org.wamblee.wicket.transactions
Class OpenTransactionInViewRequestCycle

java.lang.Object
  org.apache.wicket.RequestCycle
      org.apache.wicket.protocol.http.WebRequestCycle
          org.wamblee.wicket.transactions.OpenTransactionInViewRequestCycle

public class OpenTransactionInViewRequestCycle
extends org.apache.wicket.protocol.http.WebRequestCycle

This class provides an Open Transaction in View implementation for wicket. It provides a custom request cycle that uses the UserTransaction to make sure that all work is done within a single transaction. In Hibernate context, this is referred to as open session in view.

The method used by this class is more correctly called Open Transaction in View and has a similar effect to open session in view. It is however more general because it supports any (JTA) transactional resource. Also it is more efficient/scalable than most open session in view implementations because a database connection is only obtained from the connection pool when it is needed.

To use this request cycle, add it in your wicket Application subclass by overriding Application.newRequestCycle(org.apache.wicket.Request, Response). For example:

 @Override
 public RequestCycle newRequestCycle(Request aRequest, Response aResponse) {
     return new OpenTransactionInViewRequestCycle(this, (WebRequest) aRequest,
         aResponse);
 }
 

Author:

Erik Brakkee

Field Summary

Fields inherited from class org.apache.wicket.RequestCycle

application, processor, request, response

Constructor Summary

OpenTransactionInViewRequestCycle(org.apache.wicket.protocol.http.WebApplication aApplication, org.apache.wicket.protocol.http.WebRequest aRequest, org.apache.wicket.Response aResponse)
Constructs the request cycle.

Method Summary

protected void	onBeginRequest()
protected void	onEndRequest()
org.apache.wicket.Page	onRuntimeException(org.apache.wicket.Page aPage, RuntimeException aE)

Methods inherited from class org.apache.wicket.protocol.http.WebRequestCycle

getProcessor, getWebRequest, getWebResponse, getWebSession, isRedirect, newBrowserInfoPage, newClientInfo, redirectTo

Methods inherited from class org.apache.wicket.RequestCycle

detach, get, getApplication, getClientInfo, getMetaData, getOriginalResponse, getPageParameters, getRedirect, getRequest, getRequestTarget, getResponse, getResponsePage, getResponsePageClass, getSession, getStartTime, isUrlForNewWindowEncoding, logRuntimeException, onAfterTargetsDetached, onRequestTargetSet, request, request, request, set, setAutomaticallyClearFeedbackMessages, setMetaData, setRedirect, setRequest, setRequestTarget, setResponse, setResponsePage, setResponsePage, setResponsePage, setResponsePage, setUrlForNewWindowEncoding, toString, urlFor, urlFor, urlFor, urlFor, urlFor, urlFor, urlFor, urlFor, urlFor, urlFor, wasHandled

Methods inherited from class java.lang.Object

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

Constructor Detail

OpenTransactionInViewRequestCycle

public OpenTransactionInViewRequestCycle(org.apache.wicket.protocol.http.WebApplication aApplication,
                                         org.apache.wicket.protocol.http.WebRequest aRequest,
                                         org.apache.wicket.Response aResponse)

Constructs the request cycle.

Parameters:

aApplication - Application to use.

aRequest - Request

aResponse - Response.

Method Detail

onBeginRequest

protected void onBeginRequest()

Overrides:

onBeginRequest in class org.apache.wicket.RequestCycle

onEndRequest

protected void onEndRequest()

Overrides:

onEndRequest in class org.apache.wicket.RequestCycle

onRuntimeException

public org.apache.wicket.Page onRuntimeException(org.apache.wicket.Page aPage,
                                                 RuntimeException aE)

Overrides:

onRuntimeException in class org.apache.wicket.RequestCycle