private List<QueryQueue> getOrCreateQueues(
Session session, Executor executor, List<QueryQueueDefinition> definitions) {
ImmutableList.Builder<QueryQueue> queues = ImmutableList.builder();
for (QueryQueueDefinition definition : definitions) {
String expandedName = definition.getExpandedTemplate(session);
QueueKey key = new QueueKey(definition, expandedName);
if (!queryQueues.containsKey(key)) {
QueryQueue queue =
new QueryQueue(executor, definition.getMaxQueued(), definition.getMaxConcurrent());
if (queryQueues.putIfAbsent(key, queue) == null) {
// Export the mbean, after checking for races
String objectName =
ObjectNames.builder(QueryQueue.class, definition.getTemplate())
.withProperty("expansion", expandedName)
.build();
mbeanExporter.export(objectName, queue);
}
}
queues.add(queryQueues.get(key));
}
return queues.build();
}
