org.cometd.bayeux.server
Interface BayeuxServer

All Superinterfaces:

Bayeux

public interface BayeuxServer
extends Bayeux

The server-side Bayeux interface.

An instance of the BayeuxServer interface is available to web applications via the ""org.cometd.bayeux"" attribute of the servlet context.

The BayeuxServer APIs give access to the ServerSessions via the getSession(String) method. It also allows new LocalSession to be created within the server using the newLocalSession(String) method.

ServerChannel instances may be accessed via the getChannel(String) method, but the server has no direct relationship with ClientSessionChannels or ClientSession.

If subscription semantics is required, then the newLocalSession(String) method should be used to create a LocalSession that can subscribe and publish like a client-side Bayeux session.

Version:

$Revision: 1483 $ $Date: 2009-03-04 14:56:47 +0100 (Wed, 04 Mar 2009) $

Nested Class Summary

static interface	BayeuxServer.BayeuxServerListener Common base interface for all server-side Bayeux listeners
static interface	BayeuxServer.ChannelListener Specialized listener for ServerChannel events.
static interface	BayeuxServer.Extension Extension API for BayeuxServer.
static interface	BayeuxServer.SessionListener Specialized listener for ServerSession events.
static interface	BayeuxServer.SubscriptionListener Specialized listener for ServerChannel subscription events.

Nested classes/interfaces inherited from interface org.cometd.bayeux.Bayeux

Bayeux.BayeuxListener

Field Summary

static String

ATTRIBUTE ServletContext attribute name used to obtain the Bayeux object

Method Summary

void	addExtension(BayeuxServer.Extension extension) Adds the given extension to this Bayeux object.
void	addListener(BayeuxServer.BayeuxServerListener listener) Adds a listener to this Bayeux object.
boolean	createIfAbsent(String channelId, ConfigurableServerChannel.Initializer... initializers) Creates a ServerChannel and initializes it atomically.
ServerChannel	getChannel(String channelId)
List<ServerChannel>	getChannels()
BayeuxContext	getContext()
Transport	getCurrentTransport()
SecurityPolicy	getSecurityPolicy()
ServerSession	getSession(String clientId)
List<ServerSession>	getSessions()
LocalSession	newLocalSession(String idHint) Creates a new LocalSession.
ServerMessage.Mutable	newMessage()
void	removeExtension(BayeuxServer.Extension extension) Removes the given extension from this Bayeux object
void	removeListener(BayeuxServer.BayeuxServerListener listener) Removes a listener from this Bayeux object.
void	setSecurityPolicy(SecurityPolicy securityPolicy)

Methods inherited from interface org.cometd.bayeux.Bayeux

getAllowedTransports, getKnownTransportNames, getOption, getOptionNames, getTransport, setOption

Field Detail

ATTRIBUTE

static final String ATTRIBUTE

ServletContext attribute name used to obtain the Bayeux object

See Also:

Constant Field Values

Method Detail

addExtension

void addExtension(BayeuxServer.Extension extension)

Adds the given extension to this Bayeux object.

Parameters:

extension - the extension to add

See Also:

removeExtension(Extension)

removeExtension

void removeExtension(BayeuxServer.Extension extension)

Removes the given extension from this Bayeux object

Parameters:

extension - the extension to remove

See Also:

addExtension(Extension)

addListener

void addListener(BayeuxServer.BayeuxServerListener listener)

Adds a listener to this Bayeux object.

Parameters:

listener - the listener to add

See Also:

removeListener(BayeuxServerListener)

removeListener

void removeListener(BayeuxServer.BayeuxServerListener listener)

Removes a listener from this Bayeux object.

Parameters:

listener - the listener to remove

See Also:

addListener(BayeuxServerListener)

getChannel

ServerChannel getChannel(String channelId)

Parameters:

channelId - the channel identifier

Returns:

a ServerChannel with the given channelId, or null if no such channel exists

See Also:

createIfAbsent(String, org.cometd.bayeux.server.ConfigurableServerChannel.Initializer...)

getChannels

List<ServerChannel> getChannels()

Returns:

the list of channels known to this BayeuxServer object

createIfAbsent

boolean createIfAbsent(String channelId,
                       ConfigurableServerChannel.Initializer... initializers)

Creates a ServerChannel and initializes it atomically.

This method can be used instead of adding a BayeuxServer.ChannelListener to atomically initialize a channel. The initializer will be called before any other thread can access the new channel instance.

The createIfAbsent method should be used when a channel needs to be intialized (e.g. by adding listeners) before any publish or subscribes can occur on the channel, or before any other thread may concurrently create the same channel.

Parameters:

channelId - the channel identifier

initializers - the initializers invoked to configure the channel

Returns:

true if the channel was initialized, false otherwise

getSession

ServerSession getSession(String clientId)

Parameters:

clientId - the ServerSession identifier

Returns:

the ServerSession with the given clientId or null if no such valid session exists.

getSessions

List<ServerSession> getSessions()

Returns:

the list of ServerSessions known to this BayeuxServer object

newLocalSession

LocalSession newLocalSession(String idHint)

Creates a new LocalSession.

A LocalSession is a server-side ClientSession that allows server-side code to have special clients (resident within the same JVM) that can be used to publish and subscribe like a client-side session would do.

Parameters:

idHint - a hint to be included in the unique clientId of the session.

Returns:

a new LocalSession

newMessage

ServerMessage.Mutable newMessage()

Returns:

a new or recycled mutable message instance.

getSecurityPolicy

SecurityPolicy getSecurityPolicy()

Returns:

the SecurityPolicy associated with this session

See Also:

setSecurityPolicy(SecurityPolicy)

setSecurityPolicy

void setSecurityPolicy(SecurityPolicy securityPolicy)

Parameters:

securityPolicy - the SecurityPolicy associated with this session

See Also:

getSecurityPolicy()

getCurrentTransport

Transport getCurrentTransport()

Returns:

the current transport instance of the current thread

getContext

BayeuxContext getContext()

Returns:

the current Context, is equivalent to ((ServerTransport)getCurrentTransport()).ServerTransport.getContext()