org.jacorb.events

Class ProxyPushConsumerImpl

public class ProxyPushConsumerImpl extends ProxyPushConsumerPOA

Implementation of COSEventChannelAdmin interface; ProxyPushConsumer. This defines connect_push_supplier(), disconnect_push_consumer() and the all important push() method that the Supplier can call to actuall deliver a message. 2002/23/08 JFC OMG EventService Specification 1.1 page 2-7 states: "Registration is a two step process. An event-generating application first obtains a proxy consumer from a channel, then 'connects' to the proxy consumer by providing it with a supplier. ... The reason for the two step registration process..." Modifications to support the above have been made as well as to support section 2.1.5 "Disconnection Behavior" on page 2-4.

Version: $Id: ProxyPushConsumerImpl.java,v 1.8 2004/05/06 12:39:58 nicolas Exp $

Author: Jeff Carlson, Joerg v. Frantzius, Rainer Lischetzki, Gerald Brose

Constructor Summary
protected ProxyPushConsumerImpl(EventChannelImpl ec, ORB orb, POA poa)
Konstruktor - wird von EventChannel aufgerufen
Method Summary
voidconnect_push_supplier(PushSupplier pushSupplier)
fuers ProxyPushConsumer Interface: As stated by the EventService specification 1.1 section 2.3.4: "If a ProxyPushConsumer is already connected to a PushSupplier, then the AlreadyConnected exception is raised." and "If a non-nil reference is passed to connect_push_supplier..." implying that a null reference is acceptable.
voiddisconnect_push_consumer()
fuers PushConsumer Interface: See EventService v 1.1 specification section 2.1.1.
voidpush(Any event)
Supplier sends data to the consumer (this object) using this call.
POA_default_POA()
Override this method from the Servant baseclass.

Constructor Detail

ProxyPushConsumerImpl

protected ProxyPushConsumerImpl(EventChannelImpl ec, ORB orb, POA poa)
Konstruktor - wird von EventChannel aufgerufen

Method Detail

connect_push_supplier

public void connect_push_supplier(PushSupplier pushSupplier)
fuers ProxyPushConsumer Interface: As stated by the EventService specification 1.1 section 2.3.4: "If a ProxyPushConsumer is already connected to a PushSupplier, then the AlreadyConnected exception is raised." and "If a non-nil reference is passed to connect_push_supplier..." implying that a null reference is acceptable.

disconnect_push_consumer

public void disconnect_push_consumer()
fuers PushConsumer Interface: See EventService v 1.1 specification section 2.1.1. 'disconnect_push_consumer terminates the event communication; it releases resources used at the consumer to support event communication. Calling this causes the implementation to call disconnect_push_supplier operation on the corresponding PushSupplier interface (if that iterface is known).' See EventService v 1.1 specification section 2.1.5. This method should adhere to the spec as it a) causes a call to the corresponding disconnect on the connected supplier, b) 'If a consumer or supplier has received a disconnect call and subsequently receives another disconnect call, it shall raise a CORBA::OBJECT_NOT_EXIST exception.

push

public void push(Any event)
Supplier sends data to the consumer (this object) using this call.

_default_POA

public POA _default_POA()
Override this method from the Servant baseclass. Fintan Bolton in his book "Pure CORBA" suggests that you override this method to avoid the risk that a servant object (like this one) could be activated by the wrong POA object.