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Advanced and thread-safe Java Redis client for synchronous, asynchronous, and reactive usage. Supports Cluster, Sentinel, Pipelining, Auto-Reconnect, Codecs and much more.

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/*
 * Copyright 2011-2016 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 com.lambdaworks.redis.cluster.api.async;

import java.util.*;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;

import com.lambdaworks.redis.cluster.models.partitions.RedisClusterNode;

/**
 * Result holder for a command that was executed asynchronously on multiple nodes. This API is subject to incompatible changes
 * in a future release. The API is exempt from any compatibility guarantees made by lettuce. The current state implies nothing
 * about the quality or performance of the API in question, only the fact that it is not "API-frozen."
 *
 * The NodeSelection command API and its result types are a base for discussions.
 *
 * 
 * @author Mark Paluch
 * @since 4.0
 */
public interface AsyncExecutions extends Iterable> {

    /**
     *
     * @return map between {@link RedisClusterNode} and the {@link CompletionStage}
     */
    Map> asMap();

    /**
     *
     * @return collection of nodes on which the command was executed.
     */
    Collection nodes();

    /**
     *
     * @param redisClusterNode the node
     * @return the completion stage for this node
     */
    CompletionStage get(RedisClusterNode redisClusterNode);

    /**
     *
     * @return array of futures.
     */
    CompletableFuture[] futures();

    /**
     *
     * @return iterator over the {@link CompletionStage}s
     */
    @Override
    default Iterator> iterator() {
        return asMap().values().iterator();
    }

    /**
     *
     * @return a {@code Spliterator} over the {@link CompletionStage CompletionStages} in this collection
     */
    @Override
    default Spliterator> spliterator() {
        return Spliterators.spliterator(iterator(), nodes().size(), 0);
    }

    /**
     * @return a sequential {@code Stream} over the {@link CompletionStage CompletionStages} in this collection
     */
    default Stream> stream() {
        return StreamSupport.stream(spliterator(), false);
    }
}