spark/launcher/NamedThreadFactory.java

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  *
0009  *    http://www.apache.org/licenses/LICENSE-2.0
0010  *
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017
0018 package org.apache.spark.launcher;
0019
0020 import java.util.concurrent.ThreadFactory;
0021 import java.util.concurrent.atomic.AtomicLong;
0022
0023 class NamedThreadFactory implements ThreadFactory {
0024
0025   private final String nameFormat;
0026   private final AtomicLong threadIds;
0027
0028   NamedThreadFactory(String nameFormat) {
0029     this.nameFormat = nameFormat;
0030     this.threadIds = new AtomicLong();
0031   }
0032
0033   @Override
0034   public Thread newThread(Runnable r) {
0035     Thread t = new Thread(r, String.format(nameFormat, threadIds.incrementAndGet()));
0036     t.setDaemon(true);
0037     return t;
0038   }
0039
0040 }