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CamelClusterView.java
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CamelClusterView.java
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/**
* 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.
*/
package org.apache.camel.ha;
import java.util.List;
import java.util.function.BiConsumer;
import java.util.function.Predicate;
/**
* Represents the View of the cluster at some given period of time.
*/
public interface CamelClusterView {
enum Event {
KEEP_ALIVE,
LEADERSHIP_CHANGED;
}
/**
* @return the cluster.
*/
CamelCluster getCluster();
/**
* @return the namespace for this view.
*/
String getNamespace();
/**
* Provides the master member.
*
* @return the master member.
*/
CamelClusterMember getMaster();
/**
* Provides the local member.
*
* @return the local member.
*/
CamelClusterMember getLocalMember();
/**
* Provides the list of members of the cluster.
*
* @return the list of members.
*/
List<CamelClusterMember> getMembers();
/**
* Add an event consumer.
*
* @param consumer the event consumer.
*/
void addEventListener(BiConsumer<Event, Object> consumer);
/**
* Add an event consumer for events matching the given predicate.
*
* @param predicate the predicate to filter events.
* @param consumer the event consumer.
*/
void addEventListener(Predicate<Event> predicate, BiConsumer<Event, Object> consumer);
/**
* Remove the event consumer.
*
* @param event the event consumer.
*/
void removeEventListener(BiConsumer<Event, Object> event);
}