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package org.glassfish.tests.paas.multipleshareddbservicetest;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.PreparedStatement;
import java.sql.DatabaseMetaData;
import java.util.Enumeration;
import javax.annotation.Resource;
public final class EmployeeServlet extends HttpServlet {
@Resource(mappedName = "java:app/jdbc/SalaryRes")
private DataSource salDs = null;
@Resource(mappedName = "java:app/jdbc/HrRes")
private DataSource hrDs = null;
/**
* Respond to a GET request for the content produced by
* this servlet.
*
* @param request The servlet request we are processing
* @param response The servlet response we are producing
* @throws IOException if an input/output error occurs
* @throws ServletException if a servlet error occurs
*/
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
System.out.println("Servlet processing do get..");
response.setContentType("text/html");
PrintWriter writer = response.getWriter();
writer.println("<html>");
writer.println("<head>");
writer.println("<title>Multiple Shared DB Service Test</title>");
writer.println("</head>");
writer.println("<body bgcolor=white>");
writer.println("<table border=\"0\">");
writer.println("<tr>");
writer.println("<td>");
writer.println("<img height=\"200\" width=\"200\" src=\"images/numbers.jpg\">");
writer.println("</td>");
writer.println("<td>");
writer.println("<h1>Multiple Shared DB Service PaaS Application</h1>");
writer.println("</td>");
writer.println("</tr>");
writer.println("</table>");
writer.println("<table border=\"0\" width=\"100%\">");
Enumeration names = request.getHeaderNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
writer.println("<tr>");
writer.println(" <th align=\"right\">" + name + ":</th>");
writer.println(" <td>" + request.getHeader(name) + "</td>");
writer.println("</tr>");
}
writer.println("</table>");
if (hrDs != null && salDs != null) {
Statement stmt1 = null;
PreparedStatement stmt2 = null;
try {
stmt1 = hrDs.getConnection().createStatement();
DatabaseMetaData dbMetadata1 = stmt1.getConnection().getMetaData();
String dbUrl1 = dbMetadata1.getURL();
writer.println("DB URL : " + dbUrl1 + "\n");
if (dbUrl1.indexOf("hr_database") == -1) {
throw new Exception("Custom Database [hr_database] is not created while provisioning.");
}
ResultSet rs1 = stmt1.executeQuery("SELECT emp_id, emp_name from HR");
String salQuery = "SELECT emp_sal from SALARY WHERE emp_id = ? ";
stmt2 = salDs.getConnection().prepareStatement(salQuery);
DatabaseMetaData dbMetadata2 = stmt2.getConnection().getMetaData();
String dbUrl2 = dbMetadata2.getURL();
writer.println("DB URL : " + dbUrl2 + "\n");
if (dbUrl2.indexOf("salary_database") == -1) {
throw new Exception("Custom Database [salary_database] is not created while provisioning.");
}
writer.println("<table border=\"1\" width=\"100%\">");
writer.println("<tr>");
writer.println(" <th align=\"left\" colspan=\"2\">" + "Employee Information retrieved" + "</th>");
writer.println("</tr>");
writer.println("<tr>");
writer.println("<td>" + "Employee ID" + "</td>");
writer.println("<td>" + "Employee Name" + "</td>");
writer.println("<td>" + "Employee Salary" + "</td>");
writer.println("</tr>");
while (rs1.next()) {
writer.println("<tr>");
writer.println(" <td>" + rs1.getObject(1) + "</td>");
writer.println(" <td>" + rs1.getObject(2) + "</td>");
stmt2.setInt(1, (Integer) rs1.getObject(1));
ResultSet rs2 = stmt2.executeQuery();
while(rs2.next()) {
writer.println(" <td>" + rs2.getObject(1) + "</td>");
}
writer.println("</tr>");
}
writer.println("</table>");
} catch (Exception ex) {
ex.printStackTrace(writer);
} finally {
if (stmt1 != null) {
try {
stmt1.getConnection().close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (stmt2 != null) {
try {
stmt2.getConnection().close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
} else {
}
writer.println("</body>");
writer.println("</html>");
}
}