siena.comm
Class GenericSenderFactory

java.lang.Object
  siena.comm.GenericSenderFactory

All Implemented Interfaces:

PacketSenderFactory

public class GenericSenderFactory
extends java.lang.Object
implements PacketSenderFactory

generic packet sender factory. This factory recognizes all the receiver's schemas defined by the core Siena implementation ("tcp" for TCPPacketReceiver, "udp" for UDPPacketReceiver, "ka" for KAPacketReceiver, and "ssl" for SSLPacketReceiver).

In addition to the native schemas, this factory allows new schemas to be registered with their specific factory (see registerFactory(String,PacketSenderFactory).

Constructor Summary

GenericSenderFactory()

Method Summary

PacketSender	createPacketSender(java.lang.String handler) returns a new packet sender based on the external address (i.e., handler or url) of the intended receiver.
static void	registerFactory(java.lang.String schema, PacketSenderFactory f) extends this factory by registering new packet sender factories.
static void	removeFactory(java.lang.String schema) removes a previously registered factory.

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericSenderFactory

public GenericSenderFactory()

Method Detail

createPacketSender

public PacketSender createPacketSender(java.lang.String handler)
                                throws InvalidSenderException

returns a new packet sender based on the external address (i.e., handler or url) of the intended receiver.

This method processes the input handler as follows:

1. it extracts the schema identifier from the complete handler
2. it attempts to match the schema with one of Siena's "native" schemas, and to create a corresponding sender
3. if the given schema does not match any native schema, then this method tries to find a registered factory for that schema
4. if a matching registered schema is found, the remaining part of the handler (without the ":" character) is passed to the associated factory to create a sender object;

Specified by:

createPacketSender in interface PacketSenderFactory

Parameters:

handler - receiver's address

Throws:

InvalidSenderException

registerFactory

public static void registerFactory(java.lang.String schema,
                                   PacketSenderFactory f)

extends this factory by registering new packet sender factories. A GenericSenderFactory can be extended by registering new PacketSenderFactory implementations. Notice that GenericSenderFactory will delegate the instantiation of a specific PacketSender to a registered factory by passing it the handler string. See createPacketSender(String) for more details on how GenericSenderFactory processes handlers.

Notice that the factory register is static, therefore registration and de-registration will affect every instance of this class.

Parameters:

schema - schema name

f - schema-specific factory

removeFactory

public static void removeFactory(java.lang.String schema)

removes a previously registered factory.

See Also:

registerFactory(String,PacketSenderFactory)