| /* |
| * 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.pulsar.functions.worker; |
| |
| import static org.apache.pulsar.common.util.Runnables.catchingAndLoggingThrowables; |
| import com.google.common.annotations.VisibleForTesting; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| import java.util.function.Supplier; |
| import lombok.Getter; |
| import lombok.Setter; |
| import lombok.extern.slf4j.Slf4j; |
| import org.apache.pulsar.client.util.ExecutorProvider; |
| |
| @Slf4j |
| public class ClusterServiceCoordinator implements AutoCloseable { |
| |
| @Getter |
| @Setter |
| private static class TimerTaskInfo { |
| private long interval; |
| private Runnable task; |
| |
| public TimerTaskInfo(long interval, Runnable task) { |
| this.interval = interval; |
| this.task = task; |
| } |
| } |
| |
| private final String workerId; |
| private final Map<String, TimerTaskInfo> tasks = new HashMap<>(); |
| private final ScheduledExecutorService executor; |
| private final LeaderService leaderService; |
| private final Supplier<Boolean> isLeader; |
| |
| public ClusterServiceCoordinator(String workerId, LeaderService leaderService, Supplier<Boolean> isLeader) { |
| this(workerId, leaderService, isLeader, Executors.newSingleThreadScheduledExecutor( |
| new ExecutorProvider.ExtendedThreadFactory("cluster-service-coordinator-timer"))); |
| } |
| |
| @VisibleForTesting |
| ClusterServiceCoordinator( |
| String workerId, |
| LeaderService leaderService, |
| Supplier<Boolean> isLeader, |
| ScheduledExecutorService executor |
| ) { |
| this.workerId = workerId; |
| this.leaderService = leaderService; |
| this.isLeader = isLeader; |
| this.executor = executor; |
| } |
| |
| public void addTask(String taskName, long interval, Runnable task) { |
| tasks.put(taskName, new TimerTaskInfo(interval, task)); |
| } |
| |
| public void start() { |
| log.info("/** Starting cluster service coordinator **/"); |
| for (Map.Entry<String, TimerTaskInfo> entry : this.tasks.entrySet()) { |
| TimerTaskInfo timerTaskInfo = entry.getValue(); |
| String taskName = entry.getKey(); |
| this.executor.scheduleAtFixedRate(catchingAndLoggingThrowables(() -> { |
| if (isLeader.get()) { |
| try { |
| timerTaskInfo.getTask().run(); |
| } catch (Exception e) { |
| log.error("Cluster timer task {} failed with exception.", taskName, e); |
| } |
| } |
| }), timerTaskInfo.getInterval(), timerTaskInfo.getInterval(), TimeUnit.MILLISECONDS); |
| } |
| } |
| |
| @Override |
| public void close() { |
| log.info("Stopping Cluster Service Coordinator for worker {}", this.workerId); |
| this.executor.shutdown(); |
| log.info("Stopped Cluster Service Coordinator for worker {}", this.workerId); |
| } |
| } |