There is no standard facility for this. One way is to do this
independent of Wicket by configuring a session listener:
http://java.sun.com/products/servlet/2.3/javadoc/javax/servlet/http/HttpSessionListener.html
A Wicket specific way for this would be to use a custom session store.
This is an example:
/**
* Session store that keeps attributes in memory instead of putting them in the
* [EMAIL PROTECTED] HttpSession}.
*
* @author hillenius
*/
public final class Ts4SessionStore extends AbstractHttpSessionStore
implements Serializable {
private static final class ANONYMOUS extends User {
public ANONYMOUS() {
setUsername("[ANONYMOUS]");
}
}
/** Log. */
private static final Log log = LogFactory.getLog(Ts4SessionStore.class);
/** Hibernate session factory. */
@SpringBean
private SessionFactory sessionFactory;
/**
* Map of session ids to store objects.
*/
private final HashMap<String, Map<String, Serializable>>
sessionIdToStore = new HashMap<String, Map<String, Serializable>>();
/**
* Construct.
*/
public Ts4SessionStore() {
}
/**
* @see wicket.session.ISessionStore#createPageMap(java.lang.String,
* wicket.Session)
*/
public IPageMap createPageMap(String name, Session session) {
return new AccessStackPageMap(name, session);
}
/**
* @see ISessionStore#getAttribute(Request, String)
*/
public Object getAttribute(Request request, String name) {
Map<String, Serializable> store = getStore(request);
return store.get(name);
}
/**
* @see ISessionStore#getAttributeNames(Request)
*/
public List<String> getAttributeNames(Request request) {
Map<String, Serializable> store = getStore(request);
return new ArrayList<String>(store.keySet());
}
/**
* @return The number of sessions.
*/
public int getNumberOfSessions() {
return sessionIdToStore.size();
}
/**
* Gets the internal store (for integration purposes).
*
* @return The internal store
*/
public Map<String, Map<String, Serializable>> getSessionIdToStore() {
return sessionIdToStore;
}
/**
* @see
wicket.protocol.http.AbstractHttpSessionStore#lookup(wicket.Request)
*/
@Override
public Session lookup(Request request) {
Map<String, Serializable> store = getStoreUnsafe(request);
if (store != null) {
return (Session)
store.get(Session.SESSION_ATTRIBUTE_NAME);
}
return null;
}
/**
* @see ISessionStore#removeAttribute(Request, String)
*/
public void removeAttribute(Request request, String name) {
Map<String, Serializable> store = getStore(request);
store.remove(name);
}
@SuppressWarnings("unchecked")
public Iterator<Ts4Session> sessions() {
final Iterator<Map<String, Serializable>> outer =
((HashMap<String,
Map<String, Serializable>>) sessionIdToStore
.clone()).values().iterator();
return new Iterator<Ts4Session>() {
public boolean hasNext() {
return outer.hasNext();
}
public Ts4Session next() {
Map<String, Serializable> store = outer.next();
return (Ts4Session)
store.get(Session.SESSION_ATTRIBUTE_NAME);
}
public void remove() {
outer.remove();
}
};
}
/**
* @see ISessionStore#setAttribute(Request, String, Object)
*/
public void setAttribute(Request request, String name, Object value) {
Map<String, Serializable> store = getStore(request);
store.put(name, (Serializable) value);
}
/**
* Gets all users for the current sessions; ANONYMOUS for every user
that is
* not logged on. Use with JMX.
*
* @return List of current users
*/
public String users() {
if (sessionFactory == null) {
SpringInjector.injectDependencies(this);
}
StringBuilder b = new StringBuilder();
if (!sessionIdToStore.isEmpty()) {
org.hibernate.Session hibernateSession = null;
try {
hibernateSession = sessionFactory.openSession();
for (Iterator<String> i =
sessionIdToStore.keySet().iterator();
i.hasNext();) {
String sid = i.next();
Map<String, Serializable> store =
sessionIdToStore.get(sid);
Ts4Session session = (Ts4Session)
store.get(Session.SESSION_ATTRIBUTE_NAME);
Long userId = session.getUserId();
if (userId != null) {
User user = (User)
hibernateSession.load(User.class, userId);
b.append(user.getUsername());
b.append(": ");
b.append(user.getFirstName());
b.append(" ");
b.append(user.getLastName());
} else {
b.append("ANONYMOUS");
}
b.append(", session ");
b.append(sid);
if (i.hasNext()) {
b.append("\n");
}
}
} catch (Exception e) {
e.printStackTrace();
b.delete(0, b.length());
b.append("unable to make a list of currently
logged in users:");
for (StackTraceElement el : e.getStackTrace()) {
b.append("\n\t");
b.append(el.toString());
}
} finally {
if (hibernateSession != null) {
hibernateSession.close();
}
}
}
return b.toString();
}
/**
* Gets the store for the session of the provided request, returning
null
* and log a warning when the store was not found.
*
* @param request
*
* @return The store
*/
private final Map<String, Serializable> getStore(Request request) {
String sessionId = getSessionId(request, true);
Map<String, Serializable> store =
sessionIdToStore.get(sessionId);
if (store == null) {
log.warn("no store found for session with id " +
sessionId + "
(request=" + request + ")");
// return a dummy
return new HashMap<String, Serializable>();
}
return store;
}
/**
* Gets the store for the session of the provided request, returning
null
* when the store was not found.
*
* @param request
*
* @return The store
*/
private final Map<String, Serializable> getStoreUnsafe(Request request)
{
String sessionId = getSessionId(request, true);
return sessionIdToStore.get(sessionId);
}
/**
* @see AbstractHttpSessionStore#onBind(Request, Session)
*/
@Override
protected void onBind(Request request, Session newSession) {
String sessionId = getSessionId(request, true);
sessionIdToStore.put(sessionId, new HashMap<String,
Serializable>());
log.info("new session " + sessionId + " bound to session
store");
}
/**
* @see AbstractHttpSessionStore#onUnbind(String)
*/
@Override
protected void onUnbind(String sessionId) {
Map<String, Serializable> store =
sessionIdToStore.remove(sessionId);
log.info("session " + sessionId + " unbound from session store;
cleaning up " + store.size() + " entries");
}
}
Hope that helps,
Eelco
On 2/6/07, Peter Neubauer <[EMAIL PROTECTED]> wrote:
> Hi there,
> how do I get the logged in users as a list or something from the API
> in Wicket 2.0 SNAPSHOT?
>
>
> Thanks for any hints
>
> /peter
>
> -------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job easier.
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
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> _______________________________________________
> Wicket-user mailing list
> Wicket-user@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/wicket-user
>
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier.
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
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