opts.getReplicationStateListeners());
if (this.serverId.isEmpty()) {
LOG.error("Server ID is empty.");
return false;
}
// Init timers.
initTimers(opts);
// Init pools.
initPools(opts);
this.configManager = new ConfigurationManager();
applyDisruptor = opts.getNodeApplyDisruptor();
applyQueue = applyDisruptor.subscribe(getNodeId(), new LogEntryAndClosureHandler());
if (this.metrics.getMetricRegistry() != null) {
this.metrics.getMetricRegistry().register("jraft-node-impl-disruptor",
new DisruptorMetricSet(this.applyQueue));
}
this.fsmCaller = new FSMCallerImpl();
if (!initLogStorage()) {
LOG.error("Node {} initLogStorage failed.", getNodeId());
return false;
}
if (!initMetaStorage()) {
LOG.error("Node {} initMetaStorage failed.", getNodeId());
return false;
}
if (!initFSMCaller(new LogId(0, 0))) {
LOG.error("Node {} initFSMCaller failed.", getNodeId());
return false;
}
this.ballotBox = new BallotBox();
final BallotBoxOptions ballotBoxOpts = new BallotBoxOptions();
ballotBoxOpts.setWaiter(this.fsmCaller);
ballotBoxOpts.setClosureQueue(this.closureQueue);
if (!this.ballotBox.init(ballotBoxOpts)) {
LOG.error("Node {} init ballotBox failed.", getNodeId());
return false;
}
if (!initSnapshotStorage()) {
LOG.error("Node {} initSnapshotStorage failed.", getNodeId());
return false;
}
final Status st = this.logManager.checkConsistency();
if (!st.isOk()) {
LOG.error("Node {} is initialized with inconsistent log, status={}.", getNodeId(), st);
return false;
}
this.conf = new ConfigurationEntry();
this.conf.setId(new LogId());
// if have log using conf in log, else using conf in options
if (this.logManager.getLastLogIndex() > 0) {
checkAndSetConfiguration(false);
}
else {
this.conf.setConf(this.options.getInitialConf());
// initially set to max(priority of all nodes)
this.targetPriority = getMaxPriorityOfNodes(this.conf.getConf().getPeers());
}
if (!this.conf.isEmpty()) {
Requires.requireTrue(this.conf.isValid(), "Invalid conf: %s", this.conf);
}
else {
LOG.info("Init node {} with empty conf.", this.serverId);
}
this.replicatorGroup = new ReplicatorGroupImpl();
this.rpcClientService = new DefaultRaftClientService();
final ReplicatorGroupOptions rgOpts = new ReplicatorGroupOptions();
rgOpts.setHeartbeatTimeoutMs(heartbeatTimeout(this.options.getElectionTimeoutMs()));
rgOpts.setElectionTimeoutMs(this.options.getElectionTimeoutMs());
rgOpts.setLogManager(this.logManager);
rgOpts.setBallotBox(this.ballotBox);
rgOpts.setNode(this);
rgOpts.setRaftRpcClientService(this.rpcClientService);
rgOpts.setSnapshotStorage(this.snapshotExecutor != null ? this.snapshotExecutor.getSnapshotStorage() : null);
rgOpts.setRaftOptions(this.raftOptions);
rgOpts.setTimerManager(this.options.getScheduler());
// Adds metric registry to RPC service.
this.options.setMetricRegistry(this.metrics.getMetricRegistry());
// Wait committed.
long commitIdx = logManager.getLastLogIndex();
CompletableFuture<Long> logApplyComplition = new CompletableFuture<>();
if (commitIdx > fsmCaller.getLastAppliedIndex()) {
LastAppliedLogIndexListener lnsr = new LastAppliedLogIndexListener() {
@Override
public void onApplied( long lastAppliedLogIndex) {
if (lastAppliedLogIndex >= commitIdx) {
logApplyComplition.complete(lastAppliedLogIndex);
fsmCaller.removeLastAppliedLogIndexListener(this);
}
}
};
fsmCaller.addLastAppliedLogIndexListener(lnsr);
fsmCaller.onCommitted(commitIdx);
} else {
logApplyComplition.complete(fsmCaller.getLastAppliedIndex());
}
if (!this.rpcClientService.init(this.options)) {
LOG.error("Fail to init rpc service.");
return false;
}
this.replicatorGroup.init(new NodeId(this.groupId, this.serverId), rgOpts);
this.readOnlyService = new ReadOnlyServiceImpl();
final ReadOnlyServiceOptions rosOpts = new ReadOnlyServiceOptions();
rosOpts.setFsmCaller(this.fsmCaller);
rosOpts.setNode(this);
rosOpts.setRaftOptions(this.raftOptions);
rosOpts.setReadOnlyServiceDisruptor(opts.getReadOnlyServiceDisruptor());
if (!this.readOnlyService.init(rosOpts)) {
LOG.error("Fail to init readOnlyService.");
return false;
}
logApplyComplition.whenComplete((committedIdx, err) -> {
if (err != null) {
LOG.error("Fail to apply committed updates.", err);
}
// set state to follower
this.state = State.STATE_FOLLOWER;
if (LOG.isInfoEnabled()) {
LOG.info("Node {} init, term={}, lastLogId={}, conf={}, oldConf={}.", getNodeId(), this.currTerm,
this.logManager.getLastLogId(false), this.conf.getConf(), this.conf.getOldConf());
}
if (this.snapshotExecutor != null && this.options.getSnapshotIntervalSecs() > 0) {
LOG.debug("Node {} start snapshot timer, term={}.", getNodeId(), this.currTerm);
this.snapshotTimer.start();
}
if (!this.conf.isEmpty()) {
stepDown(this.currTerm, false, new Status());
}
// Now the raft node is started , have to acquire the writeLock to avoid race
// conditions
this.writeLock.lock();
if (this.conf.isStable() && this.conf.getConf().size() == 1 && this.conf.getConf().contains(this.serverId)) {
// The group contains only this server which must be the LEADER, trigger
// the timer immediately.
electSelf();
}
else {
this.writeLock.unlock();
}
applyCommittedFuture.complete(commitIdx);
});
return true;
}