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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.

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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.cassandra.net;

import java.io.IOException;

/**
 * IVerbHandler provides the method that all verb handlers need to implement.
 * The concrete implementation of this interface would provide the functionality
 * for a given verb.
 */
public interface IVerbHandler
{
    /**
     * This method delivers a message to the implementing class (if the implementing
     * class was registered by a call to MessagingService.registerVerbHandlers).
     * Note that the caller should not be holding any locks when calling this method
     * because the implementation may be synchronized.
     *
     * @param message - incoming message that needs handling.
     */
    void doVerb(Message message) throws IOException;
}