Question

我正在尝试在基于Spring的Web应用程序中使用并发机制。所以我使用下面的方法来使用线程概念来获取员工的详细信息。但由于弹簧上下文在线程上为空，我的Null指针异常失败。

我使用了以下代码：

ThreadPoolTaskExecutor threadPool = new ThreadPoolTaskExecutor();
            threadPool.setCorePoolSize(10);
            threadPool.initialize();

            ExecutorServiceAdapter adapter = new ExecutorServiceAdapter(threadPool);
            List<Callable<Employee>> tasks = new ArrayList<Callable<Employee>>();

            for (int i = 0; i < employeeArr.length; i++) {
                final int value = i;
                tasks.add(new Callable<Employee>() {
                    public Employee call() throws Exception {
                        return empService.getEmployeeDetails(employeeArr[value], finalFromDate);
                    }
                });
            }


            try {
                List<Future<Employee>> result = adapter.invokeAll(tasks);
                for (int i = 0; i < result.size(); i++) {
                    System.out.println(result.get(i).get());
                }
            } catch (ExecutionException ex) {
                ex.printStackTrace();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

在＆＃34; empService.getEmployeeDetails＆＃34;方法，我使用下面的代码引用Spring上下文：

Authentication auth = SecurityContextHolder.getContext().getAuthentication();
    Collection<GrantedAuthority> authorities = auth.getAuthorities();

但是在访问spring上下文时我得到空指针异常。

有人可以帮我这个吗？

Answer 1

您可以利用org.springframework.security.task.DelegatingSecurityContextAsyncTaskExecutor。尝试这样的事情：

ThreadPoolTaskExecutor threadPool = new ThreadPoolTaskExecutor();
threadPool.setCorePoolSize(10);
threadPool.initialize();

TaskExecutor taskExecutor = new DelegatingSecurityContextAsyncTaskExecutor(threadPool);

ExecutorServiceAdapter adapter = new ExecutorServiceAdapter(taskExecutor);

...

传播Spring安全上下文

1 个答案: