;;======================================================================
;; Copyright 2006-2012, Matthew Welland.
;;
;; This program is made available under the GNU GPL version 2.0 or
;; greater. See the accompanying file COPYING for details.
;;
;; This program is distributed WITHOUT ANY WARRANTY; without even the
;; implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;; PURPOSE.
;;======================================================================
;;======================================================================
;; A hash of hashes that can be kept in sync by sending minial deltas
;;======================================================================
(use format)
(use srfi-1 srfi-69)
(declare (unit synchash))
(declare (uses db))
(declare (uses server))
(include "db_records.scm")
(define (synchash:make)
(make-hash-table))
;; given an alist of objects '((id obj) ...)
;; 1. remove unchanged objects from the list
;; 2. create a list of removed objects by id
;; 3. remove removed objects from synchash
;; 4. replace or add new or changed objects to synchash
;;
(define (synchash:get-delta indat synchash)
(let ((deleted '())
(changed '())
(found '())
(orig-keys (hash-table-keys synchash)))
(for-each
(lambda (item)
(let* ((id (car item))
(dat (cadr item))
(ref (hash-table-ref/default synchash id #f)))
(if (not (equal? dat ref)) ;; item changed or new
(begin
(set! changed (cons item changed))
(hash-table-set! synchash id dat)))
(set! found (cons id found))))
indat)
(for-each
(lambda (id)
(if (not (member id found))
(begin
(set! deleted (cons id deleted))
(hash-table-delete! synchash id))))
orig-keys)
(list changed deleted)
;; (list indat '()) ;; just for debugging
))
;; (cdb:remote-run db:get-keys #f)
;; (cdb:remote-run db:get-num-runs #f "%")
;; (cdb:remote-run db:get-runs #f runnamepatt numruns *start-run-offset* keypatts)
;;
;; keynum => the field to use as the unique key (usually 0 but can be other field)
;;
(define (synchash:client-get proc synckey keynum synchash . params)
(let* ((data (apply cdb:remote-run synchash:server-get #f proc synckey keynum params))
(newdat (car data))
(removs (cadr data))
(myhash (hash-table-ref/default synchash synckey #f)))
(if (not myhash)
(begin
(set! myhash (make-hash-table))
(hash-table-set! synchash synckey myhash)))
(for-each
(lambda (item)
(let ((id (car item))
(dat (cadr item)))
;; (debug:print-info 2 "Processing item: " item)
(hash-table-set! myhash id dat)))
newdat)
(for-each
(lambda (id)
(hash-table-delete! myhash id))
removs)
synchash))
(define *synchashes* (make-hash-table))
(define (synchash:server-get db proc synckey keynum . params)
;; (debug:print-info 2 "synckey: " synckey ", keynum: " keynum ", params: " params)
(let* ((synchash (hash-table-ref/default *synchashes* synckey #f))
(newdat (apply (case proc
((db:get-runs) db:get-runs)
((db:get-tests-for-runs) db:get-tests-for-runs)
(else print))
db params))
(postdat #f)
(make-indexed (lambda (x)
(list (vector-ref x keynum) x))))
;; Now process newdat based on the query type
(set! postdat (case proc
((db:get-runs)
;; (debug:print-info 2 "Get runs call")
(let ((header (vector-ref newdat 0))
(data (vector-ref newdat 1)))
;; (debug:print-info 2 "header: " header ", data: " data)
(cons (list "header" header) ;; add the header keyed by the word "header"
(map make-indexed data)))) ;; add each element keyed by the keynum'th val
(else
;; (debug:print-info 2 "Non-get runs call")
(map make-indexed newdat))))
;; (debug:print-info 2 "postdat: " postdat)
(if (not synchash)
(begin
(set! synchash (make-hash-table))
(hash-table-set! *synchashes* synckey synchash)))
(synchash:get-delta postdat synchash)))