org.activeio.filter
Class SynchornizedAsyncChannel

java.lang.Object
  org.activeio.FilterAsyncChannel
      org.activeio.filter.SynchornizedAsyncChannel

All Implemented Interfaces:

AsyncChannel, AsyncChannelListener, Channel, Disposable, InputAsyncChannel, OutputChannel, Service

public class SynchornizedAsyncChannel
extends FilterAsyncChannel

Used to synchronize concurrent access to an ASynchChannel. Uses a Sync object for write operations. All other operations such as stop(long) and stop(long) just do a normal java synchronization against the SynchornizedSynchChannel object instance. It is assumed that the Async message delivery is not concurrent and therefore does not require synchronization.

Field Summary

Fields inherited from class org.activeio.FilterAsyncChannel

channelListener, next

Fields inherited from interface org.activeio.Service

NO_WAIT_TIMEOUT, WAIT_FOREVER_TIMEOUT

Fields inherited from interface org.activeio.Service

NO_WAIT_TIMEOUT, WAIT_FOREVER_TIMEOUT

Constructor Summary

SynchornizedAsyncChannel(AsyncChannel next)

SynchornizedAsyncChannel(AsyncChannel next, Sync writeLock)

Method Summary

void	dispose() This method should not throw any exceptions.
void	flush() Some channels may buffer data which may be sent down if flush() is called.
Sync	getWriteLock()
Object	narrow(Class target) Since a Channel may be composed from a chain of other Channel obejcts, this method allows you to query the chain for the specified interface.
void	start() Starts the channel.
void	stop(long timeout) Stops the channel.
void	write(Packet packet) Sends a packet down the channel towards the media.

Methods inherited from class org.activeio.FilterAsyncChannel

getAsyncChannelListener, getNext, onPacket, onPacketError, setAsyncChannelListener, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SynchornizedAsyncChannel

public SynchornizedAsyncChannel(AsyncChannel next)

SynchornizedAsyncChannel

public SynchornizedAsyncChannel(AsyncChannel next,
                                Sync writeLock)

Method Detail

write

public void write(Packet packet)
           throws IOException

Description copied from interface: OutputChannel

Sends a packet down the channel towards the media.

Specified by:

write in interface OutputChannel

Overrides:

write in class FilterAsyncChannel

Throws:

IOException

flush

public void flush()
           throws IOException

Description copied from interface: OutputChannel

Some channels may buffer data which may be sent down if flush() is called.

Specified by:

flush in interface OutputChannel

Overrides:

flush in class FilterAsyncChannel

Throws:

IOException

dispose

public void dispose()

Description copied from interface: Disposable

This method should not throw any exceptions. Cleaning up a Disposable object should be easy of an end user therefore do not make him have to handle an Exception.

Specified by:

dispose in interface Disposable

Overrides:

dispose in class FilterAsyncChannel

See Also:

Disposable.dispose()

narrow

public Object narrow(Class target)

Description copied from interface: Channel

Since a Channel may be composed from a chain of other Channel obejcts, this method allows you to query the chain for the specified interface. The first Channel in the chain the implments the requested interface will be return an implementing object. If no Channel in the chain implements the requested class, then null is returned.

Specified by:

narrow in interface Channel

Overrides:

narrow in class FilterAsyncChannel

start

public void start()
           throws IOException

Description copied from interface: Service

Starts the channel. Once started, the channel is in the running state.

Specified by:

start in interface Service

Overrides:

start in class FilterAsyncChannel

Throws:

IOException - if the next channel has not been set.

See Also:

Service.start()

stop

public void stop(long timeout)
          throws IOException

Description copied from interface: Service

Stops the channel. Once stopped, the channel is in the stopped state.

Specified by:

stop in interface Service

Overrides:

stop in class FilterAsyncChannel

Parameters:

timeout - The amount of time the channel is allowed to take to gracefully stop. If the timeout is exceeded, the channel should do a forcefull stop.

Throws:

IOException

See Also:

Service.stop(long)

getWriteLock

public Sync getWriteLock()