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.\" ========================================================================
.\"
.IX Title "Log::Message::Simple 3"
.TH Log::Message::Simple 3 2023-07-26 "perl v5.38.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH NAME
Log::Message::Simple \- Simplified interface to Log::Message
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 2
\&    use Log::Message::Simple qw[msg error debug
\&                                carp croak cluck confess];
\&
\&    use Log::Message::Simple qw[:STD :CARP];
\&
\&    ### standard reporting functionality
\&    msg(    "Connecting to database",           $verbose );
\&    error(  "Database connection failed: $@",   $verbose );
\&    debug(  "Connection arguments were: $args", $debug );
\&
\&    ### standard carp functionality
\&    carp(   "Wrong arguments passed: @_" );
\&    croak(  "Fatal: wrong arguments passed: @_" );
\&    cluck(  "Wrong arguments passed \-\- including stacktrace: @_" );
\&    confess("Fatal: wrong arguments passed \-\- including stacktrace: @_" );
\&
\&    ### retrieve individual message
\&    my @stack = Log::Message::Simple\->stack;
\&    my @stack = Log::Message::Simple\->flush;
\&
\&    ### retrieve the entire stack in printable form
\&    my $msgs  = Log::Message::Simple\->stack_as_string;
\&    my $trace = Log::Message::Simple\->stack_as_string(1);
\&
\&    ### redirect output
\&    local $Log::Message::Simple::MSG_FH     = \e*STDERR;
\&    local $Log::Message::Simple::ERROR_FH   = \e*STDERR;
\&    local $Log::Message::Simple::DEBUG_FH   = \e*STDERR;
\&
\&    ### force a stacktrace on error
\&    local $Log::Message::Simple::STACKTRACE_ON_ERROR = 1
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
This module provides standardized logging facilities using the
\&\f(CW\*(C`Log::Message\*(C'\fR module.
.SH FUNCTIONS
.IX Header "FUNCTIONS"
.SS "msg(""message string"" [,VERBOSE])"
.IX Subsection "msg(""message string"" [,VERBOSE])"
Records a message on the stack, and prints it to \f(CW\*(C`STDOUT\*(C'\fR (or actually
\&\f(CW$MSG_FH\fR, see the \f(CW\*(C`GLOBAL VARIABLES\*(C'\fR section below), if the
\&\f(CW\*(C`VERBOSE\*(C'\fR option is true.
The \f(CW\*(C`VERBOSE\*(C'\fR option defaults to false.
.PP
Exported by default, or using the \f(CW\*(C`:STD\*(C'\fR tag.
.SS "debug(""message string"" [,VERBOSE])"
.IX Subsection "debug(""message string"" [,VERBOSE])"
Records a debug message on the stack, and prints it to \f(CW\*(C`STDOUT\*(C'\fR (or
actually \f(CW$DEBUG_FH\fR, see the \f(CW\*(C`GLOBAL VARIABLES\*(C'\fR section below),
if the \f(CW\*(C`VERBOSE\*(C'\fR option is true.
The \f(CW\*(C`VERBOSE\*(C'\fR option defaults to false.
.PP
Exported by default, or using the \f(CW\*(C`:STD\*(C'\fR tag.
.SS "error(""error string"" [,VERBOSE])"
.IX Subsection "error(""error string"" [,VERBOSE])"
Records an error on the stack, and prints it to \f(CW\*(C`STDERR\*(C'\fR (or actually
\&\f(CW$ERROR_FH\fR, see the \f(CW\*(C`GLOBAL VARIABLES\*(C'\fR sections below), if the
\&\f(CW\*(C`VERBOSE\*(C'\fR option is true.
The \f(CW\*(C`VERBOSE\*(C'\fR options defaults to true.
.PP
Exported by default, or using the \f(CW\*(C`:STD\*(C'\fR tag.
.SS \fBcarp()\fP;
.IX Subsection "carp();"
Provides functionality equal to \f(CWCarp::carp()\fR while still logging
to the stack.
.PP
Exported by using the \f(CW\*(C`:CARP\*(C'\fR tag.
.SS \fBcroak()\fP;
.IX Subsection "croak();"
Provides functionality equal to \f(CWCarp::croak()\fR while still logging
to the stack.
.PP
Exported by using the \f(CW\*(C`:CARP\*(C'\fR tag.
.SS \fBconfess()\fP;
.IX Subsection "confess();"
Provides functionality equal to \f(CWCarp::confess()\fR while still logging
to the stack.
.PP
Exported by using the \f(CW\*(C`:CARP\*(C'\fR tag.
.SS \fBcluck()\fP;
.IX Subsection "cluck();"
Provides functionality equal to \f(CWCarp::cluck()\fR while still logging
to the stack.
.PP
Exported by using the \f(CW\*(C`:CARP\*(C'\fR tag.
.SH "CLASS METHODS"
.IX Header "CLASS METHODS"
.SS Log::Message::Simple\->\fBstack()\fP
.IX Subsection "Log::Message::Simple->stack()"
Retrieves all the items on the stack. Since \f(CW\*(C`Log::Message::Simple\*(C'\fR is
implemented using \f(CW\*(C`Log::Message\*(C'\fR, consult its manpage for the
function \f(CW\*(C`retrieve\*(C'\fR to see what is returned and how to use the items.
.SS Log::Message::Simple\->stack_as_string([TRACE])
.IX Subsection "Log::Message::Simple->stack_as_string([TRACE])"
Returns the whole stack as a printable string. If the \f(CW\*(C`TRACE\*(C'\fR option is
true all items are returned with \f(CW\*(C`Carp::longmess\*(C'\fR output, rather than
just the message.
\&\f(CW\*(C`TRACE\*(C'\fR defaults to false.
.SS Log::Message::Simple\->\fBflush()\fP
.IX Subsection "Log::Message::Simple->flush()"
Removes all the items from the stack and returns them. Since
\&\f(CW\*(C`Log::Message::Simple\*(C'\fR is  implemented using \f(CW\*(C`Log::Message\*(C'\fR, consult its
manpage for the function \f(CW\*(C`retrieve\*(C'\fR to see what is returned and how
to use the items.
.SH "GLOBAL VARIABLES"
.IX Header "GLOBAL VARIABLES"
.ie n .IP $ERROR_FH 4
.el .IP \f(CW$ERROR_FH\fR 4
.IX Item "$ERROR_FH"
This is the filehandle all the messages sent to \f(CWerror()\fR are being
printed. This defaults to \f(CW*STDERR\fR.
.ie n .IP $MSG_FH 4
.el .IP \f(CW$MSG_FH\fR 4
.IX Item "$MSG_FH"
This is the filehandle all the messages sent to \f(CWmsg()\fR are being
printed. This default to \f(CW*STDOUT\fR.
.ie n .IP $DEBUG_FH 4
.el .IP \f(CW$DEBUG_FH\fR 4
.IX Item "$DEBUG_FH"
This is the filehandle all the messages sent to \f(CWdebug()\fR are being
printed. This default to \f(CW*STDOUT\fR.
.ie n .IP $STACKTRACE_ON_ERROR 4
.el .IP \f(CW$STACKTRACE_ON_ERROR\fR 4
.IX Item "$STACKTRACE_ON_ERROR"
If this option is set to \f(CW\*(C`true\*(C'\fR, every call to \f(CWerror()\fR will
generate a stacktrace using \f(CWCarp::shortmess()\fR.
Defaults to \f(CW\*(C`false\*(C'\fR