Protobuf RPC Pro is a java protocol buffers RPC implementation featuring bidirectional RPC calls and TCP socket connection re-use and the option of secure communications.
'com.googlecode.protobuf-rpc-pro:protobuf-rpc-pro-duplex:3.2.1'
<dependency>
<groupId>com.googlecode.protobuf-rpc-pro</groupId>
<artifactId>protobuf-rpc-pro-duplex</artifactId>
<version>3.2.1</version>
</dependency>
<dependency org="com.googlecode.protobuf-rpc-pro" name="protobuf-rpc-pro-duplex" rev="3.2.1"/>
"com.googlecode.protobuf-rpc-pro", "protobuf-rpc-pro-duplex", "3.2.1"