Greetings,
My app should have a resource that monitoring service is pinging to see whether the app is alive or not.
ping.java:
@Name("ping")
public class Ping {
@In
EntityManager entityManager;
@Logger
private Log log;
public String ping() {
try {
entityManager.createQuery("from Widget where id = -1").getResultList();
return "ok";
} catch (Throwable ex) {
log.error("Ping was not successful", ex);
return "error";
}
}
}
pages.xml:
<page view-id="/system/ping.xhtml" login-required="false" action="#{ping.ping}">
<navigation from-action="#{ping.ping}">
<rule if-outcome="ok">
<render view-id="/system/ping_ok.xhtml"/>
</rule>
<rule if-outcome="error">
<render view-id="/system/ping_error.xhtml"/>
</rule>
</navigation>
</page>
When the database is actually down then the execution never even makes it to ping() method:
ERROR 2008-05-14 14:03:20,177 org.jboss.seam.jsf.SeamPhaseListener - uncaught exception
java.lang.IllegalStateException: Could not start transaction
at org.jboss.seam.jsf.SeamPhaseListener.begin(SeamPhaseListener.java:581)
at org.jboss.seam.jsf.SeamPhaseListener.handleTransactionsBeforePhase(SeamPhaseListener.java:312)
at org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:140)
at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:114)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:222)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
I guess my configuration is a bit off as I don't see why there is a need to start a transaction there.
Any tips?
Thank you.
