core/api/src/main/java/org/onosproject/store/service/StorageService.java

/*
 * Copyright 2015 Open Networking Laboratory
 *
 * Licensed 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.onosproject.store.service;

/**
 * Storage service.
 * <p>
 * This service provides operations for creating key-value stores.
 * One can chose to create key-value stores with varying properties such
 * as strongly consistent vs eventually consistent, durable vs volatile.
 * <p>
 * Various store implementations should leverage the data structures provided
 * by this service
 */
public interface StorageService {

    /**
     * Creates a new transaction context.
     *
     * @return transaction context
     */
    TransactionContext createTransactionContext();

    /**
     * Creates a new EventuallyConsistentMapBuilder.
     *
     * @param <K> key type
     * @param <V> value type
     * @return builder for an eventually consistent map
     */
    <K, V> EventuallyConsistentMapBuilder<K, V> eventuallyConsistentMapBuilder();

    /**
     * Creates a new EventuallyConsistentMapBuilder.
     *
     * @param <K> key type
     * @param <V> value type
     * @return builder for an eventually consistent map
     */
    <K, V> ConsistentMapBuilder<K, V> consistentMapBuilder();
}