3:52 p.m.
Swaminathan Bhaskar [http://community.jboss.org/people/swaminathan.bhaskar] created the
discussion
"JBoss Cache 3.x Eviction notification"
To view the discussion, visit: http://community.jboss.org/message/605363#605363
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I looked at the CacheListener and did not find any way for me to get notified when an
object stored under a FQN is evicted due to expiry etc. Is there any other way I could
register a callback to be notified when a key is evicted ? Any help appreciated
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11:54 a.m.
New subject: [JBoss Cache] - Re: JBoss Cache 3.x Eviction notification
Swaminathan Bhaskar [http://community.jboss.org/people/swaminathan.bhaskar] created the
discussion
"Re: JBoss Cache 3.x Eviction notification"
To view the discussion, visit: http://community.jboss.org/message/605502#605502
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Any pointers on how to achieve this would be of great help. Can someone please help ?
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8:27 a.m.
New subject: [JBoss Cache] - Re: JBoss Cache 3.x Eviction notification
jaysmith [http://community.jboss.org/people/jaysmith] created the discussion
"Re: JBoss Cache 3.x Eviction notification"
To view the discussion, visit: http://community.jboss.org/message/606049#606049
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Hi,
you sure the CacheListener didn't work? I have this code for a listener and it works
pretty well if memory serves me correctly.
*****import java.text.SimpleDateFormat;
import java.util.Date;
import org.jboss.cache.notifications.annotation.CacheListener;
import org.jboss.cache.notifications.annotation.CacheStarted;
import org.jboss.cache.notifications.annotation.NodeActivated;
import org.jboss.cache.notifications.annotation.NodeCreated;
import org.jboss.cache.notifications.annotation.NodeEvicted;
import org.jboss.cache.notifications.annotation.NodeLoaded;
import org.jboss.cache.notifications.annotation.NodePassivated;
import org.jboss.cache.notifications.annotation.NodeRemoved;
import org.jboss.cache.notifications.annotation.NodeVisited;
import org.jboss.cache.notifications.event.CacheStartedEvent;
import org.jboss.cache.notifications.event.NodeActivatedEvent;
import org.jboss.cache.notifications.event.NodeCreatedEvent;
import org.jboss.cache.notifications.event.NodeEvictedEvent;
import org.jboss.cache.notifications.event.NodeLoadedEvent;
import org.jboss.cache.notifications.event.NodePassivatedEvent;
import org.jboss.cache.notifications.event.NodeRemovedEvent;
import org.jboss.cache.notifications.event.NodeVisitedEvent;
@CacheListener
public class CustomCacheListener {
@CacheStarted
public final void cacheStarted(final CacheStartedEvent e) {
System.out.println(format(new Date()) + " [CustomCacheListener] Cache
started");
}
private String format(Date date) {
SimpleDateFormat formatter = new SimpleDateFormat("HH:MM:ss.SSS");
return formatter.format(date);
}
@NodeActivated
public final void nodeActivated(final NodeActivatedEvent ne) {
System.out.println(format(new Date()) + " [CustomCacheListener] Activated
key: " + ne.getFqn().toString());
}
@NodeCreated
public final void nodeCreated(final NodeCreatedEvent ne) {
System.out.println(format(new Date()) + " [CustomCacheListener] Created key:
" + ne.getFqn().toString());
}
@NodeEvicted
public final void nodeEvicted(final NodeEvictedEvent ne) {
System.out.println(format(new Date()) + " [CustomCacheListener] Evicted key:
" + ne.getFqn().toString());
}
@NodeLoaded
public final void nodeLoaded(final NodeLoadedEvent ne) {
System.out.println(format(new Date()) + " [CustomCacheListener] Loaded key:
" + ne.getFqn().toString());
}
@NodePassivated
public final void nodePassivated(final NodePassivatedEvent ne) {
System.out.println(format(new Date()) + " [CustomCacheListener] Passivated
key: " + ne.getFqn().toString());
}
@NodeRemoved
public final void nodeRemoved(final NodeRemovedEvent cere) {
System.out.println(format(new Date()) + " [CustomCacheListener] Removed key:
" + cere.getFqn().toString());
}
@NodeVisited
public final void nodeVisited(final NodeVisitedEvent ne) {
System.out.println(format(new Date()) + " [CustomCacheListener] Visited key:
" + ne.getFqn().toString());
}
}
*****
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7:21 p.m.
New subject: [JBoss Cache] - Re: JBoss Cache 3.x Eviction notification
Swaminathan Bhaskar [http://community.jboss.org/people/swaminathan.bhaskar] created the
discussion
"Re: JBoss Cache 3.x Eviction notification"
To view the discussion, visit: http://community.jboss.org/message/606372#606372
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Hi Jay,
First off - thank you very much for your response. Much appreciated. Yes, I did try that
and it does not work as I would expect. Let me provide you the code:
Here is the listener code:
*import org.jboss.cache.notifications.annotation.*;*
*import org.jboss.cache.notifications.event.*;*
*@CacheListener*
*public class MyCacheListener {*
* @NodeEvicted*
* public void logNodeEvent(NodeEvictedEvent ne) {*
* System.out.println("***** Evicted FQN: " + ne.getFqn() + ", Type:
" + ne.getType());*
* }*
*}*
Here is the main code:
*import org.jboss.cache.*;*
*public class MyJBossCacheTest1 {*
* @SuppressWarnings({ "rawtypes", "unchecked" })*
* public static void main(String[] args) {*
* if (args.length != 1) {*
* System.out.printf("Usage: java %s <config-file>\n",
MyJBossCacheTest1.class.getName());*
* System.exit(1);*
* }*
* CacheFactory factory = new DefaultCacheFactory();*
* Cache cache = factory.createCache(args[0]);*
* cache.addCacheListener(new MyCacheListener());*
* cache.start();*
* Fqn myUserData = Fqn.fromString("/my/data/user");*
* // Prime Cache with User Data*
* {*
* int MAX_USERS = 3;*
* for (int i = 1; i <= MAX_USERS; i++) {*
* String user = "u." + i;*
* String email = "user_" + i +"(a)nowhere.com";*
* cache.put(myUserData, user, email);*
* }*
* }*
* // Access User - "u.2"*
* {*
* String user = (String) cache.get(myUserData, "u.2");*
* if (user != null) {*
* System.out.println("Accessed - " + user);*
* }*
* else {*
* System.out.println("Access of u.2 is null");*
* }*
* }*
* // Access Users after sleep of 30 secs*
* {*
* System.out.println("Ready to sleep for 30 secs ...");*
* try {*
* Thread.sleep(30000);*
* }*
* catch (Exception ex) {*
* }*
* System.out.println("Ready to access user(s) ...");*
* int MAX_USERS = 3;*
* for (int i = 1; i <= MAX_USERS; i++) {*
* String user = (String) cache.get(myUserData, "u."+i);*
* if (user != null) {*
* System.out.println("Accessed - " + user);*
* }*
* else {*
* System.out.println("Access of u." + i + " is
null");*
* }*
* }*
* }*
* cache.stop();*
* cache.destroy();*
* }*
*}*
Was expection to see the FQNs: /my/user/data/u.1, /my/data/user/u.2, and /my/data/user/u.3
to be shown by the listener on eviction. But instead I see the following:
***** Evicted FQN: /my/data/user, Type: NODE_EVICTED
***** Evicted FQN: /my/data/user, Type: NODE_EVICTED
In other words I would not know which keys were evicted ... Any ideas ?
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