1 package org.apache.maven.plugin.surefire.booterclient;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.apache.maven.surefire.booter.SystemUtils;
23
24 import java.util.concurrent.Callable;
25 import java.util.concurrent.FutureTask;
26 import java.util.concurrent.RunnableFuture;
27
28 import static org.apache.maven.surefire.util.internal.DaemonThreadFactory.newDaemonThread;
29
30 /**
31 * Loads platform specifics.
32 *
33 * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
34 * @since 2.20.1
35 */
36 public final class Platform
37 {
38 private final RunnableFuture<Long> pidJob;
39
40 public Platform()
41 {
42 // the job may take 50 or 80 ms
43 pidJob = new FutureTask<Long>( pidJob() );
44 newDaemonThread( pidJob ).start();
45 }
46
47 public Long getPid()
48 {
49 try
50 {
51 return pidJob.get();
52 }
53 catch ( Exception e )
54 {
55 return null;
56 }
57 }
58
59 private static Callable<Long> pidJob()
60 {
61 return new Callable<Long>()
62 {
63 @Override
64 public Long call() throws Exception
65 {
66 return SystemUtils.pid();
67 }
68 };
69 }
70 }