checking database from webservice netbeans - web-services

Question

sorry if my question confusing cause this is the first time i make a question. if there is something that i can do to make it clearer, just tell me so i can improve the way i'm asking.
currently i'm trying to make web service from netbeans that can check some data from database. Because i'm newbie so i followed tutorial from
http://programmerguru.com/webservice-tutorial/how-to-create-java-webservice-in-netbeans/ to make the web service.
but when i trying to check the database with my usual way with mybattis, it keep in give me java.lang.nulpointerexception. when i try to debug it, it give me "variable information not available, source compiled without -g option" and throw me to InvocationTargetException.java
public InvocationTargetException(Throwable target) {
super((Throwable)null); // Disallow initCause
this.target = target;
}
here is the code for the web service
/*
* To change this license header, choose License Headers in Project
Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package com.bismillah.berkah;
import com.bismillah.berkah.dao.DummyDao;
import com.bismillah.berkah.daoImpl.DummyDaoImpl;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;
import javax.jws.WebService;
import javax.jws.WebMethod;
import javax.jws.WebParam;
/**
*
* #author Ari
*/
#WebService(serviceName = "Check4Update")
public class Check4Update {
public DummyDaoImpl ddi;
/**
* This is a sample web service operation
*
* #param InTerminalNumber
* #return
*/
#WebMethod(operationName = "CheckUpdate")
public String hello(#WebParam(name = "InTerminalNumber") String InTerminalNumber) {
String OutError = "";
String OutMessage = "";
if (InTerminalNumber == null) {
return "InTerminalNumber can't be null";
} else {
Map mapdao = new HashMap<String, Object>();
Map map = new HashMap<String, Object>();
map.put("InTerminalNumber", InTerminalNumber);
mapdao = ddi.check4UpdatePatch(map);
OutError = (String) mapdao.get("OutError");
OutMessage = (String) mapdao.get("OutMessage");
return "Error : " + OutError + ", with message : " + OutMessage;
}
}
public void setDdi(DummyDaoImpl ddi) {
this.ddi = ddi;
}
}
and here is the code mybattis impl
package com.bismillah.berkah.daoImpl;
import com.bismillah.berkah.Check4Update;
import com.bismillah.berkah.config.MyBatisConnectionFactory;
import com.bismillah.berkah.dao.*;
import java.util.Map;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
/**
*
* #author Ari
*/
public class DummyDaoImpl
{
private SqlSessionFactory sqlSessionFactory;
public DummyDaoImpl()
{
sqlSessionFactory = MyBatisConnectionFactory.getSqlSessionFactory();
}
public Map check4UpdatePatch(Map map)
{
Check4Update c4u = new Check4Update();
c4u.setDdi(this);
SqlSession session = sqlSessionFactory.openSession();
try
{
session.selectOne("dummy.check4UpdatePatch", map);
} catch (Exception ex)
{
ex.toString();
} finally
{
session.close();
}
return map;
}
}
could you tell me how to fix it? so i can get the data? by the way i always get thrown at my web service, here exactly
mapdao = ddi.check4UpdatePatch(map);
once again sorry if my question confusing cause this is the first time i make a question. if there is something that i can do to make it clearer, just tell me so i can improve the way i'm asking.

Answer 1

sorry already found the problem, it is cause wrong configuration on mybatis.
i haven't change my string resource on MyBatisConnectionFactory, also the one at xml file.
maybe that's why i always get java lang nul.
actually when i trying to fix this, i make some interface class too, but still not working until i find my problem. if anyone have some problem like me maybe you can fix it with adding some interface so the impl will override the interface.