Webservice initialized on every method-call.

Question

Hello!
I have written two webservices. One containing a EJB and a SOAP-Webservice and one with just a SOAP-Webservice.
If I call the EJB-Version the webservice gets inizialized by glassfish on the first call and then stays running (Constructor is not called any more) but if I call the SOAP-only service constructor is called on every method-call.
Therefore I have a deployment-problem with the EJB-Version: I use SQL-Server-JDBC-Libs in my Netbeans-Project. The get deployed to the server but are not used by the application. Instead I have to copy them to the servers lib-directory. If I deploy them with my Soap-only-service they work...

Answer 1

For the Webservice-only I create a web-application in Netbeans (File - New Project - Java Web - Web Application) and run this code:
package com.service;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;
@WebService(serviceName = "Service")
public class Service {
    public Service() {
        System.out.println("Constructor called!");
    @WebMethod(operationName = "hello")
    public String hello(@WebParam(name = "name") String txt) {
        return "Hello " + txt + " !";
}Everytime i call the hello-method through the Tester (http://ip:port/URI?Tester) the webservice get initialized ("Constructor called").
On the other hand I create a Java EE - EJB-Module in Netbeans and add the webservice.
I remove the EJB-Annotations from the module and use it as a POJO for the code.
EJB:
package com.slan.ejb;
import javax.ejb.Stateless;
@Stateless
public class EJBSlan {
    public EJBSlan(){
        System.out.println("Constructor of EJB called!");
    public String getHello(String name) {
        return "Hello " + name;
}Service:
package com.slan.service;
import com.slan.ejb.EJBSlan;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.ejb.Stateless;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;
@WebService(serviceName = "EJBService")
@Stateless()
public class EJBService {
    private EJBSlan ejbRef;
    public EJBService(){
        ejbRef = new EJBSlan();
        System.out.println("Constructor of Service called!");
    @WebMethod(operationName = "getHello")
    public String getHello(@WebParam(name = "name") String name) {
        return ejbRef.getHello(name);
    @WebMethod(operationName = "getMachines")
    public String getMachines() {
        String machines = "";
        try {
            DriverManager.registerDriver(new com.mysql.jdbc.Driver());
            Connection c = DriverManager.getConnection("jdbc:mysql://ip/cm","user","password");
            Statement s = c.createStatement();
            ResultSet r = s.executeQuery("select  from machines");
            while(r.next()){
                machines += r.getString("comment");
            s.close();
            c.close();
        } catch (SQLException e) {
            System.out.println(e.toString());
        return machines;
}As you can see I already tried to add the sql-code to query the database. I added the mysql.jar to the project and deployed it. Using the tester the Service- and POJO-Object gets initialized only once but I cant use the mysql-driver cause it is not used on the server. But it gets deployed to the server... I think it's just not included in the class-path...