private static AsyncEventQueue createAsyncEventQueue(
AsyncEventQueueDescription aeqd, Cache cache) {
// configure the factory
AsyncEventQueueFactory f = cache.createAsyncEventQueueFactory();
log.info("Configuring async event queue factory");
aeqd.configure(f);
log.info("Configured async event queue factory " + f);
// create the async event queue
log.info("Creating and starting async event queue " + aeqd.getName());
AsyncEventQueue queue = f.create(aeqd.getName(), aeqd.getAsyncEventListenerInstance());
log.info("Created and started async event queue: " + asyncEventQueueToString(queue));
return queue;
}
/**
* Creates and starts an async event queue in the current cache. The queue is configured using the
* {@link AsyncEventQueueDescription} corresponding to the given configuration from {@link
* AsyncEventQueuePrms#names}. The id for the queue is the same as the queue configuration name.
*
* <p>This method is thread-safe. The async event queues for a given logical queue configuration
* will only be created once.
*
* @throws HydraRuntimeException if an attempt is made to reconfigure an existing async event
* queue.
*/
public static synchronized AsyncEventQueue createAndStartAsyncEventQueue(
String asyncEventQueueConfig) {
AsyncEventQueue queue = getAsyncEventQueue(asyncEventQueueConfig);
if (queue == null) {
// get the cache
Cache cache = CacheHelper.getCache();
if (cache == null) {
String s = "Cache has not been created yet";
throw new HydraRuntimeException(s);
}
// look up the async event queue configuration
AsyncEventQueueDescription aeqd = getAsyncEventQueueDescription(asyncEventQueueConfig);
// create the disk store
DiskStoreHelper.createDiskStore(aeqd.getDiskStoreDescription().getName());
// create the async event queue
queue = createAsyncEventQueue(aeqd, cache);
}
return queue;
}
/** Returns the given async event queue as a string. */
public static String asyncEventQueueToString(AsyncEventQueue aeq) {
return AsyncEventQueueDescription.asyncEventQueueToString(aeq);
}