src/main/java/org/apache/accumulo/testing/performance/tests/ProbabilityFilter.java

/*
 * 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.accumulo.testing.performance.tests;

import java.util.Map;
import java.util.Random;
import java.util.function.BiPredicate;

import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.Value;

public class ProbabilityFilter extends YieldingFilter {
  @Override
  protected BiPredicate<Key,Value> createPredicate(Map<String,String> options) {
    double matchProbability = Double.parseDouble(options.get("probability"));
    Random rand = new Random();
    return (k, v) -> rand.nextDouble() < matchProbability;
  }
}