org.apache.lucene.gdata.servlet.handler
Class DefaultGetHandler

java.lang.Object
  org.apache.lucene.gdata.servlet.handler.RequestAuthenticator
      org.apache.lucene.gdata.servlet.handler.AbstractGdataRequestHandler
          org.apache.lucene.gdata.servlet.handler.DefaultGetHandler

All Implemented Interfaces:

GDataHttpAuthenticator, GDataRequestHandler

public class DefaultGetHandler
extends AbstractGdataRequestHandler

Default Handler implementation. This handler processes the incoming GDataRequest and retrieves the requested feed from the underlying storage.

This hander also processes search queries and retrieves the search hits from the underlying search component. The user query will be accessed via the GDataRequest instance passed to the Service class.

The DefaultGetHandler supports HTTP Conditional GET. It set the Last-Modified response header based upon the value of the element in the returned feed or entry. A client can send this value back as the value of the If-Modified-Since request header to avoid retrieving the content again if it hasn't changed. If the content hasn't changed since the If-Modified-Since time, then the GData service returns a 304 (Not Modified) HTTP response.

Author:

Simon Willnauer

Field Summary

Fields inherited from class org.apache.lucene.gdata.servlet.handler.AbstractGdataRequestHandler

feedRequest, feedResponse, service

Constructor Summary

DefaultGetHandler()

Method Summary

protected boolean	checkIsModified(String lastModified) returns true if the resource has been modified since the specified request header value
void	processRequest(HttpServletRequest request, HttpServletResponse response) Processes the GDATA Client request

Methods inherited from class org.apache.lucene.gdata.servlet.handler.AbstractGdataRequestHandler

closeService, initializeRequestHandler, sendError, setError, setFeedResponseFormat, setFeedResponseStatus

Methods inherited from class org.apache.lucene.gdata.servlet.handler.RequestAuthenticator

authenticateAccount, getTokenFromRequest

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultGetHandler

public DefaultGetHandler()

Method Detail

processRequest

public void processRequest(HttpServletRequest request,
                           HttpServletResponse response)
                    throws IOException,
                           ServletException

Description copied from interface: GDataRequestHandler

Processes the GDATA Client request

Specified by:

processRequest in interface GDataRequestHandler

Specified by:

processRequest in class AbstractGdataRequestHandler

Parameters:

request - - the client request to be processed

response - - the response to the client request

Throws:

IOException - - if an input/output error occurs due to accessing an IO steam

ServletException - - if a servlet exception is thrown by the request or response

See Also:

org.apache.lucene.gdata.servlet.handler.AbstractGdataRequestHandler#processRequest(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)

checkIsModified

protected boolean checkIsModified(String lastModified)
                           throws ServiceException

returns true if the resource has been modified since the specified request header value

Throws:

ServiceException