org.apache.hadoop.chukwa.datacollection.adaptor

Class HeartbeatAdaptor

java.lang.Object

org.apache.hadoop.chukwa.datacollection.adaptor.AbstractAdaptor

org.apache.hadoop.chukwa.datacollection.adaptor.HeartbeatAdaptor

All Implemented Interfaces:

Adaptor

public class HeartbeatAdaptor
extends AbstractAdaptor

Constructor Summary

Constructors

Constructor and Description
HeartbeatAdaptor()

Method Summary

Modifier and Type	Method and Description
String	getCurrentStatus() Return the adaptor's state Should not include class name or byte offset, which are written by caller.
String	parseArgs(String s)
long	shutdown(AdaptorShutdownPolicy shutdownPolicy) Signals this adaptor to come to an orderly stop.
void	start(long offset)

Methods inherited from class org.apache.hadoop.chukwa.datacollection.adaptor.AbstractAdaptor

deregisterAndStop, getType, hardStop, parseArgs, shutdown, start

Methods inherited from class java.lang.Object

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

Constructor Detail

HeartbeatAdaptor

public HeartbeatAdaptor()

Method Detail

getCurrentStatus

public String getCurrentStatus()

Description copied from interface: Adaptor

Return the adaptor's state Should not include class name or byte offset, which are written by caller. The datatype should, however, be written by this method.

Returns:

the adaptor state as a string

shutdown

public long shutdown(AdaptorShutdownPolicy shutdownPolicy)
              throws AdaptorException

Description copied from interface: Adaptor

Signals this adaptor to come to an orderly stop. The adaptor ought to push out all the data it can before exiting depending of the shutdown policy

Parameters:

shutdownPolicy - is defined as forcefully or gracefully

Returns:

the logical offset at which the adaptor was when the method return

Throws:

AdaptorException - Exception on shutdown

start

public void start(long offset)
           throws AdaptorException

Specified by:

start in class AbstractAdaptor

Throws:

AdaptorException

parseArgs

public String parseArgs(String s)

Specified by:

parseArgs in class AbstractAdaptor