package org.infinispan.notifications.cachelistener.cluster;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Collections;
import java.util.Set;
import java.util.UUID;
import org.infinispan.Cache;
import org.infinispan.commons.marshall.AbstractExternalizer;
import org.infinispan.distexec.DistributedCallable;
import org.infinispan.marshall.core.Ids;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
/**
* This DistributedCallable is used to remove registered {@link RemoteClusterListener} on each of the various nodes
* when a cluster listener is unregistered from the cache.
*
* @author wburns
* @since 7.0
*/
public class ClusterListenerRemoveCallable<K, V> implements DistributedCallable<K, V, Void> {
private static final Log log = LogFactory.getLog(ClusterListenerRemoveCallable.class);
private static final boolean trace = log.isTraceEnabled();
private transient Cache<K, V> cache;
private final UUID identifier;
public ClusterListenerRemoveCallable(UUID identifier) {
this.identifier = identifier;
}
@Override
public void setEnvironment(Cache<K, V> cache, Set<K> inputKeys) {
this.cache = cache;
}
@Override
public Void call() throws Exception {
// Remove the listener from the cache now
Set<Object> listeners = cache.getListeners();
for (Object listener : listeners) {
if (listener instanceof RemoteClusterListener) {
RemoteClusterListener clusterListener = (RemoteClusterListener)listener;
if (identifier.equals(clusterListener.getId())) {
if (trace) {
log.tracef("Removing local cluster listener due to parent cluster listener was removed : %s", identifier);
}
clusterListener.removeListener();
}
}
}
return null;
}
public static class Externalizer extends AbstractExternalizer<ClusterListenerRemoveCallable> {
@Override
public Set<Class<? extends ClusterListenerRemoveCallable>> getTypeClasses() {
return Collections.singleton(ClusterListenerRemoveCallable.class);
}
@Override
public void writeObject(ObjectOutput output, ClusterListenerRemoveCallable object) throws IOException {
output.writeObject(object.identifier);
}
@Override
public ClusterListenerRemoveCallable readObject(ObjectInput input) throws IOException, ClassNotFoundException {
return new ClusterListenerRemoveCallable((UUID)input.readObject());
}
@Override
public Integer getId() {
return Ids.CLUSTER_LISTENER_REMOVE_CALLABLE;
}
}
}