GWT: How to serialize objects

Question

I'd like to know if it is possible to use the serializer of GWT. When using the rpc-mechnism of GWT, GWT serializes the objects on the client and deserializes the objects on the server. For this mechanism you have to use special servlets ( RemoteServiceServlet ) of GWT. But i want to use the normal HttpServlets and therefore i have to serialize and deserialize the objects by myself.

Answer 1

All the code you need to look at is in the RemoteServiceServlet.java . Focus on the processCall method.

The RPC.decodeRequest(payload, ...) will give you a RPCRequest object which includes the method to be called and the deserialized parameters.

To encode the response focus on RPC.invokeAndEncodeResponse() and RPC.encodeResponseForSuccess() methods.

[EDITED]

In client-side it's worth to take a look to the proxy classes generated by the RPC generator, concretely the YourService_Proxy.java file. Generated files are left somewhere in your project's folder structure after compiling a project (you can indicate this folder with the -gen though).

The interesting code is in in the RemoteServiceProxy , looking at the createStreamWritter method, you can see how to serialize your objects. In the createStreamReader you can see how to deserialize a message from the server.

Answer 2

See gwt-byte-serializer

SerializerInt ser = new Serializer();
ser.writeValue("test");
ser.writeValue(new int[]{5,1,6});

String buffer = ser.getBuffer();

SerializerInt des = new Serializer(buffer);

des.readString()
des.readIntegerArr()