/*
* 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.io;
import org.apache.tinkerpop.gremlin.AbstractGremlinTest;
import org.apache.tinkerpop.gremlin.FeatureRequirement;
import org.apache.tinkerpop.gremlin.TestHelper;
import org.apache.tinkerpop.gremlin.structure.Direction;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.structure.VertexProperty;
import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoWriter;
import org.apache.tinkerpop.gremlin.structure.util.detached.DetachedFactory;
import org.apache.tinkerpop.gremlin.structure.util.star.StarGraph;
import org.javatuples.Pair;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Random;
import java.util.UUID;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* @author Stephen Mallette (http://stephen.genoprime.com)
*/
public class IoIntegrateTest extends AbstractGremlinTest {
private static final Logger logger = LoggerFactory.getLogger(IoIntegrateTest.class);
@Test
@FeatureRequirement(featureClass = Graph.Features.VertexFeatures.class, feature = Graph.Features.VertexFeatures.FEATURE_ADD_VERTICES)
@FeatureRequirement(featureClass = Graph.Features.VertexFeatures.class, feature = Graph.Features.VertexFeatures.FEATURE_ADD_PROPERTY)
@FeatureRequirement(featureClass = Graph.Features.VertexFeatures.class, feature = Graph.Features.VertexFeatures.FEATURE_META_PROPERTIES)
@FeatureRequirement(featureClass = Graph.Features.VertexFeatures.class, feature = Graph.Features.VertexFeatures.FEATURE_MULTI_PROPERTIES)
@FeatureRequirement(featureClass = Graph.Features.EdgeFeatures.class, feature = Graph.Features.EdgeFeatures.FEATURE_ADD_EDGES)
@FeatureRequirement(featureClass = Graph.Features.EdgeFeatures.class, feature = Graph.Features.EdgeFeatures.FEATURE_ADD_PROPERTY)
public void shouldHaveSizeOfStarGraphLessThanDetached() throws Exception {
final Random random = new Random(95746498l);
final Vertex vertex = graph.addVertex("person");
for (int i = 0; i < 100; i++) { // vertex properties and meta properties
vertex.property(VertexProperty.Cardinality.list, UUID.randomUUID().toString(), random.nextDouble(),
"acl", random.nextBoolean() ? "public" : "private",
"created", random.nextLong());
}
for (int i = 0; i < 50000; i++) { // edges and edge properties
vertex.addEdge("knows", graph.addVertex("person"), "since", random.nextLong(), "acl", random.nextBoolean() ? "public" : "private");
graph.addVertex("software").addEdge("createdBy", vertex, "date", random.nextLong());
graph.addVertex("group").addEdge("hasMember", vertex);
}
///////////////
Pair<StarGraph, Integer> pair = serializeDeserialize(StarGraph.of(vertex));
int starGraphSize = pair.getValue1();
TestHelper.validateEquality(vertex, pair.getValue0().getStarVertex());
///
pair = serializeDeserialize(pair.getValue0());
assertEquals(starGraphSize, pair.getValue1().intValue());
starGraphSize = pair.getValue1();
TestHelper.validateEquality(vertex, pair.getValue0().getStarVertex());
///
pair = serializeDeserialize(pair.getValue0());
assertEquals(starGraphSize, pair.getValue1().intValue());
starGraphSize = pair.getValue1();
TestHelper.validateEquality(vertex, pair.getValue0().getStarVertex());
///
// this is a rough approximation of "detached" serialization of all vertices and edges.
// now that writeVertex in gryo writes StarGraph that approach can't be used anymore to test
// serialization size of detached.
final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
final GryoWriter writer = graph.io(IoCore.gryo()).writer().create();
writer.writeObject(outputStream, DetachedFactory.detach(vertex, true));
vertex.edges(Direction.BOTH).forEachRemaining(e -> writer.writeObject(outputStream, DetachedFactory.detach(e, true)));
final int detachedVertexSize = outputStream.size();
assertTrue(starGraphSize < detachedVertexSize);
logger.info("Size of star graph: {}", starGraphSize);
logger.info("Size of detached vertex: {}", detachedVertexSize);
logger.info("Size reduction: {}", (float) detachedVertexSize / (float) starGraphSize);
}
private Pair<StarGraph, Integer> serializeDeserialize(final StarGraph starGraph) {
final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
try {
graph.io(IoCore.gryo()).writer().create().writeObject(outputStream, starGraph);
return Pair.with(graph.io(IoCore.gryo()).reader().create().readObject(new ByteArrayInputStream(outputStream.toByteArray()), StarGraph.class), outputStream.size());
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
}
}