怎么对 Dubbo的业务异常进行统一封装

[wcc1433]

想定义一个 provider端的 filter，将业务异常封装之后返回 {"code": 500, "msg": "xxx"}给 consumer端。但是在网上找到的都是通过 spring aop的方式进行处理的。

下面是我自己的一个示例(不知道怎么封装成 result)：

@activate(group = {CommonConstants.PROVIDER}, order = -2)
public class ExceptionFilter implements Filter {
@OverRide
public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
Result result = invoker.invoke(invocation);
if (result.getException() instanceof BaseException) {
// 判断抛出的异常是否为业务异常
BaseException exception = (BaseException) result.getException();
result = ???
} else if (result.getException() instanceof Exception) {
result = ???
}

    return result;
}

}

[AlbumenJ]

You can try this.

@Activate(group = CommonConstants.PROVIDER)
public class ResultConvertFilter implements Filter, BaseFilter.Listener {
    @Override
    public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
        return invoker.invoke(invocation);
    }

    @Override
    public void onResponse(Result appResponse, Invoker<?> invoker, Invocation invocation) {
        if (appResponse.hasException()) {
            // reset value
            appResponse.setValue(new Object());
            appResponse.setException(null);
        } else {
            Object originValue = appResponse.getValue();
            if (originValue instanceof Exception) {
                // reset value
                appResponse.setValue(new Object());
            }
        }
    }

    @Override
    public void onError(Throwable t, Invoker<?> invoker, Invocation invocation) {
        // framework error, can be ignore
    }
}

[wcc1433]

感谢大佬的示例