Package org.apache.commons.logging.impl

Class SimpleLog

  • All Implemented Interfaces:
    Serializable, Log
    public class SimpleLog
extends Object
implements Log, Serializable
    Simple implementation of Log that sends all enabled log messages, for all defined loggers, to System.err. The following system properties are supported to configure the behavior of this logger:
    • org.apache.commons.logging.simplelog.defaultlog - Default org.apache.commons.logging detail level for all instances of SimpleLog. Must be one of ("trace", "debug", "info", "warn", "error", or "fatal"). If not specified, defaults to "info".
    • org.apache.commons.logging.simplelog.log.xxxxx - Logging detail level for a SimpleLog instance named "xxxxx". Must be one of ("trace", "debug", "info", "warn", "error", or "fatal"). If not specified, the default org.apache.commons.logging detail level is used.
    • org.apache.commons.logging.simplelog.showlogname - Set to true if you want the Log instance name to be included in output messages. Defaults to false.
    • org.apache.commons.logging.simplelog.showShortLogname - Set to true if you want the last component of the name to be included in output messages. Defaults to true.
    • org.apache.commons.logging.simplelog.showdatetime - Set to true if you want the current date and time to be included in output messages. Default is false.
    • org.apache.commons.logging.simplelog.dateTimeFormat - The date and time format to be used in the output messages. The pattern describing the date and time format is the same that is used in java.text.SimpleDateFormat. If the format is not specified or is invalid, the default format is used. The default format is yyyy/MM/dd HH:mm:ss:SSS zzz.

    In addition to looking for system properties with the names specified above, this implementation also checks for a class loader resource named "simplelog.properties", and includes any matching definitions from this resource (if it exists).

    Version:
    $Id: SimpleLog.java 1435115 2013-01-18 12:40:19Z tn $
    See Also:
    Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      SimpleLog​(String name)
      Construct a simple log with given name.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void debug​(Object message)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_DEBUG.
      void debug​(Object message, Throwable t)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_DEBUG.
      void error​(Object message)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_ERROR.
      void error​(Object message, Throwable t)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_ERROR.
      void fatal​(Object message)
      Log a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_FATAL.
      void fatal​(Object message, Throwable t)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_FATAL.
      int getLevel()
      Get org.apache.commons.logging level.
      void info​(Object message)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_INFO.
      void info​(Object message, Throwable t)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_INFO.
      boolean isDebugEnabled()
      Are debug messages currently enabled?
      boolean isErrorEnabled()
      Are error messages currently enabled?
      boolean isFatalEnabled()
      Are fatal messages currently enabled?
      boolean isInfoEnabled()
      Are info messages currently enabled?
      protected boolean isLevelEnabled​(int logLevel)
      Is the given log level currently enabled?
      boolean isTraceEnabled()
      Are trace messages currently enabled?
      boolean isWarnEnabled()
      Are warn messages currently enabled?
      protected void log​(int type, Object message, Throwable t)
      Do the actual org.apache.commons.logging.
      void setLevel​(int currentLogLevel)
      Set org.apache.commons.logging level.
      void trace​(Object message)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_TRACE.
      void trace​(Object message, Throwable t)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_TRACE.
      void warn​(Object message)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_WARN.
      void warn​(Object message, Throwable t)
      Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_WARN.
      protected void write​(StringBuffer buffer)
      Write the content of the message accumulated in the specified StringBuffer to the appropriate output destination.

    • Field Detail

      • systemPrefix

        protected static final String systemPrefix
        All system properties used by SimpleLog start with this
        See Also:
        Constant Field Values

      • simpleLogProps

        protected static final Properties simpleLogProps
        Properties loaded from simplelog.properties

      • DEFAULT_DATE_TIME_FORMAT

        protected static final String DEFAULT_DATE_TIME_FORMAT
        The default format to use when formating dates
        See Also:
        Constant Field Values

      • showLogName

        protected static volatile boolean showLogName
        Include the instance name in the log message?

      • showShortName

        protected static volatile boolean showShortName
        Include the short name ( last component ) of the logger in the log message. Defaults to true - otherwise we'll be lost in a flood of messages without knowing who sends them.

      • showDateTime

        protected static volatile boolean showDateTime
        Include the current time in the log message

      • dateTimeFormat

        protected static volatile String dateTimeFormat
        The date and time format to use in the log message

      • dateFormatter

        protected static DateFormat dateFormatter
        Used to format times.

        Any code that accesses this object should first obtain a lock on it, ie use synchronized(dateFormatter); this requirement was introduced in 1.1.1 to fix an existing thread safety bug (SimpleDateFormat.format is not thread-safe).

      • LOG_LEVEL_TRACE

        public static final int LOG_LEVEL_TRACE
        "Trace" level org.apache.commons.logging.
        See Also:
        Constant Field Values

      • LOG_LEVEL_DEBUG

        public static final int LOG_LEVEL_DEBUG
        "Debug" level org.apache.commons.logging.
        See Also:
        Constant Field Values

      • LOG_LEVEL_INFO

        public static final int LOG_LEVEL_INFO
        "Info" level org.apache.commons.logging.
        See Also:
        Constant Field Values

      • LOG_LEVEL_WARN

        public static final int LOG_LEVEL_WARN
        "Warn" level org.apache.commons.logging.
        See Also:
        Constant Field Values

      • LOG_LEVEL_ERROR

        public static final int LOG_LEVEL_ERROR
        "Error" level org.apache.commons.logging.
        See Also:
        Constant Field Values

      • LOG_LEVEL_FATAL

        public static final int LOG_LEVEL_FATAL
        "Fatal" level org.apache.commons.logging.
        See Also:
        Constant Field Values

      • LOG_LEVEL_ALL

        public static final int LOG_LEVEL_ALL
        Enable all org.apache.commons.logging levels
        See Also:
        Constant Field Values

      • LOG_LEVEL_OFF

        public static final int LOG_LEVEL_OFF
        Enable no org.apache.commons.logging levels
        See Also:
        Constant Field Values

      • logName

        protected volatile String logName
        The name of this simple log instance

      • currentLogLevel

        protected volatile int currentLogLevel
        The current log level

    • Constructor Detail

      • SimpleLog

        public SimpleLog​(String name)
        Construct a simple log with given name.
        Parameters:
        name - log name

    • Method Detail

      • setLevel

        public void setLevel​(int currentLogLevel)
        Set org.apache.commons.logging level.
        Parameters:
        currentLogLevel - new org.apache.commons.logging level

      • getLevel

        public int getLevel()
        Get org.apache.commons.logging level.

      • log

        protected void log​(int type,
                   Object message,
                   Throwable t)
        Do the actual org.apache.commons.logging.

        This method assembles the message and then calls write() to cause it to be written.

        Parameters:
        type - One of the LOG_LEVEL_XXX constants defining the log level
        message - The message itself (typically a String)
        t - The exception whose stack trace should be logged

      • write

        protected void write​(StringBuffer buffer)
        Write the content of the message accumulated in the specified StringBuffer to the appropriate output destination. The default implementation writes to System.err.
        Parameters:
        buffer - A StringBuffer containing the accumulated text to be logged

      • isLevelEnabled

        protected boolean isLevelEnabled​(int logLevel)
        Is the given log level currently enabled?
        Parameters:
        logLevel - is this level enabled?

      • debug

        public final void debug​(Object message)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_DEBUG.
        Specified by:
        debug in interface Log
        Parameters:
        message - to log
        See Also:
        Log.debug(Object)

      • debug

        public final void debug​(Object message,
                        Throwable t)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_DEBUG.
        Specified by:
        debug in interface Log
        Parameters:
        message - to log
        t - log this cause
        See Also:
        Log.debug(Object, Throwable)

      • trace

        public final void trace​(Object message)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_TRACE.
        Specified by:
        trace in interface Log
        Parameters:
        message - to log
        See Also:
        Log.trace(Object)

      • trace

        public final void trace​(Object message,
                        Throwable t)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_TRACE.
        Specified by:
        trace in interface Log
        Parameters:
        message - to log
        t - log this cause
        See Also:
        Log.trace(Object, Throwable)

      • info

        public final void info​(Object message)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_INFO.
        Specified by:
        info in interface Log
        Parameters:
        message - to log
        See Also:
        Log.info(Object)

      • info

        public final void info​(Object message,
                       Throwable t)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_INFO.
        Specified by:
        info in interface Log
        Parameters:
        message - to log
        t - log this cause
        See Also:
        Log.info(Object, Throwable)

      • warn

        public final void warn​(Object message)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_WARN.
        Specified by:
        warn in interface Log
        Parameters:
        message - to log
        See Also:
        Log.warn(Object)

      • warn

        public final void warn​(Object message,
                       Throwable t)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_WARN.
        Specified by:
        warn in interface Log
        Parameters:
        message - to log
        t - log this cause
        See Also:
        Log.warn(Object, Throwable)

      • error

        public final void error​(Object message)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_ERROR.
        Specified by:
        error in interface Log
        Parameters:
        message - to log
        See Also:
        Log.error(Object)

      • error

        public final void error​(Object message,
                        Throwable t)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_ERROR.
        Specified by:
        error in interface Log
        Parameters:
        message - to log
        t - log this cause
        See Also:
        Log.error(Object, Throwable)

      • fatal

        public final void fatal​(Object message)
        Log a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_FATAL.
        Specified by:
        fatal in interface Log
        Parameters:
        message - to log
        See Also:
        Log.fatal(Object)

      • fatal

        public final void fatal​(Object message,
                        Throwable t)
        Logs a message with org.apache.commons.logging.impl.SimpleLog.LOG_LEVEL_FATAL.
        Specified by:
        fatal in interface Log
        Parameters:
        message - to log
        t - log this cause
        See Also:
        Log.fatal(Object, Throwable)

      • isDebugEnabled

        public final boolean isDebugEnabled()
        Are debug messages currently enabled?

        This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

        Specified by:
        isDebugEnabled in interface Log
        Returns:
        true if debug is enabled in the underlying logger.

      • isErrorEnabled

        public final boolean isErrorEnabled()
        Are error messages currently enabled?

        This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

        Specified by:
        isErrorEnabled in interface Log
        Returns:
        true if error is enabled in the underlying logger.

      • isFatalEnabled

        public final boolean isFatalEnabled()
        Are fatal messages currently enabled?

        This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

        Specified by:
        isFatalEnabled in interface Log
        Returns:
        true if fatal is enabled in the underlying logger.

      • isInfoEnabled

        public final boolean isInfoEnabled()
        Are info messages currently enabled?

        This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

        Specified by:
        isInfoEnabled in interface Log
        Returns:
        true if info is enabled in the underlying logger.

      • isTraceEnabled

        public final boolean isTraceEnabled()
        Are trace messages currently enabled?

        This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

        Specified by:
        isTraceEnabled in interface Log
        Returns:
        true if trace is enabled in the underlying logger.

      • isWarnEnabled

        public final boolean isWarnEnabled()
        Are warn messages currently enabled?

        This allows expensive operations such as String concatenation to be avoided when the message will be ignored by the logger.

        Specified by:
        isWarnEnabled in interface Log
        Returns:
        true if warn is enabled in the underlying logger.