共享servlet的fileIO？ [英] Shared servlet for fileIO?

问题描述

假设有一个 webservice 或 servlet ，它可以执行一些 fileIO 。
如何确保如果多个客户端执行相应的WS方法，那么fileIO仍然只能由一个线程处理？因此，没有数据丢失，因为几个客户端触发fileIO？$ / b>
$ b

我应该搜索哪个方向？

解决方案

最好的办法是让读取/写入的同步对象的底层方法。 （例如File对象可能是最简单的）。

  private static File theFile = new File（theonetoopen.txt）; 
 ... 
 
 private void someImportantIOMethod（Object stuff）{
 synchronized（theFile）{
 
 //您的文件输出在此处写入代码。 
 
} 
} 
  

Imagine having a webservice or servlet, which can perform some fileIO. How can I make sure that if more than one client executes the according WS method, that the fileIO is still handled only by one single "thread"? So that no data is lost because several clients trigger the fileIO?

Which direction should I search for?

解决方案

The best bet is likely to just make the underlying method(s) that read/write synchronize on a common object. (eg. the File object could be easiest).

private static File theFile = new File("theonetoopen.txt");
...

private void someImportantIOMethod(Object stuff){
    synchronized(theFile){

    //Your file output writing code here.

    }
}

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