org.apache.mina.filter.util

Class ReferenceCountingFilter

java.lang.Object

org.apache.mina.core.filterchain.IoFilterAdapter

org.apache.mina.filter.util.ReferenceCountingFilter

All Implemented Interfaces:

IoFilter

public class ReferenceCountingFilter
extends IoFilterAdapter

An IoFilters wrapper that keeps track of the number of usages of this filter and will call init/destroy when the filter is not in use.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.mina.core.filterchain.IoFilter

IoFilter.NextFilter

Field Summary

Fields

Modifier and Type	Field and Description
private int	count
private IoFilter	filter

Constructor Summary

Constructors

Constructor and Description
ReferenceCountingFilter(IoFilter filter)

Method Summary

Modifier and Type	Method and Description
void	destroy() Invoked by ReferenceCountingFilter when this filter is not used by any IoFilterChain anymore, so you can destroy shared resources.
void	exceptionCaught(IoFilter.NextFilter nextFilter, IoSession session, java.lang.Throwable cause) Filters IoHandler.exceptionCaught(IoSession,Throwable) event.
void	filterClose(IoFilter.NextFilter nextFilter, IoSession session) Filters IoSession.close() method invocation.
void	filterWrite(IoFilter.NextFilter nextFilter, IoSession session, WriteRequest writeRequest) Filters IoSession.write(Object) method invocation.
void	init() Invoked by ReferenceCountingFilter when this filter is added to a IoFilterChain at the first time, so you can initialize shared resources.
void	messageReceived(IoFilter.NextFilter nextFilter, IoSession session, java.lang.Object message) Filters IoHandler.messageReceived(IoSession,Object) event.
void	messageSent(IoFilter.NextFilter nextFilter, IoSession session, WriteRequest writeRequest) Filters IoHandler.messageSent(IoSession,Object) event.
void	onPostAdd(IoFilterChain parent, java.lang.String name, IoFilter.NextFilter nextFilter) Invoked after this filter is added to the specified parent.
void	onPostRemove(IoFilterChain parent, java.lang.String name, IoFilter.NextFilter nextFilter) Invoked after this filter is removed from the specified parent.
void	onPreAdd(IoFilterChain parent, java.lang.String name, IoFilter.NextFilter nextFilter) Invoked before this filter is added to the specified parent.
void	onPreRemove(IoFilterChain parent, java.lang.String name, IoFilter.NextFilter nextFilter) Invoked before this filter is removed from the specified parent.
void	sessionClosed(IoFilter.NextFilter nextFilter, IoSession session) Filters IoHandler.sessionClosed(IoSession) event.
void	sessionCreated(IoFilter.NextFilter nextFilter, IoSession session) Filters IoHandler.sessionCreated(IoSession) event.
void	sessionIdle(IoFilter.NextFilter nextFilter, IoSession session, IdleStatus status) Filters IoHandler.sessionIdle(IoSession,IdleStatus) event.
void	sessionOpened(IoFilter.NextFilter nextFilter, IoSession session) Filters IoHandler.sessionOpened(IoSession) event.

Methods inherited from class org.apache.mina.core.filterchain.IoFilterAdapter

inputClosed, toString

Methods inherited from class java.lang.Object

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

Field Detail

filter

private final IoFilter filter

count

private int count

Constructor Detail

ReferenceCountingFilter

public ReferenceCountingFilter(IoFilter filter)

Method Detail

init

public void init()
          throws java.lang.Exception

Description copied from class: IoFilterAdapter

Invoked by ReferenceCountingFilter when this filter is added to a IoFilterChain at the first time, so you can initialize shared resources. Please note that this method is never called if you don't wrap a filter with ReferenceCountingFilter.

Specified by:

init in interface IoFilter

Overrides:

init in class IoFilterAdapter

Throws:

java.lang.Exception

destroy

public void destroy()
             throws java.lang.Exception

Description copied from class: IoFilterAdapter

Invoked by ReferenceCountingFilter when this filter is not used by any IoFilterChain anymore, so you can destroy shared resources. Please note that this method is never called if you don't wrap a filter with ReferenceCountingFilter.

Specified by:

destroy in interface IoFilter

Overrides:

destroy in class IoFilterAdapter

Throws:

java.lang.Exception

onPreAdd

public void onPreAdd(IoFilterChain parent,
                     java.lang.String name,
                     IoFilter.NextFilter nextFilter)
              throws java.lang.Exception

Description copied from class: IoFilterAdapter

Invoked before this filter is added to the specified parent. Please note that this method can be invoked more than once if this filter is added to more than one parents. This method is not invoked before IoFilter.init() is invoked.

Specified by:

onPreAdd in interface IoFilter

Overrides:

onPreAdd in class IoFilterAdapter

Parameters:

parent - the parent who called this method

name - the name assigned to this filter

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

Throws:

java.lang.Exception

onPostRemove

public void onPostRemove(IoFilterChain parent,
                         java.lang.String name,
                         IoFilter.NextFilter nextFilter)
                  throws java.lang.Exception

Description copied from class: IoFilterAdapter

Invoked after this filter is removed from the specified parent. Please note that this method can be invoked more than once if this filter is removed from more than one parents. This method is always invoked before IoFilter.destroy() is invoked.

Specified by:

onPostRemove in interface IoFilter

Overrides:

onPostRemove in class IoFilterAdapter

Parameters:

parent - the parent who called this method

name - the name assigned to this filter

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

Throws:

java.lang.Exception

exceptionCaught

public void exceptionCaught(IoFilter.NextFilter nextFilter,
                            IoSession session,
                            java.lang.Throwable cause)
                     throws java.lang.Exception

Description copied from class: IoFilterAdapter

Filters IoHandler.exceptionCaught(IoSession,Throwable) event.

Specified by:

exceptionCaught in interface IoFilter

Overrides:

exceptionCaught in class IoFilterAdapter

Parameters:

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

session - The IoSession which has received this event

cause - The exception that cause this event to be received

Throws:

java.lang.Exception

filterClose

public void filterClose(IoFilter.NextFilter nextFilter,
                        IoSession session)
                 throws java.lang.Exception

Description copied from class: IoFilterAdapter

Filters IoSession.close() method invocation.

Specified by:

filterClose in interface IoFilter

Overrides:

filterClose in class IoFilterAdapter

Parameters:

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

session - The IoSession which has to process this method invocation

Throws:

java.lang.Exception

filterWrite

public void filterWrite(IoFilter.NextFilter nextFilter,
                        IoSession session,
                        WriteRequest writeRequest)
                 throws java.lang.Exception

Description copied from class: IoFilterAdapter

Filters IoSession.write(Object) method invocation.

Specified by:

filterWrite in interface IoFilter

Overrides:

filterWrite in class IoFilterAdapter

Parameters:

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

session - The IoSession which has to process this invocation

writeRequest - The WriteRequest to process

Throws:

java.lang.Exception

messageReceived

public void messageReceived(IoFilter.NextFilter nextFilter,
                            IoSession session,
                            java.lang.Object message)
                     throws java.lang.Exception

Description copied from class: IoFilterAdapter

Filters IoHandler.messageReceived(IoSession,Object) event.

Specified by:

messageReceived in interface IoFilter

Overrides:

messageReceived in class IoFilterAdapter

Parameters:

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

session - The IoSession which has received this event

message - The received message

Throws:

java.lang.Exception

messageSent

public void messageSent(IoFilter.NextFilter nextFilter,
                        IoSession session,
                        WriteRequest writeRequest)
                 throws java.lang.Exception

Description copied from class: IoFilterAdapter

Filters IoHandler.messageSent(IoSession,Object) event.

Specified by:

messageSent in interface IoFilter

Overrides:

messageSent in class IoFilterAdapter

Parameters:

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

session - The IoSession which has received this event

writeRequest - The WriteRequest that contains the sent message

Throws:

java.lang.Exception

onPostAdd

public void onPostAdd(IoFilterChain parent,
                      java.lang.String name,
                      IoFilter.NextFilter nextFilter)
               throws java.lang.Exception

Description copied from class: IoFilterAdapter

Invoked after this filter is added to the specified parent. Please note that this method can be invoked more than once if this filter is added to more than one parents. This method is not invoked before IoFilter.init() is invoked.

Specified by:

onPostAdd in interface IoFilter

Overrides:

onPostAdd in class IoFilterAdapter

Parameters:

parent - the parent who called this method

name - the name assigned to this filter

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

Throws:

java.lang.Exception

onPreRemove

public void onPreRemove(IoFilterChain parent,
                        java.lang.String name,
                        IoFilter.NextFilter nextFilter)
                 throws java.lang.Exception

Description copied from class: IoFilterAdapter

Invoked before this filter is removed from the specified parent. Please note that this method can be invoked more than once if this filter is removed from more than one parents. This method is always invoked before IoFilter.destroy() is invoked.

Specified by:

onPreRemove in interface IoFilter

Overrides:

onPreRemove in class IoFilterAdapter

Parameters:

parent - the parent who called this method

name - the name assigned to this filter

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

Throws:

java.lang.Exception

sessionClosed

public void sessionClosed(IoFilter.NextFilter nextFilter,
                          IoSession session)
                   throws java.lang.Exception

Description copied from class: IoFilterAdapter

Filters IoHandler.sessionClosed(IoSession) event.

Specified by:

sessionClosed in interface IoFilter

Overrides:

sessionClosed in class IoFilterAdapter

Parameters:

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

session - The IoSession which has received this event

Throws:

java.lang.Exception

sessionCreated

public void sessionCreated(IoFilter.NextFilter nextFilter,
                           IoSession session)
                    throws java.lang.Exception

Description copied from class: IoFilterAdapter

Filters IoHandler.sessionCreated(IoSession) event.

Specified by:

sessionCreated in interface IoFilter

Overrides:

sessionCreated in class IoFilterAdapter

Parameters:

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

session - The IoSession which has received this event

Throws:

java.lang.Exception

sessionIdle

public void sessionIdle(IoFilter.NextFilter nextFilter,
                        IoSession session,
                        IdleStatus status)
                 throws java.lang.Exception

Description copied from class: IoFilterAdapter

Filters IoHandler.sessionIdle(IoSession,IdleStatus) event.

Specified by:

sessionIdle in interface IoFilter

Overrides:

sessionIdle in class IoFilterAdapter

Parameters:

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

session - The IoSession which has received this event

status - The IdleStatus type

Throws:

java.lang.Exception

sessionOpened

public void sessionOpened(IoFilter.NextFilter nextFilter,
                          IoSession session)
                   throws java.lang.Exception

Description copied from class: IoFilterAdapter

Filters IoHandler.sessionOpened(IoSession) event.

Specified by:

sessionOpened in interface IoFilter

Overrides:

sessionOpened in class IoFilterAdapter

Parameters:

nextFilter - the IoFilter.NextFilter for this filter. You can reuse this object until this filter is removed from the chain.

session - The IoSession which has received this event

Throws:

java.lang.Exception