test/tck/ThreadLocalTest.java

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

import junit.framework.*;

public class ThreadLocalTest extends JSR166TestCase {
    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }

    public static Test suite() {
        return new TestSuite(ThreadLocalTest.class);
    }

    static ThreadLocal<Integer> tl = new ThreadLocal<Integer>() {
            public Integer initialValue() {
                return one;
            }
        };

    static InheritableThreadLocal<Integer> itl =
        new InheritableThreadLocal<Integer>() {
            protected Integer initialValue() {
                return zero;
            }

            protected Integer childValue(Integer parentValue) {
                return new Integer(parentValue.intValue() + 1);
            }
        };

    /**
     * remove causes next access to return initial value
     */
    public void testRemove() {
        assertSame(tl.get(), one);
        tl.set(two);
        assertSame(tl.get(), two);
        tl.remove();
        assertSame(tl.get(), one);
    }

    /**
     * remove in InheritableThreadLocal causes next access to return
     * initial value
     */
    public void testRemoveITL() {
        assertSame(itl.get(), zero);
        itl.set(two);
        assertSame(itl.get(), two);
        itl.remove();
        assertSame(itl.get(), zero);
    }

    private class ITLThread extends Thread {
        final int[] x;
        ITLThread(int[] array) { x = array; }
        public void run() {
            Thread child = null;
            if (itl.get().intValue() < x.length - 1) {
                child = new ITLThread(x);
                child.start();
            }
            Thread.yield();

            int threadId = itl.get().intValue();
            for (int j = 0; j < threadId; j++) {
                x[threadId]++;
                Thread.yield();
            }

            if (child != null) { // Wait for child (if any)
                try {
                    child.join();
                } catch (InterruptedException e) {
                    threadUnexpectedException(e);
                }
            }
        }
    }

    /**
     * InheritableThreadLocal propagates generic values.
     */
    public void testGenericITL() throws InterruptedException {
        final int threadCount = 10;
        final int x[] = new int[threadCount];
        Thread progenitor = new ITLThread(x);
        progenitor.start();
        progenitor.join();
        for (int i = 0; i < threadCount; i++) {
            assertEquals(i, x[i]);
        }
    }
}
Revision:	1.14
Committed:	Wed Dec 31 16:44:02 2014 UTC (9 years, 4 months ago) by jsr166
Branch:	MAIN
Changes since 1.13:	+0 -1 lines
Log Message:	remove unused imports
#	User	Rev	Content
1	dl	1.1	/*
2	dl	1.4	* Written by Doug Lea with assistance from members of JCP JSR-166
3			* Expert Group and released to the public domain, as explained at
4	jsr166	1.12	* http://creativecommons.org/publicdomain/zero/1.0/
5	jsr166	1.8	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9			import junit.framework.*;
10
11	dl	1.2	public class ThreadLocalTest extends JSR166TestCase {
12	dl	1.1	public static void main(String[] args) {
13	jsr166	1.9	junit.textui.TestRunner.run(suite());
14	dl	1.1	}
15	jsr166	1.8
16	dl	1.1	public static Test suite() {
17	jsr166	1.9	return new TestSuite(ThreadLocalTest.class);
18	dl	1.1	}
19
20	dl	1.5	static ThreadLocal<Integer> tl = new ThreadLocal<Integer>() {
21			public Integer initialValue() {
22			return one;
23			}
24			};
25
26			static InheritableThreadLocal<Integer> itl =
27			new InheritableThreadLocal<Integer>() {
28			protected Integer initialValue() {
29			return zero;
30			}
31	jsr166	1.8
32	dl	1.5	protected Integer childValue(Integer parentValue) {
33			return new Integer(parentValue.intValue() + 1);
34	dl	1.1	}
35			};
36
37	dl	1.3	/**
38			* remove causes next access to return initial value
39			*/
40	dl	1.1	public void testRemove() {
41	jsr166	1.11	assertSame(tl.get(), one);
42	dl	1.1	tl.set(two);
43	jsr166	1.11	assertSame(tl.get(), two);
44	dl	1.1	tl.remove();
45	jsr166	1.11	assertSame(tl.get(), one);
46	dl	1.5	}
47
48			/**
49			* remove in InheritableThreadLocal causes next access to return
50			* initial value
51			*/
52			public void testRemoveITL() {
53	jsr166	1.11	assertSame(itl.get(), zero);
54	dl	1.5	itl.set(two);
55	jsr166	1.11	assertSame(itl.get(), two);
56	dl	1.5	itl.remove();
57	jsr166	1.11	assertSame(itl.get(), zero);
58	dl	1.5	}
59
60			private class ITLThread extends Thread {
61			final int[] x;
62			ITLThread(int[] array) { x = array; }
63			public void run() {
64			Thread child = null;
65			if (itl.get().intValue() < x.length - 1) {
66			child = new ITLThread(x);
67			child.start();
68			}
69	jsr166	1.13	Thread.yield();
70	jsr166	1.8
71	dl	1.5	int threadId = itl.get().intValue();
72			for (int j = 0; j < threadId; j++) {
73			x[threadId]++;
74	jsr166	1.13	Thread.yield();
75	dl	1.5	}
76	jsr166	1.8
77	dl	1.5	if (child != null) { // Wait for child (if any)
78			try {
79			child.join();
80	jsr166	1.6	} catch (InterruptedException e) {
81	jsr166	1.7	threadUnexpectedException(e);
82	dl	1.5	}
83			}
84			}
85			}
86
87			/**
88			* InheritableThreadLocal propagates generic values.
89			*/
90	jsr166	1.10	public void testGenericITL() throws InterruptedException {
91	dl	1.5	final int threadCount = 10;
92			final int x[] = new int[threadCount];
93			Thread progenitor = new ITLThread(x);
94	jsr166	1.10	progenitor.start();
95			progenitor.join();
96			for (int i = 0; i < threadCount; i++) {
97			assertEquals(i, x[i]);
98	dl	1.5	}
99	dl	1.1	}
100			}