@async方法之间的同步

Question

I have to sychronize between asynchronous methods.

I have got three methods say

method1, method2, method3 with the following defenitions

void method1() {
    method2();
    //some code
    method3();
}

@Async
void method2() {
    //some code
}


@Async
void method3() {
    //some code
}

My requirement is that I want to make sure that method3 is executed after method2. After doing some search I have come to a conclusion to use a new SimpleThreadPoolTaskExecutor with pool size configured to 1 and use it for the methods method2 and method3. I would like to know whether there is any better option than this. I am new to Spring Task scheduling. And sorry for not providing a demoable example.

Answer 1

void method1() {
    Semaphore semaphore = new Semaphore(1);
    semaphore.aquire();
    method2(semaphore);
    method3(semaphore);
}


@Async
void method2(Semaphore semaphore) {
   //do some stuff
   semaphore.release();
}

@Async
void method3(Semaphore semaphore) {
    semaphore.aquire();

    // do some stuff
}