1 ;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
2 ;;;; *************************************************************************
3 ;;;; FILE IDENTIFICATION
5 ;;;; Name: initialize.lisp
6 ;;;; Purpose: Initializion routines for db backend
7 ;;;; Programmers: Kevin M. Rosenberg
8 ;;;; Date Started: May 2002
10 ;;;; This file, part of CLSQL, is Copyright (c) 2002-2010 by Kevin M. Rosenberg
11 ;;;; and Copyright (c) 1999-2001 by Pierre R. Mai
13 ;;;; CLSQL users are granted the rights to distribute and use this software
14 ;;;; as governed by the terms of the Lisp Lesser GNU Public License
15 ;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
16 ;;;; *************************************************************************
18 (in-package #:clsql-sys)
20 (defvar *loaded-database-types* nil
21 "Contains a list of database types which have been defined/loaded.")
23 (defmethod database-type-load-foreign (x)
24 (error "No generic function defined for database-type-load-foreign with parameters of ~S" x))
26 (defmethod database-type-load-foreign :after (database-type)
27 (when (database-type-library-loaded database-type)
28 (pushnew database-type *loaded-database-types*)))
30 (defun reload-database-types ()
31 "Reloads any foreign code for the loaded database types after a dump."
32 (mapc #'database-type-load-foreign *loaded-database-types*))
34 (defvar *default-database-type* nil
35 "Designates the default database type which is initialised by
36 the function INITIALISE-DATABASE-TYPE.")
38 (defvar *initialized-database-types* nil
39 "A list of database types which have currently been initialised
40 by calling INITIALIZE-DATABASE-TYPE.")
42 (defun initialize-database-type (&key (database-type *default-database-type*))
43 "Initializes the supplied DATABASE-TYPE, if it is not already
44 initialized, as indicated by *INITIALIZED-DATABASE-TYPES* and
45 returns DATABASE-TYPE. *DEFAULT-DATABASE-TYPE* is set to
46 DATABASE-TYPE and, if DATABASE-TYPE has not been initialised, it
47 is added to *INITIALIZED-DATABASE-TYPES*. "
48 (when (member database-type *initialized-database-types*)
49 (return-from initialize-database-type database-type))
51 (let ((system (intern (concatenate 'string
52 (symbol-name '#:clsql-)
53 (symbol-name database-type)))))
54 (when (not (find-package system))
55 (asdf:operate 'asdf:load-op system)))
57 (when (database-initialize-database-type database-type)
58 (push database-type *initialized-database-types*)
59 (setf *default-database-type* database-type)