I have a pipeline with quite a few steps (just above 15). I want to report failures everytime a DoFn fails. I started implementing it through TupleTags with code such as :
我有一个有很多步骤的管道（刚刚超过15）。我想在每次DoFn失败时报告失败。我开始通过TupleTags实现它，代码如下：
try {
... do stuff ...
c.output(successTag, ...);
} catch (Exception e) {
c.output(failureTag, new Failure(...));
}
But since my pipeline contains a lot of steps, this make the pipeline definition code quite hard to read / maintain.
但由于我的管道包含很多步骤，这使得管道定义代码很难读取/维护。
Is there a more global way to achieve it ? Something like raising a custom exception which is handled globally at the pipeline level ?
是否有更全面的方式来实现它？提出在管道级别全局处理的自定义异常之类的东西？
1 个解决方案
#1
2
What you are doing is the correct approach to catch errors and output them differently. You will need this on each step though. You could use a java pattern to reuse it if you prefer. Create a base class for all your ParDos and in processElement add the exception handling code. Then implement your processElement in a separate function (i.e. processElementImpl) which you call in processElement.
您正在做的是捕获错误并以不同方式输出错误的正确方法。但是，您需要在每个步骤中使用此功能。如果您愿意，可以使用java模式重用它。为所有ParDos创建基类，并在processElement中添加异常处理代码。然后在processElement中调用的单独函数（即processElementImpl）中实现processElement。
#1
2
What you are doing is the correct approach to catch errors and output them differently. You will need this on each step though. You could use a java pattern to reuse it if you prefer. Create a base class for all your ParDos and in processElement add the exception handling code. Then implement your processElement in a separate function (i.e. processElementImpl) which you call in processElement.
您正在做的是捕获错误并以不同方式输出错误的正确方法。但是，您需要在每个步骤中使用此功能。如果您愿意，可以使用java模式重用它。为所有ParDos创建基类，并在processElement中添加异常处理代码。然后在processElement中调用的单独函数（即processElementImpl）中实现processElement。