com.buglabs.osgi.http.test
Class CounterServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          com.buglabs.osgi.http.test.CounterServlet

All Implemented Interfaces:

java.io.Serializable, Servlet, ServletConfig

public class CounterServlet
extends HttpServlet

A place to store counters for concurrency tests.

See Also:

Serialized Form

Constructor Summary

CounterServlet()

Method Summary

protected void	doGet(HttpServletRequest arg0, HttpServletResponse arg1) Called by the server (via the service method) to allow a servlet to handle a GET request.
void	init(ServletConfig arg0) Called by the servlet container to indicate to a servlet that the servlet is being placed into service.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CounterServlet

public CounterServlet()

Method Detail

init

public void init(ServletConfig arg0)
          throws ServletException

Description copied from class: GenericServlet

Called by the servlet container to indicate to a servlet that the servlet is being placed into service. See Servlet.init(javax.servlet.ServletConfig).

This implementation stores the ServletConfig object it receives from the servlet container for later use. When overriding this form of the method, call super.init(config).

Specified by:

init in interface Servlet

Overrides:

init in class GenericServlet

Parameters:

arg0 - the ServletConfig object that contains configutation information for this servlet

Throws:

ServletException - if an exception occurs that interrupts the servlet's normal operation

See Also:

UnavailableException

doGet

protected void doGet(HttpServletRequest arg0,
                     HttpServletResponse arg1)
              throws ServletException,
                     java.io.IOException

Description copied from class: HttpServlet

Called by the server (via the service method) to allow a servlet to handle a GET request.

Overriding this method to support a GET request also automatically supports an HTTP HEAD request. A HEAD request is a GET request that returns no body in the response, only the request header fields.

When overriding this method, read the request data, write the response headers, get the response's writer or output stream object, and finally, write the response data. It's best to include content type and encoding. When using a PrintWriter object to return the response, set the content type before accessing the PrintWriter object.

The servlet container must write the headers before committing the response, because in HTTP the headers must be sent before the response body.

Where possible, set the Content-Length header (with the ServletResponse.setContentLength(int) method), to allow the servlet container to use a persistent connection to return its response to the client, improving performance. The content length is automatically set if the entire response fits inside the response buffer.

The GET method should be safe, that is, without any side effects for which users are held responsible. For example, most form queries have no side effects. If a client request is intended to change stored data, the request should use some other HTTP method.

The GET method should also be idempotent, meaning that it can be safely repeated. Sometimes making a method safe also makes it idempotent. For example, repeating queries is both safe and idempotent, but buying a product online or modifying data is neither safe nor idempotent.

If the request is incorrectly formatted, doGet returns an HTTP "Bad Request" message.

Overrides:

doGet in class HttpServlet

Parameters:

arg0 - an HttpServletRequest object that contains the request the client has made of the servlet

arg1 - an HttpServletResponse object that contains the response the servlet sends to the client

Throws:

ServletException - if the request for the GET could not be handled

java.io.IOException - if an input or output error is detected when the servlet handles the GET request

See Also:

ServletResponse.setContentType(java.lang.String)