| /** |
| * 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.distributedlog.injector; |
| |
| import org.apache.distributedlog.config.DynamicDistributedLogConfiguration; |
| import org.apache.distributedlog.util.Utils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Injector that injects random delays. |
| */ |
| public class RandomDelayFailureInjector implements FailureInjector { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(RandomDelayFailureInjector.class); |
| |
| private final DynamicDistributedLogConfiguration dynConf; |
| |
| public RandomDelayFailureInjector(DynamicDistributedLogConfiguration dynConf) { |
| this.dynConf = dynConf; |
| } |
| |
| private int delayMs() { |
| return dynConf.getEIInjectedWriteDelayMs(); |
| } |
| |
| private double delayPct() { |
| return dynConf.getEIInjectedWriteDelayPercent(); |
| } |
| |
| private boolean enabled() { |
| return delayMs() > 0 && delayPct() > 0; |
| } |
| |
| @Override |
| public void inject() { |
| try { |
| if (enabled() && Utils.randomPercent(delayPct())) { |
| Thread.sleep(delayMs()); |
| } |
| } catch (InterruptedException ex) { |
| LOG.warn("delay was interrupted ", ex); |
| } |
| } |
| } |