org.omg.CosNotifyChannelAdmin

Interface StructuredProxyPushSupplierOperations

public interface StructuredProxyPushSupplierOperations extends ProxySupplierOperations, StructuredPushSupplierOperations

The StructuredProxyPushSupplier interface supports connections to the channel by consumers who will receive events from the channel as Structured Events. Through inheritance of the ProxySupplier interface, the StructuredProxyPushSupplier interface supports administration of various QoS properties, administration of a list of associated filter objects, and a readonly attribute containing the reference of the ConsumerAdmin object which created it. In addition, this inheritance implies that a StructuredProxyPushSupplier instance supports an operation which will return the list of event types which the proxy supplier will potentially by supplying, and an operation which can return information about the instances ability to accept a per-event QoS request. The StructuredProxyPushSupplier interface also inherits from the StructuredPushSupplier interface defined in the CosNotifyComm module. This interface supports the operation which can be invoked to close down the connection from the consumer to the StructuredProxyPushSupplier. In addition, since the StructuredPushSupplier interface inherits from the NotifySubscribe interface, a StructuredProxyPushSupplier can be notified whenever the list of event types which its associated consumer is interested in receiving changes. This notification occurs via the callback mechanism described in section 2.3. Lastly, the StructuredProxyPushSupplier interface defines the operation which can be invoked by a push consumer to establish the connection over which the push consumer will receive events from the channel. The StructuredProxyPushSupplier interface also defines a pair of operations which can suspend and resume the connection between a StructuredProxyPushSupplier instance and its associated StructuredPushConsumer. During the time such a connection is suspended, the StructuredProxyPushSupplier will accumulate events destined for the consumer but not transmit them until the connection is resumed.
Method Summary
voidconnect_structured_push_consumer(StructuredPushConsumer push_consumer)
The connect_structured_push_consumer operation accepts as an input parameter the reference to an object supporting the StructuredPushConsumer interface defined within the CosNotifyComm module.
voidresume_connection()
The resume_connection operation causes the target object supporting the StructuredProxyPushSupplier interface to resume sending events to the StructuredPushConsumer instance connected to it.
voidsuspend_connection()
The suspend_connection operation causes the target object supporting the StructuredProxyPushSupplier interface to stop sending events to the StructuredPushConsumer instance connected to it.

Method Detail

connect_structured_push_consumer

public void connect_structured_push_consumer(StructuredPushConsumer push_consumer)
The connect_structured_push_consumer operation accepts as an input parameter the reference to an object supporting the StructuredPushConsumer interface defined within the CosNotifyComm module. This reference is that of a consumer which will receive events from the channel with which the target object is associated in the form of Structured Events. This operation is thus invoked in order to establish a connection between a push-style consumer of events in the form of Structured Events, and the notification channel. Once established, the StructuredProxyPushSupplier will proceed to send events destined for the consumer to it by invoking its push_structured_event operation. If the target object of this operation is already connected to a push consumer object, the AlreadyConnected exception will be raised. An implementation of the StructuredProxyPushSupplier interface may impose additional requirements on the interface supported by a push consumer (e.g., it may be designed to invoke some operation other than push_structured_event in order to transmit events). If the push consumer being connected does not meet those requirements, this operation raises the TypeError exception.

resume_connection

public void resume_connection()
The resume_connection operation causes the target object supporting the StructuredProxyPushSupplier interface to resume sending events to the StructuredPushConsumer instance connected to it. This operation takes no input parameters and returns no values. If the connection has not been previously suspended using this operation by invoking suspend_connection (described above), the ConnectionAlreadyActive exception is raised. If no StructuredPushConsumer has been connected to the target object when this operation is invoked, the NotConnected exception is raised. Otherwise, the StructuredProxyPushSupplier will resume forwarding events to the StructuredPushConsumer connected to it, including those which have been queued during the time the connection was suspended, and have not yet timed out.

suspend_connection

public void suspend_connection()
The suspend_connection operation causes the target object supporting the StructuredProxyPushSupplier interface to stop sending events to the StructuredPushConsumer instance connected to it. This operation takes no input parameters and returns no values. If the connection has been previously suspended using this operation and not resumed by invoking resume_connection (described below), the ConnectionAlreadyInactive exception is raised. If no StructuredPushConsumer has been connected to the target object when this operation is invoked, the NotConnected exception is raised. Otherwise, the StructuredProxyPushSupplier will not forward events to the StructuredPushConsumer connected to it until resume_connection is subsequently invoked. During this time, the StructuredProxyPushSupplier will continue to queue events destined for the StructuredPushConsumer, although events that time out prior to resumption of the connection will be discarded. Upon resumption of the connection, all queued events will be forwarded to the StructuredPushConsumer.