rockXiaofeng commented on pull request #1087:
URL: https://github.com/apache/dubbo-go/pull/1087#issuecomment-802610442
FYI (from com.alibaba/dubbo) :
```
public class DecodeableRpcInvocation extends RpcInvocation implements Codec,
Decodeable {
...
@Override
public Object decode(Channel channel, InputStream input) throws
IOException {
ObjectInput in = CodecSupport.getSerialization(channel.getUrl(),
serializationType)
.deserialize(channel.getUrl(), input);
String dubboVersion = in.readUTF();
request.setVersion(dubboVersion);
setAttachment(Constants.DUBBO_VERSION_KEY, dubboVersion);
setAttachment(Constants.PATH_KEY, in.readUTF());
setAttachment(Constants.VERSION_KEY, in.readUTF());
...
Map<string, string=""> map = (Map<string, string="">)
in.readObject(Map.class);
if (map != null && map.size() > 0) {
Map<string, string=""> attachment = getAttachments();
if (attachment == null) {
attachment = new HashMap<string, string="">();
}
attachment.putAll(map);
setAttachments(attachment);
}
//decode argument ,may be callback
for (int i = 0; i < args.length; i++) {
args[i] = decodeInvocationArgument(channel, this, pts, i,
args[i]);
}
setArguments(args);
```
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