Question

我在mule中使用自定义变换器，为此我正在编写自定义java代码，它扩展了AbstractMessageTransformer。

我在自定义java类中面临一个问题，因为我需要处理FileNotFoundException 它说FileNotFoundException与AbstractMessageTransformer不兼容。

有没有办法在扩展AbstractMessageTransformer的自定义java类中处理FileNotFoundException？

Answer 1

如果要在扩展 AbstractMessageTransformer 的类中重新抛出 FileNotFoundException ，那么您应该将该异常包装成 TransformerException ， doTransform 方法抛出的那个

您的方法将如下所示

    try{
        //Your custom transformation
    } catch(FileNotFoundException e){
        Message msg = CoreMessages.transformFailedBeforeFilter();
        throw new TransformerException(msg,this, e);
    }

Answer 2

public class MessageAttachmentTransformer extends AbstractMessageTransformer
{private List<String> filename; // file to attach
    @SuppressWarnings("deprecation")
    public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException {
        if (filename.isEmpty() || filename==null || filename.size()==0) **//filename is a list contains list of file path as mule attachment**
        {**//If file for attachment is not there**
            **//Here I want to place FileNotFoundException**
            return message;} else
        { // do other thing} return message;
        } 
    }
}

如何在Java类中处理FileNotFoundException，在Mule中扩展AbstractMessageTransformer？

2 个答案: