@Inject instance is null on start up servlet
vipinlal.tg Nov 25, 2015 12:28 AMHello All,
am new in CDI, (Container Dependency Injection).
My problem is and injecting one bean class and using that injected bean class instance used in servlet constructor.
The servlet is call on start up of server, on that time am getting null at the point of injected bean instance.
How can i resolve this issue
Am highlighting the Injecting bean part with red color
import java.io.IOException;
import java.util.Date;
import java.util.Timer;
import java.util.concurrent.TimeUnit;
import javax.inject.Inject;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.beo.udi.fda.access.MasAccess;
import com.beo.udi.util.ApplicationFilePath;
import com.beo.udi.util.AutoFileChecker;
/**
* Servlet implementation class InitialServlet
*/
@WebServlet("/InitialServlet")
public class InitialServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
int MIN_TIME= 1000 * 60;
/**
* @see HttpServlet#HttpServlet()
*/
@Inject MasAccess mas;
public InitialServlet() {
super();
new ApplicationFilePath();
Timer time = new Timer();
AutoFileChecker task = new AutoFileChecker();
time.schedule(task, new Date(), TimeUnit.MINUTES.toMinutes(MIN_TIME));
mas.checkCount(); //getting null pointer exception here
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().append("Served at: ").append(request.getContextPath());
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
Thanks & Regards
Vipin