com.alibaba.metrics

类 FastCompassImpl

java.lang.Object

com.alibaba.metrics.FastCompassImpl

所有已实现的接口:

FastCompass, Metric

public class FastCompassImpl
extends Object
implements FastCompass

通过1个LongAdder来同时完成count和rt的累加操作 Java里面1个Long有64个bit, 除去最高位表示符号的1个bit，还有63个bit可以使用 在一个不超过60s统计周期内，方法调用的总次数和总次数其实完全用不到63个bit 所以可以将这两个统计项放到一个long里面来表示 这里高位的25个bit表示统计周期内调用总次数，后38位表示总rt Since the total number of method invocation and total time of method execution within a collecting interval never exceed the range a LONG can represent, we can use one LongAdder to record both the total count and total number

构造器概要

构造器

构造器和说明
FastCompassImpl(int bucketInterval)
FastCompassImpl(int bucketInterval, int numberOfBuckets, Clock clock, int maxCategoryCount)

方法概要

限定符和类型	方法和说明
int	getBucketInterval()
Map<String,Map<Long,Long>>	getCountAndRtPerCategory()
Map<String,Map<Long,Long>>	getCountAndRtPerCategory(long startTime)
Map<String,Map<Long,Long>>	getMethodCountPerCategory()
Map<String,Map<Long,Long>>	getMethodCountPerCategory(long startTime)
Map<String,Map<Long,Long>>	getMethodRtPerCategory()
Map<String,Map<Long,Long>>	getMethodRtPerCategory(long startTime)
long	lastUpdateTime()
void	record(long duration, String subCategory)

从类继承的方法 java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

FastCompassImpl

public FastCompassImpl(int bucketInterval)

FastCompassImpl

public FastCompassImpl(int bucketInterval,
                       int numberOfBuckets,
                       Clock clock,
                       int maxCategoryCount)

方法详细资料

record

public void record(long duration,
                   String subCategory)

指定者:

record 在接口中 FastCompass

getMethodCountPerCategory

public Map<String,Map<Long,Long>> getMethodCountPerCategory()

指定者:

getMethodCountPerCategory 在接口中 FastCompass

getMethodRtPerCategory

public Map<String,Map<Long,Long>> getMethodRtPerCategory()

指定者:

getMethodRtPerCategory 在接口中 FastCompass

getMethodCountPerCategory

public Map<String,Map<Long,Long>> getMethodCountPerCategory(long startTime)

指定者:

getMethodCountPerCategory 在接口中 FastCompass

getMethodRtPerCategory

public Map<String,Map<Long,Long>> getMethodRtPerCategory(long startTime)

指定者:

getMethodRtPerCategory 在接口中 FastCompass

getBucketInterval

public int getBucketInterval()

指定者:

getBucketInterval 在接口中 FastCompass

getCountAndRtPerCategory

public Map<String,Map<Long,Long>> getCountAndRtPerCategory()

指定者:

getCountAndRtPerCategory 在接口中 FastCompass

getCountAndRtPerCategory

public Map<String,Map<Long,Long>> getCountAndRtPerCategory(long startTime)

指定者:

getCountAndRtPerCategory 在接口中 FastCompass

lastUpdateTime

public long lastUpdateTime()

指定者:

lastUpdateTime 在接口中 Metric