1 package org.apache.maven.surefire.junitcore.pc;
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.report.ConsoleLogger;
23 import org.apache.maven.surefire.util.internal.DaemonThreadFactory;
24
25 import java.util.concurrent.ExecutorService;
26 import java.util.concurrent.Executors;
27 import java.util.concurrent.ThreadFactory;
28
29 /**
30 * The factory of {@link SchedulingStrategy}.
31 *
32 * @author Tibor Digana (tibor17)
33 * @since 2.16
34 */
35 public class SchedulingStrategies
36 {
37 private static final ThreadFactory DAEMON_THREAD_FACTORY = DaemonThreadFactory.newDaemonThreadFactory();
38
39 /**
40 * @param logger current error logger
41 * @return sequentially executing strategy
42 */
43 public static SchedulingStrategy createInvokerStrategy( ConsoleLogger logger )
44 {
45 return new InvokerStrategy( logger );
46 }
47
48 /**
49 * @param logger current error logger
50 * @param nThreads fixed pool capacity
51 * @return parallel scheduling strategy
52 */
53 public static SchedulingStrategy createParallelStrategy( ConsoleLogger logger, int nThreads )
54 {
55 return new NonSharedThreadPoolStrategy( logger,
56 Executors.newFixedThreadPool( nThreads, DAEMON_THREAD_FACTORY ) );
57 }
58
59 /**
60 * @param logger current error logger
61 * @return parallel scheduling strategy with unbounded capacity
62 */
63 public static SchedulingStrategy createParallelStrategyUnbounded( ConsoleLogger logger )
64 {
65 return new NonSharedThreadPoolStrategy( logger, Executors.newCachedThreadPool( DAEMON_THREAD_FACTORY ) );
66 }
67
68 /**
69 * The <tt>threadPool</tt> passed to this strategy can be shared in other strategies.
70 * <p/>
71 * The call {@link SchedulingStrategy#finished()} is waiting until own tasks have finished.
72 * New tasks will not be scheduled by this call in this strategy. This strategy is not
73 * waiting for other strategies to finish. The {@link org.junit.runners.model.RunnerScheduler#finished()} may
74 * freely use {@link SchedulingStrategy#finished()}.
75 *
76 * @param logger current error logger
77 * @param threadPool thread pool possibly shared with other strategies
78 * @return parallel strategy with shared thread pool
79 * @throws NullPointerException if <tt>threadPool</tt> is null
80 */
81 public static SchedulingStrategy createParallelSharedStrategy( ConsoleLogger logger, ExecutorService threadPool )
82 {
83 if ( threadPool == null )
84 {
85 throw new NullPointerException( "null threadPool in #createParallelSharedStrategy" );
86 }
87 return new SharedThreadPoolStrategy( logger, threadPool );
88 }
89 }