org.apache.anteater.servlet
Class ListenerProxyServlet

java.lang.Object
  |
  +--javax.servlet.GenericServlet
        |
        +--javax.servlet.http.HttpServlet
              |
              +--org.apache.anteater.servlet.ListenerProxyServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class ListenerProxyServlet

extends javax.servlet.http.HttpServlet

This is the servlet which is registered with Tomcat to receive all the incoming HTTP requests.

When a request is received on a given path, the servlet will verify if there's a matching Listener waiting for an incoming request on that path. If no listener is registered a 404 error message is sent back to the client.

If there is a listener waiting for an HTTP request in the main Ant thread, the request is placed in a Queue, and the thread running the listener is awaken. This will give it the opportunity to execute the set of matchers against the incoming HTTP request. The servlet thread blocks at this point, waiting for the listener's thread to start writing the response back to the client.

When the listener finishes the matching, it starts writing the response on a PipedWriter object. The servlet thread waits at the other end of the pipe on a PipedReader. When the listener closes its end of the pipe, the servlet considers that the response to be sent was created, flushes all the data it has received back to the HTTP client, and returns from the service(ServletRequest, ServletResponse) method.

Since:

September 27, 2001

Version:

$Revision: 1.3 $ $Date: 2002/08/01 10:28:37 $

Author:

Ovidiu Predescu

See Also:

Serialized Form

Constructor Summary

ListenerProxyServlet()

Method Summary

void	service(javax.servlet.ServletRequest servletRequest, javax.servlet.ServletResponse servletResponse)

Methods inherited from class javax.servlet.http.HttpServlet

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

Methods inherited from class javax.servlet.GenericServlet

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ListenerProxyServlet

public ListenerProxyServlet()

Method Detail

service

public void service(javax.servlet.ServletRequest servletRequest,
                    javax.servlet.ServletResponse servletResponse)

Specified by:

service in interface javax.servlet.Servlet

Overrides:

service in class javax.servlet.http.HttpServlet