Java tutorial
/** * DataCleaner (community edition) * Copyright (C) 2013 Human Inference * * This copyrighted material is made available to anyone wishing to use, modify, * copy, or redistribute it subject to the terms and conditions of the GNU * Lesser General Public License, as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License * for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this distribution; if not, write to: * Free Software Foundation, Inc. * 51 Franklin Street, Fifth Floor * Boston, MA 02110-1301 USA */ package org.eobjects.datacleaner.monitor.server.job; import java.io.OutputStream; import java.io.PrintWriter; import java.io.Serializable; import java.io.StringWriter; import java.util.Date; import java.util.concurrent.atomic.AtomicBoolean; import org.apache.commons.lang.SerializationUtils; import org.eobjects.analyzer.util.StringUtils; import org.eobjects.datacleaner.monitor.events.JobExecutedEvent; import org.eobjects.datacleaner.monitor.events.JobFailedEvent; import org.eobjects.datacleaner.monitor.job.ExecutionLogger; import org.eobjects.datacleaner.monitor.scheduling.model.ExecutionLog; import org.eobjects.datacleaner.monitor.scheduling.model.ExecutionStatus; import org.eobjects.datacleaner.monitor.server.jaxb.JaxbExecutionLogWriter; import org.eobjects.datacleaner.repository.RepositoryFile; import org.eobjects.datacleaner.repository.RepositoryFolder; import org.eobjects.datacleaner.util.FileFilters; import org.eobjects.metamodel.util.Action; import org.joda.time.LocalTime; import org.joda.time.format.DateTimeFormat; import org.joda.time.format.DateTimeFormatter; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.context.ApplicationEventPublisher; /** * Default implementation of the {@link ExecutionLogger} interface. Writes log * to {@link FileFilters#ANALYSIS_EXECUTION_LOG_XML} files in the result folder * of the tenant. */ public class ExecutionLoggerImpl implements ExecutionLogger { private static final Logger logger = LoggerFactory.getLogger(ExecutionLoggerImpl.class); private static final DateTimeFormatter DATE_TIME_FORMAT = DateTimeFormat.forPattern("HH:mm:ss"); private final ApplicationEventPublisher _eventPublisher; private final ExecutionLog _execution; private final StringBuilder _log; private final JaxbExecutionLogWriter _executionLogWriter; private final RepositoryFile _logFile; private final RepositoryFolder _resultFolder; private final AtomicBoolean _erronuous; public ExecutionLoggerImpl(ExecutionLog execution, RepositoryFolder resultFolder, ApplicationEventPublisher eventPublisher) { _execution = execution; _resultFolder = resultFolder; _eventPublisher = eventPublisher; _erronuous = new AtomicBoolean(false); _executionLogWriter = new JaxbExecutionLogWriter(); _log = new StringBuilder(); final String resultId = execution.getResultId(); final String logFilename = resultId + FileFilters.ANALYSIS_EXECUTION_LOG_XML.getExtension(); final RepositoryFile existingLogFile = resultFolder.getFile(logFilename); if (existingLogFile == null) { _logFile = resultFolder.createFile(logFilename, new Action<OutputStream>() { @Override public void run(OutputStream out) throws Exception { _executionLogWriter.write(_execution, out); } }); } else { _logFile = existingLogFile; } } @Override public void setStatusRunning() { _execution.setExecutionStatus(ExecutionStatus.RUNNING); if (_execution.getJobBeginDate() == null) { _execution.setJobBeginDate(new Date()); } log("Job execution BEGIN"); } @Override public void setStatusFailed(Object component, Object data, Throwable throwable) { boolean erronuousBefore = _erronuous.getAndSet(true); if (erronuousBefore) { // don't report another error if (throwable != null) { logger.error( "More than one error was reported, but only the first will be put into the user-log. This error was also reported: " + throwable.getMessage(), throwable); } } else { _execution.setJobEndDate(new Date()); _execution.setExecutionStatus(ExecutionStatus.FAILURE); final StringWriter stringWriter = new StringWriter(); stringWriter.write("Job execution FAILURE"); if (throwable != null && !StringUtils.isNullOrEmpty(throwable.getMessage())) { stringWriter.write("\n - "); stringWriter.write(throwable.getMessage()); stringWriter.write(" ("); stringWriter.write(throwable.getClass().getSimpleName()); stringWriter.write(")"); } if (component != null) { stringWriter.write('\n'); stringWriter.write(" - Failure component: " + component); } if (data != null) { stringWriter.write('\n'); stringWriter.write(" - Failure input data: " + data); } if (throwable != null) { stringWriter.write('\n'); stringWriter.write(" - Exception stacktrace of failure condition:"); stringWriter.write('\n'); final PrintWriter printWriter = new PrintWriter(stringWriter); throwable.printStackTrace(printWriter); printWriter.flush(); } stringWriter.write("\nCheck the server logs for more details, warnings and debug information."); log(stringWriter.toString()); flushLog(); if (_eventPublisher != null) { _eventPublisher.publishEvent(new JobFailedEvent(this, _execution, component, data, throwable)); } } } @Override public void setStatusSuccess(Object result) { if (result == null) { _execution.setResultPersisted(false); } else if (result instanceof Serializable) { try { log("Saving job result."); serializeResult((Serializable) result); _execution.setResultPersisted(true); } catch (Exception e) { log("Failed to save job result! Execution of the job was succesfull, but the result was not persisted."); _execution.setResultPersisted(false); setStatusFailed(null, result, e); return; } } else { log("Job returned in non persistent result: " + result); _execution.setResultPersisted(true); } log("Job execution SUCCESS"); _execution.setJobEndDate(new Date()); _execution.setExecutionStatus(ExecutionStatus.SUCCESS); flushLog(); if (_eventPublisher != null) { _eventPublisher.publishEvent(new JobExecutedEvent(this, _execution, result)); } } private void serializeResult(final Serializable result) { final String resultFilename = _execution.getResultId() + FileFilters.ANALYSIS_RESULT_SER.getExtension(); _resultFolder.createFile(resultFilename, new Action<OutputStream>() { @Override public void run(OutputStream out) throws Exception { SerializationUtils.serialize(result, out); } }); } @Override public void log(String message) { final String dateString = new LocalTime().toString(DATE_TIME_FORMAT); synchronized (_log) { if (_log.length() > 0) { _log.append('\n'); } _log.append(dateString); _log.append(" - "); _log.append(message); } } @Override public void log(String message, Throwable throwable) { final StringWriter stringWriter = new StringWriter(); if (message != null) { stringWriter.write(message); stringWriter.write('\n'); } final PrintWriter printWriter = new PrintWriter(stringWriter); throwable.printStackTrace(printWriter); printWriter.flush(); log(stringWriter.toString()); } @Override public void flushLog() { _execution.setLogOutput(_log.toString()); _logFile.writeFile(new Action<OutputStream>() { @Override public void run(OutputStream out) throws Exception { // synchronize while writing synchronized (_log) { _executionLogWriter.write(_execution, out); } } }); } }