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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
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
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package org.apache.hugegraph.unit.rocksdb;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicLong;
import org.junit.Before;
import org.junit.Test;
import org.rocksdb.RocksDBException;
import org.apache.hugegraph.backend.id.Id;
import org.apache.hugegraph.backend.id.IdGenerator;
import org.apache.hugegraph.backend.store.rocksdb.RocksDBSessions.Session;
import org.apache.hugegraph.backend.store.rocksdb.RocksDBTables;
import org.apache.hugegraph.testutil.Assert;
import org.apache.hugegraph.type.HugeType;
public class RocksDBCountersTest extends BaseRocksDBUnitTest {
private static final String DATABASE = "test-db";
private static final int THREADS_NUM = 8;
private RocksDBTables.Counters counters;
@Override
@Before
public void setup() throws RocksDBException {
super.setup();
this.counters = new RocksDBTables.Counters(DATABASE);
this.rocks.createTable(this.counters.table());
}
@Test
public void testCounter() throws RocksDBException {
Session session = this.rocks.session();
for (int i = 1; i < 10000; i++) {
this.counters.increaseCounter(session, HugeType.PROPERTY_KEY, 1L);
long id = this.counters.getCounter(session, HugeType.PROPERTY_KEY);
Assert.assertEquals(i, id);
}
}
@Test
public void testCounterWithMultiTypes() throws RocksDBException {
Session session = this.rocks.session();
for (int i = 1; i < 1000; i++) {
this.counters.increaseCounter(session, HugeType.PROPERTY_KEY, 1L);
long id = this.counters.getCounter(session, HugeType.PROPERTY_KEY);
Assert.assertEquals(i, id);
this.counters.increaseCounter(session, HugeType.VERTEX_LABEL, 1L);
id = this.counters.getCounter(session, HugeType.VERTEX_LABEL);
Assert.assertEquals(i, id);
this.counters.increaseCounter(session, HugeType.EDGE_LABEL, 1L);
id = this.counters.getCounter(session, HugeType.EDGE_LABEL);
Assert.assertEquals(i, id);
this.counters.increaseCounter(session, HugeType.INDEX_LABEL, 1L);
id = this.counters.getCounter(session, HugeType.INDEX_LABEL);
Assert.assertEquals(i, id);
}
}
@Test
public void testCounterWithMutiThreads() {
final int TIMES = 1000;
AtomicLong times = new AtomicLong(0);
Map<Id, Boolean> ids = new ConcurrentHashMap<>();
runWithThreads(THREADS_NUM, () -> {
Session session = this.rocks.session();
for (int i = 0; i < TIMES; i++) {
Id id = nextId(session, HugeType.PROPERTY_KEY);
Assert.assertFalse(ids.containsKey(id));
ids.put(id, true);
times.incrementAndGet();
}
this.rocks.close();
});
Assert.assertEquals(THREADS_NUM * TIMES, times.get());
}
private Id nextId(Session session, HugeType type) {
final int MAX_TIMES = 1000;
// Do get-increase-get-compare operation
long counter = 0L;
long expect = -1L;
synchronized (this) {
for (int i = 0; i < MAX_TIMES; i++) {
counter = this.counters.getCounter(session, type);
if (counter == expect) {
break;
}
// Increase local counter
expect = counter + 1L;
// Increase remote counter
this.counters.increaseCounter(session, type, 1L);
}
}
return IdGenerator.of(expect);
}
}