| /* |
| * 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.cassandra.stress.operations; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import com.google.common.util.concurrent.RateLimiter; |
| |
| import org.apache.cassandra.stress.Operation; |
| import org.apache.cassandra.stress.WorkManager; |
| import org.apache.cassandra.stress.generate.Distribution; |
| import org.apache.cassandra.stress.generate.PartitionGenerator; |
| import org.apache.cassandra.stress.generate.PartitionIterator; |
| import org.apache.cassandra.stress.generate.RatioDistribution; |
| import org.apache.cassandra.stress.generate.Seed; |
| import org.apache.cassandra.stress.generate.SeedManager; |
| import org.apache.cassandra.stress.settings.OptionRatioDistribution; |
| import org.apache.cassandra.stress.settings.StressSettings; |
| import org.apache.cassandra.stress.util.Timer; |
| |
| public abstract class PartitionOperation extends Operation |
| { |
| protected final DataSpec spec; |
| private final static RatioDistribution defaultRowPopulationRatio = OptionRatioDistribution.BUILDER.apply("fixed(1)/1").get(); |
| |
| private final List<PartitionIterator> partitionCache = new ArrayList<>(); |
| protected List<PartitionIterator> partitions; |
| |
| public static final class DataSpec |
| { |
| public final PartitionGenerator partitionGenerator; |
| final SeedManager seedManager; |
| final Distribution partitionCount; |
| final RatioDistribution useRatio; |
| final RatioDistribution rowPopulationRatio; |
| final Integer targetCount; |
| |
| public DataSpec(PartitionGenerator partitionGenerator, SeedManager seedManager, Distribution partitionCount, RatioDistribution rowPopulationRatio, Integer targetCount) |
| { |
| this(partitionGenerator, seedManager, partitionCount, null, rowPopulationRatio, targetCount); |
| } |
| public DataSpec(PartitionGenerator partitionGenerator, SeedManager seedManager, Distribution partitionCount, RatioDistribution useRatio, RatioDistribution rowPopulationRatio) |
| { |
| this(partitionGenerator, seedManager, partitionCount, useRatio, rowPopulationRatio, null); |
| } |
| private DataSpec(PartitionGenerator partitionGenerator, SeedManager seedManager, Distribution partitionCount, RatioDistribution useRatio, RatioDistribution rowPopulationRatio, Integer targetCount) |
| { |
| this.partitionGenerator = partitionGenerator; |
| this.seedManager = seedManager; |
| this.partitionCount = partitionCount; |
| this.useRatio = useRatio; |
| this.rowPopulationRatio = rowPopulationRatio == null ? defaultRowPopulationRatio : rowPopulationRatio; |
| this.targetCount = targetCount; |
| } |
| } |
| |
| public PartitionOperation(Timer timer, StressSettings settings, DataSpec spec) |
| { |
| super(timer, settings); |
| this.spec = spec; |
| } |
| |
| public boolean ready(WorkManager permits, RateLimiter rateLimiter) |
| { |
| int partitionCount = (int) spec.partitionCount.next(); |
| if (partitionCount <= 0) |
| return false; |
| partitionCount = permits.takePermits(partitionCount); |
| if (partitionCount <= 0) |
| return false; |
| |
| int i = 0; |
| boolean success = true; |
| for (; i < partitionCount && success ; i++) |
| { |
| if (i >= partitionCache.size()) |
| partitionCache.add(PartitionIterator.get(spec.partitionGenerator, spec.seedManager)); |
| |
| success = false; |
| while (!success) |
| { |
| Seed seed = spec.seedManager.next(this); |
| if (seed == null) |
| break; |
| |
| success = reset(seed, partitionCache.get(i)); |
| } |
| } |
| partitionCount = i; |
| |
| if (rateLimiter != null) |
| rateLimiter.acquire(partitionCount); |
| |
| partitions = partitionCache.subList(0, partitionCount); |
| return !partitions.isEmpty(); |
| } |
| |
| protected boolean reset(Seed seed, PartitionIterator iterator) |
| { |
| if (spec.useRatio == null) |
| return iterator.reset(seed, spec.targetCount, spec.rowPopulationRatio.next(), isWrite()); |
| else |
| return iterator.reset(seed, spec.useRatio.next(), spec.rowPopulationRatio.next(), isWrite()); |
| } |
| |
| public String key() |
| { |
| List<String> keys = new ArrayList<>(); |
| for (PartitionIterator partition : partitions) |
| keys.add(partition.getKeyAsString()); |
| return keys.toString(); |
| } |
| } |