如何为大型界面创建包装 [英] How to create a wrapper for a large interface

问题描述

我想创建一个包装器来捕获特定的异常，并在大型（100多种方法）接口中重试所有方法。我有重试代码，不用担心，但我无法弄清楚如何在不切割所有方法的情况下连接界面的实现。

我尝试使用缺少的方法处理程序，但这意味着我无法实现接口。摘要很明显，因为我无法实例化它。

我希望得到一个更好的解决方案，而不是将它作为模板创建，但我我愿意这样做。

解决方案

我尝试使用@ dmahapatro的示例，但不断收到IllegalArgumentException。我最终意识到，它只发生在mixin方法中（该方法显示mixin的签名）。

  errorProneInstance.metaClass.invokeMethod = {}我不需要调用（）我需要使用doMethodInvoke（）来获得适当的类型转换。字符串名称，参数 - > 
 def结果
 
 def method = delegate.metaClass.getMetaMethod（name，args）
 
 while（true）{
 try {
 result = method.doMethodInvoke（delegate，args）
 
 break 
 
} catch（AnnoyingIntermittentButRetryableException e）{
 print忽略异常
} 
 
 
结果
} 
  

I want to create a wrapper that traps a particular exception and retries for all methods in a large (100+ methods) interface. I have the retry code working no worries, but I can't figure out how to hook up an implementation of the interface without cut'n'paste into all the methods.

I tried to use a missing method handler but that meant that I couldn't have it implement the interface. Abstract is obviously out as I won't be able to instantiate it.

I'm hoping for a better solution than creating the class as a template on the fly but I'm willing to do that.

解决方案

I tried to use @dmahapatro's example but I kept getting IllegalArgumentException. I eventually realised that it only happened for mixin methods (the method shows the signature of the mixin). Instead of invoke() I needed to use doMethodInvoke() to get the appropriate type coersion.

errorProneInstance.metaClass.invokeMethod = { String name, args -> 
    def result

    def method = delegate.metaClass.getMetaMethod(name, args)

    while(true) {
        try {
            result = method.doMethodInvoke(delegate, args)

            break

        } catch (AnnoyingIntermittentButRetryableException e) {
            print "ignoring exception"
        }
    }

    result
}

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