Reception.java

/*
 * Copyright (C) 2010 Red Hat, Inc. and/or its affiliates.
 *
 * 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;

/**
 * <p>Distinguishes conditional
 * {@linkplain javax.enterprise.event.Observes observer methods} from observer
 * methods which are always notified.</p>
 * <p/>
 * <p>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.</p>
 * <p/>
 * <p>Beans with scope
 * {@link javax.enterprise.context.Dependent @Dependent} may not
 * have conditional observer methods.</p>
 *
 * @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_EXISTS,

  /**
   * Specifies that an observer method always receives event notifications.
   */
  ALWAYS
}