javax.enterprise.event.Reception Maven / Gradle / Ivy
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* Copyright 2010, Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package javax.enterprise.event;
/**
*
* Distinguishes conditional {@linkplain javax.enterprise.event.Observes observer methods} from observer methods which are
* always notified.
*
*
*
* A conditional observer method is an observer method which is notified of an event only if an instance of the bean that
* defines the observer method already exists in the current context.
*
*
*
* Beans with scope {@link javax.enterprise.context.Dependent @Dependent} may not have conditional observer methods.
*
*
* @author Gavin King
* @author Dan Allen
* @author David Allen
*/
public enum Reception {
/**
*
* Specifies that an observer method is only called if the current instance of the bean declaring the observer method
* already exists.
*
*
* If there is no active context for the scope to which the bean declaring this observer method belongs, then the observer
* method is not called.
*
*/
IF_EXISTS,
/**
* Specifies that an observer method always receives event notifications.
*/
ALWAYS
}