Created
August 21, 2017 21:27
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cl-batisサンプル
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;; connection pool | |
(defvar *connection-pool* nil) | |
;; アプリケーションサーバが立ち上がるときに実行 | |
(defun init-database (driver-name &rest params &key database-name &allow-other-keys) | |
"initialize database" | |
(setf *connection-pool* (apply #'dbi-cp:make-dbi-connection-pool driver-name params))) | |
;; アプリケーションサーバ終了時に実行 | |
(defun shutdown-database () | |
(dbi-cp:shutdown *connection-pool*)) | |
;; こんな感じのマクロを定義 | |
(defmacro transactional ((db) &body body) | |
"transactional macro like SpringFramework" | |
`(let ((,db (batis:create-sql-session *connection-pool*))) | |
(handler-case | |
(progn | |
,@body) | |
(error (e) | |
(progn | |
(batis:rollback ,db) | |
e)) | |
(:no-error (c) | |
(batis:commit ,db) | |
c)))) | |
;; サービス層でこんな感じで使いたい | |
(defun foo-service (&rest params) | |
"this is service" | |
(transactional (db) | |
(check-parameters params) | |
(register-user db params) | |
(fetch-user db params))) | |
;; こんな感じでやりたいけど db っていうパラメータが見えなくなるのでちょっと嫌な感じ | |
@Transactional | |
(defun foo-service (&rest params) | |
"this is service" | |
(check-parameters params) | |
(register-user db params) | |
(fetch-usre db params)) | |
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