org.directwebremoting.util
Class Continuation

java.lang.Object
  org.directwebremoting.util.Continuation

public class Continuation
extends java.lang.Object

A wrapper around Jetty Ajax Continuations

Author:

Joe Walker [joe at getahead dot ltd dot uk]

Field Summary

protected static java.lang.Class	continuationClass Jetty code used by reflection to allow it to run outside of Jetty
protected static java.lang.reflect.Method	getObject How we get the associated continuation object
protected static boolean	isJetty Are we using Jetty at all?
protected static java.lang.reflect.Method	resumeMethod How we resume the continuation
protected static java.lang.reflect.Method	setObject How we set the associated continuation object
protected static java.lang.reflect.Method	suspendMethod How we suspend the continuation

Constructor Summary

Continuation(javax.servlet.http.HttpServletRequest request)
Fish the Jetty continuation out of the request if it exists

Method Summary

java.lang.Object	getObject() Accessor for the object associated with this continuation
boolean	isAvailable() Are continuations working? If this method returns false then all the other methods will fail.
static boolean	isJetty() Did we find any of the
void	resume() Resume an continuation.
static void	rethrowIfContinuation(java.lang.Throwable th) We shouldn't be catching Jetty RetryRequests so we rethrow them.
void	setObject(java.lang.Object object) Accessor for the object associated with this continuation
void	suspend(long sleepTime) Suspend the thread for a maximum of sleepTime milliseconds

Methods inherited from class java.lang.Object

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

Field Detail

continuationClass

protected static java.lang.Class continuationClass

Jetty code used by reflection to allow it to run outside of Jetty

suspendMethod

protected static java.lang.reflect.Method suspendMethod

How we suspend the continuation

resumeMethod

protected static java.lang.reflect.Method resumeMethod

How we resume the continuation

getObject

protected static java.lang.reflect.Method getObject

How we get the associated continuation object

setObject

protected static java.lang.reflect.Method setObject

How we set the associated continuation object

isJetty

protected static boolean isJetty

Are we using Jetty at all?

Constructor Detail

Continuation

public Continuation(javax.servlet.http.HttpServletRequest request)

Fish the Jetty continuation out of the request if it exists

Parameters:

request - The http request

Method Detail

isAvailable

public boolean isAvailable()

Are continuations working? If this method returns false then all the other methods will fail.

Returns:

true if Jetty continuations are working

suspend

public void suspend(long sleepTime)
             throws java.lang.Exception

Suspend the thread for a maximum of sleepTime milliseconds

Parameters:

sleepTime - The maximum time to wait

Throws:

java.lang.Exception - If reflection breaks

resume

public void resume()
            throws java.lang.Exception

Resume an continuation. For Jetty this does not work like a real continuation because it restarts the http request.

Throws:

java.lang.Exception - If reflection breaks

getObject

public java.lang.Object getObject()
                           throws java.lang.Exception

Accessor for the object associated with this continuation

Returns:

the object associated with this continuation

Throws:

java.lang.Exception - If reflection breaks

setObject

public void setObject(java.lang.Object object)
               throws java.lang.Exception

Accessor for the object associated with this continuation

Parameters:

object - the object associated with this continuation

Throws:

java.lang.Exception - If reflection breaks

rethrowIfContinuation

public static void rethrowIfContinuation(java.lang.Throwable th)

We shouldn't be catching Jetty RetryRequests so we rethrow them.

Parameters:

th - The exception to test for continuation-ness

isJetty

public static boolean isJetty()

Did we find any of the

Returns: