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Is it possible to detect if an exception occurred before I entered a finally block?

我有一个工作流方法可以做一些事情, 如果出错会丢弃一个例外。我想在我的工作流中添加报告标准。在下面最后一块, 是否有方法可以判断试捕区是否有一种方法丢弃了一个例外?

我可以添加我自己的捕获/发射代码, 但更希望更干净的解决方案,因为这是我在整个项目中重复使用的模式。

@Override
public void workflowExecutor() throws Exception {
  try {
      reportStartWorkflow();
      doThis();
      doThat();
      workHarder();
  } finally {
      /**
       * Am I here because my workflow finished normally, or because a workflow method
       * threw an exception?
       */
      reportEndWorkflow(); 
  }
}

Answer 1

Java没有自动提供的方法。您可以使用布林旗 :

boolean success = false;
try {
  reportStartWorkflow();
  doThis();
  doThat();
  workHarder();
  success = true;
} finally {
  if (!success) System.out.println("No success");
}

Answer 2

两种解决办法:将 reportEndWorkflow 调用两次,一次在 colpatch 块,一次在try 末尾:

try {
    // ...
    reportEndWorkflow("success");
} catch (MyException ex) {
    reportEndWorkflow("failure");
}

或者您可以引入布林变量 :

boolean finished = false;
try {
    // ...
    finished = true;
} finally {
    // ...
}

Answer 3

您在那里是因为您的试管区块已完成了执行。是否有例外被丢弃。

要区分出现例外或方法流程执行成功与否,您可以尝试这样做:

boolean isComplete = false;
try
{
  try
  {
    reportStartWorkflow();
    doThis();
    doThat();
    workHarder();
    isComplete = true;
  }
  catch (Exception e)
  {}
}
finally
{
  if (isComplete)
  {
    // TODO: Some routine
  }
}

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