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package com.acme;
import javax.ejb.EJB;
import javax.ejb.ConcurrentAccessException;
import javax.ejb.ConcurrentAccessTimeoutException;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.annotation.WebServlet;
import javax.naming.*;
@EJB(name="helloStateful", beanInterface=HelloStateful.class)
@WebServlet(urlPatterns="/HelloServlet", loadOnStartup=1)
public class HelloServlet extends HttpServlet {
// Environment entries
private String foo = null;
@EJB HelloSingleton singleton;
@EJB Hello hello;
@EJB HelloRemote helloRemote;
@Override
public void init(ServletConfig config) throws ServletException {
super.init(config);
System.out.println("In HelloServlet::init");
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
System.out.println("In HelloServlet::doGet");
resp.setContentType("text/html");
PrintWriter out = resp.getWriter();
try {
HelloStateful sful = (HelloStateful) new InitialContext().lookup("java:comp/env/helloStateful");
sful.hello();
hello.foo();
} catch(Exception e) {
e.printStackTrace();
}
System.out.println("Remote intf bean says " +
helloRemote.hello());
System.out.println("Calling testNoWait. This one should work since it's not a concurrent invocation");
singleton.testNoWait();
System.out.println("Call async wait, then sleep a bit to make sure it takes affect");
singleton.asyncWait(1);
try {
// Sleep a bit to make sure async call processes before we proceed
Thread.sleep(100);
} catch(Exception e) {
System.out.println(e);
}
try {
System.out.println("Calling testNoWait");
singleton.testNoWait();
throw new RuntimeException("Expected ConcurrentAccessException");
} catch(ConcurrentAccessTimeoutException cate) {
throw new RuntimeException("Expected ConcurrentAccessException");
} catch(ConcurrentAccessException cae) {
System.out.println("Got expected exception for concurrent access on method with 0 wait");
}
singleton.wait(10);
singleton.reentrantReadWrite();
singleton.callSing2WithTxAndRollback();
singleton.hello();
singleton.read();
singleton.write();
singleton.reentrantReadRead();
singleton.reentrantWriteWrite();
singleton.reentrantWriteRead();
out.println("<HTML> <HEAD> <TITLE> JMS Servlet Output </TITLE> </HEAD> <BODY BGCOLOR=white>");
out.println("<CENTER> <FONT size=+1 COLOR=blue>DatabaseServelt :: All information I can give </FONT> </CENTER> <p> " );
out.println("<FONT size=+1 color=red> Context Path : </FONT> " + req.getContextPath() + "<br>" );
out.println("<FONT size=+1 color=red> Servlet Path : </FONT> " + req.getServletPath() + "<br>" );
out.println("<FONT size=+1 color=red> Path Info : </FONT> " + req.getPathInfo() + "<br>" );
out.println("</BODY> </HTML> ");
}
}