| /** |
| * 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.util.Utils; |
| |
| import java.util.Random; |
| |
| /** |
| * Failure injector based on {@link java.util.Random} |
| */ |
| public class AsyncRandomFailureInjector implements AsyncFailureInjector { |
| |
| private static final Random random = new Random(System.currentTimeMillis()); |
| |
| public static Builder newBuilder() { |
| return new Builder(); |
| } |
| |
| public static class Builder { |
| |
| private boolean _simulateDelays = false; |
| private boolean _simulateErrors = false; |
| private boolean _simulateStops = false; |
| private boolean _simulateCorruption = false; |
| private int _injectedDelayPercent = 0; |
| private int _injectedErrorPercent = 0; |
| private int _injectedStopPercent = 0; |
| private int _maxInjectedDelayMs = Integer.MAX_VALUE; |
| |
| private Builder() {} |
| |
| public Builder injectDelays(boolean simulateDelays, |
| int injectedDelayPercent, |
| int maxInjectedDelayMs) { |
| this._simulateDelays = simulateDelays; |
| this._injectedDelayPercent = injectedDelayPercent; |
| this._maxInjectedDelayMs = maxInjectedDelayMs; |
| return this; |
| } |
| |
| public Builder injectErrors(boolean simulateErrors, |
| int injectedErrorPercent) { |
| this._simulateErrors = simulateErrors; |
| this._injectedErrorPercent = injectedErrorPercent; |
| return this; |
| } |
| |
| public Builder injectCorruption(boolean simulateCorruption) { |
| this._simulateCorruption = simulateCorruption; |
| return this; |
| } |
| |
| public Builder injectStops(boolean simulateStops, |
| int injectedStopPercent) { |
| this._simulateStops = simulateStops; |
| this._injectedStopPercent = injectedStopPercent; |
| return this; |
| } |
| |
| public AsyncFailureInjector build() { |
| return new AsyncRandomFailureInjector( |
| _simulateDelays, |
| _injectedDelayPercent, |
| _maxInjectedDelayMs, |
| _simulateErrors, |
| _injectedErrorPercent, |
| _simulateStops, |
| _injectedStopPercent, |
| _simulateCorruption); |
| } |
| |
| } |
| |
| private boolean simulateDelays; |
| private boolean simulateErrors; |
| private boolean simulateStops; |
| private boolean simulateCorruption; |
| private final int injectedDelayPercent; |
| private final int injectedErrorPercent; |
| private final int injectedStopPercent; |
| private final int maxInjectedDelayMs; |
| |
| private AsyncRandomFailureInjector(boolean simulateDelays, |
| int injectedDelayPercent, |
| int maxInjectedDelayMs, |
| boolean simulateErrors, |
| int injectedErrorPercent, |
| boolean simulateStops, |
| int injectedStopPercent, |
| boolean simulateCorruption) { |
| this.simulateDelays = simulateDelays; |
| this.injectedDelayPercent = injectedDelayPercent; |
| this.maxInjectedDelayMs = maxInjectedDelayMs; |
| this.simulateErrors = simulateErrors; |
| this.injectedErrorPercent = injectedErrorPercent; |
| this.simulateStops = simulateStops; |
| this.injectedStopPercent = injectedStopPercent; |
| this.simulateCorruption = simulateCorruption; |
| } |
| |
| @Override |
| public void injectErrors(boolean enabled) { |
| this.simulateErrors = enabled; |
| } |
| |
| @Override |
| public boolean shouldInjectErrors() { |
| return simulateErrors && Utils.randomPercent(injectedErrorPercent); |
| } |
| |
| @Override |
| public void injectDelays(boolean enabled) { |
| this.simulateDelays = enabled; |
| } |
| |
| @Override |
| public boolean shouldInjectDelays() { |
| return simulateDelays && Utils.randomPercent(injectedDelayPercent); |
| } |
| |
| @Override |
| public int getInjectedDelayMs() { |
| if (maxInjectedDelayMs > 0) { |
| return random.nextInt(maxInjectedDelayMs); |
| } |
| return 0; |
| } |
| |
| @Override |
| public void injectStops(boolean enabled) { |
| this.simulateStops = enabled; |
| } |
| |
| @Override |
| public boolean shouldInjectStops() { |
| return simulateStops && Utils.randomPercent(injectedStopPercent); |
| } |
| |
| @Override |
| public boolean shouldInjectCorruption(long startEntryId, long endEntryId) { |
| if (!simulateCorruption) { |
| return false; |
| } |
| if (startEntryId == endEntryId) { |
| return startEntryId % 10 == 0; |
| } |
| for (long i = startEntryId; i <= endEntryId; i++) { |
| if (i % 10 == 0) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("FailureInjector["); |
| sb.append("errors=(").append(simulateErrors).append(", pct=") |
| .append(injectedErrorPercent).append("), "); |
| sb.append("delays=(").append(simulateDelays).append(", pct=") |
| .append(injectedDelayPercent).append(", max=") |
| .append(maxInjectedDelayMs).append("), "); |
| sb.append("stops=(").append(simulateStops).append(", pct=") |
| .append(injectedStopPercent).append(")"); |
| sb.append("corruption=(").append(simulateCorruption).append(")"); |
| sb.append("]"); |
| return sb.toString(); |
| } |
| } |