Java Code Examples for java.util.concurrent.atomic.DoubleAccumulator

The following examples show how to use java.util.concurrent.atomic.DoubleAccumulator. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
/**
 * accumulates by multiple threads produce correct result
 */
public void testAccumulateAndGetMT() {
    final int incs = 1000000;
    final int nthreads = 4;
    final ExecutorService pool = Executors.newCachedThreadPool();
    DoubleAccumulator a = new DoubleAccumulator(Double::max, 0.0);
    Phaser phaser = new Phaser(nthreads + 1);
    for (int i = 0; i < nthreads; ++i)
        pool.execute(new AccTask(a, phaser, incs));
    phaser.arriveAndAwaitAdvance();
    phaser.arriveAndAwaitAdvance();
    double expected = incs - 1;
    double result = a.get();
    assertEquals(expected, result);
    pool.shutdown();
}
 
Example 2
Source Project: skywalking   Source File: SkywalkingDistributionSummary.java    License: Apache License 2.0 6 votes vote down vote up
protected SkywalkingDistributionSummary(Id id, MeterId meterId, SkywalkingConfig config, Clock clock,
                                        DistributionStatisticConfig distributionStatisticConfig, double scale,
                                        boolean supportsAggregablePercentiles) {
    super(id, clock, distributionStatisticConfig, scale, supportsAggregablePercentiles);

    // meter base name
    String baseName = meterId.getName();

    this.counter = MeterBuilder.buildCounter(meterId.copyTo(baseName + "_count", MeterId.MeterType.COUNTER), config);
    this.sum = MeterBuilder.buildCounter(meterId.copyTo(baseName + "_sum", MeterId.MeterType.COUNTER), config);
    this.maxAdder = new DoubleAccumulator((a, b) -> a > b ? a : b, 0.000);
    this.max = MeterFactory.gauge(meterId.copyTo(baseName + "_max", MeterId.MeterType.GAUGE),
        () -> maxAdder.doubleValue()).build();

    this.histogram = MeterBuilder.buildHistogram(meterId, supportsAggregablePercentiles, distributionStatisticConfig, false);
}
 
Example 3
Source Project: skywalking   Source File: SkywalkingTimer.java    License: Apache License 2.0 6 votes vote down vote up
protected SkywalkingTimer(Id id, MeterId meterId, SkywalkingConfig config, Clock clock,
                          DistributionStatisticConfig distributionStatisticConfig, PauseDetector pauseDetector,
                          TimeUnit baseTimeUnit, boolean supportsAggregablePercentiles) {
    super(id, clock, distributionStatisticConfig, pauseDetector, baseTimeUnit, supportsAggregablePercentiles);

    // meter base name
    String baseName = meterId.getName();

    this.counter = MeterBuilder.buildCounter(meterId.copyTo(baseName + "_count", MeterId.MeterType.COUNTER), config);
    this.sum = MeterBuilder.buildCounter(meterId.copyTo(baseName + "_sum", MeterId.MeterType.COUNTER), config);
    this.maxAdder = new DoubleAccumulator((a, b) -> a > b ? a : b, 0.000);
    this.max = MeterFactory.gauge(meterId.copyTo(baseName + "_max", MeterId.MeterType.GAUGE),
        () -> maxAdder.doubleValue()).build();

    this.histogram = MeterBuilder.buildHistogram(meterId, supportsAggregablePercentiles, distributionStatisticConfig, true);
}
 
Example 4
Source Project: j2objc   Source File: DoubleAccumulatorTest.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * accumulates by multiple threads produce correct result
 */
public void testAccumulateAndGetMT() {
    final int incs = 1000000;
    final int nthreads = 4;
    final ExecutorService pool = Executors.newCachedThreadPool();
    DoubleAccumulator a = new DoubleAccumulator(Double::max, 0.0);
    Phaser phaser = new Phaser(nthreads + 1);
    for (int i = 0; i < nthreads; ++i)
        pool.execute(new AccTask(a, phaser, incs));
    phaser.arriveAndAwaitAdvance();
    phaser.arriveAndAwaitAdvance();
    double expected = incs - 1;
    double result = a.get();
    assertEquals(expected, result);
    pool.shutdown();
}
 
Example 5
Source Project: dragonwell8_jdk   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 6
Source Project: TencentKona-8   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 7
Source Project: native-obfuscator   Source File: Serial.java    License: GNU General Public License v3.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 8
Source Project: jdk8u60   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 9
Source Project: openjdk-jdk8u   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 10
Source Project: openjdk-jdk8u-backup   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 11
Source Project: openjdk-jdk9   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 12
/**
 * accumulate accumulates given value to current, and get returns current value
 */
public void testAccumulateAndGet() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    ai.accumulate(2.0);
    assertEquals(2.0, ai.get());
    ai.accumulate(-4.0);
    assertEquals(2.0, ai.get());
    ai.accumulate(4.0);
    assertEquals(4.0, ai.get());
}
 
Example 13
/**
 * reset() causes subsequent get() to return zero
 */
public void testReset() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    ai.accumulate(2.0);
    assertEquals(2.0, ai.get());
    ai.reset();
    assertEquals(0.0, ai.get());
}
 
Example 14
/**
 * getThenReset() returns current value; subsequent get() returns zero
 */
public void testGetThenReset() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    ai.accumulate(2.0);
    assertEquals(2.0, ai.get());
    assertEquals(2.0, ai.getThenReset());
    assertEquals(0.0, ai.get());
}
 
Example 15
/**
 * toString returns current value.
 */
public void testToString() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    assertEquals("0.0", ai.toString());
    ai.accumulate(1.0);
    assertEquals(Double.toString(1.0), ai.toString());
}
 
Example 16
/**
 * intValue returns current value.
 */
public void testIntValue() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    assertEquals(0, ai.intValue());
    ai.accumulate(1.0);
    assertEquals(1, ai.intValue());
}
 
Example 17
/**
 * longValue returns current value.
 */
public void testLongValue() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    assertEquals(0, ai.longValue());
    ai.accumulate(1.0);
    assertEquals(1, ai.longValue());
}
 
Example 18
/**
 * floatValue returns current value.
 */
public void testFloatValue() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    assertEquals(0.0f, ai.floatValue());
    ai.accumulate(1.0);
    assertEquals(1.0f, ai.floatValue());
}
 
Example 19
/**
 * doubleValue returns current value.
 */
public void testDoubleValue() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    assertEquals(0.0, ai.doubleValue());
    ai.accumulate(1.0);
    assertEquals(1.0, ai.doubleValue());
}
 
Example 20
public void run() {
    phaser.arriveAndAwaitAdvance();
    DoubleAccumulator a = acc;
    for (int i = 0; i < incs; ++i)
        a.accumulate(i);
    result = a.get();
    phaser.arrive();
}
 
Example 21
Source Project: jdk8u-jdk   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 22
Source Project: hottub   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 23
Source Project: openjdk-8-source   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 24
Source Project: openjdk-8   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 25
Source Project: jdk8u_jdk   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 26
Source Project: jdk8u-jdk   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 27
Source Project: jdk8u-dev-jdk   Source File: Serial.java    License: GNU General Public License v2.0 5 votes vote down vote up
static void testDoubleAccumulator() {
    DoubleBinaryOperator plus = (DoubleBinaryOperator & Serializable) (x, y) -> x + y;
    DoubleAccumulator a = new DoubleAccumulator(plus, 13.9d);
    a.accumulate(17.5d);
    DoubleAccumulator result = echo(a);
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value");
    a.reset();
    result.reset();
    if (result.get() != a.get())
        throw new RuntimeException("Unexpected value after reset");

    checkSerialClassName(a, "java.util.concurrent.atomic.DoubleAccumulator$SerializationProxy");
}
 
Example 28
Source Project: j2objc   Source File: DoubleAccumulatorTest.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * accumulate accumulates given value to current, and get returns current value
 */
public void testAccumulateAndGet() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    ai.accumulate(2.0);
    assertEquals(2.0, ai.get());
    ai.accumulate(-4.0);
    assertEquals(2.0, ai.get());
    ai.accumulate(4.0);
    assertEquals(4.0, ai.get());
}
 
Example 29
Source Project: j2objc   Source File: DoubleAccumulatorTest.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * reset() causes subsequent get() to return zero
 */
public void testReset() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    ai.accumulate(2.0);
    assertEquals(2.0, ai.get());
    ai.reset();
    assertEquals(0.0, ai.get());
}
 
Example 30
Source Project: j2objc   Source File: DoubleAccumulatorTest.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * getThenReset() returns current value; subsequent get() returns zero
 */
public void testGetThenReset() {
    DoubleAccumulator ai = new DoubleAccumulator(Double::max, 0.0);
    ai.accumulate(2.0);
    assertEquals(2.0, ai.get());
    assertEquals(2.0, ai.getThenReset());
    assertEquals(0.0, ai.get());
}