| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.bookkeeper.stream.server.service; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import lombok.extern.slf4j.Slf4j; |
| import org.apache.bookkeeper.bookie.BookieStateManager; |
| import org.apache.bookkeeper.clients.utils.NetUtils; |
| import org.apache.bookkeeper.common.component.AbstractLifecycleComponent; |
| import org.apache.bookkeeper.conf.ServerConfiguration; |
| import org.apache.bookkeeper.discover.BookieServiceInfo; |
| import org.apache.bookkeeper.discover.RegistrationManager; |
| import org.apache.bookkeeper.discover.ZKRegistrationManager; |
| import org.apache.bookkeeper.net.BookieId; |
| import org.apache.bookkeeper.stats.StatsLogger; |
| import org.apache.bookkeeper.stream.proto.common.Endpoint; |
| import org.apache.bookkeeper.stream.server.conf.BookieConfiguration; |
| |
| /** |
| * A service that manages the registration state for a given server. |
| * |
| * <p>It registers the server to registration service and handle the state transition. |
| */ |
| @Slf4j |
| public class RegistrationStateService |
| extends AbstractLifecycleComponent<BookieConfiguration> { |
| |
| private final Endpoint myEndpoint; |
| private final ServerConfiguration bkServerConf; |
| private final RegistrationServiceProvider regServiceProvider; |
| private RegistrationManager regManager; |
| private BookieStateManager stateManager; |
| |
| public RegistrationStateService(Endpoint myEndpoint, |
| ServerConfiguration bkServerConf, |
| BookieConfiguration bookieConf, |
| RegistrationServiceProvider serviceProvider, |
| StatsLogger statsLogger) { |
| super("registration-state-service", bookieConf, statsLogger); |
| this.myEndpoint = myEndpoint; |
| this.bkServerConf = bkServerConf; |
| this.regServiceProvider = serviceProvider; |
| } |
| |
| @Override |
| protected void doStart() { |
| if (null == regManager) { |
| regManager = new ZKRegistrationManager( |
| bkServerConf, |
| regServiceProvider.getZkClient(), |
| regServiceProvider.getRegistrationPath()); |
| regManager.addRegistrationListener(() -> { |
| if (null == stateManager) { |
| log.warn("Registration state manager is not initialized yet"); |
| return; |
| } |
| stateManager.forceToUnregistered(); |
| // schedule a re-register operation |
| stateManager.registerBookie(false); |
| }); |
| try { |
| stateManager = new BookieStateManager( |
| bkServerConf, |
| statsLogger.scope("state"), |
| regManager, |
| Collections.emptyList(), |
| () -> BookieId.parse(NetUtils.endpointToString(myEndpoint)), |
| BookieServiceInfo.NO_INFO); |
| stateManager.initState(); |
| stateManager.registerBookie(true).get(); |
| log.info("Successfully register myself under registration path {}/{}", |
| regServiceProvider.getRegistrationPath(), NetUtils.endpointToString(myEndpoint)); |
| } catch (Exception e) { |
| throw new RuntimeException("Failed to initialize a registration state service", e); |
| } |
| } |
| } |
| |
| @Override |
| protected void doStop() { |
| if (null == stateManager) { |
| log.info("State Manager is null, no need to stop it."); |
| return; |
| } |
| stateManager.forceToShuttingDown(); |
| |
| // turn the server to readonly during shutting down process |
| |
| stateManager.forceToReadOnly(); |
| } |
| |
| @Override |
| protected void doClose() throws IOException { |
| if (null != stateManager) { |
| stateManager.close(); |
| } |
| if (null != regManager) { |
| regManager.close(); |
| } |
| } |
| } |