org.apache.hadoop.chukwa.datacollection.adaptor.filetailer

Class RCheckFTAdaptor

java.lang.Object

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

org.apache.hadoop.chukwa.datacollection.adaptor.filetailer.LWFTAdaptor

org.apache.hadoop.chukwa.datacollection.adaptor.filetailer.RCheckFTAdaptor

All Implemented Interfaces:

FileFilter, Adaptor

public class RCheckFTAdaptor
extends LWFTAdaptor
implements FileFilter

Checkpoint state: date modified of most-recently tailed file, offset of first byte of that file, then regular FTA arts

Field Summary

Fields inherited from class org.apache.hadoop.chukwa.datacollection.adaptor.filetailer.LWFTAdaptor

DEFAULT_MAX_READ_SIZE, MAX_READ_SIZE_OPT

Constructor Summary

Constructors

Constructor and Description
RCheckFTAdaptor()

Method Summary

Modifier and Type	Method and Description
boolean	accept(File pathname)
String	getCurrentStatus() Return the adaptor's state Should not include class name or byte offset, which are written by caller.
String	parseArgs(String params) Check for date-modified and offset; if absent assume we just got a name.
void	start(long offset)
boolean	tailFile()
String	toString()

Methods inherited from class org.apache.hadoop.chukwa.datacollection.adaptor.filetailer.LWFTAdaptor

getStreamName, shutdown

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, wait, wait, wait

Constructor Detail

RCheckFTAdaptor

public RCheckFTAdaptor()

Method Detail

parseArgs

public String parseArgs(String params)

Check for date-modified and offset; if absent assume we just got a name.

Overrides:

parseArgs in class LWFTAdaptor

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.

Specified by:

getCurrentStatus in interface Adaptor

Overrides:

getCurrentStatus in class LWFTAdaptor

Returns:

the adaptor state as a string

See Also:

Adaptor.getCurrentStatus()

accept

public boolean accept(File pathname)

Specified by:

accept in interface FileFilter

start

public void start(long offset)

Overrides:

start in class LWFTAdaptor

tailFile

public boolean tailFile()
                 throws InterruptedException

Overrides:

tailFile in class LWFTAdaptor

Throws:

InterruptedException

toString

public String toString()

Overrides:

toString in class LWFTAdaptor