Package org.eclipse.jetty.server.handler

Interface StateTrackingHandler.Listener

All Superinterfaces:

EventListener

Enclosing class:

StateTrackingHandler

public static interface StateTrackingHandler.Listener
extends EventListener

Listener of events emitted by StateTrackingHandler.

The methods of this interface are named after the wrong API usages tracked by StateTrackingHandler.

Method Summary

Modifier and Type	Method	Description
default void	onDemandCallbackBlocked(Request request, StateTrackingHandler.ThreadInfo demandThreadInfo, StateTrackingHandler.ThreadInfo runThreadInfo)	Invoked when the request demand callback run() method blocks for longer than the timeout specified with StateTrackingHandler.getDemandCallbackTimeout().
default void	onHandlerCallbackNotCompleted(Request request, StateTrackingHandler.ThreadInfo handlerThreadInfo)	Invoked when the Handler callback is not completed within the timeout specified with StateTrackingHandler.getHandlerCallbackTimeout().
default void	onHandlerException(Request request, Throwable failure, StateTrackingHandler.ThreadInfo completionThreadInfo)	Invoked when the Handler chain throws an exception from the Request.Handler.handle(Request, Response, Callback) method.
default void	onInvalidHandlerReturnValue(Request request, StateTrackingHandler.ThreadInfo completionThreadInfo)	Invoked when the Handler chain returns false, but the handler callback has been completed.
default void	onWriteBlocked(Request request, StateTrackingHandler.ThreadInfo writeThreadInfo, StateTrackingHandler.ThreadInfo writingThreadInfo)	Invoked when the Response.write(boolean, ByteBuffer, Callback) call blocks for longer than the timeout specified with StateTrackingHandler.getWriteTimeout().
default void	onWriteCallbackBlocked(Request request, Throwable writeFailure, StateTrackingHandler.ThreadInfo writeThreadInfo, StateTrackingHandler.ThreadInfo callbackThreadInfo)	Invoked when the write callback passed to Response.write(boolean, ByteBuffer, Callback) blocks for longer than the timeout specified with StateTrackingHandler.getWriteCallbackTimeout().
default void	onWriteCallbackNotCompleted(Request request, Throwable writeFailure, StateTrackingHandler.ThreadInfo writeThreadInfo)	Invoked when the write callback passed to Response.write(boolean, ByteBuffer, Callback) is not completed for longer than the timeout specified with StateTrackingHandler.getWriteTimeout().

Method Details

onInvalidHandlerReturnValue

default void onInvalidHandlerReturnValue(Request request,
 StateTrackingHandler.ThreadInfo completionThreadInfo)

Invoked when the Handler chain returns false, but the handler callback has been completed.

This event is always enabled.

Parameters:

request - the current request

completionThreadInfo - the StateTrackingHandler.ThreadInfo of the thread that completed the handler callback

onHandlerException

default void onHandlerException(Request request,
 Throwable failure,
 StateTrackingHandler.ThreadInfo completionThreadInfo)

Invoked when the Handler chain throws an exception from the Request.Handler.handle(Request, Response, Callback) method.

This event is always enabled.

Parameters:

request - the current request

failure - the exception thrown

completionThreadInfo - the StateTrackingHandler.ThreadInfo of the thread that completed the handler callback, or null if the handler callback has not been completed

onHandlerCallbackNotCompleted

default void onHandlerCallbackNotCompleted(Request request,
 StateTrackingHandler.ThreadInfo handlerThreadInfo)

Invoked when the Handler callback is not completed within the timeout specified with StateTrackingHandler.getHandlerCallbackTimeout().

This event is enabled only when StateTrackingHandler.getHandlerCallbackTimeout() is non-null.

When handler thread has already returned from the handler chain, the thread info parameter is null. Otherwise, the handler thread has not returned yet and may be blocked, and the thread info parameter is not null.

Note: when present, the thread info stack trace may not be accurate, as the thread blockage might have resolved just before the thread info was taken.

Parameters:

request - the current request

handlerThreadInfo - the handler thread info, or null if the handler thread already returned from the handler chain

onDemandCallbackBlocked

default void onDemandCallbackBlocked(Request request,
 StateTrackingHandler.ThreadInfo demandThreadInfo,
 StateTrackingHandler.ThreadInfo runThreadInfo)

Invoked when the request demand callback run() method blocks for longer than the timeout specified with StateTrackingHandler.getDemandCallbackTimeout().

This event is enabled only when StateTrackingHandler.getDemandCallbackTimeout() is non-null.

Note: the thread info stack trace of the thread that is running the demand callback may not be accurate, as the thread blockage might have resolved just before the thread info was taken.

Parameters:

request - the current request

demandThreadInfo - the thread info of the thread that called Request.demand(Runnable)

runThreadInfo - the thread info of the thread running the demand callback

onWriteBlocked

default void onWriteBlocked(Request request,
 StateTrackingHandler.ThreadInfo writeThreadInfo,
 StateTrackingHandler.ThreadInfo writingThreadInfo)

Invoked when the Response.write(boolean, ByteBuffer, Callback) call blocks for longer than the timeout specified with StateTrackingHandler.getWriteTimeout().

This event is enabled only when StateTrackingHandler.getWriteTimeout() is non-null.

Note: the thread info stack trace of the thread that is writing may not be accurate, as the thread blockage might have resolved just before the thread info was taken.

Parameters:

request - the current request

writeThreadInfo - the thread info of the thread that called Response.write(boolean, ByteBuffer, Callback)

writingThreadInfo - the thread info of the thread tht is writing

onWriteCallbackNotCompleted

default void onWriteCallbackNotCompleted(Request request,
 Throwable writeFailure,
 StateTrackingHandler.ThreadInfo writeThreadInfo)

Invoked when the write callback passed to Response.write(boolean, ByteBuffer, Callback) is not completed for longer than the timeout specified with StateTrackingHandler.getWriteTimeout().

This event is enabled only when StateTrackingHandler.getWriteTimeout() is non-null.

Note that the write might have been fully performed, but since the callback is not completed, this case is indistinguishable from the case where the callback is not complete because the write has not been fully performed.

Parameters:

request - the current request

writeFailure - the write failure, or null if the write succeeded

writeThreadInfo - the thread info of the thread that called Response.write(boolean, ByteBuffer, Callback)

onWriteCallbackBlocked

default void onWriteCallbackBlocked(Request request,
 Throwable writeFailure,
 StateTrackingHandler.ThreadInfo writeThreadInfo,
 StateTrackingHandler.ThreadInfo callbackThreadInfo)

Invoked when the write callback passed to Response.write(boolean, ByteBuffer, Callback) blocks for longer than the timeout specified with StateTrackingHandler.getWriteCallbackTimeout().

This event is enabled only when StateTrackingHandler.getWriteCallbackTimeout() is non-null.

Note: the thread info stack trace of the thread that is running the write callback may not be accurate, as the thread blockage might have resolved just before the thread info was taken.

Parameters:

request - the current request

writeFailure - the write failure, or null if the write succeeded

writeThreadInfo - the thread info of the thread that called Response.write(boolean, ByteBuffer, Callback)

callbackThreadInfo - the thread info of the thread invoking the write callback