org.directwebremoting.servlet
Class CachingHandler

java.lang.Object
  org.directwebremoting.servlet.CachingHandler

All Implemented Interfaces:

Handler

Direct Known Subclasses:

TemplateHandler

public abstract class CachingHandler
extends java.lang.Object
implements Handler

A handler that deals with ETags and other nonsense to do with keeping a browsers cache in-sync with a web server.

Author:

Joe Walker [joe at getahead dot ltd dot uk]

Constructor Summary

CachingHandler()

Method Summary

abstract java.lang.String	generateCachableContent(java.lang.String contextPath, java.lang.String servletPath, java.lang.String pathInfo) Create a String which can be cached and sent as a 302.
java.lang.String	getMimeType()
void	handle(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Handle a URL request that has been mapped to this Handler
void	setIgnoreLastModified(boolean ignoreLastModified)
void	setMimeType(java.lang.String mimeType) The mime type to send the output under

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingHandler

public CachingHandler()

Method Detail

handle

public void handle(javax.servlet.http.HttpServletRequest request,
                   javax.servlet.http.HttpServletResponse response)
            throws java.io.IOException

Description copied from interface: Handler

Handle a URL request that has been mapped to this Handler

Specified by:

handle in interface Handler

Parameters:

request - The HTTP request data

response - Where we write the HTTP response data

Throws:

java.io.IOException - If the write process fails

generateCachableContent

public abstract java.lang.String generateCachableContent(java.lang.String contextPath,
                                                         java.lang.String servletPath,
                                                         java.lang.String pathInfo)
                                                  throws java.io.IOException

Create a String which can be cached and sent as a 302. Returning null signals that the resource doesn't exist and should result in a 404.

Parameters:

contextPath -

servletPath -

pathInfo -

Returns:

The string to output for this resource

Throws:

java.io.IOException

setIgnoreLastModified

public void setIgnoreLastModified(boolean ignoreLastModified)

Parameters:

ignoreLastModified - The ignoreLastModified to set.

setMimeType

public void setMimeType(java.lang.String mimeType)

The mime type to send the output under

Parameters:

mimeType - the mimeType to set

getMimeType

public java.lang.String getMimeType()

Returns:

the current mime type