I've made a class, extending the DefaultPageManagerProvider to avoid Wicket
page store (in order recreate every page at every request from users)
I'm testing it, and found no problems - for now.
Take a look; I'm thinking about sending it to JIRA as an improvement
/**
* User: obesga
* Date: 16-jan-2013
* Page manager that does not store any page, nor any bit
*/
public class VoidPageManagerProvider extends DefaultPageManagerProvider {
// Common properties
private IPageManagerContext iPageManagerContext;
private IPageManager iPageManager;
private IDataStore iDataStore;
private IPageStore iPageStore;
/**
* Basic construftor
* @param application Actual application
*/
public VoidPageManagerProvider(Application application) {
super(application);
iPageManagerContext = new DefaultPageManagerContext();
iDataStore = new VoidIDataStore();
iPageStore = new VoidIPageStore();
iPageManager = new
VoidPageStoreManager(application.getName(),iPageStore,iPageManagerContext);
}
@Override
public IPageManager get(IPageManagerContext pageManagerContext) {
return iPageManager;
}
@Override
protected IPageStore newPageStore(IDataStore dataStore) {
return iPageStore;
}
@Override
protected IDataStore newDataStore() {
return iDataStore;
}
/**
* A data store that doesn't store a byte
*/
private class VoidIDataStore implements IDataStore {
public byte[] getData(String s, int i) {
return null;
}
public void removeData(String s, int i) {
}
public void removeData(String s) {
}
public void storeData(String s, int i, byte[] bytes) {
}
public void destroy() {
}
public boolean isReplicated() {
return true;
}
public boolean canBeAsynchronous() {
return true;
}
}
/**
* A page store that doesn't store a page
*/
private class VoidIPageStore implements IPageStore {
public void destroy() {
}
public IManageablePage getPage(String s, int i) {
return null;
}
public void removePage(String s, int i) {
}
public void storePage(String s, IManageablePage iManageablePage) {
}
public void unbind(String s) {
}
public Serializable prepareForSerialization(String s, Object o) {
return null;
}
public Object restoreAfterSerialization(Serializable serializable) {
return null;
}
public IManageablePage convertToPage(Object o) {
return null;
}
}
/**
* The basic store manager, extended to not support versioning
*/
private class VoidPageStoreManager extends PageStoreManager implements
IPageManager {
public VoidPageStoreManager(String applicationName, IPageStore
pageStore, IPageManagerContext context) {
super(applicationName, pageStore, context);
}
@Override
public boolean supportsVersioning() {
return false;
}
}
}
> > > Oscar Besga Arcauz < < <
-----Martin Grigorov <[email protected]> escribió: -----
Para: [email protected]
De: Martin Grigorov <[email protected]>
Fecha: 16/01/2013 09:00
Asunto: Re: Do not cache pages, nor in application, nor in browser
Hi,
On Tue, Jan 15, 2013 at 7:59 PM, Oscar Besga Arcauz <[email protected]>wrote:
>
>
> I use these code in order to avoid web page cache, in browser and in
> wicket application;
> also I want to avoid disk caching and serialization
>
> I'm using Wicket6
>
>
> ¿ Do you see this code correct ? ¿ Is there any easier way to accomplish
> this ?
>
> /**
> * App
> */
> public class MyApplication extends WebApplication {
> @Override
> public void init() {
> super.init();
> setPageManagerProvider(new MyPageManagerProvider(this));
> }
>
> /**
> * shall not save
> */
> private class MyPageManagerProvider extends DefaultPageManagerProvider
> {
>
> private MyPageManagerProvider(Application application) {
> super(application);
> }
>
>
> @Override
> protected IDataStore newDataStore() {
> // guardamos tod o en memoria
> return new HttpSessionDataStore(new
> DefaultPageManagerContext(), new PageNumberEvictionStrategy(0));
>
You can use getStoreSettings#setMaxSizePerSession(Bytes.bytes(1)) with the
default DiskDataStore too.
But your approach is better because this way you don't do IO operations.
> }
>
> }
>
> }
>
>
>
> /******************************************************************************************/
>
> /**
> * Web Page
> */
> public class MyPage extends WebPage {
>
> @Override
> protected void setHeaders(WebResponse response) {
> super.setHeaders(response);
> response.setHeader("X-Frame-Options","deny"); // Avoid IFRFAMES
> response.setHeader("Cache-Control",
> "no-cache,no-store,private,must-revalidate,max-stale=0,post-check=0,pre-check=0");
> response.setHeader("Expires","0");
> response.setHeader("Pragma", "no-cache");
> response.disableCaching();
>
You probably want to call #disableCaching() *before* your setHeader()
calls. Currently #disableCaching() overrides some of them.
> }
>
> }
>
>
>
>
> > > > Oscar Besga Arcauz < < <
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>
--
Martin Grigorov
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