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org.apache.catalina.valves
Class CometConnectionManagerValve

java.lang.Object
  extended by org.apache.catalina.valves.ValveBase
      extended by org.apache.catalina.valves.CometConnectionManagerValve
All Implemented Interfaces:
java.util.EventListener, javax.management.MBeanRegistration, javax.servlet.http.HttpSessionListener, Contained, Lifecycle, LifecycleListener, Valve
public class CometConnectionManagerValve
extends ValveBase
implements Lifecycle, javax.servlet.http.HttpSessionListener, LifecycleListener

Implementation of a Valve that tracks Comet connections, and closes them when the associated session expires or the webapp is reloaded.

This Valve should be attached to a Context.

Author:
Remy Maucherat

Field Summary
protected  java.util.List<Request> cometRequests
          List of current Coment connections.
protected  java.lang.String cometRequestsAttribute
          Name of session attribute used to store list of comet connections.
protected static java.lang.String info
          The descriptive information related to this implementation.
protected  LifecycleSupport lifecycle
          The lifecycle event support for this component.
protected  StringManager sm
          The string manager for this package.
protected  boolean started
          Has this component been started yet?
 
Fields inherited from class org.apache.catalina.valves.ValveBase
container, containerLog, controller, domain, mserver, next, oname
 
Fields inherited from interface org.apache.catalina.Lifecycle
AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, DESTROY_EVENT, INIT_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT
 
Constructor Summary
CometConnectionManagerValve()
           
 
Method Summary
 void addLifecycleListener(LifecycleListener listener)
          Add a lifecycle event listener to this component.
 void event(Request request, Response response, CometEvent event)
          Use events to update the connection state.
 LifecycleListener[] findLifecycleListeners()
          Get the lifecycle listeners associated with this lifecycle.
 java.lang.String getInfo()
          Return descriptive information about this Valve implementation.
 void invoke(Request request, Response response)
          Register requests for tracking, whenever needed.
 void lifecycleEvent(LifecycleEvent event)
          Acknowledge the occurrence of the specified event.
 void removeLifecycleListener(LifecycleListener listener)
          Remove a lifecycle event listener from this component.
 void sessionCreated(javax.servlet.http.HttpSessionEvent se)
          Notification that a session was created.
 void sessionDestroyed(javax.servlet.http.HttpSessionEvent se)
          Notification that a session is about to be invalidated.
 void start()
          Prepare for the beginning of active use of the public methods of this component.
 void stop()
          Gracefully terminate the active use of the public methods of this component.
 
Methods inherited from class org.apache.catalina.valves.ValveBase
backgroundProcess, createObjectName, getContainer, getContainerName, getController, getDomain, getNext, getObjectName, getParentName, postDeregister, postRegister, preDeregister, preRegister, setContainer, setController, setNext, setObjectName, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

info

protected static final java.lang.String info
The descriptive information related to this implementation.

See Also:
Constant Field Values

sm

protected StringManager sm
The string manager for this package.

lifecycle

protected LifecycleSupport lifecycle
The lifecycle event support for this component.

started

protected boolean started
Has this component been started yet?

cometRequests

protected java.util.List<Request> cometRequests
List of current Coment connections.

cometRequestsAttribute

protected java.lang.String cometRequestsAttribute
Name of session attribute used to store list of comet connections.

Constructor Detail

CometConnectionManagerValve

public CometConnectionManagerValve()
Method Detail

addLifecycleListener

public void addLifecycleListener(LifecycleListener listener)
Add a lifecycle event listener to this component.

Specified by:
addLifecycleListener in interface Lifecycle
Parameters:
listener - The listener to add

findLifecycleListeners

public LifecycleListener[] findLifecycleListeners()
Get the lifecycle listeners associated with this lifecycle. If this Lifecycle has no listeners registered, a zero-length array is returned.

Specified by:
findLifecycleListeners in interface Lifecycle

removeLifecycleListener

public void removeLifecycleListener(LifecycleListener listener)
Remove a lifecycle event listener from this component.

Specified by:
removeLifecycleListener in interface Lifecycle
Parameters:
listener - The listener to add

start

public void start()
           throws LifecycleException
Prepare for the beginning of active use of the public methods of this component. This method should be called after configure(), and before any of the public methods of the component are utilized.

Specified by:
start in interface Lifecycle
Throws:
LifecycleException - if this component detects a fatal error that prevents this component from being used

stop

public void stop()
          throws LifecycleException
Gracefully terminate the active use of the public methods of this component. This method should be the last one called on a given instance of this component.

Specified by:
stop in interface Lifecycle
Throws:
LifecycleException - if this component detects a fatal error that needs to be reported

lifecycleEvent

public void lifecycleEvent(LifecycleEvent event)
Description copied from interface: LifecycleListener
Acknowledge the occurrence of the specified event.

Specified by:
lifecycleEvent in interface LifecycleListener
Parameters:
event - LifecycleEvent that has occurred

getInfo

public java.lang.String getInfo()
Return descriptive information about this Valve implementation.

Specified by:
getInfo in interface Valve
Overrides:
getInfo in class ValveBase

invoke

public void invoke(Request request,
                   Response response)
            throws java.io.IOException,
                   javax.servlet.ServletException
Register requests for tracking, whenever needed.

Specified by:
invoke in interface Valve
Specified by:
invoke in class ValveBase
Parameters:
request - The servlet request to be processed
response - The servlet response to be created
Throws:
java.io.IOException - if an input/output error occurs
javax.servlet.ServletException - if a servlet error occurs

event

public void event(Request request,
                  Response response,
                  CometEvent event)
           throws java.io.IOException,
                  javax.servlet.ServletException
Use events to update the connection state.

Specified by:
event in interface Valve
Overrides:
event in class ValveBase
Parameters:
request - The servlet request to be processed
response - The servlet response to be created
Throws:
java.io.IOException - if an input/output error occurs
javax.servlet.ServletException - if a servlet error occurs

sessionCreated

public void sessionCreated(javax.servlet.http.HttpSessionEvent se)
Description copied from interface: javax.servlet.http.HttpSessionListener
Notification that a session was created.

Specified by:
sessionCreated in interface javax.servlet.http.HttpSessionListener
Parameters:
se - the notification event

sessionDestroyed

public void sessionDestroyed(javax.servlet.http.HttpSessionEvent se)
Description copied from interface: javax.servlet.http.HttpSessionListener
Notification that a session is about to be invalidated.

Specified by:
sessionDestroyed in interface javax.servlet.http.HttpSessionListener
Parameters:
se - the notification event
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