X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=elmo%2Felmo-cache.el;h=a046d838a24e5925361f9d19a751672c7ebe8a10;hb=8b003dd16e3d4a1f0d29b5fcd0f57a2ee294f967;hp=993b7d7d2db63d6a10e9184eb4b84fbd9c4ed523;hpb=1d107a7b0e5b7f1b97a9764b3d35a369da2216d3;p=elisp%2Fwanderlust.git

diff --git a/elmo/elmo-cache.el b/elmo/elmo-cache.el
index 993b7d7..a046d83 100644
--- a/elmo/elmo-cache.el
+++ b/elmo/elmo-cache.el
@@ -32,721 +32,191 @@
 ;; 
 (require 'elmo-vars)
 (require 'elmo-util)
-
-(defun elmo-cache-delete (msgid folder number)
-  "Delete cache file associated with message-id 'MSGID', FOLDER, NUMBER."
-  (let ((path (elmo-cache-exists-p msgid folder number)))
-    (if path (delete-file path))))
-
-(defsubst elmo-cache-to-msgid (filename)
-  (concat "<" (elmo-recover-msgid-from-filename filename) ">"))
-
-(defun elmo-cache-force-delete (path &optional locked)
-  "Delete cache file."
-  ;; for safety...
-  (unless (string-match elmo-cache-dirname path)
-    (error "%s is not cache file!" path))
-  (let (message-id)
-    (if (or (elmo-msgdb-global-mark-get
-	     (setq message-id
-		   (elmo-cache-to-msgid (file-name-nondirectory path))))
-	    (member message-id locked))
-	nil;; Don't delete caches with mark (or locked message).
-      (if (and path
-	       (file-directory-p path))
-	  (progn
-	    (mapcar 'delete-file (directory-files path t "^[^\\.]"))
-	    (delete-directory path))
-	(delete-file path))
-      t)))
-
-(defun elmo-cache-delete-partial (msgid folder number)
-  "Delete cache file only if it is partial message."
-  (if msgid
-      (let ((path1 (elmo-cache-get-path msgid))
-	    path2)
-	(if (and path1
-		 (file-exists-p path1))
-	    (if (and folder
-		     (file-directory-p path1))
-		(when (file-exists-p (setq path2
-					   (expand-file-name
-					    (format "%s@%s"
-						    number
-						    (elmo-safe-filename
-						     folder))
-					    path1)))
-		  (delete-file path2)
-		  (unless (directory-files path1 t "^[^\\.]")
-		    (delete-directory path1))))))))
-
-(defun elmo-cache-read (msgid &optional folder number outbuf)
-  "Read cache contents to OUTBUF."
-  (save-excursion
-    (let ((path (elmo-cache-exists-p msgid folder number)))
-      (when path
-	(if outbuf (set-buffer outbuf))
-	(erase-buffer)
-	(as-binary-input-file (insert-file-contents path))
-	t))))
-
-(defun elmo-cache-expire ()
-  (interactive)
-  (let* ((completion-ignore-case t)
-	 (method (completing-read (format "Expire by (%s): "
-					  elmo-cache-expire-default-method)
-				  '(("size" . "size")
-				    ("age" . "age")))))
-    (if (string= method "")
-	(setq method elmo-cache-expire-default-method))
-    (funcall (intern (concat "elmo-cache-expire-by-" method)))))
-
-(defun elmo-read-float-value-from-minibuffer (prompt &optional initial)
-  (let ((str (read-from-minibuffer prompt initial)))
-    (cond
-     ((string-match "[0-9]*\\.[0-9]+" str)
-      (string-to-number str))
-     ((string-match "[0-9]+" str)
-      (string-to-number (concat str ".0")))
-     (t (error "%s is not number" str)))))
-
-(defun elmo-cache-expire-by-size (&optional kbytes)
-  "Expire cache file by size.
-If KBYTES is kilo bytes (This value must be float)."
-  (interactive)
-  (let ((size (or kbytes
-		  (and (interactive-p)
-		       (elmo-read-float-value-from-minibuffer
-			"Enter cache disk size (Kbytes): "
-			(number-to-string
-			 (if (integerp elmo-cache-expire-default-size)
-			     (float elmo-cache-expire-default-size)
-			   elmo-cache-expire-default-size))))
-		  (if (integerp elmo-cache-expire-default-size)
-		      (float elmo-cache-expire-default-size))))
-	(locked (elmo-dop-lock-list-load))
-	(count 0)
-	(Kbytes 1024)
-	total beginning)
-    (message "Checking disk usage...")
-    (setq total (/ (elmo-disk-usage
-		    (expand-file-name
-		     elmo-cache-dirname elmo-msgdb-dir)) Kbytes))
-    (setq beginning total)
-    (message "Checking disk usage...done")
-    (let ((cfl (elmo-cache-get-sorted-cache-file-list))
-	  (deleted 0)
-	  oldest
-	  cur-size cur-file)
-      (while (and (<= size total)
-		  (setq oldest (elmo-cache-get-oldest-cache-file-entity cfl)))
-	(setq cur-file (expand-file-name (car (cdr oldest)) (car oldest)))
-	(setq cur-size (/ (elmo-disk-usage cur-file) Kbytes))
-	(when (elmo-cache-force-delete cur-file locked)
-	  (setq count (+ count 1))
-	  (message "%d cache(s) are expired." count))
-	(setq deleted (+ deleted cur-size))
-	(setq total (- total cur-size)))
-      (message "%d cache(s) are expired from disk (%d Kbytes/%d Kbytes)."
-	       count deleted beginning))))
-
-(defun elmo-cache-make-file-entity (filename path)
-  (cons filename (elmo-get-last-accessed-time filename path)))
-
-(defun elmo-cache-get-oldest-cache-file-entity (cache-file-list)
-  (let ((cfl cache-file-list)
-	flist firsts oldest-entity wonlist)
-    (while cfl
-      (setq flist (cdr (car cfl)))
-      (setq firsts (append firsts (list
-				   (cons (car (car cfl))
-					 (car flist)))))
-      (setq cfl (cdr cfl)))
-;;; (prin1 firsts)
-    (while firsts
-      (if (and (not oldest-entity)
-	       (cdr (cdr (car firsts))))
-	  (setq oldest-entity (car firsts)))
-      (if (and (cdr (cdr (car firsts)))
-	       (cdr (cdr oldest-entity))
-	       (> (cdr (cdr oldest-entity)) (cdr (cdr (car firsts)))))
-	  (setq oldest-entity (car firsts)))
-      (setq firsts (cdr firsts)))
-    (setq wonlist (assoc (car oldest-entity) cache-file-list))
-    (and wonlist
-	 (setcdr wonlist (delete (car (cdr wonlist)) (cdr wonlist))))
-    oldest-entity))
-
-(defun elmo-cache-get-sorted-cache-file-list ()
-  (let ((dirs (directory-files
-	       (expand-file-name elmo-cache-dirname elmo-msgdb-dir)
-	       t "^[^\\.]"))
-	(i 0) num
-	elist
-	ret-val)
-    (setq num (length dirs))
-    (message "Collecting cache info...")
-    (while dirs
-      (setq elist (mapcar (lambda (x)
-			    (elmo-cache-make-file-entity x (car dirs)))
-			  (directory-files (car dirs) nil "^[^\\.]")))
-      (setq ret-val (append ret-val
-			    (list (cons
-				   (car dirs)
-				   (sort
-				    elist
-				    (lambda (x y)
-				      (< (cdr x)
-					 (cdr y))))))))
-      (when (> num elmo-display-progress-threshold)
-	(setq i (+ i 1))
-	(elmo-display-progress
-	 'elmo-cache-get-sorted-cache-file-list "Collecting cache info..."
-	 (/ (* i 100) num)))
-      (setq dirs (cdr dirs)))
-    (message "Collecting cache info...done")
-    ret-val))
-
-(defun elmo-cache-expire-by-age (&optional days)
-  (let ((age (or (and days (int-to-string days))
-		 (and (interactive-p)
-		      (read-from-minibuffer
-		       (format "Enter days (%s): "
-			       elmo-cache-expire-default-age)))
-		 (int-to-string elmo-cache-expire-default-age)))
-	(dirs (directory-files
-	       (expand-file-name elmo-cache-dirname elmo-msgdb-dir)
-	       t "^[^\\.]"))
-	(locked (elmo-dop-lock-list-load))
-	(count 0)
-	curtime)
-    (if (string= age "")
-	(setq age elmo-cache-expire-default-age)
-      (setq age (string-to-int age)))
-    (setq curtime (current-time))
-    (setq curtime (+ (* (nth 0 curtime)
-			(float 65536)) (nth 1 curtime)))
-    (while dirs
-      (let ((files (directory-files (car dirs) t "^[^\\.]"))
-	    (limit-age (* age 86400)))
-	(while files
-	  (when (> (- curtime (elmo-get-last-accessed-time (car files)))
-		   limit-age)
-	    (when (elmo-cache-force-delete (car files) locked)
-	      (setq count (+ 1 count))
-	      (message "%d cache file(s) are expired." count)))
-	  (setq files (cdr files))))
-      (setq dirs (cdr dirs)))))
-
-(defun elmo-cache-save (msgid partial folder number &optional inbuf)
-  "If PARTIAL is non-nil, save current buffer (or INBUF) as partial cache."
-  (condition-case nil
-      (save-excursion
-	(let* ((path (if partial
-			 (elmo-cache-get-path msgid folder number)
-		       (elmo-cache-get-path msgid)))
-	       dir tmp-buf)
-	  (when path
-	    (setq dir (directory-file-name (file-name-directory path)))
-	    (if (not (file-exists-p dir))
-		(elmo-make-directory dir))
-	    (if inbuf (set-buffer inbuf))
-	    (goto-char (point-min))
-	    (as-binary-output-file (write-region (point-min) (point-max)
-						 path nil 'no-msg)))))
-    (error)))
-
-(defun elmo-cache-exists-p (msgid &optional folder number)
-  "Returns the path if the cache exists."
-  (save-match-data
-    (if msgid
-	(let ((path (elmo-cache-get-path msgid)))
-	  (if (and path
-		   (file-exists-p path))
-	      (if (and folder
-		       (file-directory-p path))
-		  (if (file-exists-p (setq path (expand-file-name
-						 (format "%s@%s"
-							 (or number "")
-							 (elmo-safe-filename
-							  folder))
-						 path)))
-		      path
-		    )
-		;; not directory.
-		path))))))
-
-(defun elmo-cache-search-all (folder condition from-msgs)
-  (let* ((number-alist (elmo-msgdb-number-load
-			(elmo-msgdb-expand-path folder)))
-	 (number-list (or from-msgs (mapcar 'car number-alist)))
-	 (num (length number-alist))
-	 cache-file
-	 ret-val
-	 case-fold-search msg
-	 percent i)
-    (setq i 0)
-    (while number-alist
-      (if (and (memq (car (car number-alist)) number-list)
-	       (setq cache-file (elmo-cache-exists-p (cdr (car
-							   number-alist))
-						     folder
-						     (car (car
-							   number-alist))))
-	       (elmo-file-field-condition-match cache-file condition
-						(car (car number-alist))
-						number-list))
-	  (setq ret-val (append ret-val (list (caar number-alist)))))
-      (when (> num elmo-display-progress-threshold)
-	(setq i (1+ i))
-	(setq percent (/ (* i 100) num))
-	(elmo-display-progress
-	 'elmo-cache-search-all "Searching..."
-	 percent))
-      (setq number-alist (cdr number-alist)))
-    ret-val))
-
-(defun elmo-cache-collect-sub-directories (init dir &optional recursively)
-  "Collect subdirectories under DIR."
-  (let ((dirs
-	 (delete (expand-file-name elmo-cache-dirname
-				   elmo-msgdb-dir)
-		 (directory-files dir t "^[^\\.]")))
-	ret-val)
-    (setq dirs (elmo-delete-if (lambda (x) (not (file-directory-p x))) dirs))
-    (setq ret-val (append init dirs))
-    (while (and recursively dirs)
-      (setq ret-val
-	    (elmo-cache-collect-sub-directories
-	     ret-val
-	     (car dirs) recursively))
-      (setq dirs (cdr dirs)))
-    ret-val))
-
-(defun elmo-msgid-to-cache (msgid)
-  (when (and msgid
-	     (string-match "<\\(.+\\)>$" msgid))
-    (elmo-replace-msgid-as-filename (elmo-match-string 1 msgid))))
-
-(defun elmo-cache-get-path (msgid &optional folder number)
-  "Get path for cache file associated with MSGID, FOLDER, and NUMBER."
-  (if (setq msgid (elmo-msgid-to-cache msgid))
-      (expand-file-name
-       (expand-file-name
-	(if folder
-	    (format "%s/%s/%s@%s"
-		    (elmo-cache-get-path-subr msgid)
-		    msgid
-		    (or number "")
-		    (elmo-safe-filename folder))
-	  (format "%s/%s"
-		  (elmo-cache-get-path-subr msgid)
-		  msgid))
-	(expand-file-name elmo-cache-dirname
-			  elmo-msgdb-dir)))))
-
-(defsubst elmo-cache-get-path-subr (msgid)
-  (let ((chars '(?0 ?1 ?2 ?3 ?4 ?5 ?6 ?7 ?8 ?9 ?A ?B ?C ?D ?E ?F))
-	(clist (string-to-char-list msgid))
-	(sum 0))
-    (while clist
-      (setq sum (+ sum (car clist)))
-      (setq clist (cdr clist)))
-    (format "%c%c"
-	    (nth (% (/ sum 16) 2) chars)
-	    (nth (% sum 16) chars))))
-  
+(require 'elmo)
+(require 'elmo-map)
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; buffer cache module
-
-(defconst elmo-buffer-cache-name " *elmo cache*")
-
-(defvar elmo-buffer-cache nil
-  "Message cache.  (old ... new) order alist.
-With association ((\"folder\" message \"message-id\") . cache-buffer).")
-
-(defmacro elmo-buffer-cache-buffer-get (entry)
-  (` (cdr (, entry))))
-
-(defmacro elmo-buffer-cache-folder-get (entry)
-  (` (car (car (, entry)))))
-
-(defmacro elmo-buffer-cache-message-get (entry)
-  (` (cdr (car (, entry)))))
-
-(defmacro elmo-buffer-cache-entry-make (fld-msg-id buf)
-  (` (cons (, fld-msg-id) (, buf))))
-
-(defmacro elmo-buffer-cache-hit (fld-msg-id)
-  "Return value assosiated with key."
-  (` (elmo-buffer-cache-buffer-get
-      (assoc (, fld-msg-id) elmo-buffer-cache))))
-
-(defun elmo-buffer-cache-sort (entry)
-  (let* ((pointer (cons nil elmo-buffer-cache))
-	 (top pointer))
-    (while (cdr pointer)
-      (if (equal (car (cdr pointer)) entry)
-	  (setcdr pointer (cdr (cdr pointer)))
-	(setq pointer (cdr pointer))))
-    (setcdr pointer (list entry))
-    (setq elmo-buffer-cache (cdr top))))
-
-(defun elmo-buffer-cache-add (fld-msg-id)
-  "Adding (FLD-MSG-ID . buf) to the top of `elmo-buffer-cache'.
-Returning its cache buffer."
-  (let ((len (length elmo-buffer-cache))
-	(buf nil))
-    (if (< len elmo-buffer-cache-size)
-	(setq buf (get-buffer-create (format "%s%d" elmo-buffer-cache-name len)))
-      (setq buf (elmo-buffer-cache-buffer-get (nth (1- len) elmo-buffer-cache)))
-      (setcdr (nthcdr (- len 2) elmo-buffer-cache) nil))
-    (save-excursion
-      (set-buffer buf)
-      (elmo-set-buffer-multibyte nil))
-    (setq elmo-buffer-cache
-	  (cons (elmo-buffer-cache-entry-make fld-msg-id buf)
-		elmo-buffer-cache))
-    buf))
-
-(defun elmo-buffer-cache-delete ()
-  "Delete the most recent cache entry."
-  (let ((buf (elmo-buffer-cache-buffer-get (car elmo-buffer-cache))))
-    (setq elmo-buffer-cache
-	  (nconc (cdr elmo-buffer-cache)
-		 (list (elmo-buffer-cache-entry-make nil buf))))))
-
-(defun elmo-buffer-cache-clean-up ()
-  "A function to flush all decoded messages in cache list."
-  (interactive)
-  (let ((n 0) buf)
-    (while (< n elmo-buffer-cache-size)
-      (setq buf (concat elmo-buffer-cache-name (int-to-string n)))
-      (elmo-kill-buffer buf)
-      (setq n (1+ n))))
-  (setq elmo-buffer-cache nil))
-
-;;
+;; 
 ;; cache backend by Kenichi OKADA <okada@opaopa.org>
 ;;
+(eval-and-compile
+  (luna-define-class elmo-cache-folder (elmo-map-folder) (dir-name directory))
+  (luna-define-internal-accessors 'elmo-cache-folder))
+
+(luna-define-method elmo-folder-initialize ((folder elmo-cache-folder)
+					    name)
+  (when (string-match "\\([^/]*\\)/?\\(.*\\)$" name)
+    (elmo-cache-folder-set-dir-name-internal
+     folder
+     (elmo-match-string 2 name))
+    (elmo-cache-folder-set-directory-internal
+     folder
+     (expand-file-name (elmo-match-string 2 name)
+		       (expand-file-name elmo-cache-dirname elmo-msgdb-dir)))
+    folder))
+
+(luna-define-method elmo-folder-expand-msgdb-path ((folder elmo-cache-folder))
+  (expand-file-name (elmo-cache-folder-dir-name-internal folder)
+		    (expand-file-name "internal/cache"
+				      elmo-msgdb-dir)))
+
+(luna-define-method elmo-map-folder-list-message-locations
+  ((folder elmo-cache-folder))
+  (elmo-cache-folder-list-message-locations folder))
+
+(defun elmo-cache-folder-list-message-locations (folder)
+  (mapcar 'file-name-nondirectory
+	  (elmo-delete-if
+	   'file-directory-p
+	   (directory-files (elmo-cache-folder-directory-internal folder)
+			    t "^[^@]+@[^@]+$" t))))
+
+(luna-define-method elmo-folder-list-subfolders ((folder elmo-cache-folder)
+						 &optional one-level)
+  (delq nil (mapcar
+	     (lambda (f) (if (file-directory-p f)
+			     (concat (elmo-folder-prefix-internal folder)
+				     "cache/"
+				     (file-name-nondirectory f))))
+	     (directory-files (elmo-cache-folder-directory-internal folder)
+			      t "^[^.].*+"))))
+
+(luna-define-method elmo-folder-message-file-p ((folder elmo-cache-folder))
+  t)
 
-(defsubst elmo-cache-get-folder-directory (spec)
-  (if (file-name-absolute-p (nth 1 spec))
-      (nth 1 spec) ; already full path.
-    (expand-file-name (nth 1 spec)
-		      (expand-file-name elmo-cache-dirname elmo-msgdb-dir))))
-
-(defun elmo-cache-msgdb-expand-path (spec)
-  (let ((fld-name (nth 1 spec)))
-    (expand-file-name fld-name
-		      (expand-file-name "internal/cache"
-					elmo-msgdb-dir))))
-
-(defun elmo-cache-number-to-filename (spec number)
-  (let ((number-alist
-	 (elmo-cache-list-folder-subr spec nil t)))
-    (elmo-msgid-to-cache
-     (cdr (assq number number-alist)))))
-
-(if (boundp 'nemacs-version)
-    (defsubst elmo-cache-insert-header (file)
-      "Insert the header of the article (Does not work on nemacs)."
-      (as-binary-input-file
-       (insert-file-contents file)))
-  (defsubst elmo-cache-insert-header (file)
-    "Insert the header of the article."
-    (let ((beg 0)
-	  insert-file-contents-pre-hook	; To avoid autoconv-xmas...
-	  insert-file-contents-post-hook
-	  format-alist)
-      (when (file-exists-p file)
-	;; Read until header separator is found.
-	(while (and (eq elmo-localdir-header-chop-length
-			(nth 1
-			     (as-binary-input-file
-			      (insert-file-contents
-			       file nil beg
-			       (incf beg elmo-localdir-header-chop-length)))))
-		    (prog1 (not (search-forward "\n\n" nil t))
-		      (goto-char (point-max)))))))))
-
-(defsubst elmo-cache-msgdb-create-overview-entity-from-file (number file)
-  (save-excursion
-    (let ((tmp-buffer (get-buffer-create " *ELMO Cache Temp*"))
-	  insert-file-contents-pre-hook   ; To avoid autoconv-xmas...
-	  insert-file-contents-post-hook header-end
-	  (attrib (file-attributes file))
-	  ret-val size mtime)
-      (set-buffer tmp-buffer)
-      (erase-buffer)
-      (if (not (file-exists-p file))
+(luna-define-method elmo-message-file-name ((folder elmo-cache-folder)
+					    number)
+  (expand-file-name
+   (elmo-map-message-location folder number)
+   (elmo-cache-folder-directory-internal folder)))
+
+(luna-define-method elmo-folder-msgdb-create ((folder elmo-cache-folder)
+					      numbers new-mark
+					      already-mark seen-mark
+					      important-mark
+					      seen-list)
+  (let ((i 0)
+	(len (length numbers))
+	overview number-alist mark-alist entity message-id
+	num mark)
+    (message "Creating msgdb...")
+    (while numbers
+      (setq entity
+	    (elmo-msgdb-create-overview-entity-from-file
+	     (car numbers) (elmo-message-file-name folder (car numbers))))
+      (if (null entity)
 	  ()
-	(setq size (nth 7 attrib))
-	(setq mtime (timezone-make-date-arpa-standard
-		     (current-time-string (nth 5 attrib)) (current-time-zone)))
-	;; insert header from file.
-	(catch 'done
-	  (condition-case nil
-	      (elmo-cache-insert-header file)
-	    (error (throw 'done nil)))
-	  (goto-char (point-min))
-	  (setq header-end
-		(if (re-search-forward "\\(^--.*$\\)\\|\\(\n\n\\)" nil t)
-		    (point)
-		  (point-max)))
-	  (narrow-to-region (point-min) header-end)
-	  (setq ret-val (elmo-msgdb-create-overview-from-buffer number size mtime))
-	  (kill-buffer tmp-buffer))
-	ret-val))))
-
-(defun elmo-cache-msgdb-create-as-numlist (spec numlist new-mark
-						   already-mark seen-mark
-						   important-mark seen-list)
-  (when numlist
-    (let ((dir (elmo-cache-get-folder-directory spec))
-	  (nalist (elmo-cache-list-folder-subr spec nil t))
-	  overview number-alist mark-alist entity message-id
-	  i percent len num seen gmark)
-      (setq len (length numlist))
-      (setq i 0)
-      (message "Creating msgdb...")
-      (while numlist
-	(setq entity
-	      (elmo-cache-msgdb-create-overview-entity-from-file
-	       (car numlist)
-	       (expand-file-name
-		(elmo-msgid-to-cache
-		 (setq message-id (cdr (assq (car numlist) nalist)))) dir)))
-	(if (null entity)
-	    ()
-	  (setq num (elmo-msgdb-overview-entity-get-number entity))
-	  (setq overview
-		(elmo-msgdb-append-element
-		 overview entity))
-	  (setq number-alist
-		(elmo-msgdb-number-add number-alist num message-id))
-	  (setq seen (member message-id seen-list))
-	  (if (setq gmark (or (elmo-msgdb-global-mark-get message-id)
-			      (if seen
-				  nil
-				new-mark)))
-	      (setq mark-alist
-		    (elmo-msgdb-mark-append
-		     mark-alist
-		     num
-		     gmark))))
+	(setq num (elmo-msgdb-overview-entity-get-number entity))
+	(setq overview
+	      (elmo-msgdb-append-element
+	       overview entity))
+	(setq message-id (elmo-msgdb-overview-entity-get-id entity))
+	(setq number-alist
+	      (elmo-msgdb-number-add number-alist
+				     num
+				     message-id))
+	(if (setq mark (or (elmo-msgdb-global-mark-get message-id)
+			   (if (member message-id seen-list) nil new-mark)))
+	    (setq mark-alist
+		  (elmo-msgdb-mark-append
+		   mark-alist
+		   num mark)))
 	(when (> len elmo-display-progress-threshold)
 	  (setq i (1+ i))
-	  (setq percent (/ (* i 100) len))
 	  (elmo-display-progress
-	   'elmo-cache-msgdb-create-as-numlist "Creating msgdb..."
-	   percent))
-	(setq numlist (cdr numlist)))
-      (message "Creating msgdb...done")
-      (list overview number-alist mark-alist))))
-
-(defalias 'elmo-cache-msgdb-create 'elmo-cache-msgdb-create-as-numlist)
-
-(defun elmo-cache-list-folders (spec &optional hierarchy)
-  (let ((folder (concat "'cache" (nth 1 spec))))
-    (elmo-cache-list-folders-subr folder hierarchy)))
-
-(defun elmo-cache-list-folders-subr (folder &optional hierarchy)
-  (let ((case-fold-search t)
-	folders curdir dirent relpath abspath attr
-	subprefix subfolder)
-    (condition-case ()
-	(progn
-	  (setq curdir
-		(expand-file-name
-		 (nth 1 (elmo-folder-get-spec folder))
-		 (expand-file-name elmo-cache-dirname elmo-msgdb-dir)))
-	  (if (string-match "^[+=$!]$" folder) ; localdir, archive, localnews
-	      (setq subprefix folder)
-	    (setq subprefix (concat folder elmo-path-sep)))
-	    ;; include parent
-	    ;(setq folders (list folder)))
-	  (setq dirent (directory-files curdir nil "^[01][0-9A-F]$"))
-	  (catch 'done
-	   (while dirent
-	    (setq relpath (car dirent))
-	    (setq dirent (cdr dirent))
-	    (setq abspath (expand-file-name relpath curdir))
-	    (and
-	     (eq (nth 0 (setq attr (file-attributes abspath))) t)
-	     (setq subfolder (concat subprefix relpath))
-	     (setq folders (nconc folders (list subfolder))))))
-	  folders)
-      (file-error folders))))
-
-(defsubst elmo-cache-list-folder-subr (spec &optional nonsort nonalist)
-  (let* ((dir (elmo-cache-get-folder-directory spec))
-	 (flist (mapcar 'file-name-nondirectory
-			(elmo-delete-if 'file-directory-p
-					(directory-files
-					 dir t "^[^@]+@[^@]+$" t))))
-	 (folder (concat "'cache/" (nth 1 spec)))
-	 (number-alist (or (elmo-msgdb-number-load
-			    (elmo-msgdb-expand-path folder))
-			   (list nil)))
-	 nlist)
-    (setq nlist
-	  (mapcar '(lambda (filename)
-		     (elmo-cache-filename-to-number filename number-alist))
-		  flist))
-    (if nonalist
-	number-alist
-      (if nonsort
-	  (cons (or (elmo-max-of-list nlist) 0) (length nlist))
-	(sort nlist '<)))))
-
-(defsubst elmo-cache-filename-to-number (filename number-alist)
-  (let* ((msgid (elmo-cache-to-msgid filename))
-	 number)
-    (or (car (rassoc msgid number-alist))
-	(prog1
-	    (setq number (+ (or (caar (last number-alist))
-				0) 1))
-	  (if (car number-alist)
-	      (nconc number-alist
-		     (list (cons number msgid)))
-	    (setcar number-alist (cons number msgid)))))))
-
-(defun elmo-cache-append-msg (spec string message-id &optional msg no-see)
-  (let ((dir (elmo-cache-get-folder-directory spec))
-	(tmp-buffer (get-buffer-create " *ELMO Temp buffer*"))
-	filename)
-    (save-excursion
-      (set-buffer tmp-buffer)
-      (erase-buffer)
-      (setq filename (expand-file-name (elmo-msgid-to-cache message-id) dir))
-      (unwind-protect
-	  (if (file-writable-p filename)
-	      (progn
-		(insert string)
-		(as-binary-output-file
-		 (write-region (point-min) (point-max) filename nil 'no-msg))
-		t)
-	    nil)
-	(kill-buffer tmp-buffer)))))
-
-(defun elmo-cache-delete-msg (spec number locked)
-  (let* ((dir (elmo-cache-get-folder-directory spec))
-	 (file (expand-file-name
-		(elmo-cache-number-to-filename spec number) dir)))
-    ;; return nil if failed.
-    (elmo-cache-force-delete file locked)))
-
-(defun elmo-cache-read-msg (spec number outbuf &optional msgdb unread)
-  (save-excursion
-    (let* ((dir (elmo-cache-get-folder-directory spec))
-	   (file (expand-file-name
-		  (elmo-cache-number-to-filename spec number) dir)))
-      (set-buffer outbuf)
-      (erase-buffer)
-      (when (file-exists-p file)
-	(as-binary-input-file (insert-file-contents file))
-	(elmo-delete-cr-get-content-type)))))
-
-(defun elmo-cache-delete-msgs (spec msgs)
-  (let ((locked (elmo-dop-lock-list-load)))
-    (not (memq nil
-	       (mapcar '(lambda (msg) (elmo-cache-delete-msg spec msg locked))
-		       msgs)))))
-
-(defun elmo-cache-list-folder (spec)	; called by elmo-cache-search()
-  (let ((killed (and elmo-use-killed-list
-		     (elmo-msgdb-killed-list-load
-		      (elmo-msgdb-expand-path spec))))
-	numbers)
-    (setq numbers (elmo-cache-list-folder-subr spec))
-    (elmo-living-messages numbers killed)))
-
-(defun elmo-cache-max-of-folder (spec)
-  (elmo-cache-list-folder-subr spec t))
-
-(defun elmo-cache-check-validity (spec validity-file)
+	   'elmo-cache-folder-msgdb-create "Creating msgdb..."
+	   (/ (* i 100) len))))
+      (setq numbers (cdr numbers)))
+    (message "Creating msgdb...done")
+    (list overview number-alist mark-alist)))
+
+(luna-define-method elmo-folder-append-buffer ((folder elmo-cache-folder)
+					       unread
+					       &optional number)
+  ;; dir-name is changed according to msgid.
+  (unless (elmo-cache-folder-dir-name-internal folder)
+    (let* ((file (elmo-file-cache-get-path (std11-field-body "message-id")))
+	   (dir (directory-file-name (file-name-directory file))))
+      (unless (file-exists-p dir)
+	(elmo-make-directory dir))
+      (when (file-writable-p file)
+	(write-region-as-binary
+	 (point-min) (point-max) file nil 'no-msg))))
   t)
 
-(defun elmo-cache-sync-validity (spec validity-file)
-  t)
-
-(defun elmo-cache-folder-exists-p (spec)
-  (file-directory-p (elmo-cache-get-folder-directory spec)))
-
-(defun elmo-cache-folder-creatable-p (spec)
+(luna-define-method elmo-map-folder-delete-messages ((folder elmo-cache-folder)
+						     locations)
+  (dolist (location locations)
+    (elmo-file-cache-delete
+     (expand-file-name location
+		       (elmo-cache-folder-directory-internal folder)))))
+
+(luna-define-method elmo-message-fetch-with-cache-process
+  ((folder elmo-cache-folder) number strategy &optional section unseen)
+  ;; disbable cache process
+  (elmo-message-fetch-internal folder number strategy section unseen))
+
+(luna-define-method elmo-map-message-fetch ((folder elmo-cache-folder)
+					    location strategy
+					    &optional section unseen)
+  (let ((file (expand-file-name
+	       location
+	       (elmo-cache-folder-directory-internal folder))))
+    (when (file-exists-p file)
+      (insert-file-contents-as-binary file))))
+
+(luna-define-method elmo-folder-creatable-p ((folder elmo-cache-folder))
   nil)
 
-(defun elmo-cache-create-folder (spec)
-  nil)
+(luna-define-method elmo-folder-exists-p ((folder elmo-cache-folder))
+  t)
 
-(defun elmo-cache-search (spec condition &optional from-msgs)
-  (let* ((number-alist (elmo-cache-list-folder-subr spec nil t))
-	 (msgs (or from-msgs (mapcar 'car number-alist)))
+(luna-define-method elmo-folder-search ((folder elmo-cache-folder)
+					condition &optional from-msgs)
+  (let* ((msgs (or from-msgs (elmo-folder-list-messages folder)))
+	 (number-list msgs)
+	 (i 0)
 	 (num (length msgs))
-	 (i 0) case-fold-search ret-val)
+	 file
+	 matched
+	 case-fold-search)
     (while msgs
-      (if (elmo-file-field-condition-match
-	   (expand-file-name
-	    (elmo-msgid-to-cache
-	     (cdr (assq (car msgs) number-alist)))
-	    (elmo-cache-get-folder-directory spec))
-	   condition
-	   (car msgs)
-	   msgs)
-	  (setq ret-val (cons (car msgs) ret-val)))
-      (when (> num elmo-display-progress-threshold)
-	(setq i (1+ i))
-	(elmo-display-progress
-	 'elmo-cache-search "Searching..."
-	 (/ (* i 100) num)))
+      (if (and (setq file (elmo-message-file-name folder (car msgs)))
+	       (file-exists-p file)
+	       (elmo-file-field-condition-match file
+						condition
+						(car msgs)
+						number-list))
+	  (setq matched (nconc matched (list (car msgs)))))
+      (elmo-display-progress
+       'elmo-internal-folder-search "Searching..."
+       (/ (* (setq i (1+ i)) 100) num))
       (setq msgs (cdr msgs)))
-    (nreverse ret-val)))
+    matched))
 
-;;; (localdir, maildir, localnews) -> cache
-(defun elmo-cache-copy-msgs (dst-spec msgs src-spec
-				      &optional loc-alist same-number)
-  (let ((dst-dir
-	 (elmo-cache-get-folder-directory dst-spec))
-	(next-num (1+ (car (elmo-cache-list-folder-subr dst-spec t))))
-	(number-alist
-	 (elmo-msgdb-number-load
-	  (elmo-msgdb-expand-path src-spec))))
-    (if same-number (error "Not implemented"))
-    (while msgs
-      (elmo-copy-file
-       ;; src file
-       (elmo-call-func src-spec "get-msg-filename" (car msgs) loc-alist)
-       ;; dst file
-       (expand-file-name
-	(elmo-msgid-to-cache
-	 (cdr (assq (if same-number (car msgs) next-num) number-alist)))
-	dst-dir))
-      (if (and (setq msgs (cdr msgs))
-	       (not same-number))
-	  (setq next-num (1+ next-num))))
-    t))
+(luna-define-method elmo-message-file-p ((folder elmo-cache-folder) number)
+  t)
 
-(defun elmo-cache-use-cache-p (spec number)
-  nil)
+;;; To override elmo-map-folder methods.
+(luna-define-method elmo-folder-list-unreads-internal
+  ((folder elmo-cache-folder) unread-marks &optional mark-alist)
+  t)
 
-(defun elmo-cache-local-file-p (spec number)
+(luna-define-method elmo-folder-unmark-important ((folder elmo-cache-folder)
+						  numbers)
   t)
 
-(defun elmo-cache-get-msg-filename (spec number &optional loc-alist)
-  (expand-file-name
-   (elmo-cache-number-to-filename spec number)
-   (elmo-cache-get-folder-directory spec)))
+(luna-define-method elmo-folder-mark-as-important ((folder elmo-cache-folder)
+						   numbers)
+  t)
+
+(luna-define-method elmo-folder-unmark-read ((folder elmo-cache-folder)
+					     numbers)
+  t)
 
-(defalias 'elmo-cache-sync-number-alist
-  'elmo-generic-sync-number-alist)
-(defalias 'elmo-cache-list-folder-unread
-  'elmo-generic-list-folder-unread)
-(defalias 'elmo-cache-list-folder-important
-  'elmo-generic-list-folder-important)
-(defalias 'elmo-cache-commit 'elmo-generic-commit)
-(defalias 'elmo-cache-folder-diff 'elmo-generic-folder-diff)
+(luna-define-method elmo-folder-mark-as-read ((folder elmo-cache-folder)
+					      numbers)
+  t)
 
 (require 'product)
 (product-provide (provide 'elmo-cache) (require 'elmo-version))