[OpenStack]OpenStack多線程session無法使用

我在用openstack4j進行與openstack的互連的時候，想用spring編寫成一個服務的api，從自己的服務器接口直接獲取openstack的信息。但是在編寫的時候，發現了一個問題。就是openstack4j創建的client只能用一次，再深入調查，發現只能在初始化client的線程用一次，其他線程會報如下錯誤：

org.openstack4j.api.exceptions.OS4JException: Unable to retrieve current session. Please verify thread has a current session available.

然後就百度了下問題，主要原因是4j裏的session是用的ThreadLocal類型，因此線程間不通用。簡書這位博主解釋的挺到位，那我這裏就不多做解釋了，直接貼鏈接：https://www.jianshu.com/p/fd9abf27ae71。

但是文章中沒給解決辦法，只說了問題的原理。隨後我在openstack4j的官網找到了解決辦法，就是用client的Token爲每個線程新生成client，但token是唯一的，那麼這個client其實也是同一個，鏈接如下：http://www.openstack4j.com/learn/threads/。

實現代碼如下：

v3的情況下：

// Grab the token from the client in the thread that did the authentication
Token token = os.getToken();

// Spawn off a thread giving it the access
myThreadExecutor.submit(new MyRunnableOrCallable(token));

// Example of the Runnable or other object invoked in a new thread
public class MyRunnable implements Runnable {
     private OSClientV3 clientV3;

     public MyRunnable(Access access) {
          clientV3 = OSFactory.clientFromToken(token);
     }

    public void run() {
        // can now use the client :)
    }
}

V2的情況下：

// Grab the access from the client in the thread that did the authentication
Access access = os.getAccess();

// Spawn off a thread giving it the access
myThreadExecutor.submit(new MyRunnableOrCallable(access));

// Example of the Runnable or other object invoked in a new thread
public class MyRunnable implements Runnable {
     private OSClient clientV2;

     public MyRunnable(Access access) {
          clientV2 = OSFactory.clientFromAccess(access);
     }

    public void run() { 
        // can now use the client :)
    }
}