Class AbstractMessageSink

java.lang.Object

org.eclipse.jetty.websocket.core.messages.AbstractMessageSink

All Implemented Interfaces:

MessageSink

Direct Known Subclasses:

ByteArrayMessageSink, ByteBufferMessageSink, DispatchedMessageSink, PartialByteArrayMessageSink, PartialByteBufferMessageSink, PartialStringMessageSink, StringMessageSink

public abstract class AbstractMessageSink
extends Object
implements MessageSink

Abstract implementation of MessageSink.

Management of demand for WebSocket frames may either be entirely managed by the MessageSink implementation (autoDemand==true); or it may be managed collaboratively between the application and the MessageSink implementation (autoDemand==true).

MessageSink implementations must handle the demand for WebSocket frames in this way:

• If autoDemand==false, the MessageSink manages the demand until the conditions to invoke the application function are met; when the MessageSink invokes the application function, then the application is responsible to demand for more WebSocket frames.
• If autoDemand==true, only the MessageSink manages the demand for WebSocket frames. If the MessageSink invokes the application function, the MessageSink must demand for WebSocket frames after the invocation of the application function returns successfully.

Method autoDemand() helps to manage the demand after the invocation of the application function returns successfully.

Constructor Summary

Constructors

Constructor	Description
AbstractMessageSink(CoreSession session, MethodHandle methodHandle, boolean autoDemand)	Creates a new MessageSink.

Method Summary

Modifier and Type	Method	Description
protected void	autoDemand()	If isAutoDemand() then demands for one more WebSocket frame via CoreSession.demand(); otherwise it is a no-operation, because the demand is explicitly managed by the application function.
CoreSession	getCoreSession()	Get the WebSocket session.
MethodHandle	getMethodHandle()	Get the application function.
boolean	isAutoDemand()

Methods inherited from class Object

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

Methods inherited from interface MessageSink

accept, fail

Constructor Details

AbstractMessageSink

public AbstractMessageSink(CoreSession session,
 MethodHandle methodHandle,
 boolean autoDemand)

Creates a new MessageSink.

Parameters:

session - the WebSocket session

methodHandle - the application function to invoke

autoDemand - whether this MessageSink manages demand automatically as explained in AbstractMessageSink

Method Details

getCoreSession

public CoreSession getCoreSession()

Get the WebSocket session.

Returns:

the WebSocket session

getMethodHandle

public MethodHandle getMethodHandle()

Get the application function.

Returns:

the application function

isAutoDemand

public boolean isAutoDemand()

Returns:

whether this MessageSink automatically demands for more WebSocket frames after the invocation of the application function has returned.

autoDemand

protected void autoDemand()

If isAutoDemand() then demands for one more WebSocket frame via CoreSession.demand(); otherwise it is a no-operation, because the demand is explicitly managed by the application function.