index.html
<!DOCTYPE html>
<html>
<head>
<title>Hit Count Demo</title>
</head>
<body>
<form action="CCClient" method="post">
<input type="submit" value="Take Hit Count Demo with EJB Session Singleton Bean"/>
</form>
</body>
</html>
CCClient.java
package mypack;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ejb.EJB;
import mybeans.HitCntBean;
public class CCClient extends HttpServlet {
@EJB
HitCntBean cntBean;
protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet CCClient</title>");
out.println("</head>"); out.println("<body>");
out.println("<h1>You have visited this page: " + cntBean.incrHitCount() + " time/s</h1>");
out.println("</body>");
out.println("</html>");
}
}
}
HitCntBean.java
package mybeans;
import javax.ejb.Singleton;
@Singleton public class HitCntBean {
private int count;
public synchronized int incrHitCount()
{
return count++;
}
}
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