org.jacorb.events

Class ProxyPushConsumerImpl

java.lang.Object

org.omg.PortableServer.Servant

org.omg.CosEventChannelAdmin.ProxyPushConsumerPOA

org.jacorb.events.ProxyPushConsumerImpl

All Implemented Interfaces:

InvokeHandler, ProxyPushConsumerOperations, PushConsumerOperations

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.

Author:

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

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
POA	_default_POA() Override this method from the Servant baseclass.
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.
void	disconnect_push_consumer() fuers PushConsumer Interface: See EventService v 1.1 specification section 2.1.1.
void	push(Any event) Supplier sends data to the consumer (this object) using this call.

Methods inherited from class org.omg.CosEventChannelAdmin.ProxyPushConsumerPOA

_all_interfaces, _invoke, _this, _this

Methods inherited from class org.omg.PortableServer.Servant

_get_delegate, _get_interface_def, _is_a, _non_existent, _object_id, _orb, _poa, _set_delegate, _this_object, _this_object

Methods inherited from class java.lang.Object

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

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)
                           throws AlreadyConnected

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.

Throws:

AlreadyConnected

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)
          throws Disconnected

Supplier sends data to the consumer (this object) using this call.

Throws:

Disconnected

_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.

Overrides:

_default_POA in class Servant