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javajakarta-eeasynchronousjboss
michaelbahr
michaelbahr

Reputation: 4973

Java - Sequential async executions

I have an async task that performs database operations. This may take many minutes.

public void doSomeStuff() {
   // 10 minutes of database magic
}

Due to possible concurrency problems on the database side, there must be only one asynchronous execution of this method at the same time (like a singleton). Furthermore if the method is already running, the next call shall not be discarded, but rememberered and executed when the previous call finishes. Just like a queue.

I've researched the @Asynchronous and @ConcurrencyManagement(...) annotations, however they don't seem to provide the required control.

How can I achieve this in JavaEE 7 with the JBoss EAP 6 (+JSF)?

Upvotes: 0

Views: 187

Answers (1)

Marco Stramezzi
Marco Stramezzi

Reputation: 2271

You could use a @Stateless bean with an @Asynchronous method.

Then you could set the thread pool used by the bean with the annotation @Pool(<pool name>). If you limit the pool size to 1, you have what you need.

Upvotes: 1

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