File D:\maven-qcr-plugin-testsunitaires\qcr4java\jenkins-master\target\site\qc\core\src\main\java\hudson\model\RunnerStack.java.html

1 /*
2 * The MIT License
3 *
4 * Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 package hudson.model;
25
26 import hudson.model.Run.RunExecution;
27
28 import java.util.Stack;
29 import java.util.Map;
30 import java.util.WeakHashMap;
31
32 /**
33 * Keeps track of {@link RunExecution}s that are currently executing on the given thread
34 * (that can be either an {@link Executor} or threads that are impersonating one.)
35 *
36 * @author Kohsuke Kawaguchi
37 * @since 1.319
38 */
39 final class RunnerStack {
40 private final Map<Executor,Stack<RunExecution>> stack = new WeakHashMap<Executor,Stack<RunExecution>>();
41
42 synchronized void push(RunExecution r) {
43 Executor e = Executor.currentExecutor();
44 Stack<RunExecution> s = stack.get(e);
45 if(s==null) stack.put(e,s=new Stack<RunExecution>());
46 s.push(r);
47 }
48
49 synchronized void pop() {
50 Executor e = Executor.currentExecutor();
51 Stack<RunExecution> s = stack.get(e);
52 s.pop();
53 if(s.isEmpty()) stack.remove(e);
54 }
55
56 synchronized RunExecution peek() {
57 return stack.get(Executor.currentExecutor()).peek();
58 }
59
60 static final RunnerStack INSTANCE = new RunnerStack();
61 }
62