org.atmosphere.cpr
Class AtmosphereResourceImpl

java.lang.Object
  org.atmosphere.cpr.AtmosphereResourceImpl

All Implemented Interfaces:

AtmosphereEventLifecycle, AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

public class AtmosphereResourceImpl
extends Object
implements AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>, AtmosphereEventLifecycle

AtmosphereResource implementation for supporting HttpServletRequest and HttpServletResponse.

Author:

Jeanfrancois Arcand

Field Summary

protected AtmosphereServlet.Action	action
protected Broadcaster	broadcaster
protected CometSupport	cometSupport
static String	RESUMED_ON_TIMEOUT

Constructor Summary

AtmosphereResourceImpl(AtmosphereServlet.AtmosphereConfig config, Broadcaster broadcaster, javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res, CometSupport cometSupport)
Create an AtmosphereResource.

Method Summary

AtmosphereServlet.Action	action() Return the AtmosphereServlet.Action which represent the state of the response, e.g.
void	addEventListener(AtmosphereResourceEventListener e) Add a AtmosphereResourceEventListener.
protected static String	createCompatibleStringJunk() Ouput message when Atmosphere suspend a connection.
AtmosphereResourceEventImpl	event()
AtmosphereServlet.AtmosphereConfig	getAtmosphereConfig() Return the AtmosphereServlet.AtmosphereConfig
Broadcaster	getBroadcaster() Return the current Broadcaster
javax.servlet.http.HttpServletRequest	getRequest() Return the underlying Request.
javax.servlet.http.HttpServletResponse	getResponse() Return the underlying Response.
Serializer	getSerializer() Get the Serializer or null if not defined.
protected void	isInScope(boolean isInScope) Protect the object for being used after it got cancelled.
void	notifyListeners() Notify AtmosphereResourceEventListener.
void	notifyListeners(AtmosphereResourceEvent event) Notify AtmosphereResourceEventListener.
void	removeEventListener(AtmosphereResourceEventListener e) Add a AtmosphereResourceEventListener.
void	removeEventListeners() Remove all AtmosphereResourceEventListener.
void	resume() Complete the HttpServletResponse and finish/commit it.
void	setBroadcaster(Broadcaster broadcaster) Set the current Broadcaster
void	setSerializer(Serializer s) Set the Serializer used to write broadcasted object.
void	suspend() Suspend the HttpServletResponse indefinitely.
void	suspend(long timeout) Suspend the HttpServletResponse.
void	suspend(long timeout, boolean flushComment) Suspend the HttpServletResponse.
void	write(OutputStream os, Object o) Write the broadcasted object using the OutputStream.

Methods inherited from class java.lang.Object

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

Field Detail

RESUMED_ON_TIMEOUT

public static final String RESUMED_ON_TIMEOUT

action

protected final AtmosphereServlet.Action action

broadcaster

protected Broadcaster broadcaster

cometSupport

protected final CometSupport cometSupport

Constructor Detail

AtmosphereResourceImpl

public AtmosphereResourceImpl(AtmosphereServlet.AtmosphereConfig config,
                              Broadcaster broadcaster,
                              javax.servlet.http.HttpServletRequest req,
                              javax.servlet.http.HttpServletResponse res,
                              CometSupport cometSupport)

Create an AtmosphereResource.

Parameters:

config -

broadcaster - The Broadcaster.

req - The HttpServletRequest

res - The HttpServletResponse

Method Detail

event

public AtmosphereResourceEventImpl event()

resume

public void resume()

Complete the HttpServletResponse and finish/commit it. If the HttpServletResponse is in the process of being resumed, invoking that method has no effect.

Specified by:

resume in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

suspend

public void suspend()

Suspend the HttpServletResponse indefinitely. Suspending a HttpServletResponse will tell the underlying container to avoid recycling objects associated with the current instance, and also to avoid commiting response. The Framework will output some HTML comments when suspending the response in order to make sure all Browser works well with suspended response.

Specified by:

suspend in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

suspend

public void suspend(long timeout)

Suspend the HttpServletResponse. Suspending a HttpServletResponse will tell the underlying container to avoid recycling objects associated with the current instance, and also to avoid commiting response. Invoking this method when a request is being timed out, e.g. AtmosphereResourceEvent.isResumedOnTimeout() return true, has no effect. The Framework will output some HTML comments when suspending the response in order to make sure all Browser works well with suspended response. By default, the ServletResponse.getWriter() will be used. You can change that behavior by setting a request attribute named org.atmosphere.useStream to so the framework will use ServletResponse.getOutputStream()

Specified by:

suspend in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

Parameters:

timeout - The maximum amount of time, in milliseconds, a HttpServletResponse can be suspended. When the timeout expires (because nothing has been written or because the AtmosphereResource.resume() , the HttpServletResponse will be automatically resumed and commited. Usage of any methods of a HttpServletResponse that times out will throw an IllegalStateException.

suspend

public void suspend(long timeout,
                    boolean flushComment)

Description copied from interface: AtmosphereResource

Suspend the HttpServletResponse. Suspending a HttpServletResponse will tell the underlying container to avoid recycling objects associated with the current instance, and also to avoid commiting response. Invoking this method when a request is being timed out, e.g. AtmosphereResourceEvent.isResumedOnTimeout() return true, has no effect. The Framework will output some HTML comments when suspending the response in order to make sure all Browser works well with suspended response. By default, the ServletResponse.getWriter() will be used. You can change that behavior by setting a request attribute named org.atmosphere.useStream to so the framework will use ServletResponse.getOutputStream()

Specified by:

suspend in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

Parameters:

timeout - The maximum amount of time, in milliseconds, a HttpServletResponse can be suspended. When the timeout expires (because nothing has been written or because the AtmosphereResource.resume() , the HttpServletResponse will be automatically resumed and commited. Usage of any methods of a HttpServletResponse that times out will throw an IllegalStateException.

flushComment - By default, Atmosphere will output some comments to make WebKit based browser working. Set it to false if you want to remove it.

getRequest

public javax.servlet.http.HttpServletRequest getRequest()

Return the underlying Request.

Specified by:

getRequest in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

Returns:

E the underlying Request.

getResponse

public javax.servlet.http.HttpServletResponse getResponse()

Return the underlying Response.

Specified by:

getResponse in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

Returns:

F the underlying Response.

getBroadcaster

public Broadcaster getBroadcaster()

Return the current Broadcaster

Specified by:

getBroadcaster in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

setBroadcaster

public void setBroadcaster(Broadcaster broadcaster)

Set the current Broadcaster

Specified by:

setBroadcaster in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

getAtmosphereConfig

public AtmosphereServlet.AtmosphereConfig getAtmosphereConfig()

Return the AtmosphereServlet.AtmosphereConfig

Specified by:

getAtmosphereConfig in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

Returns:

the AtmosphereServlet.AtmosphereConfig

action

public AtmosphereServlet.Action action()

Return the AtmosphereServlet.Action which represent the state of the response, e.g. suspended, resumed or timedout.

Returns:

the AtmosphereServlet.Action

isInScope

protected void isInScope(boolean isInScope)

Protect the object for being used after it got cancelled.

Parameters:

isInScope -

setSerializer

public void setSerializer(Serializer s)

Set the Serializer used to write broadcasted object.

Specified by:

setSerializer in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

Parameters:

s -

write

public void write(OutputStream os,
                  Object o)
           throws IOException

Write the broadcasted object using the OutputStream. If a Serializer is defined, the operation will be delagated to it. If not, the (Response) OutputStream will be used by calling Object.toString.getBytes()

Specified by:

write in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

Parameters:

os - an OutputStream

o - an instance of {@link

Throws:

IOException

getSerializer

public Serializer getSerializer()

Get the Serializer or null if not defined.

Specified by:

getSerializer in interface AtmosphereResource<javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse>

Returns:

the Serializer or null if not defined.

createCompatibleStringJunk

protected static String createCompatibleStringJunk()

Ouput message when Atmosphere suspend a connection.

Returns:

addEventListener

public void addEventListener(AtmosphereResourceEventListener e)

Add a AtmosphereResourceEventListener.

Specified by:

addEventListener in interface AtmosphereEventLifecycle

Parameters:

e - an instance of AtmosphereResourceEventListener

removeEventListener

public void removeEventListener(AtmosphereResourceEventListener e)

Add a AtmosphereResourceEventListener.

Specified by:

removeEventListener in interface AtmosphereEventLifecycle

Parameters:

e - an instance of AtmosphereResourceEventListener

removeEventListeners

public void removeEventListeners()

Remove all AtmosphereResourceEventListener.

Specified by:

removeEventListeners in interface AtmosphereEventLifecycle

notifyListeners

public void notifyListeners()

Notify AtmosphereResourceEventListener.

Specified by:

notifyListeners in interface AtmosphereEventLifecycle

notifyListeners

public void notifyListeners(AtmosphereResourceEvent event)

Notify AtmosphereResourceEventListener.

Specified by:

notifyListeners in interface AtmosphereEventLifecycle

Parameters:

event - an instance of AtmosphereResourceEvent