| /* |
| * 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.jackrabbit.oak.commons.junit; |
| |
| import java.io.PrintWriter; |
| import java.io.StringWriter; |
| |
| import ch.qos.logback.classic.LoggerContext; |
| import ch.qos.logback.classic.PatternLayout; |
| import ch.qos.logback.classic.spi.ILoggingEvent; |
| import ch.qos.logback.core.read.CyclicBufferAppender; |
| import org.junit.rules.TestWatcher; |
| import org.junit.runner.Description; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * The LogDumper Rule collects logs which are generated due to execution of test and dumps them |
| * locally upon test failure. This simplifies determining failure |
| * cause by providing all required data locally. This would be specially useful when running test |
| * in CI server where server logs gets cluttered with all other test executions |
| * <p/> |
| * <pre> |
| * public class LoginTestIT { |
| * |
| * @Rule |
| * public TestRule logDumper = new LogDumper(); |
| * |
| * @Test |
| * public void remoteLogin() { |
| * //test stuff |
| * assertEquals("testA", name.getMethodName()); |
| * } |
| * |
| * } |
| * </pre> |
| */ |
| public class LogDumper extends TestWatcher { |
| /** |
| * Number of log entries to keep in memory |
| */ |
| private static final int LOG_BUFFER_SIZE = 1000; |
| |
| /** |
| * Message pattern used to render logs |
| */ |
| private static final String DEFAULT_PATTERN = "%d{dd.MM.yyyy HH:mm:ss.SSS} *%level* [%thread] %logger %msg%n"; |
| |
| private CyclicBufferAppender<ILoggingEvent> appender; |
| |
| private final int logBufferSize; |
| |
| /** |
| * Creates a new LogDumper with default log buffer size (1000) |
| */ |
| public LogDumper() { |
| this(LOG_BUFFER_SIZE); |
| } |
| |
| /** |
| * Creates a new LogDumper with the given log buffer size |
| * @param logBufferSize |
| */ |
| public LogDumper(int logBufferSize) { |
| this.logBufferSize = logBufferSize; |
| } |
| |
| @Override |
| protected void finished(Description description) { |
| deregisterAppender(); |
| } |
| |
| @Override |
| protected void starting(Description description) { |
| registerAppender(); |
| } |
| |
| @Override |
| protected void failed(Throwable e, Description description) { |
| final StringWriter sw = new StringWriter(); |
| final PrintWriter pw = new PrintWriter(sw); |
| |
| try { |
| String msg = e.getMessage(); |
| if (msg != null) { |
| pw.println(msg); |
| } |
| |
| pw.printf("=============== Logs for [%s#%s]===================%n", |
| description.getClassName(), description.getMethodName()); |
| pw.print(getLogs()); |
| pw.println("========================================================"); |
| |
| |
| } catch (Throwable t) { |
| System.err.println("Error occurred while fetching test logs"); |
| t.printStackTrace(System.err); |
| } |
| |
| System.err.print(sw.toString()); |
| } |
| |
| private String getLogs() { |
| if (appender == null) { |
| return "<Logs cannot be determined>"; |
| } |
| PatternLayout layout = createLayout(); |
| StringBuilder sb = new StringBuilder(); |
| for (int i = 0; i < appender.getLength(); i++) { |
| sb.append(layout.doLayout(appender.get(i))); |
| } |
| return sb.toString(); |
| } |
| |
| private void registerAppender() { |
| appender = new CyclicBufferAppender<ILoggingEvent>(); |
| appender.setMaxSize(logBufferSize); |
| appender.setContext(getContext()); |
| appender.setName("TestLogCollector"); |
| appender.start(); |
| rootLogger().addAppender(appender); |
| } |
| |
| private void deregisterAppender() { |
| if (appender != null) { |
| rootLogger().detachAppender(appender); |
| appender.stop(); |
| appender = null; |
| } |
| } |
| |
| private static PatternLayout createLayout() { |
| PatternLayout pl = new PatternLayout(); |
| pl.setPattern(DEFAULT_PATTERN); |
| pl.setOutputPatternAsHeader(false); |
| pl.setContext(getContext()); |
| pl.start(); |
| return pl; |
| } |
| |
| private static LoggerContext getContext() { |
| return (LoggerContext) LoggerFactory.getILoggerFactory(); |
| } |
| |
| private static ch.qos.logback.classic.Logger rootLogger() { |
| return getContext().getLogger(ch.qos.logback.classic.Logger.ROOT_LOGGER_NAME); |
| } |
| } |