| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| #ifndef _CMS_MESSAGEAVAILABLELISTENER_H_ |
| #define _CMS_MESSAGEAVAILABLELISTENER_H_ |
| |
| #include <cms/Config.h> |
| |
| namespace cms { |
| |
| class MessageConsumer; |
| |
| /** |
| * A listener interface similar to the MessageListener interface. This listener |
| * is notified by its associated MessageConsumer that a new Message is available |
| * for processing when the consumer is in sync consumption mode. A consumer with |
| * a registered MessageListener will not use this listener. |
| */ |
| class CMS_API MessageAvailableListener { |
| public: |
| |
| virtual ~MessageAvailableListener(); |
| |
| /** |
| * Indicates that a new Message has become available for consumption |
| * from the provided consumer, a call to receiveNoWait should return |
| * the message immediately. |
| * |
| * @param consumer |
| * The consumer that now has a message queued for consumption. |
| */ |
| virtual void onMessageAvailable(cms::MessageConsumer* consumer) = 0; |
| |
| }; |
| |
| } |
| #endif /* _CMS_MESSAGEAVAILABLELISTENER_H_ */ |