Java Code Examples for ch.qos.logback.core.rolling.RollingFileAppender#setEncoder()

/**
 * 初始化日志
 */
private Logger initLog(Integer id) {
    // 实例化log，每个实例存放地方不一致
    ch.qos.logback.classic.Logger logger = ((ch.qos.logback.classic.Logger)
            LoggerFactory.getLogger(this.secretary.strategyName + "-" + id));

    LoggerContext context = logger.getLoggerContext();

    TimeBasedRollingPolicy<ILoggingEvent> policy = new TimeBasedRollingPolicy<>();
    policy.setFileNamePattern(OptionHelper.substVars(
            "logs/past/" + id + "/%d{yyyy-MM-dd}.log.gz", context));
    policy.setMaxHistory(31);
    policy.setContext(context);

    PatternLayoutEncoder encoder = new PatternLayoutEncoder();
    encoder.setContext(context);
    encoder.setPattern("%d{yyyy-MM-dd HH:mm:ss.SSS} %5level - [%thread] %logger : %msg%n");

    RollingFileAppender<ILoggingEvent> appender = new RollingFileAppender<>();
    appender.setContext(context);
    appender.setName(this.secretary.strategyName + "-" + id);
    appender.setFile(OptionHelper.substVars("logs/" + id + "/log.log", context));
    appender.setAppend(true);
    // 同一文件多输入完整检查
    appender.setPrudent(false);
    appender.setRollingPolicy(policy);
    appender.setEncoder(encoder);
    policy.setParent(appender);

    policy.start();
    encoder.start();
    appender.start();

    logger.setLevel(Level.INFO);
    // 终端输出
    logger.setAdditive(true);
    logger.addAppender(appender);

    return logger;
}
 

private RollingFileAppender<ILoggingEvent> rollingAppender(String file) {
    RollingFileAppender<ILoggingEvent> rollingFileAppender = new RollingFileAppender<>();
    rollingFileAppender.setEncoder(LogHelper.encoder("%date{ISO8601} - %msg%n"));
    rollingFileAppender.setContext(LogHelper.LOGGER_CONTEXT);
    rollingFileAppender.setFile(getEffectiveLogDirectory(file));
    rollingFileAppender.setName(UUID.randomUUID().toString());

    LogHelper.rollingPolicyForAppender(
            rollingFileAppender,
            "5 MB",
            "20 MB",
            4
    );
    rollingFileAppender.start();
    return rollingFileAppender;
}
 

private Appender buildAppender(String name, String fileName, String pattern) {
    RollingFileAppender appender = new RollingFileAppender();
    appender.setName(name);
    appender.setAppend(true);
    appender.setFile(new File(getLogPath(), fileName).getAbsolutePath());

    TimeBasedRollingPolicy rolling = new TimeBasedRollingPolicy();
    rolling.setParent(appender);
    rolling.setFileNamePattern(new File(getLogPath(), fileName).getAbsolutePath() + ".%d{yyyy-MM-dd}");
    appender.setRollingPolicy(rolling);

    PatternLayoutEncoder layout = new PatternLayoutEncoder();
    layout.setPattern(pattern);
    layout.setCharset(Charset.forName(getEncoding()));
    appender.setEncoder(layout);
    // 启动
    appender.start();
    return appender;
}
 

protected Appender buildAppender(String name, String fileName, String pattern) {
    RollingFileAppender appender = new RollingFileAppender();
    appender.setContext(loggerContext);
    appender.setName(name);
    appender.setAppend(true);
    appender.setFile(new File(getLogPath(), fileName).getAbsolutePath());

    TimeBasedRollingPolicy rolling = new TimeBasedRollingPolicy();
    rolling.setContext(loggerContext);
    rolling.setParent(appender);
    rolling.setFileNamePattern(new File(getLogPath(), fileName).getAbsolutePath() + ".%d{yyyy-MM-dd}");
    rolling.start();
    appender.setRollingPolicy(rolling);

    PatternLayoutEncoder layout = new PatternLayoutEncoder();
    layout.setContext(loggerContext);
    layout.setPattern(pattern);
    layout.setCharset(Charset.forName(getEncoding()));
    layout.start();
    appender.setEncoder(layout);
    // 启动
    appender.start();
    return appender;
}
 

private FileAppender<ILoggingEvent> getAppender(String pluginId) {
    File pluginLogFileLocation = pluginLogFile(pluginId);

    RollingFileAppender<ILoggingEvent> rollingFileAppender = new RollingFileAppender<>();
    rollingFileAppender.setEncoder(LogHelper.encoder());
    rollingFileAppender.setContext(LogHelper.LOGGER_CONTEXT);
    rollingFileAppender.setFile(pluginLogFileLocation.getPath());
    rollingFileAppender.setName(rollingFileAppenderName(pluginId));

    LogHelper.rollingPolicyForAppender(
            rollingFileAppender,
            "5 MB",
            "20 MB",
            7
    );

    rollingFileAppender.start();
    return rollingFileAppender;
}
 

private Appender buildDailyMaxRollingAppender(String name, String fileName, String pattern, int maxBackupIndex) {
    RollingFileAppender appender = new RollingFileAppender();
    appender.setName(name);
    appender.setAppend(true);
    appender.setFile(new File(getLogPath(), fileName).getAbsolutePath());

    TimeBasedRollingPolicy rolling = new TimeBasedRollingPolicy();
    rolling.setFileNamePattern(new File(getLogPath(), fileName).getAbsolutePath() + ".%d{yyyy-MM-dd-HH}");
    rolling.setMaxHistory(maxBackupIndex);
    rolling.setParent(appender);
    appender.setRollingPolicy(rolling);

    PatternLayoutEncoder layout = new PatternLayoutEncoder();
    layout.setPattern(pattern);
    layout.setCharset(Charset.forName(getEncoding()));
    appender.setEncoder(layout);
    // 启动
    appender.start();
    return appender;
}
 

/**
 * Initializer logback
 * 
 * @param file
 * @param level
 * @param maxHistory
 */
private void doInitializer(String file, String level, int maxHistory) {
	LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
	Logger rootLogger = loggerContext.getLogger(Logger.ROOT_LOGGER_NAME);
	rootLogger.detachAndStopAllAppenders();

	// appender
	RollingFileAppender<ILoggingEvent> fileAppender = new RollingFileAppender<ILoggingEvent>();
	fileAppender.setContext(loggerContext);
	fileAppender.setName("application");
	fileAppender.setFile(file);
	fileAppender.setAppend(true);

	// policy
	TimeBasedRollingPolicy<ILoggingEvent> policy = new TimeBasedRollingPolicy<ILoggingEvent>();
	policy.setContext(loggerContext);
	policy.setMaxHistory(maxHistory);
	policy.setFileNamePattern(file + ".%d{yyyy-MM-dd}");
	policy.setParent(fileAppender);
	policy.start();
	fileAppender.setRollingPolicy(policy);

	// encoder
	PatternLayoutEncoder encoder = new PatternLayoutEncoder();
	encoder.setContext(loggerContext);
	encoder.setPattern("%date [%thread] %-5level %logger (%file:%line\\) - %msg%n");
	encoder.start();
	fileAppender.setEncoder(encoder);
	
	fileAppender.start();

	rootLogger.addAppender(fileAppender);
	rootLogger.setLevel(Level.toLevel(level));
	rootLogger.setAdditive(false);
}
 

/**
 * Initializer logback
 * 
 * @param file
 * @param level
 * @param maxHistory
 */
private void doInitializer(String file, String level, int maxHistory) {
	LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
	Logger rootLogger = loggerContext.getLogger(Logger.ROOT_LOGGER_NAME);
	rootLogger.detachAndStopAllAppenders();

	// appender
	RollingFileAppender<ILoggingEvent> fileAppender = new RollingFileAppender<ILoggingEvent>();
	fileAppender.setContext(loggerContext);
	fileAppender.setName("application");
	fileAppender.setFile(file);
	fileAppender.setAppend(true);

	// policy
	TimeBasedRollingPolicy<ILoggingEvent> policy = new TimeBasedRollingPolicy<ILoggingEvent>();
	policy.setContext(loggerContext);
	policy.setMaxHistory(maxHistory);
	policy.setFileNamePattern(file + ".%d{yyyy-MM-dd}");
	policy.setParent(fileAppender);
	policy.start();
	fileAppender.setRollingPolicy(policy);

	// encoder
	PatternLayoutEncoder encoder = new PatternLayoutEncoder();
	encoder.setContext(loggerContext);
	encoder.setPattern("%date [%thread] %-5level %logger (%file:%line\\) - %msg%n");
	encoder.start();
	fileAppender.setEncoder(encoder);
	
	fileAppender.start();

	rootLogger.addAppender(fileAppender);
	rootLogger.setLevel(Level.toLevel(level));
	rootLogger.setAdditive(false);
}
 

/**
 * Create an appender that will roll over based on size
 *
 * @param context
 * @param encoder
 * @return An appender that matches the set up of the logger builder
 */
private RollingFileAppender<ILoggingEvent> createLogAppender(
    LoggerContext context, Encoder<ILoggingEvent> encoder) {
  RollingFileAppender<ILoggingEvent> appender = new RollingFileAppender<>();
  appender.setEncoder(encoder);
  appender.setFile(file);

  FixedWindowRollingPolicy rolling = new FixedWindowRollingPolicy();
  rolling.setParent(appender);
  rolling.setContext(context);

  // Set the maximum number of logs, either to the user specified setting or default to 1
  rolling.setMinIndex(1);
  if (maxNumberLogs.isPresent() && maxNumberLogs.get() >= 0) {
    rolling.setMaxIndex(maxNumberLogs.get());
  } else {
    rolling.setMaxIndex(1);
  }
  rolling.setFileNamePattern(getFileWithPattern("%i"));

  // Configure size based rolling
  SizeBasedTriggeringPolicy<ILoggingEvent> trigger = new SizeBasedTriggeringPolicy<>();
  trigger.setMaxFileSize(getMaxFileSize());
  trigger.setContext(context);

  rolling.start();
  trigger.start();
  appender.setRollingPolicy(rolling);
  appender.setTriggeringPolicy(trigger);

  return appender;
}
 

/**
 * Initializer logback
 * 
 * @param file
 * @param level
 * @param maxHistory
 */
private void doInitializer(String file, String level, int maxHistory) {
	LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
	Logger rootLogger = loggerContext.getLogger(Logger.ROOT_LOGGER_NAME);
	rootLogger.detachAndStopAllAppenders();

	// appender
	RollingFileAppender<ILoggingEvent> fileAppender = new RollingFileAppender<ILoggingEvent>();
	fileAppender.setContext(loggerContext);
	fileAppender.setName("application");
	fileAppender.setFile(file);
	fileAppender.setAppend(true);

	// policy
	TimeBasedRollingPolicy<ILoggingEvent> policy = new TimeBasedRollingPolicy<ILoggingEvent>();
	policy.setContext(loggerContext);
	policy.setMaxHistory(maxHistory);
	policy.setFileNamePattern(file + ".%d{yyyy-MM-dd}");
	policy.setParent(fileAppender);
	policy.start();
	fileAppender.setRollingPolicy(policy);

	// encoder
	PatternLayoutEncoder encoder = new PatternLayoutEncoder();
	encoder.setContext(loggerContext);
	encoder.setPattern("%date [%thread] %-5level %logger (%file:%line\\) - %msg%n");
	encoder.start();
	fileAppender.setEncoder(encoder);
	
	fileAppender.start();

	rootLogger.addAppender(fileAppender);
	rootLogger.setLevel(Level.toLevel(level));
	rootLogger.setAdditive(false);
}
 

/**
 * Create the basic thrift appender which logs to a file
 * and rolls the file when it exceeds a certain size.
 *
 * @param basePath base directory the files are under.
 * @param topic the topic name for the current appender.
 * @param rotateThresholdKBytes threshold in kilobytes to rotate after.
 * @param context the logback context.
 */
public static Appender<LogMessage> createFileRollingThriftAppender(
    File basePath,
    String topic,
    long rotateThresholdKBytes,
    Context context,
    int maxRetentionHours) {
  RollingFileAppender<LogMessage> appender = new RollingFileAppender<LogMessage>();
  appender.setContext(context);
  appender.setAppend(true);
  appender.setPrudent(false);

  LogMessageEncoder encoder = new LogMessageEncoder();
  appender.setEncoder(encoder);
  appender.setFile(basePath + PATH_SEP + topic);

  TimeBasedRollingPolicy policy = new TimeBasedRollingPolicy();
  policy.setMaxHistory(maxRetentionHours);
  policy.setFileNamePattern(basePath + PATH_SEP + topic + ".%d{yyyy-MM-dd-HH}.%i");
  policy.setCleanHistoryOnStart(false);
  policy.setContext(context);
  policy.setParent(appender);

  // Also impose a max size per file policy.
  SizeAndTimeBasedFNATP fnatp = new SizeAndTimeBasedFNATP();
  fnatp.setContext(context);
  fnatp.setTimeBasedRollingPolicy(policy);
  fnatp.setMaxFileSize(FileSize.valueOf(String.format("%sKB", rotateThresholdKBytes)));

  policy.setTimeBasedFileNamingAndTriggeringPolicy(fnatp);
  appender.setRollingPolicy(policy);
  appender.setTriggeringPolicy(policy);

  policy.start();
  appender.start();

  return appender;
}
 

/**
 * Initializer logback
 *
 * @param file
 * @param level
 * @param maxHistory
 */
private void doInitializer(String file, String level, int maxHistory) {
    LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
    Logger rootLogger = loggerContext.getLogger(Logger.ROOT_LOGGER_NAME);
    rootLogger.detachAndStopAllAppenders();

    // appender
    RollingFileAppender<ILoggingEvent> fileAppender = new RollingFileAppender<ILoggingEvent>();
    fileAppender.setContext(loggerContext);
    fileAppender.setName("application");
    fileAppender.setFile(file);
    fileAppender.setAppend(true);

    // policy
    TimeBasedRollingPolicy<ILoggingEvent> policy = new TimeBasedRollingPolicy<ILoggingEvent>();
    policy.setContext(loggerContext);
    policy.setMaxHistory(maxHistory);
    policy.setFileNamePattern(file + ".%d{yyyy-MM-dd}");
    policy.setParent(fileAppender);
    policy.start();
    fileAppender.setRollingPolicy(policy);

    // encoder
    PatternLayoutEncoder encoder = new PatternLayoutEncoder();
    encoder.setContext(loggerContext);
    encoder.setPattern("%date [%thread] %-5level %logger (%file:%line\\) - %msg%n");
    encoder.start();
    fileAppender.setEncoder(encoder);

    fileAppender.start();

    rootLogger.addAppender(fileAppender);
    rootLogger.setLevel(Level.toLevel(level));
    rootLogger.setAdditive(false);
}
 

public static void configureRollingFileAppender(FileLoggerSettings fileLoggerSettings,
                                                Context loggerContext,
                                                RollingFileAppender<ILoggingEvent> appender)
{
    String fileName = fileLoggerSettings.getFileName();
    File file = new File(fileName);
    if (file.getParentFile() != null)
    {
        file.getParentFile().mkdirs();
    }
    validateLogFilePermissions(file);
    validateMaxFileSize(fileLoggerSettings.getMaxFileSize());

    appender.setFile(fileName);
    appender.setAppend(true);
    appender.setContext(loggerContext);

    TriggeringPolicy triggeringPolicy;
    RollingPolicyBase rollingPolicy;
    final String maxFileSizeAsString = String.valueOf(fileLoggerSettings.getMaxFileSize()) + "MB";
    if(fileLoggerSettings.isRollDaily())
    {
        DailyTriggeringPolicy dailyTriggeringPolicy = new DailyTriggeringPolicy(fileLoggerSettings.isRollOnRestart(), maxFileSizeAsString);
        dailyTriggeringPolicy.setContext(loggerContext);
        TimeBasedRollingPolicy<ILoggingEvent> timeBasedRollingPolicy = new TimeBasedRollingPolicy<>();
        timeBasedRollingPolicy.setMaxHistory(fileLoggerSettings.getMaxHistory());
        timeBasedRollingPolicy.setTimeBasedFileNamingAndTriggeringPolicy(dailyTriggeringPolicy);
        timeBasedRollingPolicy.setFileNamePattern(fileName + ".%d{yyyy-MM-dd}.%i" + (fileLoggerSettings.isCompressOldFiles()
                ? ".gz"
                : ""));
        rollingPolicy = timeBasedRollingPolicy;
        triggeringPolicy = dailyTriggeringPolicy;
    }
    else
    {
        SizeTriggeringPolicy sizeTriggeringPolicy = new SizeTriggeringPolicy(fileLoggerSettings.isRollOnRestart(), maxFileSizeAsString);
        sizeTriggeringPolicy.setContext(loggerContext);
        SimpleRollingPolicy simpleRollingPolicy = new SimpleRollingPolicy(fileLoggerSettings.getMaxHistory());
        simpleRollingPolicy.setFileNamePattern(fileName + ".%i" + (fileLoggerSettings.isCompressOldFiles() ? ".gz" : ""));
        rollingPolicy = simpleRollingPolicy;
        triggeringPolicy = sizeTriggeringPolicy;
    }

    rollingPolicy.setContext(loggerContext);
    RollingPolicyDecorator decorator = new RollingPolicyDecorator(rollingPolicy, fileLoggerSettings.getRolloverListener(), fileLoggerSettings.getExecutorService());
    decorator.setParent(appender);
    appender.setRollingPolicy(decorator);
    appender.setTriggeringPolicy(triggeringPolicy);
    decorator.start();
    triggeringPolicy.start();

    final PatternLayoutEncoder encoder = new PatternLayoutEncoder();
    encoder.setPattern(fileLoggerSettings.getLayout());
    encoder.setContext(loggerContext);
    encoder.start();
    appender.setEncoder(encoder);
}
 

private static void initLogs() {
    Logger logbackLogger = (ch.qos.logback.classic.Logger) LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME);
    LoggerContext lc = logbackLogger.getLoggerContext();

    Logger rootLogger = lc.getLogger(Logger.ROOT_LOGGER_NAME);
    rootLogger.detachAndStopAllAppenders();

    TimeBasedRollingPolicy<ILoggingEvent> rollingPolicy = new TimeBasedRollingPolicy<ILoggingEvent>();
    rollingPolicy.setMaxHistory(3);
    SizeAndTimeBasedFNATP<ILoggingEvent> sizeAndTimeBasedFNATP = new SizeAndTimeBasedFNATP<ILoggingEvent>();
    sizeAndTimeBasedFNATP.setMaxFileSize("2MB");
    rollingPolicy.setTimeBasedFileNamingAndTriggeringPolicy(sizeAndTimeBasedFNATP);
    rollingPolicy.setFileNamePattern(context.getFilesDir().getPath() + "/logs/old/flickruploader.%d{yyyy-MM-dd}.%i.log");
    rollingPolicy.setContext(lc);

    RollingFileAppender<ILoggingEvent> fileAppender = new RollingFileAppender<ILoggingEvent>();
    fileAppender.setContext(lc);
    fileAppender.setFile(getLogFilePath());
    fileAppender.setRollingPolicy(rollingPolicy);
    fileAppender.setTriggeringPolicy(rollingPolicy);
    rollingPolicy.setParent(fileAppender);

    PatternLayoutEncoder pl = new PatternLayoutEncoder();
    pl.setContext(lc);
    pl.setCharset(Charset.defaultCharset());
    pl.setPattern("%d{HH:mm:ss.SSS} [%thread] %-5level %class{0}.%method:%L > %msg%n");
    pl.setImmediateFlush(false);
    pl.start();

    fileAppender.setEncoder(pl);
    fileAppender.setName("file");

    rollingPolicy.start();
    fileAppender.start();

    if (Config.isDebug()) {
        final PatternLayoutEncoder logcatTagPattern = new PatternLayoutEncoder();
        logcatTagPattern.setContext(lc);
        logcatTagPattern.setPattern("%class{0}");
        logcatTagPattern.start();

        final PatternLayoutEncoder logcatPattern = new PatternLayoutEncoder();
        logcatPattern.setContext(lc);
        logcatPattern.setPattern("[%thread] %method:%L > %msg%n");
        logcatPattern.start();

        final LogcatAppender logcatAppender = new LogcatAppender();
        logcatAppender.setContext(lc);
        logcatAppender.setTagEncoder(logcatTagPattern);
        logcatAppender.setEncoder(logcatPattern);
        logcatAppender.start();

        rootLogger.addAppender(logcatAppender);
    }

    rootLogger.addAppender(fileAppender);

}
 

private void initLogging() {
    final File logDir = getLogDir();
    final File logFile = new File(logDir, "bitherj.log");
    final LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
    final PatternLayoutEncoder filePattern = new PatternLayoutEncoder();
    filePattern.setContext(context);
    filePattern.setPattern("%d{HH:mm:ss.SSS} [%thread] %logger{0} - %msg%n");
    filePattern.start();

    final RollingFileAppender<ILoggingEvent> fileAppender = new
            RollingFileAppender<ILoggingEvent>();
    fileAppender.setContext(context);
    fileAppender.setFile(logFile.getAbsolutePath());

    final TimeBasedRollingPolicy<ILoggingEvent> rollingPolicy = new
            TimeBasedRollingPolicy<ILoggingEvent>();
    rollingPolicy.setContext(context);
    rollingPolicy.setParent(fileAppender);
    rollingPolicy.setFileNamePattern(logDir.getAbsolutePath() + "/bitherj.%d.log.gz");
    rollingPolicy.setMaxHistory(7);
    rollingPolicy.start();

    fileAppender.setEncoder(filePattern);
    fileAppender.setRollingPolicy(rollingPolicy);
    fileAppender.start();

    final PatternLayoutEncoder logcatTagPattern = new PatternLayoutEncoder();
    logcatTagPattern.setContext(context);
    logcatTagPattern.setPattern("%logger{0}");
    logcatTagPattern.start();

    final PatternLayoutEncoder logcatPattern = new PatternLayoutEncoder();
    logcatPattern.setContext(context);
    logcatPattern.setPattern("[%thread] %msg%n");
    logcatPattern.start();

    final LogcatAppender logcatAppender = new LogcatAppender();
    logcatAppender.setContext(context);
    logcatAppender.setTagEncoder(logcatTagPattern);
    logcatAppender.setEncoder(logcatPattern);
    logcatAppender.start();

    final ch.qos.logback.classic.Logger log = context.getLogger(Logger.ROOT_LOGGER_NAME);
    log.addAppender(fileAppender);
    log.addAppender(logcatAppender);
    log.setLevel(Level.INFO);
}
 

/**
 * 通过传入的名字和级别，动态设置appender
 *
 * @param fileName
 * @return
 */
@SuppressWarnings("unchecked")
public static RollingFileAppender getAppender(String fileName, Level level){
    String rootPath = PROJECT_PATH;
    if(!rootPath.endsWith(File.separator)){
        rootPath += File.separator;
    }
    if(fileName.startsWith(File.separator)){
        fileName = fileName.substring(1);
    }
    LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
    RollingFileAppender appender = new RollingFileAppender();
    /*设置上下文，每个logger都关联到logger上下文，默认上下文名称为default。
    但可以使用<contextName>设置成其他名字，用于区分不同应用程序的记录。一旦设置，不能修改。*/
    appender.setContext(context);

    //这里设置级别过滤器
    LogFilter levelController = new LogFilter();
    ThresholdFilter levelFilter = levelController.getThresholdFilter(level);
    levelFilter.start();
    appender.addFilter(levelFilter);

    //设置文件名
    appender.setFile(OptionHelper.substVars(rootPath+fileName + ".log",context));
    appender.setAppend(true);
    appender.setPrudent(false);
    //设置文件创建时间及大小的类
    SizeAndTimeBasedRollingPolicy policy = new SizeAndTimeBasedRollingPolicy();
    //文件名格式
    String fp = OptionHelper.substVars(rootPath+ fileName + ".%d{yyyy-MM-dd}.%i.zip",context);
    //最大日志文件大小
    policy.setMaxFileSize(FileSize.valueOf("100MB"));
    //设置文件名模式
    policy.setFileNamePattern(fp);
    //设置保存最近3天的日志
    policy.setMaxHistory(3);
    //总大小限制
    policy.setContext(context);
    policy.setTotalSizeCap(FileSize.valueOf("1GB"));
    //设置父节点是appender
    policy.setParent(appender);
    //设置上下文，每个logger都关联到logger上下文，默认上下文名称为default。
    //但可以使用<contextName>设置成其他名字，用于区分不同应用程序的记录。一旦设置，不能修改。
    policy.start();
    PatternLayoutEncoder encoder = new PatternLayoutEncoder();
    //设置上下文，每个logger都关联到logger上下文，默认上下文名称为default。
    //但可以使用<contextName>设置成其他名字，用于区分不同应用程序的记录。一旦设置，不能修改。
    encoder.setContext(context);
    //设置格式
    /*encoder.setPattern("%d{yyyy-MM-dd HH:mm:ss.SSS} %5p [%t] %replace(%caller{1}){'\\t|Caller.{1}0|\\r\\n', ''} - %msg%n");*/
    encoder.setPattern("%d %p [%t] - %msg%n");
    encoder.start();
    //加入下面两个节点
    appender.setRollingPolicy(policy);
    appender.setEncoder(encoder);
    appender.start();
    return appender;
}
 

private static List<Appender<ILoggingEvent>> constructAppenders(
        boolean shouldLogToFile, String _logDirectory) {
    List<Appender<ILoggingEvent>> appenders = new ArrayList<>();

    String logDirectory = DEFAULT_LOG_DIR;
    if (_logDirectory != null && !_logDirectory.trim().isEmpty()) logDirectory = _logDirectory;

    PatternLayoutEncoder encoder = new PatternLayoutEncoder();
    encoder.setContext(context);
    encoder.setPattern(DEFAULT_LOG_PATTERN);
    encoder.start();

    ConsoleAppender<ILoggingEvent> consoleSync = new ConsoleAppender<>();
    consoleSync.setContext(context);
    consoleSync.setName("consoleSyncAppender"); // for logger debugging
    consoleSync.setEncoder(encoder);
    consoleSync.start();

    AsyncAppender consoleAsync = new AsyncAppender();
    consoleAsync.setContext(context);
    consoleAsync.setName("consoleAsyncAppender"); // for logger debugging
    consoleAsync.addAppender(consoleSync);

    consoleAsync.setIncludeCallerData(ASYNC_LOGGER_INCLUDE_CALLER_DATA);
    consoleAsync.setNeverBlock(ASYNC_LOGGER_NEVER_BLOCK);
    consoleAsync.setMaxFlushTime(ASYNC_LOGGER_MAX_FLUSH_TIME_MS);
    consoleAsync.setDiscardingThreshold(ASYNC_LOGGER_DISCARDING_THRESHOLD);
    consoleAsync.setQueueSize(ASYNC_LOGGER_QUEUE_SIZE);
    consoleAsync.start();

    appenders.add(consoleAsync);
    if (!shouldLogToFile) return appenders;

    RollingFileAppender<ILoggingEvent> fileSync = new RollingFileAppender<>();

    SizeBasedTriggeringPolicy<ILoggingEvent> tp = new SizeBasedTriggeringPolicy<>();
    tp.setContext(context);
    tp.start();

    SizeAndTimeBasedRollingPolicy rp = new SizeAndTimeBasedRollingPolicy();
    rp.setContext(context);
    // roll-over each day
    // notice that we don't use the OS-agnostic File.separator here since logback is converts
    // the FileNamePattern
    // to a unix-style path using ch.qos.logback.core.rolling.helper.FileFilterUtil.slashify
    FileNamePattern fnp =
            new FileNamePattern(
                    logDirectory + "/%d{yyyy/MM, aux}/aion.%d{yyyy-MM-dd}.%i.log", context);
    rp.setFileNamePattern(fnp.getPattern());
    // max rollover file size = 100MB
    rp.setMaxFileSize(FileSize.valueOf("100mb"));
    rp.setParent(fileSync);
    rp.start();

    fileSync.setName("fileSyncAppender"); // for logger debugging
    fileSync.setContext(context);
    fileSync.setTriggeringPolicy(tp);
    fileSync.setRollingPolicy(rp);
    fileSync.setFile(logDirectory + File.separator + DEFAULT_LOG_FILE_CURRENT);
    fileSync.setEncoder(encoder);
    fileSync.setAppend(true);
    fileSync.start();

    AsyncAppender fileAsync = new AsyncAppender();
    fileAsync.setContext(context);
    fileAsync.setName("fileAsyncAppender"); // for logger debugging
    fileAsync.addAppender(fileSync);

    fileAsync.setIncludeCallerData(ASYNC_LOGGER_INCLUDE_CALLER_DATA);
    fileAsync.setNeverBlock(ASYNC_LOGGER_NEVER_BLOCK);
    fileAsync.setMaxFlushTime(ASYNC_LOGGER_MAX_FLUSH_TIME_MS);
    fileAsync.setDiscardingThreshold(ASYNC_LOGGER_DISCARDING_THRESHOLD);
    fileAsync.setQueueSize(ASYNC_LOGGER_QUEUE_SIZE);
    fileAsync.start();

    appenders.add(fileAsync);
    return appenders;
}
 

private void setupFileAppender(LoggerContext loggerContext) {
	RollingFileAppender<ILoggingEvent> fa = new RollingFileAppender<ILoggingEvent>();
	fa.setFile(PlatformUtil.getWritableLocationForFile("errors.log"));
	
	SizeBasedTriggeringPolicy<ILoggingEvent> sizePolicy = new SizeBasedTriggeringPolicy<ILoggingEvent>();
	sizePolicy.setContext(loggerContext);
	sizePolicy.setMaxFileSize(FileSize.valueOf("10mb"));
	sizePolicy.start();
	fa.setTriggeringPolicy(sizePolicy);
	var policy = new FixedWindowRollingPolicy();
	policy.setMaxIndex(3);
	policy.setMinIndex(1);
	policy.setFileNamePattern("errors.%i.log.zip");
	policy.setParent(fa);
	policy.setContext(loggerContext);
	policy.start();
	fa.setRollingPolicy(policy);
	
	
	fa.setContext(loggerContext);
	fa.setName("FILE");
	
	var filter = new ThresholdFilter();
	filter.setLevel("ERROR");
	filter.start();
	fa.addFilter(filter);

	LayoutWrappingEncoder<ILoggingEvent> encoder = new LayoutWrappingEncoder<ILoggingEvent>();
	encoder.setContext(loggerContext);

	// same as
	// PatternLayout layout = new PatternLayout();
	// layout.setPattern("%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n");
	PatternLayout layout = new PatternLayout();
	layout.setPattern("%date %level [%thread] %logger{10} [%file:%line] %msg%n");

	layout.setContext(loggerContext);
	layout.start();
	encoder.setLayout(layout);
	fa.setEncoder(encoder);

	
	fa.start();

	Logger rootLogger = loggerContext.getLogger(Logger.ROOT_LOGGER_NAME);
	rootLogger.addAppender(fa);
}
 

public static void setup(String fileName) {
    LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();

    RollingFileAppender<ILoggingEvent> appender = new RollingFileAppender<>();
    appender.setContext(loggerContext);
    appender.setFile(fileName + ".log");

    FixedWindowRollingPolicy rollingPolicy = new FixedWindowRollingPolicy();
    rollingPolicy.setContext(loggerContext);
    rollingPolicy.setParent(appender);
    rollingPolicy.setFileNamePattern(fileName + "_%i.log");
    rollingPolicy.setMinIndex(1);
    rollingPolicy.setMaxIndex(10);
    rollingPolicy.start();

    SizeBasedTriggeringPolicy<ILoggingEvent> triggeringPolicy = new SizeBasedTriggeringPolicy<>();
    triggeringPolicy.setMaxFileSize(FileSize.valueOf("10MB"));
    triggeringPolicy.start();

    PatternLayoutEncoder encoder = new PatternLayoutEncoder();
    encoder.setContext(loggerContext);
    encoder.setPattern("%d{MMM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{15}: %msg %xEx%n");
    encoder.start();

    appender.setEncoder(encoder);
    appender.setRollingPolicy(rollingPolicy);
    appender.setTriggeringPolicy(triggeringPolicy);
    appender.start();

    logbackLogger = loggerContext.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME);
    logbackLogger.addAppender(appender);
    logbackLogger.setLevel(Level.INFO);

    // log errors in separate file
    // not working as expected still.... damn logback...
   /* FileAppender errorAppender = new FileAppender();
    errorAppender.setEncoder(encoder);
    errorAppender.setName("Error");
    errorAppender.setContext(loggerContext);
    errorAppender.setFile(fileName + "_error.log");
    LevelFilter levelFilter = new LevelFilter();
    levelFilter.setLevel(Level.ERROR);
    levelFilter.setOnMatch(FilterReply.ACCEPT);
    levelFilter.setOnMismatch(FilterReply.DENY);
    levelFilter.start();
    errorAppender.addFilter(levelFilter);
    errorAppender.start();
    logbackLogger.addAppender(errorAppender);*/
}
 

public RollingFileAppender getAppender(String name, Level level, String fileName) {
    DateFormat format = DateFormat.getDateInstance(DateFormat.MEDIUM, Locale.SIMPLIFIED_CHINESE);
    LoggerContext context = (LoggerContext)LoggerFactory.getILoggerFactory();

    RollingFileAppender appender = new RollingFileAppender();

    LevelFilter levelFilter = getLevelFilter(level);
    levelFilter.start();
    appender.addFilter(levelFilter);

    appender.setContext(context);

    appender.setName(name);

    appender.setFile(OptionHelper.substVars("/opt/app/logs/" + fileName + ".json", context));

    appender.setAppend(true);

    appender.setPrudent(false);

    SizeAndTimeBasedRollingPolicy policy = new SizeAndTimeBasedRollingPolicy();

    String fp = OptionHelper.substVars(
        "/opt/app/logs/histroy" + fileName + format.format(new Date()) + "/.%d{yyyy-MM-dd}.%i.json", context);

    policy.setMaxFileSize(FileSize.valueOf("128MB"));

    policy.setFileNamePattern(fp);

    policy.setMaxHistory(7);

    policy.setTotalSizeCap(FileSize.valueOf("32GB"));

    policy.setParent(appender);

    policy.setContext(context);
    policy.start();

    PatternLayoutEncoder encoder = new PatternLayoutEncoder();

    encoder.setContext(context);

    encoder.setPattern("%d %p (%file:%line\\)- %m%n");
    encoder.start();

    appender.setRollingPolicy(policy);
    appender.setEncoder(encoder);
    appender.start();
    return appender;
}