custom timedCacheFactory problem
lost_traveller Nov 2, 2006 5:52 AMWe have a problem whereby a user is logged out after 30 minutes and JBoss attempts to re-login, since we use a custom Principal which contains a session id the session id is lost.
The reason a user logs out after 30 minutes is because in jboss-service.xml DefaultCacheTimeout is set to 1800 seconds. What we would like is not to specify a time but to allow a users timeout to be refreshed each time a secure method is called, which is possible because org.jboss.util.TimedCachePolicy contains a refersh() method, which is currently hard-coded to return false. So what we have done is extend TimedCachePolicy and override refresh() to refresh the timeout:
public class TimedRefreshCachePolicy extends TimedCachePolicy implements Serializable { /** * @see org.jboss.util.TimedCachePolicy#insert(java.lang.Object, java.lang.Object) */ @Override public void insert(Object key, Object value) { super.insert(key, new RefreshTimedEntry(getDefaultLifetime(), value)); } /** * The default implementation of TimedEntry used to wrap non-TimedEntry objects inserted into the * cache. */ static class RefreshTimedEntry implements TimedEntry, Serializable { private long expirationTime = -1; private Object value = null; private long lifetime = -1; RefreshTimedEntry(final long lifetime, final Object value) { this.expirationTime = 1000 * lifetime; this.value = value; this.lifetime = lifetime; } public void init(long now) { expirationTime += now; } public boolean isCurrent(long now) { return expirationTime > now; } public boolean refresh() { // this is called to refresh the time since the last call to this item in the // cache, return true to indicate that a refresh took place and that the item // is still valid expirationTime = System.currentTimeMillis() + (1000 * lifetime); return true; } public void destroy() { } public Object getValue() { return value; } } }
According to chapter 8 we can configure our own cache policy:
This is done by appending the name of the security domain to this name when looking up the CachePolicy for a domain
We have create an MBean to bind TimedRefreshCachePolicy to our security domain:
public class PetStoreService extends ServiceMBeanSupport implements PetStoreServiceMBean { ...... new InitialContext().bind("java:/timedCacheFactory/petstore", Class.forName("com.foo.TimedRefreshCachePolicy").newInstance()); Object obj0 = new InitialContext().lookup("java:/timedCacheFactory"); Object obj1 = new InitialContext().lookup("java:/timedCacheFactory/petstore"); Object obj3 = new InitialContext().lookup("java:/timedCacheFactory/sdmfhsjhdfcnb"); .... }
The problem is TimedRefreshCachePolicy won't bind to java:/timedCacheFactory/petstore in fact we can insert any text after java:/timedCacheFactory and it will return a TimedCachePolicy, from the code above:
obj0 returns some proxy
obj1 returns a TimedCachePolicy
obj2 returns a TimedCachePolicy
So how do I bind my TimedRefreshCachePolicy to java:/timedCacheFactory/petstore? or have we got this wrong and implemented it in the wrong way? We would preferably like a CachePolicy on a per domain basis, without having to change any JBoss configuration.