Java tutorial
/** * This file is derived from org.apache.maven.cli.ExecutionEventLogger * from the Apache Maven project and modified for malabar-mode use by * Espen Wiborg. The original license header appears below. */ /* * * 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.grumblesmurf.malabar; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; import java.util.TimeZone; import org.apache.maven.execution.BuildFailure; import org.apache.maven.execution.BuildSuccess; import org.apache.maven.execution.BuildSummary; import org.apache.maven.execution.ExecutionEvent; import org.apache.maven.execution.MavenExecutionResult; import org.apache.maven.execution.MavenSession; import org.apache.maven.execution.AbstractExecutionListener; import org.apache.maven.plugin.MojoExecution; import org.apache.maven.project.MavenProject; import org.codehaus.plexus.logging.Logger; /** * Logs execution events to a user-supplied logger. * * @author Benjamin Bentmann */ public class ExecutionEventLogger extends AbstractExecutionListener { private static final String SEPARATOR = "------------------------------------------------------------------------"; private final Logger logger; public ExecutionEventLogger(Logger logger) { this.logger = logger; } @Override public void projectDiscoveryStarted(ExecutionEvent event) { if (logger.isInfoEnabled()) { logger.info("Scanning for projects..."); } } @Override public void sessionStarted(ExecutionEvent event) { if (logger.isInfoEnabled() && event.getSession().getProjects().size() > 1) { logHeader("Reactor Build Order:"); for (MavenProject project : event.getSession().getProjects()) { logger.info(project.getName()); } } } @Override public void sessionEnded(ExecutionEvent event) { if (logger.isInfoEnabled()) { if (event.getSession().getProjects().size() > 1) { logReactorSummary(event.getSession()); } logResult(event.getSession()); logStats(event.getSession()); logger.info(SEPARATOR); } } private void logReactorSummary(MavenSession session) { logHeader("Reactor Summary:"); MavenExecutionResult result = session.getResult(); for (MavenProject project : session.getProjects()) { StringBuilder buffer = new StringBuilder(128); buffer.append(project.getName()); buffer.append(' '); while (buffer.length() < SEPARATOR.length() - 21) { buffer.append('.'); } buffer.append(' '); BuildSummary buildSummary = result.getBuildSummary(project); if (buildSummary == null) { buffer.append("SKIPPED"); } else if (buildSummary instanceof BuildSuccess) { buffer.append("SUCCESS ["); buffer.append(getFormattedTime(buildSummary.getTime())); buffer.append("]"); } else if (buildSummary instanceof BuildFailure) { buffer.append("FAILURE ["); buffer.append(getFormattedTime(buildSummary.getTime())); buffer.append("]"); } logger.info(buffer.toString()); } } private void logResult(MavenSession session) { logger.info(SEPARATOR); if (session.getResult().hasExceptions()) { logger.info("BUILD FAILURE"); } else { logger.info("BUILD SUCCESS"); } } private void logStats(MavenSession session) { logger.info(SEPARATOR); Date finish = new Date(); long time = finish.getTime() - session.getRequest().getStartTime().getTime(); logger.info("Total time: " + getFormattedTime(time)); logger.info("Finished at: " + finish); System.gc(); Runtime r = Runtime.getRuntime(); long MB = 1024 * 1024; logger.info("Final Memory: " + (r.totalMemory() - r.freeMemory()) / MB + "M/" + r.totalMemory() / MB + "M"); } @Override public void projectSkipped(ExecutionEvent event) { if (logger.isInfoEnabled()) { logger.info(SEPARATOR); logger.info("Skipping " + event.getProject().getName()); logger.info("This project has been banned from the build due to previous failures."); logger.info(SEPARATOR); } } @Override public void projectStarted(ExecutionEvent event) { if (logger.isInfoEnabled()) { logger.info(SEPARATOR); logger.info("Building " + event.getProject().getName() + " " + event.getProject().getVersion()); logger.info(SEPARATOR); } } @Override public void mojoSkipped(ExecutionEvent event) { if (logger.isWarnEnabled()) { logger.warn("Goal " + event.getMojoExecution().getGoal() + " requires online mode for execution but Maven is currently offline, skipping"); } } @Override public void mojoStarted(ExecutionEvent event) { if (logger.isInfoEnabled()) { MojoExecution me = event.getMojoExecution(); StringBuilder buffer = new StringBuilder(128); buffer.append("--- ").append(me.getArtifactId()).append(':').append(me.getVersion()).append(':') .append(me.getGoal()); if (me.getExecutionId() != null) { buffer.append(" (").append(me.getExecutionId()).append(')'); } buffer.append(" @ ").append(event.getProject().getArtifactId()); buffer.append(" ---"); logger.info(""); logger.info(buffer.toString()); } } @Override public void forkStarted(ExecutionEvent event) { if (logger.isDebugEnabled()) { logger.debug("Forking execution for " + event.getMojoExecution().getMojoDescriptor().getId()); } } @Override public void forkSucceeded(ExecutionEvent event) { if (logger.isDebugEnabled()) { logger.debug("Completed forked execution for " + event.getMojoExecution().getMojoDescriptor().getId()); } } private static String getFormattedTime(long time) { String pattern = "s.SSS's'"; if (time / 60000L > 0) { pattern = "m:s" + pattern; if (time / 3600000L > 0) { pattern = "H:m" + pattern; } } DateFormat fmt = new SimpleDateFormat(pattern); fmt.setTimeZone(TimeZone.getTimeZone("UTC")); return fmt.format(new Date(time)); } private void logHeader(String header) { logger.info(SEPARATOR); logger.info(header); logger.info(""); } }