divijvaidya commented on code in PR #13820: URL: https://github.com/apache/kafka/pull/13820#discussion_r1224085374
########## server-common/src/main/java/org/apache/kafka/server/util/timer/SystemTimer.java: ########## @@ -0,0 +1,112 @@ +/* + * 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.kafka.server.util.timer; + +import org.apache.kafka.common.utils.KafkaThread; +import org.apache.kafka.common.utils.Time; + +import java.util.concurrent.DelayQueue; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicInteger; +import java.util.concurrent.locks.ReentrantReadWriteLock; + +public class SystemTimer implements Timer { + // timeout timer + private final ExecutorService taskExecutor; + private final DelayQueue<TimerTaskList> delayQueue; + private final AtomicInteger taskCounter; + private final TimingWheel timingWheel; + + // Locks used to protect data structures while ticking + private final ReentrantReadWriteLock readWriteLock = new ReentrantReadWriteLock(); + private final ReentrantReadWriteLock.ReadLock readLock = readWriteLock.readLock(); + private final ReentrantReadWriteLock.WriteLock writeLock = readWriteLock.writeLock(); + + public SystemTimer(String executorName) { + this(executorName, 1, 20, Time.SYSTEM.hiResClockMs()); + } + + public SystemTimer( + String executorName, + long tickMs, + int wheelSize, + long startMs + ) { + this.taskExecutor = Executors.newFixedThreadPool(1, + runnable -> KafkaThread.nonDaemon("executor-" + executorName, runnable)); + this.delayQueue = new DelayQueue<>(); + this.taskCounter = new AtomicInteger(0); + this.timingWheel = new TimingWheel( + tickMs, + wheelSize, + startMs, + taskCounter, + delayQueue + ); + } + + public void add(TimerTask timerTask) { + readLock.lock(); Review Comment: ok -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
