FetchOperation.java example

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/*
 * Licensed to Crate under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial
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 */

package io.crate.operation.projectors.fetch;

import com.carrotsearch.hppc.IntContainer;
import com.carrotsearch.hppc.IntObjectMap;
import io.crate.data.Bucket;

import java.util.concurrent.CompletableFuture;

public interface FetchOperation {

    /**
     * @param nodeId       the nodeId of the node from which to fetch from
     * @param toFetch      a map from readerIds to docIds which should be fetched
     * @param closeContext indicate if context must be closed after fetch
     */
    CompletableFuture<IntObjectMap<? extends Bucket>> fetch(String nodeId,
                                                            IntObjectMap<? extends IntContainer> toFetch,
                                                            boolean closeContext);
}