Using Z-Stack Gateway API in java

Hi

I want to create a gateway application by zigbee gateway API in java programming language .

Is any document for beginner?

My devices are cc2538EM+beaglebone black+cc2531dongle

This is my first code and it's output but i don't see any action:

code:

public class main
{
   public static void main(String [] args)
   {
      String serverName = "192.168.7.2";
      int port = 2533;
      Socket client=null;
      try
      {
         System.out.println("Connecting to " + serverName
                             + " on port " + port);
         client = new Socket(serverName, port);
         System.out.println("Just connected to "
                      + client.getRemoteSocketAddress());
         
         Gateway.DevSetOnOffStateReq.Builder onoff=Gateway.DevSetOnOffStateReq.newBuilder();
         Gateway.gwAddressStruct_t.Builder add=Gateway.gwAddressStruct_t.newBuilder();
         add.setIeeeAddr(0x00124B00040F0586L);
         add.setEndpointId(0x21);
         add.setAddressType(Gateway.gwAddressType_t.UNICAST);
         
         onoff.setDstAddress(add);
         onoff.setCmdId(Gateway.gwCmdId_t.DEV_SET_ONOFF_STATE_REQ);
         onoff.setState(Gateway.gwOnOffState_t.OFF_STATE);
         
         
         System.out.print(onoff.build().toString()+" Size:"+onoff.build().getSerializedSize()+" Out:");
         onoff.build().writeTo(System.out);
         System.out.println();
       
         OutputStream outToServer = client.getOutputStream();
         DataOutputStream out =
                       new DataOutputStream(outToServer);

//         out.write(onoff.build().getSerializedSize());
         onoff.build().writeTo(out);

         InputStream inFromServer = client.getInputStream();
         DataInputStream in =
                        new DataInputStream(inFromServer);
         while(true){
//        	 Gateway.DevGetOnOffStateRspInd.Builder onof=Gateway.DevGetOnOffStateRspInd.parseFrom(in).toBuilder(); 
//             System.out.println("response " + onof.toString());
         System.out.println("Server says " + in.read());
         }
         
      }catch(IOException e)
      {
         e.printStackTrace();
      }finally{
    	  try {
			client.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
      }
   }
}

Respones:

Connecting to 192.168.7.2 on port 2533
Just connected to /192.168.7.2:2533
cmdId: DEV_SET_ONOFF_STATE_REQ
dstAddress {
addressType: UNICAST
ieeeAddr: 5149013020968326
endpointId: 33
}
state: OFF_STATE

Server says 1
Server says 103
Server says 18
Server says 255
Server says 1
Server says 104
Server says 33
Server says 255