IT. Expert System.

Java Standard Edition (SE)

LogRecord


compact1, compact2, compact3
java.util.logging

Class LogRecord

  • All Implemented Interfaces:
    Serializable


    public class LogRecord
    extends Object
    implements Serializable
    LogRecord objects are used to pass logging requests between the logging framework and individual log Handlers.

    When a LogRecord is passed into the logging framework it logically belongs to the framework and should no longer be used or updated by the client application.

    Note that if the client application has not specified an explicit source method name and source class name, then the LogRecord class will infer them automatically when they are first accessed (due to a call on getSourceMethodName or getSourceClassName) by analyzing the call stack. Therefore, if a logging Handler wants to pass off a LogRecord to another thread, or to transmit it over RMI, and if it wishes to subsequently obtain method name or class name information it should call one of getSourceClassName or getSourceMethodName to force the values to be filled in.

    Serialization notes:

    • The LogRecord class is serializable.
    • Because objects in the parameters array may not be serializable, during serialization all objects in the parameters array are written as the corresponding Strings (using Object.toString).
    • The ResourceBundle is not transmitted as part of the serialized form, but the resource bundle name is, and the recipient object's readObject method will attempt to locate a suitable resource bundle.
    Since:
    1.4
    See Also:
    Serialized Form
    • Constructor Detail

      • LogRecord

        public LogRecord(Level level,
                         String msg)
        Construct a LogRecord with the given level and message values.

        The sequence property will be initialized with a new unique value. These sequence values are allocated in increasing order within a VM.

        The millis property will be initialized to the current time.

        The thread ID property will be initialized with a unique ID for the current thread.

        All other properties will be initialized to "null".

        Parameters:
        level - a logging level value
        msg - the raw non-localized logging message (may be null)
    • Method Detail

      • getLoggerName

        public String getLoggerName()
        Get the source Logger's name.
        Returns:
        source logger name (may be null)
      • setLoggerName

        public void setLoggerName(String name)
        Set the source Logger's name.
        Parameters:
        name - the source logger name (may be null)
      • getResourceBundle

        public ResourceBundle getResourceBundle()
        Get the localization resource bundle

        This is the ResourceBundle that should be used to localize the message string before formatting it. The result may be null if the message is not localizable, or if no suitable ResourceBundle is available.

        Returns:
        the localization resource bundle
      • setResourceBundle

        public void setResourceBundle(ResourceBundle bundle)
        Set the localization resource bundle.
        Parameters:
        bundle - localization bundle (may be null)
      • getResourceBundleName

        public String getResourceBundleName()
        Get the localization resource bundle name

        This is the name for the ResourceBundle that should be used to localize the message string before formatting it. The result may be null if the message is not localizable.

        Returns:
        the localization resource bundle name
      • setResourceBundleName

        public void setResourceBundleName(String name)
        Set the localization resource bundle name.
        Parameters:
        name - localization bundle name (may be null)
      • getLevel

        public Level getLevel()
        Get the logging message level, for example Level.SEVERE.
        Returns:
        the logging message level
      • setLevel

        public void setLevel(Level level)
        Set the logging message level, for example Level.SEVERE.
        Parameters:
        level - the logging message level
      • getSequenceNumber

        public long getSequenceNumber()
        Get the sequence number.

        Sequence numbers are normally assigned in the LogRecord constructor, which assigns unique sequence numbers to each new LogRecord in increasing order.

        Returns:
        the sequence number
      • setSequenceNumber

        public void setSequenceNumber(long seq)
        Set the sequence number.

        Sequence numbers are normally assigned in the LogRecord constructor, so it should not normally be necessary to use this method.

        Parameters:
        seq - the sequence number
      • getSourceClassName

        public String getSourceClassName()
        Get the name of the class that (allegedly) issued the logging request.

        Note that this sourceClassName is not verified and may be spoofed. This information may either have been provided as part of the logging call, or it may have been inferred automatically by the logging framework. In the latter case, the information may only be approximate and may in fact describe an earlier call on the stack frame.

        May be null if no information could be obtained.

        Returns:
        the source class name
      • setSourceClassName

        public void setSourceClassName(String sourceClassName)
        Set the name of the class that (allegedly) issued the logging request.
        Parameters:
        sourceClassName - the source class name (may be null)
      • getSourceMethodName

        public String getSourceMethodName()
        Get the name of the method that (allegedly) issued the logging request.

        Note that this sourceMethodName is not verified and may be spoofed. This information may either have been provided as part of the logging call, or it may have been inferred automatically by the logging framework. In the latter case, the information may only be approximate and may in fact describe an earlier call on the stack frame.

        May be null if no information could be obtained.

        Returns:
        the source method name
      • setSourceMethodName

        public void setSourceMethodName(String sourceMethodName)
        Set the name of the method that (allegedly) issued the logging request.
        Parameters:
        sourceMethodName - the source method name (may be null)
      • getMessage

        public String getMessage()
        Get the "raw" log message, before localization or formatting.

        May be null, which is equivalent to the empty string "".

        This message may be either the final text or a localization key.

        During formatting, if the source logger has a localization ResourceBundle and if that ResourceBundle has an entry for this message string, then the message string is replaced with the localized value.

        Returns:
        the raw message string
      • setMessage

        public void setMessage(String message)
        Set the "raw" log message, before localization or formatting.
        Parameters:
        message - the raw message string (may be null)
      • getParameters

        public Object[] getParameters()
        Get the parameters to the log message.
        Returns:
        the log message parameters. May be null if there are no parameters.
      • setParameters

        public void setParameters(Object[] parameters)
        Set the parameters to the log message.
        Parameters:
        parameters - the log message parameters. (may be null)
      • getThreadID

        public int getThreadID()
        Get an identifier for the thread where the message originated.

        This is a thread identifier within the Java VM and may or may not map to any operating system ID.

        Returns:
        thread ID
      • setThreadID

        public void setThreadID(int threadID)
        Set an identifier for the thread where the message originated.
        Parameters:
        threadID - the thread ID
      • getMillis

        public long getMillis()
        Get event time in milliseconds since 1970.
        Returns:
        event time in millis since 1970
      • setMillis

        public void setMillis(long millis)
        Set event time.
        Parameters:
        millis - event time in millis since 1970
      • getThrown

        public Throwable getThrown()
        Get any throwable associated with the log record.

        If the event involved an exception, this will be the exception object. Otherwise null.

        Returns:
        a throwable
      • setThrown

        public void setThrown(Throwable thrown)
        Set a throwable associated with the log event.
        Parameters:
        thrown - a throwable (may be null)


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