Work around Hibernate's errors in multithreaded applications

问题

Because of all the problems we can meet when trying to use Hibernate in a multithreaded application (1st clue, 2nd clue, 3rd clue, etc.), I was thinking of another solution: implementing the logical part within a classic Controller, and simply call it from my thread using URL.openConnection().

In other words, instead of doing something like this:

MyThread.java

public class MyThread implements Runnable {

    @Override
    public void run() {
        // do some great stuff with Hibernate
    }

}

Anywhere.java

new Thread(new MyThread()).start();

I would like to try something like that:

MyController.java

@Controller
public class MyController {

    @RequestMapping(value = "myUrl", method = RequestMethod.GET)
    public void myMethod() {
        // do some great stuff with Hibernate
    }

}

MyThread.java

public class MyThread implements Runnable {

    @Override
    public void run() {
        // simple call the above mapped url
    }

}

Anywhere.java

new Thread(new MyThread()).start();

What do you think about it? Good or bad? I haven't tried yet, but I think such a solution will prevent the common errors we can meet using Hibernate in multithreading, because the server will execute the logical part as if someone were requesting the fake page.

PS: I know there are some solutions to use Hibernate in multithreaded applications, but each time I try one, another appears, and that until the I'm-fed-up-with-it point of no return.

PS2: I'm aware that such a solution need to be secured (e.g. UID as a token).

回答1:

I don't really see what problem you're trying to solve here. Hibernate is almost always used in a multi-threaded environment. In webapps, for example, concurrent requests are handled by multiple concurrent threads, and each thread uses its own Hibernate session. And that doesn't cause any problem.

You will have problem if you share the same session among threads, or if you share a given entity among threads.

If you start your own thread, and this thread uses its own session and entities, I don't see why you would have any problem.

来源：https://stackoverflow.com/questions/10616207/work-around-hibernates-errors-in-multithreaded-applications

标签

java

multithreading

hibernate

spring-mvc