| /* |
| * 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.iotdb.db.rescon; |
| |
| import org.slf4j.Logger; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| |
| public abstract class AbstractPoolManager { |
| |
| private static final int WAIT_TIMEOUT = 2000; |
| |
| protected ExecutorService pool; |
| |
| /** Block new flush submits and exit when all RUNNING THREADS AND TASKS IN THE QUEUE end. */ |
| public void close() { |
| Logger logger = getLogger(); |
| pool.shutdownNow(); |
| long totalWaitTime = WAIT_TIMEOUT; |
| logger.info("Waiting for {} thread pool to shut down.", getName()); |
| while (!pool.isTerminated()) { |
| try { |
| if (!pool.awaitTermination(WAIT_TIMEOUT, TimeUnit.MILLISECONDS)) { |
| logger.info("{} thread pool doesn't exit after {}ms.", getName(), +totalWaitTime); |
| } |
| totalWaitTime += WAIT_TIMEOUT; |
| } catch (InterruptedException e) { |
| logger.error("Interrupted while waiting {} thread pool to exit. ", getName(), e); |
| Thread.currentThread().interrupt(); |
| } |
| } |
| } |
| |
| public synchronized Future<?> submit(Runnable task) { |
| return pool.submit(task); |
| } |
| |
| public synchronized <T> Future<T> submit(Callable<T> task) { |
| return pool.submit(task); |
| } |
| |
| public int getWorkingTasksNumber() { |
| // in ITs, pool may be closed and therefore pool will be null |
| if (pool == null) { |
| return 0; |
| } |
| return ((ThreadPoolExecutor) pool).getActiveCount(); |
| } |
| |
| public int getWaitingTasksNumber() { |
| // in ITs, pool may be closed and therefore pool will be null |
| if (pool == null) { |
| return 0; |
| } |
| return ((ThreadPoolExecutor) pool).getQueue().size(); |
| } |
| |
| public int getTotalTasks() { |
| return getWorkingTasksNumber() + getWaitingTasksNumber(); |
| } |
| |
| public int getCorePoolSize() { |
| if (pool == null) { |
| return 0; |
| } |
| return ((ThreadPoolExecutor) pool).getCorePoolSize(); |
| } |
| |
| public abstract Logger getLogger(); |
| |
| public abstract void start(); |
| |
| public void stop() { |
| if (pool != null) { |
| close(); |
| pool = null; |
| } |
| } |
| |
| public abstract String getName(); |
| } |