storm-core/src/jvm/backtype/storm/nimbus/ITopologyActionNotifierPlugin.java

/**
 * 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 backtype.storm.nimbus;

import java.util.Map;

/**
 * A plugin interface that gets invoked any time there is an action for a topology.
 */
public interface ITopologyActionNotifierPlugin {
    /**
     * Called once during nimbus initialization.
     * @param StormConf
     */
    void prepare(Map StormConf);

    /**
     * When a new actions is executed for a topology, this method will be called.
     * @param topologyName
     * @param action
     */
    void notify(String topologyName, String action);

    /**
     * called during shutdown.
     */
    void cleanup();
}