503错误后活动重试作业

Question

我有许多服务任务调用休息服务，有时服务不可用。我想在我的JavaDelegate中能够无限地重试这项工作：

@Override
public void execute(DelegateExecution execution)
{
    try
    {
        //call_rest_service
    }
    catch (Exception503 error)
    {
        CommandContext commandContext = Context.getCommandContext();
        JobEntity jobEntity = commandContext.getJobEntityManager().findById(job.getId());
        jobEntity.setRetries(10);
        //then throw original error
    }
}

但这似乎不起作用！

Answer 1

我认为这是一种 SLOPPY 做事的方式，但如果你确定这是你想做的事情，我建议你这样做：

@Override
public void execute(DelegateExecution execution)
{
    int retryMax = 10, retryCount =0;
    while (retryCount++ < retryMax){
      try
      {
        //call_rest_service
      }
      catch (Exception503 error)
      {
        // sleep to not DDoS the server
        Thread.sleep(500);
      }
    }
}