org.apache.oozie.service

Class ZKXLogStreamingService

java.lang.Object

org.apache.oozie.service.XLogStreamingService

org.apache.oozie.service.ZKXLogStreamingService

All Implemented Interfaces:

Service, Instrumentable

public class ZKXLogStreamingService
extends XLogStreamingService
implements Service, Instrumentable

Service that performs streaming of log files over Web Services if enabled in XLogService and collates logs from other Oozie servers. Requires that a ZooKeeper ensemble is available.

Field Summary

Fields inherited from interface org.apache.oozie.service.Service

CONF_PREFIX, DEFAULT_LOCK_TIMEOUT, lockTimeout

Constructor Summary

Constructors

Constructor and Description
ZKXLogStreamingService()

Method Summary

Modifier and Type	Method and Description
void	destroy() Destroy the log streaming service.
void	init(Services services) Initialize the log streaming service.
void	instrument(Instrumentation instr) Instruments the log streaming service.
void	streamLog(XLogStreamer logStreamer, Date startTime, Date endTime, Writer writer) Stream the log of a job.

Methods inherited from class org.apache.oozie.service.XLogStreamingService

getInterface, streamLog

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.oozie.service.Service

getInterface

Constructor Detail

ZKXLogStreamingService

public ZKXLogStreamingService()

Method Detail

init

public void init(Services services)
          throws ServiceException

Initialize the log streaming service.

Specified by:

init in interface Service

Overrides:

init in class XLogStreamingService

Parameters:

services - services instance.

Throws:

ServiceException - thrown if the log streaming service could not be initialized.

destroy

public void destroy()

Destroy the log streaming service.

Specified by:

destroy in interface Service

Overrides:

destroy in class XLogStreamingService

instrument

public void instrument(Instrumentation instr)

Instruments the log streaming service.

Specified by:

instrument in interface Instrumentable

Overrides:

instrument in class XLogStreamingService

Parameters:

instr - instrumentation to use.

streamLog

public void streamLog(XLogStreamer logStreamer,
                      Date startTime,
                      Date endTime,
                      Writer writer)
               throws IOException

Stream the log of a job. It contacts any other running Oozie servers to collate relevant logs while streaming.

Overrides:

streamLog in class XLogStreamingService

Parameters:

logStreamer - the log streamer

startTime - start time for log events to filter.

endTime - end time for log events to filter.

writer - writer to stream the log to.

Throws:

IOException - thrown if the log cannot be streamed.