org.apache.hadoop.hive.common.metrics

Class Metrics.MetricsScope

java.lang.Object

org.apache.hadoop.hive.common.metrics.Metrics.MetricsScope

Enclosing class:

Metrics

public static class Metrics.MetricsScope
extends java.lang.Object

MetricsScope : A class that encapsulates an idea of a metered scope. Instantiating a named scope and then closing it exposes two counters: (i) a "number of calls" counter ( <name>.n ), and (ii) a "number of msecs spent between scope open and close" counter. ( <name>.t)

Method Summary

Modifier and Type	Method and Description
void	close() Closes scope, and records the time taken
java.lang.Long	getNumCounter()
java.lang.Long	getTimeCounter()
void	open() Opens scope, and makes note of the time started, increments run counter
void	reopen() Closes scope if open, and reopens it

Methods inherited from class java.lang.Object

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

Method Detail

getNumCounter

public java.lang.Long getNumCounter()
                             throws java.io.IOException

Throws:

java.io.IOException

getTimeCounter

public java.lang.Long getTimeCounter()
                              throws java.io.IOException

Throws:

java.io.IOException

open

public void open()
          throws java.io.IOException

Opens scope, and makes note of the time started, increments run counter

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Closes scope, and records the time taken

Throws:

java.io.IOException

reopen

public void reopen()
            throws java.io.IOException

Closes scope if open, and reopens it

Throws:

java.io.IOException