RestFul 2请求

Question

当我同时做两个请求时，我的回报是混合的。

我在浏览器上进行测试。

TAB 1

localhost:8089/WebApplication2/resources/teste1?rep=2&clone=2
RETURN
{"codRepresentante":2,"codRetWS":100,"msgRetWS":"WebService de teste consumido com sucesso"}

TAB 2

localhost:8089/WebApplication2/resources/teste1?rep=1&clone=1
RETURN
{"codRepresentante":2,"codRetWS":100,"msgRetWS":"WebService de teste consumido com sucesso"}

我该如何解决？ 我的代码怎么了？

RETORNO1WS.JAVA

package base;
public final class Retorno1WS {
    private static int CodRetWS;
    private static int CodRepresentante;
    private static String MsgRetWS;

    public synchronized int getCodRetWS() {
        return Retorno1WS.CodRetWS;
    }

    public synchronized void setCodRetWS(int CodRetWS) {
        Retorno1WS.CodRetWS = CodRetWS;
    }

    public synchronized int getCodRepresentante() {
        return Retorno1WS.CodRepresentante;
    }

    public synchronized void setCodRepresentante(int CodRepresentante) {
        Retorno1WS.CodRepresentante = CodRepresentante;
    }

    public synchronized String getMsgRetWS() {
        return Retorno1WS.MsgRetWS;
    }

    public synchronized void setMsgRetWS(String MsgRetWS) {
        Retorno1WS.MsgRetWS = MsgRetWS;
    }

}

TESTE1WS.JAVA

package ws;

import base.Retorno1WS;
import java.sql.SQLException;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ejb.Stateless;
import javax.ws.rs.*;

@Stateless
@Path("/teste1")
public class Teste1WS  {

    /**
     * 
     * @throws SQLException
     */
    public Teste1WS() throws SQLException, Exception {
        super();
    }

    @GET
    @Produces("application/json")
    public synchronized Retorno1WS getTeste(@DefaultValue("0") @QueryParam("rep") int CodRep) {

            Retorno1WS RetWS1 = new Retorno1WS();
            RetWS1.setCodRetWS(100);
            RetWS1.setMsgRetWS("WebService de teste consumido com sucesso");
            RetWS1.setCodRepresentante(CodRep);     

            Random rand = new Random();
            int randomNum = rand.nextInt((1500 - 500) + 1) + 500;

            try {
                Thread.sleep(randomNum);
            } catch (InterruptedException ex) {
                Logger.getLogger(Teste1WS.class.getName()).log(Level.SEVERE, null, ex);
            }

            return RetWS1;
    }

}