下面列出了怎么用org.apache.log4j.RollingFileAppender的API类实例代码及写法，或者点击链接到github查看源代码。
@SuppressWarnings("UseOfSystemOutOrSystemErr")
public static void tieSystemOutAndErrToLog()
{
org.apache.log4j.Logger rootLogger = org.apache.log4j.Logger.getRootLogger();
Appender appender = rootLogger.getAppender(DT_LOG_APPENDER);
if (appender instanceof RollingFileAppender) {
RollingFileAppender rfa = (RollingFileAppender)appender;
if (rfa.getFile() == null || rfa.getFile().isEmpty()) {
rfa.setFile(System.getProperty(DT_LOGDIR));
rfa.activateOptions();
}
} else if (appender != null) {
logger.warn("found appender {} instead of RollingFileAppender", appender);
}
LoggerUtil.addAppenders();
System.setOut(createLoggingProxy(System.out));
System.setErr(createLoggingProxy(System.err));
}
private void configureAuditLogs() throws IOException {
// Shutdown the LogManager to release all logger open file handles.
// Unfortunately, Apache commons logging library does not provide
// means to release underlying loggers. For additional info look up
// commons library FAQ.
LogManager.shutdown();
File file = new File(auditLogFile);
if (file.exists()) {
assertTrue(file.delete());
}
Logger logger = ((Log4JLogger) FSNamesystem.auditLog).getLogger();
// disable logging while the cluster startup preps files
logger.setLevel(Level.OFF);
PatternLayout layout = new PatternLayout("%m%n");
RollingFileAppender appender = new RollingFileAppender(layout, auditLogFile);
logger.addAppender(appender);
}
private void configureAuditLogs() throws IOException {
// Shutdown the LogManager to release all logger open file handles.
// Unfortunately, Apache commons logging library does not provide
// means to release underlying loggers. For additional info look up
// commons library FAQ.
LogManager.shutdown();
File file = new File(auditLogFile);
if (file.exists()) {
assertTrue(file.delete());
}
Logger logger = ((Log4JLogger) FSNamesystem.auditLog).getLogger();
// disable logging while the cluster startup preps files
logger.setLevel(Level.OFF);
PatternLayout layout = new PatternLayout("%m%n");
RollingFileAppender appender = new RollingFileAppender(layout, auditLogFile);
logger.addAppender(appender);
}
@SuppressWarnings("UseOfSystemOutOrSystemErr")
public static void tieSystemOutAndErrToLog()
{
org.apache.log4j.Logger rootLogger = org.apache.log4j.Logger.getRootLogger();
Appender appender = rootLogger.getAppender(DT_LOG_APPENDER);
if (appender instanceof RollingFileAppender) {
RollingFileAppender rfa = (RollingFileAppender)appender;
if (rfa.getFile() == null || rfa.getFile().isEmpty()) {
rfa.setFile(System.getProperty(DT_LOGDIR));
rfa.activateOptions();
}
} else if (appender != null) {
logger.warn("found appender {} instead of RollingFileAppender", appender);
}
LoggerUtil.addAppenders();
System.setOut(createLoggingProxy(System.out));
System.setErr(createLoggingProxy(System.err));
}
@Override
public void close() {
try {
isClosing.lock();
super.flush();
Optional<String> opKey = extractKey();
if (opKey.isPresent()) {
RollingFileAppender appender = appenderCache.remove(opKey.get());
if (appender != null) {
appender.close();
}
}
} finally {
isClosing.unlock();
}
}
public Logger createCustomFileLogger(String file) throws IOException {
// ----
ConsoleAppender console = new ConsoleAppender();
String PATTERN = "%m%n-%c: ";
console.setLayout(new PatternLayout(PATTERN));
console.setThreshold(Level.INFO);
console.activateOptions();
Logger log = Logger.getLogger(Thread.currentThread().getName());
log.getLoggerRepository().resetConfiguration();
log.removeAllAppenders();
log.addAppender(console);
// ----
org.apache.log4j.RollingFileAppender rfa = new RollingFileAppender(new org.apache.log4j.PatternLayout(PATTERN),
file);
log.addAppender(rfa);
rfa.setImmediateFlush(true);
return log;
}
/** Sets up log4j logger for auditlogs */
private void setupAuditLogs() throws IOException {
File file = new File(auditLogFile);
if (file.exists()) {
file.delete();
}
Logger logger = ((Log4JLogger) FSNamesystem.auditLog).getLogger();
logger.setLevel(Level.INFO);
PatternLayout layout = new PatternLayout("%m%n");
RollingFileAppender appender = new RollingFileAppender(layout, auditLogFile);
logger.addAppender(appender);
}
/**
* Constructs a new ebics logger with a given file
* @param logFile the log file
*/
public DefaultEbicsLogger(File logFile) {
this.logFile = logFile;
logger = Logger.getLogger(DefaultEbicsLogger.class);
consoleAppender = new ConsoleAppender();
fileAppender = new RollingFileAppender();
}
/** Sets up log4j logger for auditlogs */
private void setupAuditLogs() throws IOException {
File file = new File(auditLogFile);
if (file.exists()) {
file.delete();
}
Logger logger = ((Log4JLogger) FSNamesystem.auditLog).getLogger();
logger.setLevel(Level.INFO);
PatternLayout layout = new PatternLayout("%m%n");
RollingFileAppender appender = new RollingFileAppender(layout, auditLogFile);
logger.addAppender(appender);
}
private static void initAppenders() throws IOException {
systemLogAppender = new RollingFileAppender(getLayout(), logFilePath
+ File.separatorChar + "system.log");
accessLogAppender = new RollingFileAppender(getLayout(), logFilePath
+ File.separatorChar + "access.log");
auditLogAppender = new RollingFileAppender(getLayout(), logFilePath
+ File.separatorChar + "audit.log");
reverseProxyLogAppender = new RollingFileAppender(getLayout(),
logFilePath + File.separatorChar + "reverseproxy.log");
// setting the max backup index and file size
systemLogAppender.setMaxBackupIndex(MAX_BACKUP_INDEX);
systemLogAppender.setMaxFileSize(MAX_FILE_SIZE);
systemLogAppender.setName(systemLogAppenderName);
accessLogAppender.setMaxBackupIndex(MAX_BACKUP_INDEX);
accessLogAppender.setMaxFileSize(MAX_FILE_SIZE);
accessLogAppender.setName(accessLogAppenderName);
auditLogAppender.setMaxBackupIndex(MAX_BACKUP_INDEX);
auditLogAppender.setMaxFileSize(MAX_FILE_SIZE);
auditLogAppender.setName(auditLogAppenderName);
reverseProxyLogAppender.setMaxBackupIndex(MAX_BACKUP_INDEX);
reverseProxyLogAppender.setMaxFileSize(MAX_FILE_SIZE);
reverseProxyLogAppender.setName(reverseProxyLogAppenderName);
}
private static void changeFileAppenderIfNew(Logger logger,
String fileAppenderName, RollingFileAppender newFileAppender) {
Appender existingFileAppender = logger.getAppender(fileAppenderName);
if (existingFileAppender == null) {
logger.removeAppender(consoleAppender);
logger.addAppender(newFileAppender);
} else if (existingFileAppender != newFileAppender) {
logger.removeAppender(existingFileAppender);
logger.addAppender(newFileAppender);
}
return;
}
@BeforeClass
public static void beforeClass() throws IOException
{
String logFileDir = new File("target" + File.separator + "logDir").getAbsolutePath();
logFileName = logFileDir + File.separator + "appTest.log";
RollingFileAppender rfa = new RollingFileAppender(new PatternLayout("%d{ISO8601} [%t] %-5p %c{2} %M - %m%n"),
logFileName);
rfa.setName(APPENDER_NAME);
logger.addAppender(rfa);
}
@Test
public void testImmediateFlushOff()
{
RollingFileAppender rfa = (RollingFileAppender)logger.getAppender(APPENDER_NAME);
assertTrue(rfa.getImmediateFlush());
rfa.setImmediateFlush(false);
assertNull(LoggerUtil.getLogFileInformation());
rfa.setImmediateFlush(true);
}
@Test
public void testErrorLevelOff()
{
RollingFileAppender rfa = (RollingFileAppender)logger.getAppender(APPENDER_NAME);
assertNull(rfa.getThreshold());
rfa.setThreshold(Level.FATAL);
assertNull(LoggerUtil.getLogFileInformation(logger));
rfa.setThreshold(null);
}
@Test
public void testNoFileAppender()
{
RollingFileAppender rfa = (RollingFileAppender)logger.getAppender(APPENDER_NAME);
logger.removeAppender(APPENDER_NAME);
assertNull(LoggerUtil.getLogFileInformation());
logger.addAppender(rfa);
}
@Override
protected void apply() {
RollingFileAppender appender = appenderCache.get(key);
if (appender != null) {
appender.append(event);
}
}
private void installFileAppender(String logFilename) {
RollingFileAppender file = new RollingFileAppender();
file.setName("FileAppender");
file.setThreshold(logLevel);
file.setFile(new File(logFilename).getAbsolutePath());
file.setMaxFileSize(MAX_FILE_SIZE);
file.setMaxBackupIndex(MAX_BACKUPS);
file.setLayout(new PatternLayout(PATTERN));
file.setAppend(true);
file.activateOptions();
Logger.getRootLogger().addAppender(file);
}
@Test
public void configure_shouldInstallFileAppenderFromArguments() throws Exception {
String[] arguments = loggingConfigurator.configure(new String[]{"-log", "target/" + LOG_FILENAME});
assertEquals(0, arguments.length);
Appender appender = Logger.getRootLogger().getAppender("FileAppender");
assertNotNull(appender);
assertThat(appender, instanceOf(RollingFileAppender.class));
assertThat(((RollingFileAppender) appender).getFile(), endsWith(LOG_FILENAME));
assertThat(arguments.length, is(0));
}
public void createFileLogger(String file) throws IOException {
// ----
ConsoleAppender console = new ConsoleAppender();
String PATTERN = "%m%n";
console.setLayout(new PatternLayout(PATTERN));
console.setThreshold(Level.INFO);
console.activateOptions();
Logger.getRootLogger().getLoggerRepository().resetConfiguration();
Logger.getRootLogger().removeAllAppenders();
Logger.getRootLogger().addAppender(console);
// ----
org.apache.log4j.RollingFileAppender rfa = new RollingFileAppender(new org.apache.log4j.PatternLayout(), file);
Logger.getRootLogger().addAppender(rfa);
}
@Override
public void onNodeConfigurationRead(Node node)
{
DbConn cnx = Helpers.getNewDbSession();
// Main log levels comes from configuration
CommonService.setLogLevel(node.getRootLogLevel());
this.logLevel = node.getRootLogLevel();
// Log multicasting (& log4j stdout redirect)
String gp1 = GlobalParameter.getParameter(cnx, "logFilePerLaunch", "true");
if ("true".equals(gp1) || "both".equals(gp1))
{
oneLogPerLaunch = true;
RollingFileAppender a = (RollingFileAppender) Logger.getRootLogger().getAppender("rollingfile");
MultiplexPrintStream s = new MultiplexPrintStream(System.out, FilenameUtils.getFullPath(a.getFile()), "both".equals(gp1));
System.setOut(s);
((ConsoleAppender) Logger.getRootLogger().getAppender("consoleAppender")).setWriter(new OutputStreamWriter(s));
s = new MultiplexPrintStream(System.err, FilenameUtils.getFullPath(a.getFile()), "both".equals(gp1));
System.setErr(s);
}
// Jetty
this.server = new JettyServer();
this.server.start(node, cnx);
// Deployment scanner
String gp2 = GlobalParameter.getParameter(cnx, "directoryScannerRoot", "");
if (!gp2.isEmpty())
{
scanner = new DirectoryScanner(gp2, node);
(new Thread(scanner)).start();
}
cnx.close();
}
static void setLogFileName(String name)
{
Appender a = Logger.getRootLogger().getAppender("rollingfile");
if (a == null)
{
return;
}
RollingFileAppender r = (RollingFileAppender) a;
r.setFile("./logs/jqm-" + name + ".log");
r.activateOptions();
}
private static WriterAppender createAppender(File logFile)
throws IOException {
HTMLLayout layout = new HTMLLayout();
RollingFileAppender app = new RollingFileAppender(layout,
logFile.getAbsolutePath(), true);
app.setMaxFileSize("3MB");
app.setMaxBackupIndex(3);
return app;
}
private Logger createScriptLogger(ScriptSettings scriptSettings, String reportFolder) throws IOException, WorkspaceStructureException {
org.apache.log4j.Logger scriptLogger = org.apache.log4j.Logger.getLogger("TestScript_" + RandomStringUtils.randomAlphanumeric(10));
scriptLogger.removeAllAppenders();
PatternLayout layout = new PatternLayout(scriptSettings.getFileLayout());
RollingFileAppender fileAppender = new RollingFileAppender(layout, workspaceDispatcher.createFile(FolderType.REPORT, true, reportFolder, "script.log").getPath());
fileAppender.setName("TESTSCRIPTFILEAPPENDER");
fileAppender.setThreshold(Level.toLevel(scriptSettings.getFileLoggerLevel()));
fileAppender.activateOptions();
HTMLLayout htmlLayout = new HTMLLayout();
RollingFileAppender htmlFileAppender = new RollingFileAppender(htmlLayout, workspaceDispatcher.createFile(FolderType.REPORT, true, reportFolder, "scriptlog.html").getPath());
htmlFileAppender.setName("HTMLTESTSCRIPTFILEAPPENDER");
htmlFileAppender.setThreshold(Level.toLevel(scriptSettings.getFileLoggerLevel()));
PatternLayout conLayout = new PatternLayout(scriptSettings.getConsoleLayout());
ConsoleAppender conAppender = new ConsoleAppender(conLayout);
conAppender.setThreshold(Level.toLevel(scriptSettings.getConsoleLoggerLevel()));
conAppender.activateOptions();
scriptLogger.addAppender(fileAppender);
scriptLogger.addAppender(conAppender);
scriptLogger.addAppender(htmlFileAppender);
return LoggerFactory.getLogger(scriptLogger.getName());
}