java - 如何声明一个具有以 String 和 Map 作为参数的构造函数的 bean？

Question

我正在使用 ThreadPoolExecutor 实用程序并通过被调用类中的构造函数传递值。构造函数采用两个参数 (1) 一个映射 (2) 一个字符串。

我对如何为被调用的类声明一个 bean 感到困惑，该类需要两个参数(一个映射和一个字符串)。我的代码如下。

***Calling Class***

    public class Starter {

        ProcessScheduler deleteBatch;
        public ProcessScheduler getDeleteBatch() {
            return deleteBatch;
            }

        public void setDeleteBatch(ProcessScheduler deleteBatch) {
            this.deleteBatch = deleteBatch;
            }


        public void start() {

        ThreadPoolExecutor executor = testThreadPoolExecutorService.createNewThreadPool();


            for (int i=0;i<=5;i++)
            {
            Map m4 = arrayRecords.get(i);
            executor.execute(new ProcessScheduler("Thread #"+i,m4));                     // Comment - started 
The above line executes fine but it gives null pointer error if I will call any other method from the run() inside  called class(ProcessScheduler). So I have use a Bean such as executor.execute(getDeleteBatch("Thread #"+i,m4)) to get the instance of the bean. But I dont know how to do this in this case?

// Comment - ended


            }

***Called Class***



public class ProcessScheduler implements Runnable {

         public ProcessScheduler(String taskName, Map m) {
            this.taskName = taskName;
            this.deleteRecordsMap = (HashMap) m;
            }
        Processor processor;
        public Processor getProcessor() 
        {
            return processor;
        }


        public void setProcessor(Processor mappProcessor) {
            this.mappProcessor = mappProcessor;
        }


        public void run() 
        {
        // This returns null 
        processor.getNumbers();
        }

        }



I have some confusions as below.
(1) How to declare a bean for ProcessScheduler in this case. 
(2) Is the declaration of getDeleteBatch is correct in this case like below?

public ProcessScheduler getDeleteBatch() {
            return deleteBatch;
            }

谢谢正达夫

Answer 1

你真的认为这是个好主意吗？

public ProcessScheduler(String taskName, Map m) {
    this.taskName = taskName;
    this.RecordsMap = (HashMap) m;
}

我认为应该更像这样:

public ProcessScheduler(String taskName, Map m) {
    this.taskName = taskName;
    this.recordsMap = new HashMap(m);  // You don't want changes to the Map passed in to show up in your private data member.
}

我不确定您是否可以将 ProcessScheduler 实例从 Spring 作为 Bean 注入(inject)；在这种情况下，您可能确实想为每个执行程序服务创建一个新的服务。

Spring 不需要控制应用程序中的每个 bean。