是否可以在Java RMI的同一线程中运行对两个不同方法的远程调用？

Question

Suppose that Remote class RemoteServer has two remote methods method1 and method2 .

Is it possible to run the remote calls to these two methods in the same thread of the server in Java RMI?

It is known that method1 will be called first.

---

I have read "Thread Usage in Remote Method Invocations" (below) and have no ideas.

A method dispatched by the RMI runtime to a remote object implementation may or may not execute in a separate thread. The RMI runtime makes no guarantees with respect to mapping remote object invocations to threads.

Answer 1

Though your question indicates that there's a good chance you can find better program design, if you really need such functionality, you can implement it by means of ThreadPoolExecutor with a single thread. Just wrap your methods method1() and method2() into two different Callable 's and submit them to your single-threaded pool.

class Method1Task implements Callable<Void> {
    public Void call() throws Exception {
        // method 1 body here
        return null;
    }
}

class Method2Task implements Callable<Void> {
    public Void call() throws Exception {
        // method 2 body here
        return null;
    }
}

...

// Create a single-thread pool and use it to submit tasks
private final ExecutorService executor = Executors.newFixedThreadPool(1);

void method1() {
    executor.submit(new Method1Task());
}

void method2() {
    executor.submit(new Method2Task());
}

If you need to wait for method completions, use Future s that are returned by submit() s. If you need to return values from the methods, change Void for appropriate data types.

In Java 8 it's simpler, you don't need the Callable s:

executor.submit(() -> {
    // call the method you need here
});