atg.endeca.index.admin

Class InMemoryJobQueue

java.lang.Object

atg.nucleus.logging.VariableArgumentApplicationLoggingImpl

atg.nucleus.GenericService

atg.endeca.index.admin.InMemoryJobQueue

All Implemented Interfaces:

atg.core.logging.Logging, atg.core.logging.TraceLogging, JobQueue, atg.naming.AbsoluteNameable, NameContextBindingListener, NameContextElement, atg.naming.NameContextParentable, NameResolver, AdminableService, atg.nucleus.Configured, ApplicationLogging, atg.nucleus.logging.ApplicationLoggingSender, atg.nucleus.logging.TraceApplicationLogging, VariableArgumentApplicationLogging, ComponentNameResolver, Service, ServiceListener, Schedulable, java.util.EventListener

public class InMemoryJobQueue
extends GenericService
implements JobQueue, Schedulable

A simple component which implements JobQueue interface.

It stores IndexingJob object in memory only. So after server restarts, the job queue will be empty. The component tries to start indexing jobs when a running indexing job finishes. It also allows restarting of indexing jobs from the queue periodically (by specifying the schedule property).

Created: January 20 2012

See Also:

JobQueue, SimpleIndexingAdmin

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CLASS_VERSION Class version string
protected ScheduledJob	mScheduledJob

Fields inherited from class atg.nucleus.GenericService

SERVICE_INFO_KEY

Fields inherited from interface atg.nucleus.logging.TraceApplicationLogging

DEFAULT_LOG_TRACE_STATUS

Fields inherited from interface atg.nucleus.logging.ApplicationLogging

DEFAULT_LOG_DEBUG_STATUS, DEFAULT_LOG_ERROR_STATUS, DEFAULT_LOG_INFO_STATUS, DEFAULT_LOG_WARNING_STATUS

Constructor Summary

Constructors

Constructor and Description
InMemoryJobQueue()

Method Summary

Modifier and Type	Method and Description
protected javax.servlet.Servlet	createAdminServlet() Creates and returns a new Servlet that will administer this service.
void	doStartService() This is called after a Service has been created, placed into the naming hierarchy, and initialized with its configured property values.
void	doStopService() This is called when a Service is required to shut down.
void	enqueueJob(IndexingJob pJob, boolean pPriorityJob) Add an indexing job to the queue.
java.lang.String	getJobId(IndexingJob pJob) Generated internal ID for a job.
IndexingJob[]	getQueuedJobs() Returns an array of queued indexing jobs.
Schedule	getSchedule() Returns property schedule.
ScheduledJob	getScheduledJob() Returns property scheduledJob.
Scheduler	getScheduler() Returns property scheduler.
void	performScheduledTask(Scheduler pScheduler, ScheduledJob pJob) Restarts all queued index jobs.
void	processJobQueue() Tries to restart all queued jobs in separate thread (to avoid any blocking issues).
void	removeJob(IndexingJob pJob) Removes indexing job from the queue.
void	removeJob(java.lang.String pJobId) Removes a job from the queue
void	setSchedule(Schedule pSchedule) Sets property schedule.
void	setScheduler(Scheduler pScheduler) Sets property scheduler.
protected void	stopScheduledJob() Stop the specified scheduled job and log any exception.

Methods inherited from class atg.nucleus.GenericService

addLogListener, getAbsoluteName, getAdminServlet, getAdminServletOutputStreamEncoding, getLoggingForVlogging, getLogListenerCount, getLogListeners, getName, getNameContext, getNucleus, getRoot, getServiceConfiguration, getServiceInfo, isAdminServletUseServletOutputStream, isLoggingDebug, isLoggingError, isLoggingInfo, isLoggingTrace, isLoggingWarning, isRunning, logDebug, logDebug, logDebug, logError, logError, logError, logInfo, logInfo, logInfo, logTrace, logTrace, logTrace, logWarning, logWarning, logWarning, nameContextElementBound, nameContextElementUnbound, removeLogListener, reResolveThis, resolveName, resolveName, resolveName, resolveName, sendLogEvent, setAdminServletOutputStreamEncoding, setAdminServletUseServletOutputStream, setLoggingDebug, setLoggingError, setLoggingInfo, setLoggingTrace, setLoggingWarning, setNucleus, setServiceInfo, startService, stopService, toString

Methods inherited from class atg.nucleus.logging.VariableArgumentApplicationLoggingImpl

vlogDebug, vlogDebug, vlogDebug, vlogDebug, vlogDebugTrace, vlogError, vlogError, vlogError, vlogError, vlogInfo, vlogInfo, vlogInfo, vlogInfo, vlogTrace, vlogTrace, vlogTrace, vlogTrace, vlogWarning, vlogWarning, vlogWarning, vlogWarning

Methods inherited from class java.lang.Object

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

Field Detail

CLASS_VERSION

public static java.lang.String CLASS_VERSION

Class version string

mScheduledJob

protected ScheduledJob mScheduledJob

Constructor Detail

InMemoryJobQueue

public InMemoryJobQueue()

Method Detail

setScheduler

public void setScheduler(Scheduler pScheduler)

Sets property scheduler. The scheduler used to enqueue the queued jobs.

getScheduler

public Scheduler getScheduler()

Returns property scheduler. The scheduler used to enqueue the queued jobs.

setSchedule

public void setSchedule(Schedule pSchedule)

Sets property schedule. The schedule to use for restarting the queued jobs.

getSchedule

public Schedule getSchedule()

Returns property schedule. The schedule to use for restarting the queued jobs.

getScheduledJob

public ScheduledJob getScheduledJob()

Returns property scheduledJob. The scheduled job used to restart the queued jobs.

enqueueJob

public void enqueueJob(IndexingJob pJob,
                       boolean pPriorityJob)
                throws IndexingException

Add an indexing job to the queue.

Specified by:

enqueueJob in interface JobQueue

Parameters:

pJob - an indexing job to add

pPriorityJob - true if the job should be dequeued first

Throws:

IndexingException

getQueuedJobs

public IndexingJob[] getQueuedJobs()

Returns an array of queued indexing jobs.

Specified by:

getQueuedJobs in interface JobQueue

getJobId

public java.lang.String getJobId(IndexingJob pJob)

Generated internal ID for a job.

Parameters:

pJob - an indexing job

Returns:

String unique ID of a job

removeJob

public void removeJob(IndexingJob pJob)

Removes indexing job from the queue.

Specified by:

removeJob in interface JobQueue

Parameters:

pJob - a job to be removed

removeJob

public void removeJob(java.lang.String pJobId)

Removes a job from the queue

Parameters:

pJobId - Internal ID of a job which is generated by getJobId(IndexingJob).

processJobQueue

public void processJobQueue()

Tries to restart all queued jobs in separate thread (to avoid any blocking issues).

Specified by:

processJobQueue in interface JobQueue

performScheduledTask

public void performScheduledTask(Scheduler pScheduler,
                                 ScheduledJob pJob)

Restarts all queued index jobs. The method is called by schedule or after finishing another indexing job.

Specified by:

performScheduledTask in interface Schedulable

Parameters:

pScheduler - calling the job

pJob - the ScheduledJob

stopScheduledJob

protected void stopScheduledJob()

Stop the specified scheduled job and log any exception.

doStartService

public void doStartService()
                    throws ServiceException

Description copied from class: GenericService

This is called after a Service has been created, placed into the naming hierarchy, and initialized with its configured property values. The Service should override this method to start any processes it requires.

Overrides:

doStartService in class GenericService

Throws:

ServiceException - if the Service had a problem starting up

doStopService

public void doStopService()
                   throws ServiceException

Description copied from class: GenericService

This is called when a Service is required to shut down. The Service should respond by stopping any processes that it has started.

Overrides:

doStopService in class GenericService

Throws:

ServiceException - if the Service had a problem shutting down

createAdminServlet

protected javax.servlet.Servlet createAdminServlet()

Description copied from class: GenericService

Creates and returns a new Servlet that will administer this service. By default, this creates a ServiceAdminServlet, but subclasses may create their own servlets.

Overrides:

createAdminServlet in class GenericService