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Core package for Neo4j Procedures

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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * 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 apoc.example;

import apoc.result.ProgressInfo;
import apoc.util.Util;
import java.util.stream.Stream;
import org.neo4j.graphdb.QueryStatistics;
import org.neo4j.graphdb.Result;
import org.neo4j.graphdb.Transaction;
import org.neo4j.procedure.Context;
import org.neo4j.procedure.Description;
import org.neo4j.procedure.Mode;
import org.neo4j.procedure.NotThreadSafe;
import org.neo4j.procedure.Procedure;

/**
 * @author mh
 * @since 24.05.16
 */
public class Examples {

    @Context
    public Transaction tx;

    @NotThreadSafe
    @Procedure(name = "apoc.example.movies", mode = Mode.WRITE)
    @Description("Seeds the database with the Neo4j movie dataset.")
    public Stream movies() {
        long start = System.currentTimeMillis();
        String file = "movies.cypher";
        Result result = tx.execute(Util.readResourceFile(file));
        QueryStatistics stats = result.getQueryStatistics();
        ProgressInfo progress = new ProgressInfo(file, "example movie database from themoviedb.org", "cypher")
                .update(stats.getNodesCreated(), stats.getRelationshipsCreated(), stats.getPropertiesSet())
                .done(start);
        result.close();
        return Stream.of(progress);
    }
}