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package client;
import javax.annotation.Resource;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.naming.InitialContext;
import javax.transaction.UserTransaction;
import javax.transaction.Status;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
import javax.sql.DataSource;
import javax.xml.ws.*;
import endpoint.ejb.*;
public class Client extends HttpServlet {
//@WebServiceRef(name="sun-web.serviceref/HelloEJBService")
HelloEJBService service = new HelloEJBService();
@Resource(mappedName="jdbc/__default") private DataSource ds;
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws javax.servlet.ServletException {
doPost(req, resp);
}
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws javax.servlet.ServletException {
UserTransaction ut = null;
// Create Table with name CUSTOMER_rb. This name will be used in the EJB
String tableName = "CUSTOMER_rb";
Connection con = null;
try {
con = ds.getConnection();
con.setAutoCommit(true);
createTable(con, tableName);
ut = (UserTransaction) new InitialContext().lookup("java:comp/UserTransaction");
ut.begin();
System.out.println(" Service is :" + service);
Hello port = service.getHelloEJBPort();
String ret = port.sayHello("Appserver Tester !");
System.out.println("Return value from webservice:"+ret);
System.out.println("**** rollbacking transaction");
// ut.rollback();
ut.setRollbackOnly();
if(ut.getStatus() != Status.STATUS_MARKED_ROLLBACK) {
ret += "FAILED";
}
if(isDataPresent(con, tableName)) {
ret += "FAILED";
}
PrintWriter out = resp.getWriter();
resp.setContentType("text/html");
out.println("");
out.println("");
out.println("TestServlet");
out.println("");
out.println("");
out.println("");
out.println("So the RESULT OF EJB webservice IS :");
out.println("
");
out.println("[" + ret + "]");
out.println("");
out.println("");
dropTable(con, tableName);
} catch(Exception e) {
e.printStackTrace();
}finally {
try {
if(con != null) con.close();
} catch (SQLException se) {}
}
}
// use this table in the EJB webservice
private void createTable(Connection con, String tableName) throws Exception {
System.out.println("**** auto commit = " + con.getAutoCommit());
PreparedStatement pStmt =
con.prepareStatement("CREATE TABLE "+tableName+" (NAME VARCHAR(30) NOT NULL PRIMARY KEY, EMAIL VARCHAR(30))");
pStmt.executeUpdate();
}
private void dropTable(Connection con, String tableName) throws Exception {
PreparedStatement pStmt = con.prepareStatement("DROP TABLE "+tableName);
pStmt.executeUpdate();
}
// Check whether the EJB webservice has updated the data in the table.
private boolean isDataPresent(Connection con, String tableName) throws Exception {
PreparedStatement pStmt = con.prepareStatement("SELECT NAME, EMAIL FROM "+tableName);
ResultSet rs = pStmt.executeQuery();
while(rs.next()) {
String db_Name = rs.getString(1);
String db_Email = rs.getString(2);
System.out.println("NAME="+db_Name+", EMAIL="+db_Email);
rs.close();
return true;
}
return false;
}
}