Examples with ThreadLocalRandom java8.util.concurrent.ThreadLocalRandom used on opensource projects

Example 21 with ThreadLocalRandom

use of java8.util.concurrent.ThreadLocalRandom in project streamsupport by stefan-zobel.

the class ThreadLocalRandomTest method testBadStreamSize.

/**
 * Invoking sized ints, long, doubles, with negative sizes throws
 * IllegalArgumentException
 */
public void testBadStreamSize() {
    ThreadLocalRandom r = ThreadLocalRandom.current();
    executeAndCatchIAE(() -> r.ints(-1L));
    executeAndCatchIAE(() -> r.ints(-1L, 2, 3));
    executeAndCatchIAE(() -> r.longs(-1L));
    executeAndCatchIAE(() -> r.longs(-1L, -1L, 1L));
    executeAndCatchIAE(() -> r.doubles(-1L));
    executeAndCatchIAE(() -> r.doubles(-1L, .5, .6));
}

Example 22 with ThreadLocalRandom

use of java8.util.concurrent.ThreadLocalRandom in project streamsupport by stefan-zobel.

the class ThreadLocalRandomTest method testUnsizedIntsCount.

/**
 * A parallel unsized stream of ints generates at least 100 values
 */
public void testUnsizedIntsCount() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 100;
    r.ints().limit(size).parallel().forEach(x -> {
        counter.increment();
    });
    assertEquals(counter.sum(), size);
}

Example 23 with ThreadLocalRandom

use of java8.util.concurrent.ThreadLocalRandom in project streamsupport by stefan-zobel.

the class ThreadLocalRandomTest method testIntsCount.

/**
 * A parallel sized stream of ints generates the given number of values
 */
public void testIntsCount() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 0;
    for (int reps = 0; reps < REPS; ++reps) {
        counter.reset();
        r.ints(size).parallel().forEach(x -> {
            counter.increment();
        });
        assertEquals(counter.sum(), size);
        size += 524959;
    }
}

Example 24 with ThreadLocalRandom

use of java8.util.concurrent.ThreadLocalRandom in project streamsupport by stefan-zobel.

the class ThreadLocalRandomTest method testUnsizedLongsCount.

/**
 * A parallel unsized stream of longs generates at least 100 values
 */
public void testUnsizedLongsCount() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 100;
    r.longs().limit(size).parallel().forEach(x -> {
        counter.increment();
    });
    assertEquals(counter.sum(), size);
}

Example 25 with ThreadLocalRandom

use of java8.util.concurrent.ThreadLocalRandom in project streamsupport by stefan-zobel.

the class ThreadLocalRandomTest method testDoublesCount.

/**
 * A parallel sized stream of doubles generates the given number of values
 */
public void testDoublesCount() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 0;
    for (int reps = 0; reps < REPS; ++reps) {
        counter.reset();
        r.doubles(size).parallel().forEach(x -> {
            counter.increment();
        });
        assertEquals(counter.sum(), size);
        size += 524959;
    }
}