X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=base%2Fpool.lisp;fp=base%2Fpool.lisp;h=0000000000000000000000000000000000000000;hb=8a8ee2d7d791b7a3efaed06420802a925d16fca3;hp=0564eb0e33f9651c2bc9af616e6c815d99111677;hpb=09f07ac9d914a83f9426609f3264f4e66b5a6d97;p=clsql.git

diff --git a/base/pool.lisp b/base/pool.lisp
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-;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Base: 10 -*-
-;;;; *************************************************************************
-;;;; FILE IDENTIFICATION
-;;;;
-;;;; Name:          pool.lisp
-;;;; Purpose:       Support function for connection pool
-;;;; Programmers:   Kevin M. Rosenberg, Marc Battyani
-;;;; Date Started:  Apr 2002
-;;;;
-;;;; $Id$
-;;;;
-;;;; This file, part of CLSQL, is Copyright (c) 2002-2003 by Kevin M. Rosenberg
-;;;;
-;;;; CLSQL users are granted the rights to distribute and use this software
-;;;; as governed by the terms of the Lisp Lesser GNU Public License
-;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
-;;;; *************************************************************************
-
-(in-package #:clsql-base)
-
-(defvar *db-pool* (make-hash-table :test #'equal))
-(defvar *db-pool-lock* (make-process-lock "DB Pool lock"))
-
-(defclass conn-pool ()
-  ((connection-spec :accessor connection-spec :initarg :connection-spec)
-   (database-type :accessor pool-database-type :initarg :pool-database-type)
-   (free-connections :accessor free-connections
-		     :initform (make-array 5 :fill-pointer 0 :adjustable t))
-   (all-connections :accessor all-connections
-		    :initform (make-array 5 :fill-pointer 0 :adjustable t))
-   (lock :accessor conn-pool-lock
-	 :initform (make-process-lock "Connection pool"))))
-
-(defun acquire-from-conn-pool (pool)
-  (or (with-process-lock ((conn-pool-lock pool) "Acquire from pool")
-	(and (plusp (length (free-connections pool)))
-	     (vector-pop (free-connections pool))))
-      (let ((conn (connect (connection-spec pool)
-			   :database-type (pool-database-type pool)
-			   :if-exists :new)))
-	(with-process-lock ((conn-pool-lock pool) "Acquire from pool")
-	  (vector-push-extend conn (all-connections pool))
-	  (setf (conn-pool conn) pool))
-	conn)))
-
-(defun release-to-conn-pool (conn)
-  (let ((pool (conn-pool conn)))
-    (with-process-lock ((conn-pool-lock pool) "Release to pool")
-      (vector-push-extend conn (free-connections pool)))))
-
-(defun clear-conn-pool (pool)
-  (with-process-lock ((conn-pool-lock pool) "Clear pool")
-    (loop for conn across (all-connections pool)
-	  do (setf (conn-pool conn) nil)
-	  (disconnect :database conn))
-    (setf (fill-pointer (free-connections pool)) 0)
-    (setf (fill-pointer (all-connections pool)) 0))
-  nil)
-
-(defun find-or-create-connection-pool (connection-spec database-type)
-  "Find connection pool in hash table, creates a new connection pool
-if not found"
-  (with-process-lock (*db-pool-lock* "Find-or-create connection")
-    (let* ((key (list connection-spec database-type))
-	   (conn-pool (gethash key *db-pool*)))
-      (unless conn-pool
-	(setq conn-pool (make-instance 'conn-pool
-				       :connection-spec connection-spec
-				       :pool-database-type database-type))
-	(setf (gethash key *db-pool*) conn-pool))
-      conn-pool)))
-
-(defun acquire-from-pool (connection-spec database-type &optional pool)
-  (unless (typep pool 'conn-pool)
-    (setf pool (find-or-create-connection-pool connection-spec database-type)))
-  (acquire-from-conn-pool pool))
-
-(defun release-to-pool (database)
-  (release-to-conn-pool database))
-
-(defun disconnect-pooled (&optional clear)
-  "Disconnects all connections in the pool."
-  (with-process-lock (*db-pool-lock* "Disconnect pooled")
-    (maphash
-     #'(lambda (key conn-pool)
-	 (declare (ignore key))
-	 (clear-conn-pool conn-pool))
-     *db-pool*)
-    (when clear (clrhash *db-pool*)))
-  t)
-
-;(defun pool-start-sql-recording (pool &key (types :command))
-;  "Start all stream in the pool recording actions of TYPES"
-;  (dolist (con (pool-connections pool))
-;    (start-sql-recording :type types
-;			 :database (connection-database con))))
-
-;(defun pool-stop-sql-recording (pool &key (types :command))
-;  "Start all stream in the pool recording actions of TYPES"
-;  (dolist (con (pool-connections pool))
-;    (stop-sql-recording :type types
-;			  :database (connection-database con))))
-
-;(defmacro with-database-connection (pool &body body)
-;  `(let ((connection (obtain-connection ,pool))
-;         (results nil))
-;    (unwind-protect
-;         (with-database ((connection-database connection))
-;           (setq results (multiple-value-list (progn ,@body))))
-;      (release-connection connection))
-;    (values-list results)))