1 ;;; -*- Mode: LISP; Syntax: COMMON-LISP; Package: HUNCHENTOOT; Base: 10 -*-
2 ;;; $Header: /usr/local/cvsrep/odd-streams/conditions.lisp,v 1.5 2007/12/31 01:08:45 edi Exp $
4 ;;; Copyright (c) 2008-2009, Dr. Edmund Weitz. All rights reserved.
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7 ;;; modification, are permitted provided that the following conditions
10 ;;; * Redistributions of source code must retain the above copyright
11 ;;; notice, this list of conditions and the following disclaimer.
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30 (in-package :hunchentoot
)
32 (define-condition hunchentoot-condition
(condition)
34 (:documentation
"Superclass for all conditions related to Hunchentoot."))
36 (define-condition hunchentoot-error
(hunchentoot-condition error
)
38 (:documentation
"Superclass for all errors related to Hunchentoot."))
40 (define-condition hunchentoot-simple-error
(hunchentoot-error simple-condition
)
42 (:documentation
"Like HUNCHENTOOT-ERROR but with formatting capabilities."))
44 (defun hunchentoot-error (format-control &rest format-arguments
)
45 "Signals an error of type HUNCHENTOOT-SIMPLE-ERROR with the provided
46 format control and arguments."
47 (error 'hunchentoot-simple-error
48 :format-control format-control
49 :format-arguments format-arguments
))
51 (define-condition hunchentoot-warning
(hunchentoot-condition warning
)
53 (:documentation
"Superclass for all warnings related to Hunchentoot."))
55 (define-condition hunchentoot-simple-warning
(hunchentoot-warning simple-condition
)
57 (:documentation
"Like HUNCHENTOOT-WARNING but with formatting capabilities."))
59 (defun hunchentoot-warn (format-control &rest format-arguments
)
60 "Signals a warning of type HUNCHENTOOT-SIMPLE-WARNING with the
61 provided format control and arguments."
62 (warn 'hunchentoot-simple-warning
63 :format-control format-control
64 :format-arguments format-arguments
))
66 (define-condition parameter-error
(hunchentoot-simple-error)
68 (:documentation
"Signalled if a function was called with incosistent or illegal parameters."))
70 (defun parameter-error (format-control &rest format-arguments
)
71 "Signals an error of type PARAMETER-ERROR with the provided
72 format control and arguments."
73 (error 'parameter-error
74 :format-control format-control
75 :format-arguments format-arguments
))
77 (define-condition operation-not-implemented
(hunchentoot-error)
78 ((operation :initarg
:operation
79 :reader hunchentoot-operation-not-implemented-operation
80 :documentation
"The name of the unimplemented operation."))
81 (:report
(lambda (condition stream
)
82 (format stream
"The operation ~A is not yet implemented for the implementation ~A.
83 Consider sending a patch..."
84 (hunchentoot-operation-not-implemented-operation condition
)
85 (lisp-implementation-type))))
86 (:documentation
"This warning is signalled when an operation \(like
87 SETUID for example) is not implemented for a specific Lisp."))
89 (defun not-implemented (name)
90 "Used to signal an error if an operation named NAME is not implemented."
91 (error 'operation-not-implemented
:operation name
))
93 (defgeneric maybe-invoke-debugger
(condition)
94 (:documentation
"This generic function is called whenever a
95 condition CONDITION is signaled in Hunchentoot. You might want to
96 specialize it on specific condition classes for debugging purposes.")
98 "The default method invokes the debugger with CONDITION if
99 *CATCH-ERRORS-P* is NIL."
100 (unless *catch-errors-p
*
101 (invoke-debugger condition
))))
103 (defmacro with-debugger
(&body body
)
104 "Executes BODY and invokes the debugger if an error is signaled and
105 *CATCH-ERRORS-P* is NIL."
106 `(handler-bind ((error #'maybe-invoke-debugger
))
109 (defmacro ignore-errors
* (&body body
)
110 "Like IGNORE-ERRORS, but observes *CATCH-ERRORS-P*."
111 `(ignore-errors (with-debugger ,@body
)))
113 (defmacro handler-case
* (expression &rest clauses
)
114 "Like HANDLER-CASE, but observes *CATCH-ERRORS-P*."
115 `(handler-case (with-debugger ,expression
)
118 (defun get-backtrace ()
119 "Returns a string with a backtrace of what the Lisp system thinks is
120 the \"current\" error."
122 (with-output-to-string (s)
123 (trivial-backtrace:print-backtrace-to-stream s
))
125 (format nil
"Could not generate backtrace: ~A." condition
))))