org.htmlunit.javascript.background

Interface JavaScriptJobManager

All Superinterfaces:

Serializable

public interface JavaScriptJobManager
extends Serializable

A manager for JavaScriptJobs.

Author:

Daniel Gredler, Ronald Brill

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	JavaScriptJobManager.JavaScriptJobFilter Simple filter interface.

Method Summary

Modifier and Type	Method and Description
int	addJob(JavaScriptJob job, Page page) Adds the specified job to this job manager, assigning it an ID.
JavaScriptJob	getEarliestJob() Gets the earliest job for this manager.
JavaScriptJob	getEarliestJob(JavaScriptJobManager.JavaScriptJobFilter filter) Gets the earliest job for this manager.
int	getJobCount() Returns the number of active jobs, including jobs that are currently executing and jobs that are waiting to execute.
int	getJobCount(JavaScriptJobManager.JavaScriptJobFilter filter) Returns the number of active jobs, including jobs that are currently executing and jobs that are waiting to execute.
String	jobStatusDump(JavaScriptJobManager.JavaScriptJobFilter filter) INTERNAL API - SUBJECT TO CHANGE AT ANY TIME - USE AT YOUR OWN RISK.
void	removeAllJobs() Removes all jobs from the execution queue.
void	removeJob(int id) Removes the specified job from the execution queue.
boolean	runSingleJob(JavaScriptJob job) Runs the provided job if it is the right time for it.
void	shutdown() Shuts down this job manager and stops all of its jobs.
void	stopJob(int id) Stops the specified job and removes it from the execution queue, not even allowing the job to finish if it is currently executing.
int	waitForJobs(long timeoutMillis) Blocks until all active jobs have finished executing.
int	waitForJobsStartingBefore(long delayMillis) Blocks until all jobs scheduled to start executing before (now + delayMillis) have finished executing.
int	waitForJobsStartingBefore(long delayMillis, JavaScriptJobManager.JavaScriptJobFilter filter) Blocks until all jobs scheduled to start executing before (now + delayMillis) have finished executing.

Method Detail

getJobCount

int getJobCount()

Returns the number of active jobs, including jobs that are currently executing and jobs that are waiting to execute.

Returns:

the number of active jobs

getJobCount

int getJobCount(JavaScriptJobManager.JavaScriptJobFilter filter)

Returns the number of active jobs, including jobs that are currently executing and jobs that are waiting to execute. Only jobs passing the filter are counted.

Parameters:

filter - the JavaScriptJobFilter

Returns:

the number of active jobs

addJob

int addJob(JavaScriptJob job,
           Page page)

Adds the specified job to this job manager, assigning it an ID. If the specified page is not currently loaded in the window which owns this job manager, the operation fails and this method returns 0.

Parameters:

job - the job to add to the job manager

page - the page which is trying to add the job

Returns:

the ID assigned to the job

removeJob

void removeJob(int id)

Removes the specified job from the execution queue. This doesn't interrupt the job if it is currently running.

Parameters:

id - the ID of the job to be removed from the execution queue

removeAllJobs

void removeAllJobs()

Removes all jobs from the execution queue. This doesn't interrupt any jobs that may be currently running.

stopJob

void stopJob(int id)

Stops the specified job and removes it from the execution queue, not even allowing the job to finish if it is currently executing.

Parameters:

id - the ID of the job to be stopped

waitForJobs

int waitForJobs(long timeoutMillis)

Blocks until all active jobs have finished executing. If a job is scheduled to begin executing after (now + timeoutMillis), this method will wait for timeoutMillis milliseconds and then return false.

Parameters:

timeoutMillis - the maximum amount of time to wait (in milliseconds); may be negative, in which case this method returns immediately

Returns:

the number of background JavaScript jobs still executing or waiting to be executed when this method returns; will be 0 if there are no jobs left to execute

waitForJobsStartingBefore

int waitForJobsStartingBefore(long delayMillis)

Blocks until all jobs scheduled to start executing before (now + delayMillis) have finished executing. If there is no background JavaScript task currently executing, and there is no background JavaScript task scheduled to start executing within the specified time, this method returns immediately -- even if there are tasks scheduled to be executed after (now + delayMillis).

Parameters:

delayMillis - the delay which determines the background tasks to wait for (in milliseconds); may be negative, as it is relative to the current time

Returns:

the number of background JavaScript jobs still executing or waiting to be executed when this method returns; will be 0 if there are no jobs left to execute

waitForJobsStartingBefore

int waitForJobsStartingBefore(long delayMillis,
                              JavaScriptJobManager.JavaScriptJobFilter filter)

Blocks until all jobs scheduled to start executing before (now + delayMillis) have finished executing. If there is no background JavaScript task currently executing, and there is no background JavaScript task scheduled to start executing within the specified time, this method returns immediately -- even if there are tasks scheduled to be executed after (now + delayMillis).

Parameters:

delayMillis - the delay which determines the background tasks to wait for (in milliseconds); may be negative, as it is relative to the current time

filter - the JavaScriptJobFilter

Returns:

the number of background JavaScript jobs still executing or waiting to be executed when this method returns; will be 0 if there are no jobs left to execute

shutdown

void shutdown()

Shuts down this job manager and stops all of its jobs.

getEarliestJob

JavaScriptJob getEarliestJob()

Gets the earliest job for this manager.

Returns:

null if none

getEarliestJob

JavaScriptJob getEarliestJob(JavaScriptJobManager.JavaScriptJobFilter filter)

Gets the earliest job for this manager.

Parameters:

filter - the JavaScriptJobFilter

Returns:

null if none

runSingleJob

boolean runSingleJob(JavaScriptJob job)

Runs the provided job if it is the right time for it.

Parameters:

job - the job to run

Returns:

returns true if the job was run.

jobStatusDump

String jobStatusDump(JavaScriptJobManager.JavaScriptJobFilter filter)

INTERNAL API - SUBJECT TO CHANGE AT ANY TIME - USE AT YOUR OWN RISK.
Utility method to report the current job status. Might help some tools.

Parameters:

filter - the JavaScriptJobFilter

Returns:

the job status report as string