是否有支持/扩展java.lang.Exception的protobuf消息？

Question

我们正在尝试将CustomException表示为protobuf格式 -

public class CustomRestException extends RuntimeException {

private CustomRestErrorMessage customRestErrorMessage;
 public CustomRestException (CustomRestErrorMessage customRestErrorMessage, Throwable   cause) {
    super(cause);
    this.customRestErrorMessage= customRestErrorMessage;
 }
 public CustomRestException (CustomRestErrorMessage customRestErrorMessage) {
     this.customRestErrorMessage= customRestErrorMessage;
 }
}

public class CustomRestErrorMessage implements Serializable {

  private String causeMessage = "";
  private String errorCode = "";
  private String errorMessage = "";
  private String errorSubCode = "";
  private String stackTrace = "";
}

这是CustomRestExceptionProtos.proto文件

option java_package = "com.company.my.exception"; 
option java_outer_classname = "CustomRestExceptionProtos"; 

message CustomRestProtoException
 {
    required CustomRestProtoErrorMessage customRestErrorMessage = 1;
 }

message CustomRestProtoErrorMessage
 {
    required string errorCode = 1;
    required string errorMessage = 2;
    required string errorSubCode = 3;
    required string causeMessage = 4;     
    required string stackTrace= 5;
 }

是否可以将此“CustomRestExceptionProtos”表示为.proto文件中的java.lang.Exception类型？

Answer 1

如果我正确理解您的问题，您希望从CustomRestProtoException消息类型生成的Java类从java.lang.Exception开始。我认为你可能实现这一目标的唯一方法是编写一个插件来扩展java代码生成：

http://code.google.com/apis/protocolbuffers/docs/reference/java-generated.html#plugins

另一种更简单的方法是引入一个包装Java Exception子类来保存CustomRestProtoException对象：

public class CustomRestException extends Exception
{
    private CustomRestProtoException exception;

    // usual constructors etc.
}