| /* |
| * 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.fluo.integration.impl; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.Random; |
| |
| import org.apache.accumulo.core.client.ConditionalWriter; |
| import org.apache.accumulo.core.client.Connector; |
| import org.apache.accumulo.core.client.TableNotFoundException; |
| import org.apache.accumulo.core.data.ConditionalMutation; |
| import org.apache.fluo.core.impl.Environment; |
| |
| public class FaultyConfig extends Environment { |
| |
| /** |
| * A writer that will sometimes return unknown. When it returns unknown the condition may or may |
| * not have been written. |
| * |
| * <p> |
| * The following code was copied from Accumulo in order to avoid depending on accumulo test |
| * module. |
| */ |
| private static class FaultyConditionalWriter implements ConditionalWriter { |
| |
| private ConditionalWriter cw; |
| private double up; |
| private Random rand; |
| private double wp; |
| |
| FaultyConditionalWriter(ConditionalWriter cw, double unknownProbability, |
| double writeProbability) { |
| this.cw = cw; |
| this.up = unknownProbability; |
| this.wp = writeProbability; |
| this.rand = new Random(); |
| } |
| |
| @Override |
| public Iterator<Result> write(Iterator<ConditionalMutation> mutations) { |
| ArrayList<Result> resultList = new ArrayList<>(); |
| ArrayList<ConditionalMutation> writes = new ArrayList<>(); |
| |
| while (mutations.hasNext()) { |
| ConditionalMutation cm = mutations.next(); |
| if (rand.nextDouble() <= up && rand.nextDouble() > wp) |
| resultList.add(new Result(Status.UNKNOWN, cm, null)); |
| else |
| writes.add(cm); |
| } |
| |
| if (writes.size() > 0) { |
| Iterator<Result> results = cw.write(writes.iterator()); |
| |
| while (results.hasNext()) { |
| Result result = results.next(); |
| |
| if (rand.nextDouble() <= up && rand.nextDouble() <= wp) |
| result = new Result(Status.UNKNOWN, result.getMutation(), result.getTabletServer()); |
| resultList.add(result); |
| } |
| } |
| return resultList.iterator(); |
| } |
| |
| @Override |
| public Result write(ConditionalMutation mutation) { |
| return write(Collections.singleton(mutation).iterator()).next(); |
| } |
| |
| @Override |
| public void close() { |
| cw.close(); |
| } |
| } |
| |
| private double up; |
| private double wp; |
| |
| FaultyConfig(Environment env, double up, double wp) throws Exception { |
| super(env); |
| this.up = up; |
| this.wp = wp; |
| } |
| |
| @Override |
| public Connector getConnector() { |
| return super.getConnector(); |
| } |
| |
| public ConditionalWriter createConditionalWriter() throws TableNotFoundException { |
| return new FaultyConditionalWriter(super.getSharedResources().getConditionalWriter(), up, wp); |
| } |
| } |