本文整理汇总了Java中org.apache.hadoop.metrics2.util.Quantile类的典型用法代码示例。如果您正苦于以下问题：Java Quantile类的具体用法？Java Quantile怎么用？Java Quantile使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
Quantile类属于org.apache.hadoop.metrics2.util包，在下文中一共展示了Quantile类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: assertQuantileGauges
import org.apache.hadoop.metrics2.util.Quantile; //导入依赖的package包/类
/**
* Asserts that the NumOps and quantiles for a metric have been changed at
* some point to a non-zero value.
*
* @param prefix of the metric
* @param rb MetricsRecordBuilder with the metric
*/
public static void assertQuantileGauges(String prefix,
MetricsRecordBuilder rb) {
verify(rb).addGauge(eqName(info(prefix + "NumOps", "")), geq(0l));
for (Quantile q : MutableQuantiles.quantiles) {
String nameTemplate = prefix + "%dthPercentileLatency";
int percentile = (int) (100 * q.quantile);
verify(rb).addGauge(
eqName(info(String.format(nameTemplate, percentile), "")),
geq(0l));
}
}
示例2: testMutableQuantilesError
import org.apache.hadoop.metrics2.util.Quantile; //导入依赖的package包/类
/**
* Ensure that quantile estimates from {@link MutableQuantiles} are within
* specified error bounds.
*/
@Test(timeout = 30000)
public void testMutableQuantilesError() throws Exception {
MetricsRecordBuilder mb = mockMetricsRecordBuilder();
MetricsRegistry registry = new MetricsRegistry("test");
// Use a 5s rollover period
MutableQuantiles quantiles = registry.newQuantiles("foo", "stat", "Ops",
"Latency", 5);
// Push some values in and wait for it to publish
long start = System.nanoTime() / 1000000;
for (long i = 1; i <= 1000; i++) {
quantiles.add(i);
quantiles.add(1001 - i);
}
long end = System.nanoTime() / 1000000;
Thread.sleep(6000 - (end - start));
registry.snapshot(mb, false);
// Print out the snapshot
Map<Quantile, Long> previousSnapshot = quantiles.previousSnapshot;
for (Entry<Quantile, Long> item : previousSnapshot.entrySet()) {
System.out.println(String.format("Quantile %.2f has value %d",
item.getKey().quantile, item.getValue()));
}
// Verify the results are within our requirements
verify(mb).addGauge(
info("FooNumOps", "Number of ops for stat with 5s interval"),
(long) 2000);
Quantile[] quants = MutableQuantiles.quantiles;
String name = "Foo%dthPercentileLatency";
String desc = "%d percentile latency with 5 second interval for stat";
for (Quantile q : quants) {
int percentile = (int) (100 * q.quantile);
int error = (int) (1000 * q.error);
String n = String.format(name, percentile);
String d = String.format(desc, percentile);
long expected = (long) (q.quantile * 1000);
verify(mb).addGauge(eq(info(n, d)), leq(expected + error));
verify(mb).addGauge(eq(info(n, d)), geq(expected - error));
}
}