/*
* 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.gryo;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.structure.io.GraphWriter;
import org.apache.tinkerpop.gremlin.structure.util.Attachable;
import org.apache.tinkerpop.gremlin.structure.util.detached.DetachedVertex;
import org.junit.Test;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.HashMap;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicBoolean;
import static org.junit.Assert.assertTrue;
/**
* @author Stephen Mallette (http://stephen.genoprime.com)
*/
public class GryoReaderWriterTest {
@Test
public void shouldBeAbleToReUseBuilderInDifferentThreads() throws Exception {
final ByteArrayOutputStream os = new ByteArrayOutputStream();
final GraphWriter writer = GryoWriter.build().create();
writer.writeVertex(os, new DetachedVertex(1, "test", new HashMap<>()));
os.close();
final byte[] bytes = os.toByteArray();
final CountDownLatch latch = new CountDownLatch(1);
final AtomicBoolean assertProcess1 = new AtomicBoolean(false);
final AtomicBoolean assertProcess2 = new AtomicBoolean(false);
final AtomicBoolean assertProcess3 = new AtomicBoolean(false);
// just one builder to re-use among threads
final GryoReader.Builder builder = GryoReader.build();
final Thread process1 = new Thread(() -> {
try {
latch.await();
final GryoReader reader = builder.create();
final Vertex v = reader.readVertex(new ByteArrayInputStream(bytes), Attachable::get);
assertProcess1.set(v.id().equals(1));
} catch (Exception ex) {
throw new RuntimeException(ex);
}
});
final Thread process2 = new Thread(() -> {
try {
latch.await();
final GryoReader reader = builder.create();
final Vertex v = reader.readVertex(new ByteArrayInputStream(bytes), Attachable::get);
assertProcess2.set(v.id().equals(1));
} catch (Exception ex) {
throw new RuntimeException(ex);
}
});
final Thread process3 = new Thread(() -> {
try {
latch.await();
final GryoReader reader = builder.create();
final Vertex v = reader.readVertex(new ByteArrayInputStream(bytes), Attachable::get);
assertProcess3.set(v.id().equals(1));
} catch (Exception ex) {
throw new RuntimeException(ex);
}
});
process1.start();
process2.start();
process3.start();
latch.countDown();
process3.join();
process2.join();
process1.join();
assertTrue(assertProcess1.get());
assertTrue(assertProcess2.get());
assertTrue(assertProcess3.get());
}
}