modules/cassandra/store/src/main/java/org/apache/ignite/cache/store/cassandra/session/CassandraSession.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 org.apache.ignite.cache.store.cassandra.session;

import java.io.Closeable;
import java.util.List;
import org.apache.ignite.cache.store.cassandra.session.transaction.Mutation;

/**
 * Wrapper around Cassandra driver session, to automatically handle:
 * <ul>
 *  <li>Keyspace and table absence exceptions</li>
 *  <li>Timeout exceptions</li>
 *  <li>Batch operations</li>
 * </ul>
 */
public interface CassandraSession extends Closeable {
    /**
     * Execute single synchronous operation against Cassandra  database.
     *
     * @param assistant execution assistance to perform the main operation logic.
     * @param <V> type of the result returned from operation.
     *
     * @return result of the operation.
     */
    public <V> V execute(ExecutionAssistant<V> assistant);

    /**
     * Executes batch asynchronous operation against Cassandra database.
     *
     * @param assistant execution assistance to perform the main operation logic.
     * @param data data which should be processed in batch operation.
     * @param <R> type of the result returned from batch operation.
     * @param <V> type of the value used in batch operation.
     *
     * @return result of the operation.
     */
    public <R, V> R execute(BatchExecutionAssistant<R, V> assistant, Iterable<? extends V> data);

    /**
     * Executes batch asynchronous operation to load bunch of records
     * specified by CQL statement from Cassandra database
     *
     * @param assistant execution assistance to perform the main operation logic.
     */
    public void execute(BatchLoaderAssistant assistant);

    /**
     * Executes all the mutations performed withing Ignite transaction against Cassandra database.
     *
     * @param mutations Mutations.
     */
    public void execute(List<Mutation> mutations);
}