package org.kodejava.example.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.servlet.Servlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ContextInitParameter extends HttpServlet implements Servlet {
public ContextInitParameter() {
}
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter writer = response.getWriter();
//
// Get an instance of ServletContext
//
ServletContext context = getServletContext();
//
// To read context initialization parameter we can call context.getInitParameter()
// and pass the name of initialization parameter to be read. If the named
// parameter does not exists the returned value will be null.
//
// In this example we read an initialization parameter called LOG.PATH
//
String logPath = context.getInitParameter("LOG.PATH");
writer.println("Log Path: " + logPath + "<br/>");
//
// Reads all the name of servlet's initialization parameters. If the
// servlet doesn't have any an empty enumeration will be returned.
//
Enumeration enumeration = context.getInitParameterNames();
while (enumeration.hasMoreElements()) {
String paramName = (String) enumeration.nextElement();
String paramValue = context.getInitParameter(paramName);
writer.println("Context Init Param: [" + paramName + " = " + paramValue + "]<br/>");
}
}
}
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