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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.
 */
package org.apache.tinkerpop.gremlin.structure;

import com.carrotsearch.junitbenchmarks.BenchmarkOptions;
import com.carrotsearch.junitbenchmarks.BenchmarkRule;
import com.carrotsearch.junitbenchmarks.annotation.AxisRange;
import com.carrotsearch.junitbenchmarks.annotation.BenchmarkHistoryChart;
import com.carrotsearch.junitbenchmarks.annotation.BenchmarkMethodChart;
import com.carrotsearch.junitbenchmarks.annotation.LabelType;
import org.apache.tinkerpop.gremlin.AbstractGremlinTest;
import org.apache.tinkerpop.gremlin.LoadGraphWith;
import org.apache.tinkerpop.gremlin.structure.io.GraphWriter;
import org.apache.tinkerpop.gremlin.structure.io.graphml.GraphMLIo;
import org.apache.tinkerpop.gremlin.structure.io.graphml.GraphMLWriter;
import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONIo;
import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONWriter;
import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoIo;
import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoWriter;
import org.junit.Rule;
import org.junit.Test;
import org.junit.experimental.runners.Enclosed;
import org.junit.rules.TestRule;
import org.junit.runner.RunWith;

import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import java.util.Optional;

/**
 * @author Stephen Mallette (http://stephen.genoprime.com)
 */
@RunWith(Enclosed.class)
public class GraphWritePerformanceTest {

    @AxisRange(min = 0, max = 1)
    @BenchmarkMethodChart(filePrefix = "structure-write")
    @BenchmarkHistoryChart(labelWith = LabelType.CUSTOM_KEY, maxRuns = 20, filePrefix = "hx-structure-write")
    public static class WriteToGraph extends AbstractGremlinTest {

        @Rule
        public TestRule benchmarkRun = new BenchmarkRule();

        @Test
        @BenchmarkOptions(benchmarkRounds = 10, warmupRounds = 0, concurrency = BenchmarkOptions.CONCURRENCY_SEQUENTIAL)
        public void writeEmptyVertices() throws Exception {
            final int verticesToGenerate = 100000;
            for (int ix = 0; ix < verticesToGenerate; ix++) {
                graph.addVertex();
                tryBatchCommit(graph, ix);
            }

            assertVertexEdgeCounts(verticesToGenerate, 0).accept(graph);
        }

        @Test
        @BenchmarkOptions(benchmarkRounds = 10, warmupRounds = 0, concurrency = BenchmarkOptions.CONCURRENCY_SEQUENTIAL)
        public void writeEmptyVerticesAndEdges() throws Exception {
            final int verticesToGenerate = 100000;
            Optional lastVertex = Optional.empty();
            for (int ix = 0; ix < verticesToGenerate; ix++) {
                final Vertex v = graph.addVertex();
                if (lastVertex.isPresent())
                    v.addEdge("parent", lastVertex.get());

                lastVertex = Optional.of(v);
                tryBatchCommit(graph, ix);
            }

            assertVertexEdgeCounts(verticesToGenerate, verticesToGenerate - 1).accept(graph);
        }
    }

    @AxisRange(min = 0, max = 1)
    @BenchmarkMethodChart(filePrefix = "io-write")
    @BenchmarkHistoryChart(labelWith = LabelType.CUSTOM_KEY, maxRuns = 20, filePrefix = "hx-io-write")
    public static class WriteToIO extends AbstractGremlinTest {
        @Rule
        public TestRule benchmarkRun = new BenchmarkRule();

        @Test
        @LoadGraphWith(LoadGraphWith.GraphData.GRATEFUL)
        @BenchmarkOptions(benchmarkRounds = 10, warmupRounds = 0, concurrency = BenchmarkOptions.CONCURRENCY_SEQUENTIAL)
        public void writeGryo() throws Exception {
            final GraphWriter writer = graph.io(GryoIo.build()).writer().create();
            final OutputStream os = new ByteArrayOutputStream();
            writer.writeGraph(os, graph);
        }

        @Test
        @LoadGraphWith(LoadGraphWith.GraphData.GRATEFUL)
        @BenchmarkOptions(benchmarkRounds = 10, warmupRounds = 0, concurrency = BenchmarkOptions.CONCURRENCY_SEQUENTIAL)
        public void writeGraphML() throws Exception {
            final GraphWriter writer = graph.io(GraphMLIo.build()).writer().create();
            final OutputStream os = new ByteArrayOutputStream();
            writer.writeGraph(os, graph);
        }

        @Test
        @LoadGraphWith(LoadGraphWith.GraphData.GRATEFUL)
        @BenchmarkOptions(benchmarkRounds = 10, warmupRounds = 0, concurrency = BenchmarkOptions.CONCURRENCY_SEQUENTIAL)
        public void writeGraphSON() throws Exception {
            final GraphWriter writer = graph.io(GraphSONIo.build()).writer().create();
            final OutputStream os = new ByteArrayOutputStream();
            writer.writeGraph(os, graph);
        }
    }

    private static void tryBatchCommit(final Graph g, int ix) {
        if (g.features().graph().supportsTransactions() && ix % 1000 == 0)
            g.tx().commit();
    }
}