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;;; -*- Mode: LISP; Syntax: COMMON-LISP; Package: TBNL; Base: 10 -*-
;;; $Header: /usr/local/cvsrep/tbnl/log.lisp,v 1.16 2006-01-03 18:37:54 edi Exp $
;;; Copyright (c) 2004-2006, Dr. Edmund Weitz. All rights reserved.
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;; * Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;; * Redistributions in binary form must reproduce the above
;;; copyright notice, this list of conditions and the following
;;; disclaimer in the documentation and/or other materials
;;; provided with the distribution.
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
(in-package #:tbnl)
(defgeneric log-message (log-level fmt &rest args))
(defmethod log-message (log-level fmt &rest args)
"Sends a formatted message to Apache's error log when the data gets
sent to Apache/mod_lisp. FMT and ARGS are as in FORMAT. LOG-LEVEL is
a keyword denoting the corresponding Apache error level. When
*USE-APACHE-LOG* is false the message is written to *LOG-FILE*
instead."
(let ((message (apply #'format nil fmt args)))
(cond ((and *use-apache-log* *use-modlisp-headers*)
(with-input-from-string (s message)
(loop with prolog = (case *log-prefix*
((nil) "")
((t) "[TBNL] ")
(otherwise (format nil "[~A] " *log-prefix*)))
for line = (read-line s nil nil)
while line
do (push (cons log-level
(format nil "~A~A" prolog line))
(slot-value *reply* 'log-messages)))))
;; don't send log headers to client...
(*use-apache-log*)
(t (with-lock-held (*log-file-lock*)
(unless *log-file-stream*
(setq *log-file-stream*
(open (ensure-directories-exist *log-file*)
:direction :output
:if-does-not-exist :create
:if-exists :append)))
(format *log-file-stream*
"[~A~@[ [~A]~]] ~A~%" (iso-time) log-level message)
(force-output *log-file-stream*)))))
(values))
(defun log-message* (fmt &rest args)
"Same as LOG-MESSAGE* but with the default log level \(as
defined by *DEFAULT-LOG-LEVEL*)."
(apply #'log-message *default-log-level* fmt args))
(defun log-file ()
"Returns the log file which is currently used."
*log-file*)
(defun (setf log-file) (pathspec)
"Sets the log file which is to be used."
(with-lock-held (*log-file-lock*)
(when *log-file-stream*
(ignore-errors
(close *log-file-stream*))
(setq *log-file-stream* nil))
(setq *log-file* pathspec)))
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