public void runFromConfig()

in zookeeper-server/src/main/java/org/apache/zookeeper/server/quorum/QuorumPeerMain.java [145:243]
89 lines of code
11 McCabe index (conditional complexity)

    public void runFromConfig(QuorumPeerConfig config) throws IOException, AdminServerException {
        try {
            ManagedUtil.registerLog4jMBeans();
        } catch (JMException e) {
            LOG.warn("Unable to register log4j JMX control", e);
        }

        LOG.info("Starting quorum peer, myid=" + config.getServerId());
        final MetricsProvider metricsProvider;
        try {
            metricsProvider = MetricsProviderBootstrap.startMetricsProvider(
                config.getMetricsProviderClassName(),
                config.getMetricsProviderConfiguration());
        } catch (MetricsProviderLifeCycleException error) {
            throw new IOException("Cannot boot MetricsProvider " + config.getMetricsProviderClassName(), error);
        }
        try {
            ServerMetrics.metricsProviderInitialized(metricsProvider);
            ProviderRegistry.initialize();
            ServerCnxnFactory cnxnFactory = null;
            ServerCnxnFactory secureCnxnFactory = null;

            if (config.getClientPortAddress() != null) {
                cnxnFactory = ServerCnxnFactory.createFactory();
                cnxnFactory.configure(config.getClientPortAddress(), config.getMaxClientCnxns(), config.getClientPortListenBacklog(), false);
            }

            if (config.getSecureClientPortAddress() != null) {
                secureCnxnFactory = ServerCnxnFactory.createFactory();
                secureCnxnFactory.configure(config.getSecureClientPortAddress(), config.getMaxClientCnxns(), config.getClientPortListenBacklog(), true);
            }

            quorumPeer = getQuorumPeer();
            quorumPeer.setTxnFactory(new FileTxnSnapLog(config.getDataLogDir(), config.getDataDir()));
            quorumPeer.enableLocalSessions(config.areLocalSessionsEnabled());
            quorumPeer.enableLocalSessionsUpgrading(config.isLocalSessionsUpgradingEnabled());
            //quorumPeer.setQuorumPeers(config.getAllMembers());
            quorumPeer.setElectionType(config.getElectionAlg());
            quorumPeer.setMyid(config.getServerId());
            quorumPeer.setTickTime(config.getTickTime());
            quorumPeer.setMinSessionTimeout(config.getMinSessionTimeout());
            quorumPeer.setMaxSessionTimeout(config.getMaxSessionTimeout());
            quorumPeer.setInitLimit(config.getInitLimit());
            quorumPeer.setSyncLimit(config.getSyncLimit());
            quorumPeer.setConnectToLearnerMasterLimit(config.getConnectToLearnerMasterLimit());
            quorumPeer.setObserverMasterPort(config.getObserverMasterPort());
            quorumPeer.setConfigFileName(config.getConfigFilename());
            quorumPeer.setClientPortListenBacklog(config.getClientPortListenBacklog());
            quorumPeer.setMaxClientCnxns(config.getMaxClientCnxns());
            quorumPeer.setZKDatabase(new ZKDatabase(quorumPeer.getTxnFactory()));
            quorumPeer.setQuorumVerifier(config.getQuorumVerifier(), false);
            if (config.getLastSeenQuorumVerifier() != null) {
                quorumPeer.setLastSeenQuorumVerifier(config.getLastSeenQuorumVerifier(), false);
            }
            quorumPeer.initConfigInZKDatabase();
            quorumPeer.setCnxnFactory(cnxnFactory);
            quorumPeer.setSecureCnxnFactory(secureCnxnFactory);
            quorumPeer.setSslQuorum(config.isSslQuorum());
            quorumPeer.setUsePortUnification(config.shouldUsePortUnification());
            quorumPeer.setLearnerType(config.getPeerType());
            quorumPeer.setSyncEnabled(config.getSyncEnabled());
            quorumPeer.setQuorumListenOnAllIPs(config.getQuorumListenOnAllIPs());
            if (config.sslQuorumReloadCertFiles) {
                quorumPeer.getX509Util().enableCertFileReloading();
            }
            quorumPeer.setMultiAddressEnabled(config.isMultiAddressEnabled());
            quorumPeer.setMultiAddressReachabilityCheckEnabled(config.isMultiAddressReachabilityCheckEnabled());
            quorumPeer.setMultiAddressReachabilityCheckTimeoutMs(config.getMultiAddressReachabilityCheckTimeoutMs());

            // sets quorum sasl authentication configurations
            quorumPeer.setQuorumSaslEnabled(config.quorumEnableSasl);
            if (quorumPeer.isQuorumSaslAuthEnabled()) {
                quorumPeer.setQuorumServerSaslRequired(config.quorumServerRequireSasl);
                quorumPeer.setQuorumLearnerSaslRequired(config.quorumLearnerRequireSasl);
                quorumPeer.setQuorumServicePrincipal(config.quorumServicePrincipal);
                quorumPeer.setQuorumServerLoginContext(config.quorumServerLoginContext);
                quorumPeer.setQuorumLearnerLoginContext(config.quorumLearnerLoginContext);
            }
            quorumPeer.setQuorumCnxnThreadsSize(config.quorumCnxnThreadsSize);
            quorumPeer.initialize();

            if (config.jvmPauseMonitorToRun) {
                quorumPeer.setJvmPauseMonitor(new JvmPauseMonitor(config));
            }

            quorumPeer.start();
            ZKAuditProvider.addZKStartStopAuditLog();
            quorumPeer.join();
        } catch (InterruptedException e) {
            // warn, but generally this is ok
            LOG.warn("Quorum Peer interrupted", e);
        } finally {
            try {
                metricsProvider.stop();
            } catch (Throwable error) {
                LOG.warn("Error while stopping metrics", error);
            }
        }
    }