傳播Spring安全上下文

Question

我正在嘗試在基於Spring的Web應用程序中使用並發機制。 因此，我已使用以下方法使用線程概念來獲取員工詳細信息。 但是由於Spring上下文在線程上為null，所以我失敗了Null指針異常。

我使用了以下代碼：

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“ empService.getEmployeeDetails”方法中，我通過使用以下代碼來引用Spring上下文：

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

但是在訪問spring上下文時，我得到了空指針異常。

有人可以幫我嗎？

Answer 1

您可以利用org.springframework.security.task.DelegatingSecurityContextAsyncTaskExecutor 。 嘗試這樣的事情：

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

TaskExecutor taskExecutor = new DelegatingSecurityContextAsyncTaskExecutor(threadPool);

ExecutorServiceAdapter adapter = new ExecutorServiceAdapter(taskExecutor);

...