Package org.apache.commons.logging.impl

Class Slf4jLogFactory

  • public final class Slf4jLogFactory
extends LogFactory
    Logger factory hardcoded to send everything to SLF4J.
    Since:
    1.3.0

    • Field Detail

      • EMPTY_OBJECT_ARRAY

        private static final java.lang.Object[] EMPTY_OBJECT_ARRAY

      • EMPTY_STRING_ARRAY

        private static final java.lang.String[] EMPTY_STRING_ARRAY

      • MARKER

        private static final org.slf4j.Marker MARKER
        Marker used by all messages coming from Apache Commons Logging.

      • loggers

        private final java.util.concurrent.ConcurrentMap<java.lang.String,​Log> loggers
        Caches Log instances.

        The SLF4J reference implementation (Logback) has a single logger context, so each call to getInstance(String) should give the same result.

      • attributes

        private final java.util.concurrent.ConcurrentMap<java.lang.String,​java.lang.Object> attributes

    • Constructor Detail

      • Slf4jLogFactory

        public Slf4jLogFactory()
        Constructs a new instance.

    • Method Detail

      • getAttribute

        public java.lang.Object getAttribute​(java.lang.String name)
        Description copied from class: LogFactory
        Gets the configuration attribute with the specified name (if any), or null if there is no such attribute.
        Specified by:
        getAttribute in class LogFactory
        Parameters:
        name - Name of the attribute to return
        Returns:
        the configuration attribute with the specified name.

      • getAttributeNames

        public java.lang.String[] getAttributeNames()
        Description copied from class: LogFactory
        Gets an array containing the names of all currently defined configuration attributes. If there are no such attributes, a zero length array is returned.
        Specified by:
        getAttributeNames in class LogFactory
        Returns:
        an array containing the names of all currently defined configuration attributes

      • getInstance

        public Log getInstance​(java.lang.Class<?> clazz)
                throws LogConfigurationException
        Description copied from class: LogFactory
        Gets a Log for the given class.
        Specified by:
        getInstance in class LogFactory
        Parameters:
        clazz - Class for which a suitable Log name will be derived
        Returns:
        a name from the specified class.
        Throws:
        LogConfigurationException - if a suitable Log instance cannot be returned

      • getInstance

        public Log getInstance​(java.lang.String name)
        Description copied from class: LogFactory
        Gets a (possibly new) Log instance, using the factory's current set of configuration attributes.

        NOTE - Depending upon the implementation of the LogFactory you are using, the Log instance you are returned may or may not be local to the current application, and may or may not be returned again on a subsequent call with the same name argument.

        Specified by:
        getInstance in class LogFactory
        Parameters:
        name - Logical name of the Log instance to be returned (the meaning of this name is only known to the underlying logging implementation that is being wrapped)
        Returns:
        a Log instance.

      • release

        public void release()
        This method is supposed to clear all loggers.

        In this implementation it calls a "stop" method if the logger factory supports it. This is the case of Logback.

        Specified by:
        release in class LogFactory

      • removeAttribute

        public void removeAttribute​(java.lang.String name)
        Description copied from class: LogFactory
        Removes any configuration attribute associated with the specified name. If there is no such attribute, no action is taken.
        Specified by:
        removeAttribute in class LogFactory
        Parameters:
        name - Name of the attribute to remove

      • setAttribute

        public void setAttribute​(java.lang.String name,
                         java.lang.Object value)
        Description copied from class: LogFactory
        Sets the configuration attribute with the specified name. Calling this with a null value is equivalent to calling removeAttribute(name).
        Specified by:
        setAttribute in class LogFactory
        Parameters:
        name - Name of the attribute to set
        value - Value of the attribute to set, or null to remove any setting for this attribute