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Posted to users@tapestry.apache.org by Matías Blasi <ma...@gmail.com> on 2012/09/23 15:58:16 UTC
Advisin Tapestry Session
Hi all,
I'm trying to implement a mechanism to track each user session, at least
the login and logout events.
The login is easy, because it occurs in a defined place, but the logout can
occurs explicitly or because of a timeout, so I thought in advising the
Tapestry Session.invalidate() method:
@SuppressWarnings("unchecked")
@Advise(serviceInterface=org.apache.tapestry5.services.Session.class)
public static void adviseUserActivity(final UserService userService,
final MethodAdviceReceiver receiver)
throws SecurityException, NoSuchMethodException {
MethodAdvice advise = new MethodAdvice() {
@Override
public void advise(MethodInvocation invocation) {
userService.endSession(userService.getCurrentUser().getUserName());
}
};
receiver.adviseMethod(receiver.getInterface().getMethod("invalidate"),
advise);
}
But oddly, I'm getting the following error when starting up the application:
Caused by: java.lang.RuntimeException: Error invoking method public static
void
com.app.services.AppModule.adviseUserActivity(com.app.core.services.UserService,org.apache.tapestry5.ioc.MethodAdviceReceiver)
throws java.lang.SecurityException,java.lang.NoSuchMethodException:
org.hibernate.Session.invalidate()
at
org.apache.tapestry5.ioc.internal.util.MethodInvoker.invoke(MethodInvoker.java:61)
at
org.apache.tapestry5.ioc.internal.util.LoggingInvokableWrapper.invoke(LoggingInvokableWrapper.java:42)
at
org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:74)
... 79 more
Caused by: java.lang.NoSuchMethodException:
org.hibernate.Session.invalidate()
at java.lang.Class.getMethod(Class.java:1622)
at com.app.services.AppModule.adviseUserActivity(AppModule.java:198)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at
org.apache.tapestry5.ioc.internal.util.MethodInvoker.invoke(MethodInvoker.java:50)
... 81 more
2012-09-23 10:50:11.134::INFO: Started SelectChannelConnector@0.0.0.0:8080
[INFO] Started Jetty Server
Why is it trying to advise the org.hibernate.Sesssion.invalidate() method
if I explicitly
annotated: @Advise(serviceInterface=org.apache.tapestry5.services.Session.class),
is it a bug?
Anyway, do you think this is the best way of doing this, or is there any
other better mechanism to intercept a finished session?
Best regards,
Matias.
Re: Advisin Tapestry Session
Posted by Lance Java <la...@googlemail.com>.
Whilst the Request is a (thread-local) tapestry service, the session is not.
It seems that you are trying to advise the (non-existant) http-session
service and tapestry is getting confused and trying to advise the
hibernate-session which does exist. Since hibernate does not have an
invalidate() a NoSuchMethodException is being thrown.
I can only assume that tapestry is using the service id ("session") instead
of the interface (org.apache.tapestry5.services.Session) to lookup the
object to advise.
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Re: Advisin Tapestry Session
Posted by Matías Blasi <ma...@gmail.com>.
Thank both of you!
I'll analyze these options.
Anyway, I am curious about why my approach is not working, I insist, is it
a bug?
Best regards,
Matias.
On Sun, Sep 23, 2012 at 10:58 AM, Matías Blasi <ma...@gmail.com>wrote:
> Hi all,
>
> I'm trying to implement a mechanism to track each user session, at least
> the login and logout events.
> The login is easy, because it occurs in a defined place, but the logout
> can occurs explicitly or because of a timeout, so I thought in advising the
> Tapestry Session.invalidate() method:
>
> @SuppressWarnings("unchecked")
> @Advise(serviceInterface=org.apache.tapestry5.services.Session.class)
> public static void adviseUserActivity(final UserService userService,
> final MethodAdviceReceiver receiver)
> throws SecurityException, NoSuchMethodException {
> MethodAdvice advise = new MethodAdvice() {
> @Override
> public void advise(MethodInvocation invocation) {
> userService.endSession(userService.getCurrentUser().getUserName());
> }
> };
>
>
> receiver.adviseMethod(receiver.getInterface().getMethod("invalidate"),
> advise);
> }
>
> But oddly, I'm getting the following error when starting up the
> application:
>
> Caused by: java.lang.RuntimeException: Error invoking method public static
> void
> com.app.services.AppModule.adviseUserActivity(com.app.core.services.UserService,org.apache.tapestry5.ioc.MethodAdviceReceiver)
> throws java.lang.SecurityException,java.lang.NoSuchMethodException:
> org.hibernate.Session.invalidate()
> at
> org.apache.tapestry5.ioc.internal.util.MethodInvoker.invoke(MethodInvoker.java:61)
> at
> org.apache.tapestry5.ioc.internal.util.LoggingInvokableWrapper.invoke(LoggingInvokableWrapper.java:42)
> at
> org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:74)
> ... 79 more
> Caused by: java.lang.NoSuchMethodException:
> org.hibernate.Session.invalidate()
> at java.lang.Class.getMethod(Class.java:1622)
> at
> com.app.services.AppModule.adviseUserActivity(AppModule.java:198)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:616)
> at
> org.apache.tapestry5.ioc.internal.util.MethodInvoker.invoke(MethodInvoker.java:50)
> ... 81 more
> 2012-09-23 10:50:11.134::INFO: Started
> SelectChannelConnector@0.0.0.0:8080
> [INFO] Started Jetty Server
>
> Why is it trying to advise the org.hibernate.Sesssion.invalidate() method
> if I explicitly
> annotated: @Advise(serviceInterface=org.apache.tapestry5.services.Session.class),
> is it a bug?
>
> Anyway, do you think this is the best way of doing this, or is there any
> other better mechanism to intercept a finished session?
>
> Best regards,
> Matias.
>
Re: Advisin Tapestry Session
Posted by Lance Java <la...@googlemail.com>.
As bobharner said, there is a non-tapestry way of doing this with a
HttpSessionListener (although I would synchronize his solution to make it
thread-safe).
Another option is to override / decorate the TapestrySessionFactory [1] to
return a Session instance with the hooks that you want.
[1]
http://tapestry.apache.org/5.3.5/apidocs/org/apache/tapestry5/internal/services/TapestrySessionFactory.html
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Re: Advisin Tapestry Session
Posted by Bob Harner <bo...@gmail.com>.
I can't answer your specific question, but as an alternative approach
(and not tied to Tapestry) you could implement an HttpSessionListener,
like this (and configure it in your web.xml):
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
import org.apache.log4j.Logger;
public class SessionListener implements HttpSessionListener
{
private static final Logger logger =
Logger.getLogger(SessionListener.class);
private static int currentSessions = 0;
private static int totalSessions = 0;
public void sessionCreated(HttpSessionEvent httpSessionEvent) {
currentSessions++;
totalSessions++;
logger.info("Session created: current sessions = " +
currentSessions + "; sessions since app started = " + totalSessions);
}
public void sessionDestroyed(HttpSessionEvent httpSessionEvent) {
currentSessions--;
logger.info("Session destroyed: current sessions = " +
currentSessions + "; sessions since app started = " + totalSessions);
}
}
Your sessionDestroyed() method is called just *before* the session is
invalidated (e.g. from a timeout).
On Sun, Sep 23, 2012 at 9:58 AM, Matías Blasi <ma...@gmail.com> wrote:
> Hi all,
>
> I'm trying to implement a mechanism to track each user session, at least
> the login and logout events.
> The login is easy, because it occurs in a defined place, but the logout can
> occurs explicitly or because of a timeout, so I thought in advising the
> Tapestry Session.invalidate() method:
>
> @SuppressWarnings("unchecked")
> @Advise(serviceInterface=org.apache.tapestry5.services.Session.class)
> public static void adviseUserActivity(final UserService userService,
> final MethodAdviceReceiver receiver)
> throws SecurityException, NoSuchMethodException {
> MethodAdvice advise = new MethodAdvice() {
> @Override
> public void advise(MethodInvocation invocation) {
> userService.endSession(userService.getCurrentUser().getUserName());
> }
> };
>
>
> receiver.adviseMethod(receiver.getInterface().getMethod("invalidate"),
> advise);
> }
>
> But oddly, I'm getting the following error when starting up the application:
>
> Caused by: java.lang.RuntimeException: Error invoking method public static
> void
> com.app.services.AppModule.adviseUserActivity(com.app.core.services.UserService,org.apache.tapestry5.ioc.MethodAdviceReceiver)
> throws java.lang.SecurityException,java.lang.NoSuchMethodException:
> org.hibernate.Session.invalidate()
> at
> org.apache.tapestry5.ioc.internal.util.MethodInvoker.invoke(MethodInvoker.java:61)
> at
> org.apache.tapestry5.ioc.internal.util.LoggingInvokableWrapper.invoke(LoggingInvokableWrapper.java:42)
> at
> org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:74)
> ... 79 more
> Caused by: java.lang.NoSuchMethodException:
> org.hibernate.Session.invalidate()
> at java.lang.Class.getMethod(Class.java:1622)
> at com.app.services.AppModule.adviseUserActivity(AppModule.java:198)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:616)
> at
> org.apache.tapestry5.ioc.internal.util.MethodInvoker.invoke(MethodInvoker.java:50)
> ... 81 more
> 2012-09-23 10:50:11.134::INFO: Started SelectChannelConnector@0.0.0.0:8080
> [INFO] Started Jetty Server
>
> Why is it trying to advise the org.hibernate.Sesssion.invalidate() method
> if I explicitly
> annotated: @Advise(serviceInterface=org.apache.tapestry5.services.Session.class),
> is it a bug?
>
> Anyway, do you think this is the best way of doing this, or is there any
> other better mechanism to intercept a finished session?
>
> Best regards,
> Matias.
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