| package org.apache.cassandra.stress.operations; |
| /* |
| * |
| * 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. |
| * |
| */ |
| |
| |
| import org.apache.commons.math3.distribution.EnumeratedDistribution; |
| |
| import org.apache.cassandra.stress.Operation; |
| import org.apache.cassandra.stress.generate.Distribution; |
| import org.apache.commons.math3.util.Pair; |
| |
| public class SampledOpDistribution implements OpDistribution |
| { |
| |
| final EnumeratedDistribution<Operation> operations; |
| final Distribution clustering; |
| private Operation cur; |
| private long remaining; |
| |
| public SampledOpDistribution(EnumeratedDistribution<Operation> operations, Distribution clustering) |
| { |
| this.operations = operations; |
| this.clustering = clustering; |
| } |
| |
| public Operation next() |
| { |
| while (remaining == 0) |
| { |
| remaining = clustering.next(); |
| cur = operations.sample(); |
| } |
| remaining--; |
| return cur; |
| } |
| |
| public void initTimers() |
| { |
| for (Pair<Operation, Double> op : operations.getPmf()) |
| { |
| op.getFirst().timer.init(); |
| } |
| } |
| |
| public void closeTimers() |
| { |
| for (Pair<Operation, Double> op : operations.getPmf()) |
| { |
| op.getFirst().timer.close(); |
| } |
| } |
| } |