IceStorm::Topic Interface Reference

Publishers publish information on a particular topic. More...

Defined in <IceStorm/IceStorm.ice>

interface Topic { ... }

Operations
void	destroy ()
	Destroy the topic. More...
idempotent LinkInfoSeq	getLinkInfoSeq ()
	Retrieve information on the current links. More...
idempotent string	getName ()
	Get the name of this topic. More...
idempotent Object *	getNonReplicatedPublisher ()
	Get a non-replicated proxy to a publisher object for this topic. More...
idempotent Object *	getPublisher ()
	Get a proxy to a publisher object for this topic. More...
Ice::IdentitySeq	getSubscribers ()
	Retrieve the list of subscribers for this topic. More...
void	link (Topic *linkTo, int cost) throws LinkExists
	Create a link to the given topic. More...
Object *	subscribeAndGetPublisher (QoS theQoS, Object *subscriber) throws AlreadySubscribed, InvalidSubscriber, BadQoS
	Subscribe with the given qos to this topic. More...
void	unlink (Topic *linkTo) throws NoSuchLink
	Destroy the link from this topic to the given topic linkTo. More...
idempotent void	unsubscribe (Object *subscriber)
	Unsubscribe the given subscriber. More...

Detailed Description

Publishers publish information on a particular topic.

A topic logically represents a type.

See also

TopicManager

Operation Documentation

destroy()

void destroy

(

)

Destroy the topic.

getLinkInfoSeq()

["nonmutating","cpp:const"]

idempotent LinkInfoSeq getLinkInfoSeq

(

)

Retrieve information on the current links.

Returns

A sequence of LinkInfo objects.

getName()

["nonmutating","cpp:const"]

idempotent string getName

(

)

Get the name of this topic.

Returns

The name of the topic.

See also

TopicManager::create

getNonReplicatedPublisher()

["nonmutating","cpp:const"]

idempotent Object* getNonReplicatedPublisher

(

)

Get a non-replicated proxy to a publisher object for this topic.

To publish data to a topic, the publisher calls getPublisher and then casts to the topic type. An unchecked cast must be used on this proxy.

Returns

A proxy to publish data on this topic.

getPublisher()

["nonmutating","cpp:const"]

idempotent Object* getPublisher

(

)

Get a proxy to a publisher object for this topic.

To publish data to a topic, the publisher calls getPublisher and then casts to the topic type. An unchecked cast must be used on this proxy. If a replicated IceStorm deployment is used this call may return a replicated proxy.

Returns

A proxy to publish data on this topic.

getSubscribers()

["nonmutating","cpp:const"]

Ice::IdentitySeq getSubscribers

(

)

Retrieve the list of subscribers for this topic.

Returns

The sequence of Ice identities for the subscriber objects.

link()

void link	(	Topic *	linkTo,
		int	cost
	)		throws LinkExists

Create a link to the given topic.

All events originating on this topic will also be sent to linkTo.

Parameters

linkTo	The topic to link to.
cost	The cost to the linked topic.

Exceptions

LinkExists

Raised if a link to the same topic already exists.

subscribeAndGetPublisher()

Object* subscribeAndGetPublisher	(	QoS	theQoS,
		Object *	subscriber
	)		throws AlreadySubscribed, InvalidSubscriber, BadQoS

Subscribe with the given qos to this topic.

A per-subscriber publisher object is returned.

Parameters

theQoS	The quality of service parameters for this subscription.
subscriber	The subscriber's proxy.

Returns

The per-subscriber publisher object.

Exceptions

AlreadySubscribed	Raised if the subscriber object is already subscribed.
NullSubscriber	Raised if the subscriber object is null.
BadQoS	Raised if the requested quality of service is unavailable or invalid.

See also

unsubscribe

unlink()

void unlink

(

Topic *

linkTo

)

throws NoSuchLink

Destroy the link from this topic to the given topic linkTo.

Parameters

linkTo

The topic to destroy the link to.

Exceptions

NoSuchLink

Raised if a link to the topic does not exist.

unsubscribe()

idempotent void unsubscribe

(

Object *

subscriber

)

Unsubscribe the given subscriber.

Parameters

subscriber

The proxy of an existing subscriber.

See also

subscribeAndGetPublisher

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The documentation for this interface was generated from the following file:

• IceStorm/IceStorm.ice