atg.repository.seo
Class JumpServlet

java.lang.Object
  atg.nucleus.logging.VariableArgumentApplicationLoggingImpl
      atg.nucleus.GenericService
          atg.nucleus.TimedOperationService
              atg.servlet.pipeline.PipelineableServletImpl
                  atg.servlet.pipeline.InsertableServletImpl
                      atg.repository.seo.JumpServlet

All Implemented Interfaces:

atg.naming.AbsoluteNameable, NameContextBindingListener, NameContextElement, atg.naming.NameContextParentable, NameResolver, AdminableService, atg.nucleus.Configured, ApplicationLogging, atg.nucleus.logging.ApplicationLoggingSender, atg.nucleus.logging.TraceApplicationLogging, VariableArgumentApplicationLogging, ComponentNameResolver, Service, ServiceListener, InsertableServlet, PipelineableServlet, java.util.EventListener, javax.servlet.Servlet

public class JumpServlet
extends InsertableServletImpl

The JumpServlet class supports search engine optimization (SEO).

The ItemLink droplet in the same package as this generates dynamic URLs for normal users and static URLs for search spiders. The purpose of the JumpServlet is to handle HTTP requests which have these static URLs as their request URI, since these do not correspond to actual page content.

This servlet class will perform the following steps:

1. It will match the static URL against a predefined set of URL patterns and formats.
2. It will then extract parameters that have been embedded as path elements in the static URL.
3. The extracted parameter are then inserted as query parameters of a destination URL.
4. It then forwards or redirects the request onto the destination URL.

In the case of search spiders, a forward will always be used since it is undesirable for them to work with dynamic URLs. Redirects usually take place for normal visitors that have clicked on a static URL in a search results page.

Field Summary

static java.lang.String

CLASS_VERSION Class version string

Fields inherited from class atg.nucleus.GenericService

SERVICE_INFO_KEY

Fields inherited from interface atg.nucleus.logging.TraceApplicationLogging

DEFAULT_LOG_TRACE_STATUS

Fields inherited from interface atg.nucleus.logging.ApplicationLogging

DEFAULT_LOG_DEBUG_STATUS, DEFAULT_LOG_ERROR_STATUS, DEFAULT_LOG_INFO_STATUS, DEFAULT_LOG_WARNING_STATUS

Constructor Summary

JumpServlet()


Method Summary

void	doStartService() Initialises the jump servlet.
Repository	getDefaultRepository()
WebApp	getDefaultWebApp()
IndirectUrlTemplate[]	getTemplates()
boolean	isPrependContextPathForRedirect() Returns property prependContextPathForRedirect
void	service(DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) Main service method of this servlet.
void	setDefaultRepository(Repository pDefaultRepository)
void	setDefaultWebApp(WebApp pDefaultWebApp)
void	setPrependContextPathForRedirect(boolean pPrependContextPathForRedirect) Sets the prependContextPathForRedirect property
void	setTemplates(IndirectUrlTemplate[] pTemplates)

Methods inherited from class atg.servlet.pipeline.InsertableServletImpl

getInsertAfterServlet, setInsertAfterServlet

Methods inherited from class atg.servlet.pipeline.PipelineableServletImpl

createAdminServlet, destroy, getAdminServlet, getNextServlet, getServletConfig, getServletInfo, init, isUsePathInfo, passRequest, passRequest, service, service, setNextServlet, setServletInfo, setUsePathInfo

Methods inherited from class atg.nucleus.TimedOperationService

getAverageRequestHandlingTime, getHandledRequestCount, getRequestStartTime, getTotalRequestHandlingTime, isKeepingStatistics, notifyHandledRequest, resetStatistics, setKeepingStatistics

Methods inherited from class atg.nucleus.GenericService

addLogListener, doStopService, getAbsoluteName, getAdminServletOutputStreamEncoding, getLoggingForVlogging, getLogListenerCount, getLogListeners, getName, getNameContext, getNucleus, getRoot, getServiceConfiguration, getServiceInfo, isAdminServletUseServletOutputStream, isLoggingDebug, isLoggingError, isLoggingInfo, isLoggingTrace, isLoggingWarning, isRunning, logDebug, logDebug, logDebug, logError, logError, logError, logInfo, logInfo, logInfo, logTrace, logTrace, logTrace, logWarning, logWarning, logWarning, nameContextElementBound, nameContextElementUnbound, removeLogListener, reResolveThis, resolveName, resolveName, resolveName, resolveName, sendLogEvent, setAdminServletOutputStreamEncoding, setAdminServletUseServletOutputStream, setLoggingDebug, setLoggingError, setLoggingInfo, setLoggingTrace, setLoggingWarning, setNucleus, setServiceInfo, startService, stopService

Methods inherited from class atg.nucleus.logging.VariableArgumentApplicationLoggingImpl

vlogDebug, vlogDebug, vlogDebug, vlogDebug, vlogDebugTrace, vlogError, vlogError, vlogError, vlogError, vlogInfo, vlogInfo, vlogInfo, vlogInfo, vlogTrace, vlogTrace, vlogTrace, vlogTrace, vlogWarning, vlogWarning, vlogWarning, vlogWarning

Methods inherited from class java.lang.Object

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

Methods inherited from interface atg.servlet.pipeline.PipelineableServlet

getNextServlet, passRequest, setNextServlet

Methods inherited from interface javax.servlet.Servlet

destroy, getServletConfig, getServletInfo, init, service

Field Detail

CLASS_VERSION

public static java.lang.String CLASS_VERSION

Class version string

Constructor Detail

JumpServlet

public JumpServlet()

Method Detail

getTemplates

public IndirectUrlTemplate[] getTemplates()

Returns:

An array of IndirectUrlTemplate instances.

setTemplates

public void setTemplates(IndirectUrlTemplate[] pTemplates)

Parameters:

pTemplates - The array of IndirectUrlTemplate instances to set.

getDefaultRepository

public Repository getDefaultRepository()

Returns:

The default repository.

setDefaultRepository

public void setDefaultRepository(Repository pDefaultRepository)

Parameters:

pDefaultRepository - The default repository to set.

getDefaultWebApp

public WebApp getDefaultWebApp()

Returns:

The default WebApp that is configured for this jump servlet instance.

setDefaultWebApp

public void setDefaultWebApp(WebApp pDefaultWebApp)

Parameters:

pDefaultWebApp - The default WebApp to set.

isPrependContextPathForRedirect

public boolean isPrependContextPathForRedirect()

Returns property prependContextPathForRedirect

Returns:

prependContextPathForRedirect property

setPrependContextPathForRedirect

public void setPrependContextPathForRedirect(boolean pPrependContextPathForRedirect)

Sets the prependContextPathForRedirect property

Parameters:

pPrependContextPathForRedirect - The property value to set

doStartService

public void doStartService()
                    throws ServiceException

Initialises the jump servlet.

Overrides:

doStartService in class InsertableServletImpl

Throws:

ServiceException

See Also:

GenericService.doStartService()

service

public void service(DynamoHttpServletRequest pRequest,
                    DynamoHttpServletResponse pResponse)
             throws javax.servlet.ServletException,
                    java.io.IOException

Main service method of this servlet.

This will match the request URI against a known IndirectUrlTemplate using its templates property

When a match is made, it extracts the parameters from the URL and generates a destination URL using these parameters as query parameters. It then either forwards or redirects the visitor to the destination URL.

Overrides:

service in class PipelineableServletImpl

Parameters:

pRequest - The HTTP request

pResponse - The HTTP response

Throws:

javax.servlet.ServletException - Indicates an error

java.io.IOException - Indicates an error