| /** |
| * 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 kafka.utils |
| |
| import java.util.concurrent._ |
| import java.util.concurrent.atomic._ |
| |
| /** |
| * A scheduler for running jobs in the background |
| * TODO: ScheduledThreadPoolExecutor notriously swallows exceptions |
| */ |
| class KafkaScheduler(val numThreads: Int, val baseThreadName: String, isDaemon: Boolean) extends Logging { |
| private val threadId = new AtomicLong(0) |
| private val executor = new ScheduledThreadPoolExecutor(numThreads, new ThreadFactory() { |
| def newThread(runnable: Runnable): Thread = { |
| val t = new Thread(runnable, baseThreadName + threadId.getAndIncrement) |
| t.setDaemon(isDaemon) |
| t |
| } |
| }) |
| executor.setContinueExistingPeriodicTasksAfterShutdownPolicy(false) |
| executor.setExecuteExistingDelayedTasksAfterShutdownPolicy(false) |
| |
| def scheduleWithRate(fun: () => Unit, delayMs: Long, periodMs: Long) = |
| executor.scheduleAtFixedRate(Utils.loggedRunnable(fun), delayMs, periodMs, TimeUnit.MILLISECONDS) |
| |
| def shutdownNow() { |
| executor.shutdownNow() |
| info("force shutdown scheduler " + baseThreadName) |
| } |
| |
| def shutdown() { |
| executor.shutdown() |
| info("shutdown scheduler " + baseThreadName) |
| } |
| } |