This plugin allows you to use protocol buffers as arguments to your controllers' methods and to return protocol buffers to the client.
It is protocol-compatible with ProtoRPC, and makes writing RPC services super easy. For instance you could have a myproto.proto file declaring a few messages like this:
// Let's be compatible with mobile phones
option optimize_for = LITE_RUNTIME;
// Generated messages will be inner classes of com.github.jcayzac.Protos
option java_package = "com.github.jcayzac";
option java_outer_classname = "Protos";
// Protobuf package name
package protos;
message MyRequest {
required string name = 1;
optional int32 age = 2;
}
message MyResponse {
required string value = 1;
}Then, using the classes generated by protoc in your controllers becomes as simple as:
package controllers;
import play.mvc.Controller;
import com.github.jcayzac.Protos;
public class MyRpc extends Controller {
public static void myRPCMethod(final Protos.MyRequest request) {
Protos.MyResponse.Builder response = Protos.MyResponse.newBuilder();
response.setValue(doSomething(request.getName(), request.getAge()));
PBActions.render(response.build());
}
}You can test it from the command line, using curl and protoc:
$ echo "name: 'Bob X'" \
| protoc --encode=protos.MyRequest myproto.proto \
| curl -H 'content-type:application/x-google-protobuf' --data-binary @- http://localhost:9000/your/controller/route \
| protoc --decode=protos.MyResponse myproto.proto
value: 'Hello, Bob X!'- The RPC methods must have one argument, and one only.
- The RPC methods' single argument should always be named request. Otherwise the magic won't work.
- The requests must have their content-type set to application/x-google-protobuf. Responses rendered with renderProto() will be served with that MIME type, too.
- No support for JSON serialization of protocol buffers (which ProtoRPC supports, for debugging purpose)
This code is released under the terms of the Simplified BSD License below.
Copyright 2011 Julien Cayzac. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
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