org.jivesoftware.wildfire.net
Class VirtualConnection

java.lang.Object
  org.jivesoftware.wildfire.net.VirtualConnection

All Implemented Interfaces:

Connection

Direct Known Subclasses:

ClientSessionConnection, HttpSession.HttpVirtualConnection

public abstract class VirtualConnection
extends Object
implements Connection

Abstract implementation of the Connection interface that models abstract connections. Abstract connections are connections that don't have a physical connection counterpart. Instead they can be seen as conceptual or just 'abstract' connections.

Default values and common behavior of virtual connections are modeled in this class. Subclasses should just need to specify how packets are delivered and what means closing the connection.

Author:

Gaston Dombiak

Nested Class Summary

Nested classes/interfaces inherited from interface org.jivesoftware.wildfire.Connection

Connection.CompressionPolicy, Connection.TLSPolicy

Field Summary

protected Session

session

Constructor Summary

VirtualConnection()

Method Summary

void	close() Closes the session, the virtual connection and notifies listeners that the connection has been closed.
abstract void	closeVirtualConnection() Closes the virtual connection.
Connection.CompressionPolicy	getCompressionPolicy() Returns whether compression is optional or is disabled.
String	getLanguage() Returns the language code that should be used for this connection (e.g.
int	getMajorXMPPVersion() Returns the major version of XMPP being used by this connection (major_version.minor_version.
int	getMinorXMPPVersion() Returns the minor version of XMPP being used by this connection (major_version.minor_version.
PacketDeliverer	getPacketDeliverer() Returns the packet deliverer to use when delivering a packet over the socket fails.
Connection.TLSPolicy	getTlsPolicy() Returns whether TLS is mandatory, optional or is disabled.
void	init(Session session) Initializes the connection with it's owning session.
boolean	isClosed() Returns true if the connection/session is closed.
boolean	isCompressed() Returns true if the connection is using compression.
boolean	isFlashClient() Returns true if the connected client is a flash client.
boolean	isSecure() Returns true if this connection is secure.
void	registerCloseListener(ConnectionCloseListener listener, Object handbackMessage) Registers a listener for close event notification.
void	removeCloseListener(ConnectionCloseListener listener) Removes a registered close event listener.
void	setCompressionPolicy(Connection.CompressionPolicy compressionPolicy) Sets whether compression is enabled or is disabled.
void	setFlashClient(boolean flashClient) Sets whether the connected client is a flash client.
void	setLanaguage(String language) Sets the language code that should be used for this connection (e.g.
void	setTlsPolicy(Connection.TLSPolicy tlsPolicy) Sets whether TLS is mandatory, optional or is disabled.
void	setXMPPVersion(int majorVersion, int minorVersion) Sets the XMPP version information.
void	startCompression() Start using compression for this connection.
void	startTLS(boolean clientMode, String remoteServer) Secures the plain connection by negotiating TLS with the client.
boolean	validate() Verifies that the connection is still live.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jivesoftware.wildfire.Connection

deliver, deliverRawText, getInetAddress, systemShutdown

Field Detail

session

protected Session session

Constructor Detail

VirtualConnection

public VirtualConnection()

Method Detail

getLanguage

public String getLanguage()

Description copied from interface: Connection

Returns the language code that should be used for this connection (e.g. "en").

Specified by:

getLanguage in interface Connection

Returns:

the language code for the connection.

getMajorXMPPVersion

public int getMajorXMPPVersion()

Description copied from interface: Connection

Returns the major version of XMPP being used by this connection (major_version.minor_version. In most cases, the version should be "1.0". However, older clients using the "Jabber" protocol do not set a version. In that case, the version is "0.0".

Specified by:

getMajorXMPPVersion in interface Connection

Returns:

the major XMPP version being used by this connection.

getMinorXMPPVersion

public int getMinorXMPPVersion()

Description copied from interface: Connection

Returns the minor version of XMPP being used by this connection (major_version.minor_version. In most cases, the version should be "1.0". However, older clients using the "Jabber" protocol do not set a version. In that case, the version is "0.0".

Specified by:

getMinorXMPPVersion in interface Connection

Returns:

the minor XMPP version being used by this connection.

isClosed

public boolean isClosed()

Description copied from interface: Connection

Returns true if the connection/session is closed.

Specified by:

isClosed in interface Connection

Returns:

true if the connection is closed.

getCompressionPolicy

public Connection.CompressionPolicy getCompressionPolicy()

Description copied from interface: Connection

Returns whether compression is optional or is disabled.

Specified by:

getCompressionPolicy in interface Connection

Returns:

whether compression is optional or is disabled.

getTlsPolicy

public Connection.TLSPolicy getTlsPolicy()

Description copied from interface: Connection

Returns whether TLS is mandatory, optional or is disabled. When TLS is mandatory clients are required to secure their connections or otherwise their connections will be closed. On the other hand, when TLS is disabled clients are not allowed to secure their connections using TLS. Their connections will be closed if they try to secure the connection. in this last case.

Specified by:

getTlsPolicy in interface Connection

Returns:

whether TLS is mandatory, optional or is disabled.

isCompressed

public boolean isCompressed()

Description copied from interface: Connection

Returns true if the connection is using compression.

Specified by:

isCompressed in interface Connection

Returns:

true if the connection is using compression.

isFlashClient

public boolean isFlashClient()

Description copied from interface: Connection

Returns true if the connected client is a flash client. Flash clients need to receive a special character (i.e. \0) at the end of each xml packet. Flash clients may send the character \0 in incoming packets and may start a connection using another openning tag such as: "flash:client".

Specified by:

isFlashClient in interface Connection

Returns:

true if the connected client is a flash client.

setFlashClient

public void setFlashClient(boolean flashClient)

Description copied from interface: Connection

Sets whether the connected client is a flash client. Flash clients need to receive a special character (i.e. \0) at the end of each xml packet. Flash clients may send the character \0 in incoming packets and may start a connection using another openning tag such as: "flash:client".

Specified by:

setFlashClient in interface Connection

Parameters:

flashClient - true if the if the connection is a flash client.

setXMPPVersion

public void setXMPPVersion(int majorVersion,
                           int minorVersion)

Description copied from interface: Connection

Sets the XMPP version information. In most cases, the version should be "1.0". However, older clients using the "Jabber" protocol do not set a version. In that case, the version is "0.0".

Specified by:

setXMPPVersion in interface Connection

Parameters:

majorVersion - the major version.

minorVersion - the minor version.

setLanaguage

public void setLanaguage(String language)

Description copied from interface: Connection

Sets the language code that should be used for this connection (e.g. "en").

Specified by:

setLanaguage in interface Connection

Parameters:

language - the language code.

setCompressionPolicy

public void setCompressionPolicy(Connection.CompressionPolicy compressionPolicy)

Description copied from interface: Connection

Sets whether compression is enabled or is disabled.

Specified by:

setCompressionPolicy in interface Connection

Parameters:

compressionPolicy - whether Compression is enabled or is disabled.

setTlsPolicy

public void setTlsPolicy(Connection.TLSPolicy tlsPolicy)

Description copied from interface: Connection

Sets whether TLS is mandatory, optional or is disabled. When TLS is mandatory clients are required to secure their connections or otherwise their connections will be closed. On the other hand, when TLS is disabled clients are not allowed to secure their connections using TLS. Their connections will be closed if they try to secure the connection. in this last case.

Specified by:

setTlsPolicy in interface Connection

Parameters:

tlsPolicy - whether TLS is mandatory, optional or is disabled.

getPacketDeliverer

public PacketDeliverer getPacketDeliverer()

Description copied from interface: Connection

Returns the packet deliverer to use when delivering a packet over the socket fails. The packet deliverer will retry to send the packet using some other connection, will store the packet offline for later retrieval or will just drop it.

Specified by:

getPacketDeliverer in interface Connection

Returns:

the packet deliverer to use when delivering a packet over the socket fails.

startTLS

public void startTLS(boolean clientMode,
                     String remoteServer)
              throws Exception

Description copied from interface: Connection

Secures the plain connection by negotiating TLS with the client. When connecting to a remote server then clientMode will be true and remoteServer is the server name of the remote server. Otherwise clientMode will be false and remoteServer null.

Specified by:

startTLS in interface Connection

Parameters:

clientMode - boolean indicating if this entity is a client or a server.

remoteServer - server name of the remote server we are connecting to or null when not in client mode.

Throws:

Exception - if an error occured while securing the connection.

startCompression

public void startCompression()

Description copied from interface: Connection

Start using compression for this connection. Compression will only be available after TLS has been negotiated. This means that a connection can never be using compression before TLS. However, it is possible to use compression without TLS.

Specified by:

startCompression in interface Connection

isSecure

public boolean isSecure()

Description copied from interface: Connection

Returns true if this connection is secure.

Specified by:

isSecure in interface Connection

Returns:

true if the connection is secure (e.g. SSL/TLS)

validate

public boolean validate()

Description copied from interface: Connection

Verifies that the connection is still live. Typically this is done by sending a whitespace character between packets.

Specified by:

validate in interface Connection

Returns:

true if the socket remains valid, false otherwise.

init

public void init(Session session)

Description copied from interface: Connection

Initializes the connection with it's owning session. Allows the connection class to configure itself with session related information (e.g. stream ID).

Specified by:

init in interface Connection

Parameters:

session - the session that owns this connection

close

public void close()

Closes the session, the virtual connection and notifies listeners that the connection has been closed.

Specified by:

close in interface Connection

registerCloseListener

public void registerCloseListener(ConnectionCloseListener listener,
                                  Object handbackMessage)

Description copied from interface: Connection

Registers a listener for close event notification. Registrations after the Session is closed will be immediately notified before the registration call returns (within the context of the registration call). An optional handback object can be associated with the registration if the same listener is registered to listen for multiple connection closures.

Specified by:

registerCloseListener in interface Connection

Parameters:

listener - the listener to register for events.

handbackMessage - the object to send in the event notification.

removeCloseListener

public void removeCloseListener(ConnectionCloseListener listener)

Description copied from interface: Connection

Removes a registered close event listener. Registered listeners must be able to receive close events up until the time this method returns. (i.e. it is possible to call unregister, receive a close event registration, and then have the unregister call return.)

Specified by:

removeCloseListener in interface Connection

Parameters:

listener - the listener to deregister for close events.

closeVirtualConnection

public abstract void closeVirtualConnection()

Closes the virtual connection. Subsclasses should indicate what closing a virtual connection means. At this point the session has a CLOSED state.