package org.infinispan.cdi.embedded.event.cache;
import javax.enterprise.event.Event;
import javax.enterprise.util.TypeLiteral;
import org.infinispan.Cache;
import org.infinispan.distribution.ch.ConsistentHash;
import org.infinispan.notifications.Listener;
import org.infinispan.notifications.cachelistener.annotation.TopologyChanged;
import org.infinispan.notifications.cachelistener.event.TopologyChangedEvent;
import org.infinispan.notifications.cachelistener.event.TransactionRegisteredEvent;
import org.infinispan.transaction.xa.GlobalTransaction;
/**
* @author Pete Muir
*/
@Listener
public class TopologyChangedAdapter<K, V> extends AbstractAdapter<TopologyChangedEvent<K, V>> {
/**
* CDI does not allow parametrized type for events (like <code><K,V></code>). This is why this wrapped needs to be
* introduced. To ensure type safety, this needs to be linked to parent class (in other words this class can not
* be static).
*/
private class CDITopologyChangedEvent implements TopologyChangedEvent<K, V> {
private TopologyChangedEvent<K, V> decoratedEvent;
private CDITopologyChangedEvent(TopologyChangedEvent<K, V> decoratedEvent) {
this.decoratedEvent = decoratedEvent;
}
@Override
public ConsistentHash getReadConsistentHashAtStart() {
return decoratedEvent.getReadConsistentHashAtStart();
}
@Override
public ConsistentHash getWriteConsistentHashAtStart() {
return decoratedEvent.getWriteConsistentHashAtStart();
}
@Override
public ConsistentHash getReadConsistentHashAtEnd() {
return decoratedEvent.getReadConsistentHashAtEnd();
}
@Override
public ConsistentHash getWriteConsistentHashAtEnd() {
return decoratedEvent.getWriteConsistentHashAtEnd();
}
@Override
public int getNewTopologyId() {
return decoratedEvent.getNewTopologyId();
}
@Override
public Type getType() {
return decoratedEvent.getType();
}
@Override
public boolean isPre() {
return decoratedEvent.isPre();
}
@Override
public Cache<K, V> getCache() {
return decoratedEvent.getCache();
}
}
/**
* Needed for creating event bridge.
*/
public static final TransactionRegisteredEvent<?, ?> EMPTY = new TransactionRegisteredEvent<Object, Object>() {
@Override
public Type getType() {
return null;
}
@Override
public GlobalTransaction getGlobalTransaction() {
return null;
}
@Override
public boolean isOriginLocal() {
return false;
}
@Override
public boolean isPre() {
return false;
}
@Override
public Cache<Object, Object> getCache() {
return null;
}
};
/**
* Events which will be selected (including generic type information (<code><?, ?></code>).
*/
@SuppressWarnings("serial")
public static final TypeLiteral<TopologyChangedEvent<?, ?>> WILDCARD_TYPE = new TypeLiteral<TopologyChangedEvent<?, ?>>() {
};
public TopologyChangedAdapter(Event<TopologyChangedEvent<K, V>> event) {
super(event);
}
@Override
@TopologyChanged
public void fire(TopologyChangedEvent<K, V> payload) {
super.fire(new CDITopologyChangedEvent(payload));
}
}