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

java.lang.Object
  org.apache.hadoop.hive.common.metrics.Metrics.MetricsScope

Enclosing class:

Metrics

public class Metrics.MetricsScope
extends 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

void	close() Closes scope, and records the time taken
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

open

public void open()
          throws IOException

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

Throws:

IOException

close

public void close()
           throws IOException

Closes scope, and records the time taken

Throws:

IOException

reopen

public void reopen()
            throws IOException

Closes scope if open, and reopens it

Throws:

IOException