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Micro-tuning for StandardListenerFactory

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This commit is contained in:
Sanne Grinovero 2013-08-01 23:28:44 +01:00
parent 8aff7db2e0
commit aea6b767ae
1 changed files with 6 additions and 3 deletions
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9
hibernate-entitymanager/src/main/java/org/hibernate/jpa/event/internal/jpa/StandardListenerFactory.java
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@ -24,7 +24,6 @@
package org.hibernate.jpa.event.internal.jpa;
import javax.persistence.PersistenceException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.hibernate.jpa.event.spi.jpa.ListenerFactory;
@ -36,7 +35,8 @@
* @author Steve Ebersole
*/
public class StandardListenerFactory implements ListenerFactory {
private Map listenerInstances = new ConcurrentHashMap();
private final ConcurrentHashMap listenerInstances = new ConcurrentHashMap();
@Override
@SuppressWarnings("unchecked")
@ -52,7 +52,10 @@ public <T> T buildListener(Class<T> listenerClass) {
e
);
}
listenerInstances.put( listenerClass, listenerInstance );
Object existing = listenerInstances.putIfAbsent( listenerClass, listenerInstance );
if ( existing != null ) {
listenerInstance = existing;
}
}
return (T) listenerInstance;
}