chat

Class ChatServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

chat.ChatServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig, org.apache.catalina.comet.CometProcessor

public class ChatServlet
extends javax.servlet.http.HttpServlet
implements org.apache.catalina.comet.CometProcessor

Helper class to implement Comet functionality.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	ChatServlet.MessageSender Poller class.

Field Summary

Fields

Modifier and Type	Field and Description
protected ArrayList<javax.servlet.http.HttpServletResponse>	connections
protected ChatServlet.MessageSender	messageSender

Constructor Summary

Constructors

Constructor and Description
ChatServlet()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	begin(org.apache.catalina.comet.CometEvent event, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
void	destroy()
protected void	end(org.apache.catalina.comet.CometEvent event, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
protected void	error(org.apache.catalina.comet.CometEvent event, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
void	event(org.apache.catalina.comet.CometEvent event) Process the given Comet event.
protected static String	filter(String message) Filter the specified message string for characters that are sensitive in HTML.
void	init()
protected void	read(org.apache.catalina.comet.CometEvent event, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
protected void	service(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)

Methods inherited from class javax.servlet.http.HttpServlet

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

Methods inherited from class javax.servlet.GenericServlet

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

Methods inherited from interface javax.servlet.Servlet

getServletConfig, getServletInfo, init, service

Field Detail

connections

protected ArrayList<javax.servlet.http.HttpServletResponse> connections

messageSender

protected transient ChatServlet.MessageSender messageSender

Constructor Detail

ChatServlet

public ChatServlet()

Method Detail

init

public void init()
          throws javax.servlet.ServletException

Overrides:

init in class javax.servlet.GenericServlet

Throws:

javax.servlet.ServletException

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Servlet

Overrides:

destroy in class javax.servlet.GenericServlet

event

public void event(org.apache.catalina.comet.CometEvent event)
           throws IOException,
                  javax.servlet.ServletException

Process the given Comet event.

Specified by:

event in interface org.apache.catalina.comet.CometProcessor

Parameters:

event - The Comet event that will be processed

Throws:

IOException

javax.servlet.ServletException

begin

protected void begin(org.apache.catalina.comet.CometEvent event,
         javax.servlet.http.HttpServletRequest request,
         javax.servlet.http.HttpServletResponse response)
              throws IOException

Throws:

IOException

end

protected void end(org.apache.catalina.comet.CometEvent event,
       javax.servlet.http.HttpServletRequest request,
       javax.servlet.http.HttpServletResponse response)
            throws IOException

Throws:

IOException

error

protected void error(org.apache.catalina.comet.CometEvent event,
         javax.servlet.http.HttpServletRequest request,
         javax.servlet.http.HttpServletResponse response)
              throws IOException

Throws:

IOException

read

protected void read(org.apache.catalina.comet.CometEvent event,
        javax.servlet.http.HttpServletRequest request,
        javax.servlet.http.HttpServletResponse response)
             throws IOException

Throws:

IOException

service

protected void service(javax.servlet.http.HttpServletRequest request,
           javax.servlet.http.HttpServletResponse response)
                throws IOException,
                       javax.servlet.ServletException

Overrides:

service in class javax.servlet.http.HttpServlet

Throws:

IOException

javax.servlet.ServletException

filter

protected static String filter(String message)

Filter the specified message string for characters that are sensitive in HTML.

Parameters:

message - The message string to be filtered