Examples with PaxosLeaderElectionService com.palantir.leader.PaxosLeaderElectionService used on opensource projects

Example 1 with PaxosLeaderElectionService

use of com.palantir.leader.PaxosLeaderElectionService in project atlasdb by palantir.

the class PaxosConsensusTestUtils method setup.

public static PaxosTestState setup(int numLeaders, int quorumSize) {
    List<LeaderElectionService> leaders = Lists.newArrayList();
    List<PaxosAcceptor> acceptors = Lists.newArrayList();
    List<PaxosLearner> learners = Lists.newArrayList();
    List<AtomicBoolean> failureToggles = Lists.newArrayList();
    ExecutorService executor = PTExecutors.newCachedThreadPool();
    RuntimeException e = new RuntimeException("mock server failure");
    for (int i = 0; i < numLeaders; i++) {
        failureToggles.add(new AtomicBoolean(false));
        PaxosLearner learner = PaxosLearnerImpl.newLearner(getLearnerLogDir(i));
        learners.add(ToggleableExceptionProxy.newProxyInstance(PaxosLearner.class, learner, failureToggles.get(i), e));
        PaxosAcceptor acceptor = PaxosAcceptorImpl.newAcceptor(getAcceptorLogDir(i));
        acceptors.add(ToggleableExceptionProxy.newProxyInstance(PaxosAcceptor.class, acceptor, failureToggles.get(i), e));
    }
    for (int i = 0; i < numLeaders; i++) {
        PaxosProposer proposer = PaxosProposerImpl.newProposer(learners.get(i), ImmutableList.<PaxosAcceptor>copyOf(acceptors), ImmutableList.<PaxosLearner>copyOf(learners), quorumSize, UUID.randomUUID(), executor);
        PaxosLeaderElectionService leader = new PaxosLeaderElectionServiceBuilder().proposer(proposer).knowledge(learners.get(i)).potentialLeadersToHosts(ImmutableMap.<PingableLeader, HostAndPort>of()).acceptors(acceptors).learners(learners).executor(executor).pingRateMs(0L).randomWaitBeforeProposingLeadershipMs(0L).leaderPingResponseWaitMs(0L).onlyLogOnQuorumFailure(() -> true).build();
        leaders.add(SimulatingFailingServerProxy.newProxyInstance(LeaderElectionService.class, leader, SERVER_DELAY_TIME_MS, failureToggles.get(i)));
    }
    return new PaxosTestState(leaders, acceptors, learners, failureToggles, executor);
}

Example 2 with PaxosLeaderElectionService

use of com.palantir.leader.PaxosLeaderElectionService in project atlasdb by palantir.

the class Leaders method createInstrumentedLocalServices.

public static LocalPaxosServices createInstrumentedLocalServices(LeaderConfig config, Supplier<LeaderRuntimeConfig> runtime, RemotePaxosServerSpec remotePaxosServerSpec, String userAgent) {
    UUID leaderUuid = UUID.randomUUID();
    PaxosLeadershipEventRecorder leadershipEventRecorder = PaxosLeadershipEventRecorder.create(AtlasDbMetrics.getMetricRegistry(), leaderUuid.toString());
    PaxosAcceptor ourAcceptor = AtlasDbMetrics.instrument(PaxosAcceptor.class, PaxosAcceptorImpl.newAcceptor(config.acceptorLogDir().getPath()));
    PaxosLearner ourLearner = AtlasDbMetrics.instrument(PaxosLearner.class, PaxosLearnerImpl.newLearner(config.learnerLogDir().getPath(), leadershipEventRecorder));
    Optional<SSLSocketFactory> sslSocketFactory = ServiceCreator.createSslSocketFactory(config.sslConfiguration());
    List<PaxosLearner> learners = createProxyAndLocalList(ourLearner, remotePaxosServerSpec.remoteLearnerUris(), sslSocketFactory, PaxosLearner.class, userAgent);
    List<PaxosAcceptor> acceptors = createProxyAndLocalList(ourAcceptor, remotePaxosServerSpec.remoteAcceptorUris(), sslSocketFactory, PaxosAcceptor.class, userAgent);
    Map<PingableLeader, HostAndPort> otherLeaders = generatePingables(remotePaxosServerSpec.remoteLeaderUris(), sslSocketFactory, userAgent);
    InstrumentedExecutorService proposerExecutorService = new InstrumentedExecutorService(PTExecutors.newCachedThreadPool(new ThreadFactoryBuilder().setNameFormat("atlas-proposer-%d").setDaemon(true).build()), AtlasDbMetrics.getMetricRegistry(), MetricRegistry.name(PaxosProposer.class, "executor"));
    PaxosProposer proposer = AtlasDbMetrics.instrument(PaxosProposer.class, PaxosProposerImpl.newProposer(ourLearner, acceptors, learners, config.quorumSize(), leaderUuid, proposerExecutorService));
    InstrumentedExecutorService leaderElectionExecutor = new InstrumentedExecutorService(PTExecutors.newCachedThreadPool(new ThreadFactoryBuilder().setNameFormat("atlas-leaders-election-%d").setDaemon(true).build()), AtlasDbMetrics.getMetricRegistry(), MetricRegistry.name(PaxosLeaderElectionService.class, "executor"));
    PaxosLeaderElectionService paxosLeaderElectionService = new PaxosLeaderElectionServiceBuilder().proposer(proposer).knowledge(ourLearner).potentialLeadersToHosts(otherLeaders).acceptors(acceptors).learners(learners).executor(leaderElectionExecutor).pingRateMs(config.pingRateMs()).randomWaitBeforeProposingLeadershipMs(config.randomWaitBeforeProposingLeadershipMs()).leaderPingResponseWaitMs(config.leaderPingResponseWaitMs()).eventRecorder(leadershipEventRecorder).onlyLogOnQuorumFailure(JavaSuppliers.compose(LeaderRuntimeConfig::onlyLogOnQuorumFailure, runtime)).build();
    LeaderElectionService leaderElectionService = AtlasDbMetrics.instrument(LeaderElectionService.class, paxosLeaderElectionService);
    PingableLeader pingableLeader = AtlasDbMetrics.instrument(PingableLeader.class, paxosLeaderElectionService);
    return ImmutableLocalPaxosServices.builder().ourAcceptor(ourAcceptor).ourLearner(ourLearner).leaderElectionService(leaderElectionService).pingableLeader(pingableLeader).build();
}