NAME

       Net::CLI::Interact::Logger - Per-instance multi-target logging, with categories

SYNOPSIS

        $logger->log($category, $level, @message);

DESCRIPTION

       This module implements a generic logging service, based on Log::Dispatch but with additional options and
       configuration. Log messages coming from your application are categorized, and each category can be
       enabled/disabled separately and have its own log level (i.e. "emergency" .. "debug"). High resolution
       timestamps can be added to log messages.

DEFAULT CONFIGURATION

       Being based on Log::Dispatch::Config, this logger can have multiple targets, each configured for
       independent level thresholds. The overall default configuration is to print log messages to the screen
       (console), with a minimum level of "debug". Each category (see below) has its own log level as well.

       Note that categories, as discussed below, are arbitrary so if a category is not explicitly enabled or
       disabled, it is assumed to be disabled. If you wish to invent a new category for your application, simply
       think of the name and begin to use it, with a $level and @message as above in the SYNOPSIS.

INTERFACE

   log( $category, $level, @message )
       The combination of category and level determine whether the the log messages are emitted to any of the
       log destinations. Destinations are set using the "log_config" method, and categories are configured using
       the "log_flags" method.

       The @message list will be joined by a space character, and a newline appended if the last message doesn't
       contain one itself. Messages are prepended with the first character of their $category, and then indented
       proportionally to their $level.

   log_config( \%config )
       A "Log::Dispatch::Config" configuration (hash ref), meaning multiple log targets may be specified with
       different minimum level thresholds. There is a default configuration which emits messages to your screen
       (console) with no minimum threshold:

        {
            dispatchers => ['screen'],
            screen => {
                class => 'Log::Dispatch::Screen',
                min_level => 'debug',
            },
        };

   log_flags( \@categories | \%category_level_map )
       The user is expected to specify which log categories they are interested in, and at what levels. If a
       category is used in the application for logging but not specified, then it is deemed disabled. Hence,
       even though the default destination log level is "debug", no messages are emitted until a category is
       enabled.

       In the array reference form, the list should contain category names, and they will all be mapped to the
       "error" level:

        $logger->log_flags([qw/
            network
            disk
            io
            cpu
        /]);

       In the hash reference form, the keys should be category names and the values log levels from the list
       below (ordered such that each level "includes" the levels above):

        emergency
        alert
        critical
        error
        warning
        notice
        info
        debug

       For example:

        $logger->log_flags({
            network => 'info',
            disk    => 'debug',
            io      => 'critical',
            cpu     => 'debug',
        });

       Messages at or above the specified level will be passed on to the "Log::Dispatch" target, which may then
       specify an overriding threshold.

   " Net::CLI::Interact-"default_log_categories() >>
       Not a part of this class, but the only way to retrieve a list of the current log categories used in the
       Net::CLI::Interact distribution source. Does not take into account any log categories added by the user.

   log_stamp( $boolean )
       Enable (the default) or disable the display of high resolution interval timestamps with each log message.

   log_category( $boolean )
       Enable (the default) or disable the display of the first letters of the category name with each log
       message.

   log_start( [$seconds, $microseconds] )
       Time of the start for generating a time interval when logging stamps. Defaults to the result of
       "Time::HiRes::gettimeofday" at the point the module is loaded, in list context.

   would_log( $category, $level )
       Returns True if, according to the current "log_flags", the given $category is enabled at or above the
       threshold of $level, otherwise returns False.  Note that the "Log::Dispatch" targets maintain their own
       thresholds as well.

perl v5.36.0                                       2023-10-28                    Net::CLI::Interact::Logger(3pm)