/**
* Unsubscribe the provided Subscription
*
* @param subscription
*/
public void unsubscribe(DynSubscription subscription) {
if (subscription.isConnected()) {
subscription.publication.removeSubscription(subscription);
subscription.publication.publisher.subscriptionDisconnected(name, subscription);
subscription.set(null);
}
subscriptions.remove(subscription);
}
/**
* Recall and remove the provided Publication from the System
*
* @param publication
*/
public void recall(DynPublication publication) {
// Debugger.debug(getClass(), "try to recall publication. has Subscriptions: " +
// publication.hasSubscriptions());
while (publication.hasSubscriptions()) {
// Debugger.debug(getClass(), "Disconnect subscription...");
DynSubscription subscription = publication.removeNextSubscription();
subscription.subscriber.publicationDisonnected(name, subscription);
subscription.set(null);
}
publications.remove(publication);
}
/**
* Unsubscribe all subscriptions subscribed by the provided subscriber
*
* @param subscriber
*/
public void unsubscribe(DynSubscriber subscriber) {
Iterator<DynSubscription> i = subscriptions.iterator();
while (i.hasNext()) {
DynSubscription subscription = i.next();
if (subscription.subscriber == subscriber) {
subscription.publication.removeSubscription(subscription);
subscription.publication.publisher.subscriptionDisconnected(name, subscription);
subscription.set(null);
i.remove();
}
}
}
/**
* Recall and remove the Publication with the provided identifier from the System
*
* @param publicationname
*/
public void recall(String publicationname) {
Iterator<DynPublication> i = publications.iterator();
while (i.hasNext()) {
DynPublication publication = i.next();
if (publication.identifier.equals(publicationname)) {
while (publication.hasSubscriptions()) {
DynSubscription subscription = publication.removeNextSubscription();
subscription.subscriber.publicationDisonnected(name, subscription);
subscription.set(null);
}
i.remove();
}
}
}
/**
* Subscribe and try to connect the provided Subscription.
*
* <p>Careful: Calling this method does NOT guarantee to have a valid connection to a publication.
* It only means, that the request to subscribe was registered and it tries to connect if there is
* a matching publication.
*
* <p>VERY Careful: If a valid connection can be established this method calls directly the
* Subscribers publicationConnected() method and returns once that method returns.
*
* @param subscription
* @return true if a successful connection to a publication could be established
*/
public boolean subscribe(DynSubscription subscription) {
if (!subscriptions.contains(subscription)) {
subscriptions.add(subscription);
if (!subscription.isConnected()) {
Iterator<DynPublication> i = publications.iterator();
while (i.hasNext()) {
DynPublication publication = i.next();
if (subscription.equalsIdentifier(publication)) {
subscription.set(publication);
publication.addSubscription(subscription);
subscription.subscriber.publicationConnected(name, subscription);
publication.publisher.subscriptionConnected(name, subscription);
return true;
}
}
}
}
return false;
}
/**
* Publish the provided Publication
*
* <p>Careful: Calling this method does NOT guarantee to have a valid connection to a
* subscription. It only means, that the publication is registered and it tries to connect if
* there is a matching subscription.
*
* <p>VERY Careful: If a valid connection can be established this method calls directly the
* Publishers subscriptionConnected() method and returns once that method returns.
*
* @param publication
* @throws DynException if the Publications identifier has already been taken
*/
public void publish(DynPublication publication) throws DynException {
// Debugger.debug(getClass(), "try to publish publication: " + publication.getIdentifier());
// First check if this pointers name has been already taken
Iterator<DynPublication> p = publications.iterator();
while (p.hasNext()) {
if (p.next().identifier.equals(publication.identifier))
throw new DynException("Publication name already taken: " + publication.identifier);
}
publications.add(publication);
Iterator<DynSubscription> i = subscriptions.iterator();
while (i.hasNext()) {
DynSubscription subscription = i.next();
if (!subscription.isConnected() && subscription.equalsIdentifier(publication)) {
publication.addSubscription(subscription);
subscription.set(publication);
publication.publisher.subscriptionConnected(name, subscription);
subscription.subscriber.publicationConnected(name, subscription);
}
}
}
