use of org.apache.pulsar.broker.loadbalance.LeaderElectionService.LeaderListener in project incubator-pulsar by apache.
the class PulsarService method start.
/**
* Start the pulsar service instance.
*/
public void start() throws PulsarServerException {
mutex.lock();
try {
if (state != State.Init) {
throw new PulsarServerException("Cannot start the service once it was stopped");
}
// Now we are ready to start services
localZooKeeperConnectionProvider = new LocalZooKeeperConnectionService(getZooKeeperClientFactory(), config.getZookeeperServers(), config.getZooKeeperSessionTimeoutMillis());
localZooKeeperConnectionProvider.start(shutdownService);
// Initialize and start service to access configuration repository.
this.startZkCacheService();
this.bkClientFactory = getBookKeeperClientFactory();
managedLedgerClientFactory = new ManagedLedgerClientFactory(config, getZkClient(), bkClientFactory);
this.brokerService = new BrokerService(this);
// Start load management service (even if load balancing is disabled)
this.loadManager.set(LoadManager.create(this));
this.startLoadManagementService();
// needs load management service
this.startNamespaceService();
LOG.info("Starting Pulsar Broker service; version: '{}'", (brokerVersion != null ? brokerVersion : "unknown"));
brokerService.start();
this.webService = new WebService(this);
Map<String, Object> attributeMap = Maps.newHashMap();
attributeMap.put(WebService.ATTRIBUTE_PULSAR_NAME, this);
Map<String, Object> vipAttributeMap = Maps.newHashMap();
vipAttributeMap.put(VipStatus.ATTRIBUTE_STATUS_FILE_PATH, this.config.getStatusFilePath());
this.webService.addRestResources("/", VipStatus.class.getPackage().getName(), false, vipAttributeMap);
this.webService.addRestResources("/", "org.apache.pulsar.broker.web", false, attributeMap);
this.webService.addRestResources("/admin", "org.apache.pulsar.broker.admin.v1", true, attributeMap);
this.webService.addRestResources("/admin/v2", "org.apache.pulsar.broker.admin.v2", true, attributeMap);
this.webService.addRestResources("/lookup", "org.apache.pulsar.broker.lookup", true, attributeMap);
this.webService.addServlet("/metrics", new ServletHolder(new PrometheusMetricsServlet(this, config.exposeTopicLevelMetricsInPrometheus())), false, attributeMap);
if (config.isWebSocketServiceEnabled()) {
// Use local broker address to avoid different IP address when using a VIP for service discovery
this.webSocketService = new WebSocketService(new ClusterData(webServiceAddress, webServiceAddressTls, brokerServiceUrl, brokerServiceUrlTls), config);
this.webSocketService.start();
final WebSocketServlet producerWebSocketServlet = new WebSocketProducerServlet(webSocketService);
this.webService.addServlet(WebSocketProducerServlet.SERVLET_PATH, new ServletHolder(producerWebSocketServlet), true, attributeMap);
this.webService.addServlet(WebSocketProducerServlet.SERVLET_PATH_V2, new ServletHolder(producerWebSocketServlet), true, attributeMap);
final WebSocketServlet consumerWebSocketServlet = new WebSocketConsumerServlet(webSocketService);
this.webService.addServlet(WebSocketConsumerServlet.SERVLET_PATH, new ServletHolder(consumerWebSocketServlet), true, attributeMap);
this.webService.addServlet(WebSocketConsumerServlet.SERVLET_PATH_V2, new ServletHolder(consumerWebSocketServlet), true, attributeMap);
final WebSocketServlet readerWebSocketServlet = new WebSocketReaderServlet(webSocketService);
this.webService.addServlet(WebSocketReaderServlet.SERVLET_PATH, new ServletHolder(readerWebSocketServlet), true, attributeMap);
this.webService.addServlet(WebSocketReaderServlet.SERVLET_PATH_V2, new ServletHolder(readerWebSocketServlet), true, attributeMap);
}
if (LOG.isDebugEnabled()) {
LOG.debug("Attempting to add static directory");
}
this.webService.addStaticResources("/static", "/static");
// Register heartbeat and bootstrap namespaces.
this.nsservice.registerBootstrapNamespaces();
// Start the leader election service
this.leaderElectionService = new LeaderElectionService(this, new LeaderListener() {
@Override
public synchronized void brokerIsTheLeaderNow() {
if (getConfiguration().isLoadBalancerEnabled()) {
long loadSheddingInterval = TimeUnit.MINUTES.toMillis(getConfiguration().getLoadBalancerSheddingIntervalMinutes());
long resourceQuotaUpdateInterval = TimeUnit.MINUTES.toMillis(getConfiguration().getLoadBalancerResourceQuotaUpdateIntervalMinutes());
loadSheddingTask = loadManagerExecutor.scheduleAtFixedRate(new LoadSheddingTask(loadManager), loadSheddingInterval, loadSheddingInterval, TimeUnit.MILLISECONDS);
loadResourceQuotaTask = loadManagerExecutor.scheduleAtFixedRate(new LoadResourceQuotaUpdaterTask(loadManager), resourceQuotaUpdateInterval, resourceQuotaUpdateInterval, TimeUnit.MILLISECONDS);
}
}
@Override
public synchronized void brokerIsAFollowerNow() {
if (loadSheddingTask != null) {
loadSheddingTask.cancel(false);
loadSheddingTask = null;
}
if (loadResourceQuotaTask != null) {
loadResourceQuotaTask.cancel(false);
loadResourceQuotaTask = null;
}
}
});
leaderElectionService.start();
webService.start();
this.metricsGenerator = new MetricsGenerator(this);
schemaRegistryService = SchemaRegistryService.create(this);
state = State.Started;
acquireSLANamespace();
LOG.info("messaging service is ready, bootstrap service on port={}, broker url={}, cluster={}, configs={}", config.getWebServicePort(), brokerServiceUrl, config.getClusterName(), ReflectionToStringBuilder.toString(config));
} catch (Exception e) {
LOG.error(e.getMessage(), e);
throw new PulsarServerException(e);
} finally {
mutex.unlock();
}
}
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