/*
 * Copyright 2014 the original author or authors.
 *
 * 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.gradle.cache.internal;

/**
 * An indexed cache that may perform updates asynchronously.
 */
public interface MultiProcessSafeAsyncPersistentIndexedCache<K, V> extends UnitOfWorkParticipant {
    /**
     * Fetches the given entry, blocking until the result is available.
     */
    V get(K key);

    /**
     * Submits an update to be applied later. This method may or may not block, and will invoke the given completion action when the operation is complete.
     */
    void putLater(K key, V value, Runnable completion);

    /**
     * Submits a removal to be applied later. This method may or may not block, and will invoke the given completion action when the operation is complete.
     */
    void removeLater(K key, Runnable completion);
}
