July 2004 - cl-prevalence-cvs@common-lisp.net

[cl-prevalence-cvs] CVS update: cl-prevalence/src/prevalence.lisp
by Sven Van Caekenberghe 13 Jul '04

13 Jul '04

Update of /project/cl-prevalence/cvsroot/cl-prevalence/src In directory common-lisp.net:/tmp/cvs-serv5940/src Modified Files: prevalence.lisp Log Message: snapshot & backup were broken (thanks to eric blood) Date: Tue Jul 13 03:30:28 2004 Author: scaekenberghe Index: cl-prevalence/src/prevalence.lisp diff -u cl-prevalence/src/prevalence.lisp:1.5 cl-prevalence/src/prevalence.lisp:1.6 --- cl-prevalence/src/prevalence.lisp:1.5 Mon Jun 28 04:56:35 2004 +++ cl-prevalence/src/prevalence.lisp Tue Jul 13 03:30:28 2004 @@ -1,6 +1,6 @@ ;;;; -*- mode: Lisp -*- ;;;; -;;;; $Id: prevalence.lisp,v 1.5 2004/06/28 11:56:35 scaekenberghe Exp $ +;;;; $Id: prevalence.lisp,v 1.6 2004/07/13 10:30:28 scaekenberghe Exp $ ;;;; ;;;; Object Prevalence in Common Lisp ;;;; @@ -238,14 +238,14 @@ (snapshot (get-snapshot system))) (close-open-streams system) (when (probe-file snapshot) - (copy-file snapshot (merge-pathnames (make-pathname :name (get-snapshot-filename timetag) + (copy-file snapshot (merge-pathnames (make-pathname :name (get-snapshot-filename system timetag) :type (get-file-extension system)) snapshot))) (with-open-file (out snapshot :direction :output :if-does-not-exist :create :if-exists :supersede) (funcall (get-serializer system) (get-root-objects system) out (get-serialization-state system))) (when (probe-file transaction-log) - (copy-file transaction-log (merge-pathnames (make-pathname :name (get-transaction-log-filename timetag) + (copy-file transaction-log (merge-pathnames (make-pathname :name (get-transaction-log-filename system timetag) :type (get-file-extension system)) transaction-log)) (delete-file transaction-log)))) @@ -255,10 +255,10 @@ (let* ((timetag (timetag)) (transaction-log (get-transaction-log system)) (snapshot (get-snapshot system)) - (transaction-log-backup (merge-pathnames (make-pathname :name (get-transaction-log-filename timetag) + (transaction-log-backup (merge-pathnames (make-pathname :name (get-transaction-log-filename system timetag) :type (get-file-extension system)) (or directory transaction-log))) - (snapshot-backup (merge-pathnames (make-pathname :name (get-snapshot-filename timetag) + (snapshot-backup (merge-pathnames (make-pathname :name (get-snapshot-filename system timetag) :type (get-file-extension system)) (or directory snapshot)))) (close-open-streams system)

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[cl-prevalence-cvs] CVS update: public_html/index.html
by Sven Van Caekenberghe 08 Jul '04

08 Jul '04

Update of /project/cl-prevalence/cvsroot/public_html In directory common-lisp.net:/tmp/cvs-serv10850 Modified Files: index.html Log Message: added some personal info as well as a reference to a paper Date: Thu Jul 8 12:59:14 2004 Author: scaekenberghe Index: public_html/index.html diff -u public_html/index.html:1.5 public_html/index.html:1.6 --- public_html/index.html:1.5 Thu Jun 24 00:23:40 2004 +++ public_html/index.html Thu Jul 8 12:59:14 2004 @@ -13,10 +13,23 @@ <h1>CL-PREVALENCE</h1> </div> - <p>CL-PREVALENCE is an implementation of <a href="http://www.prevayler.org">Object Prevalence</a> for Common Lisp.</p> + <p> + CL-PREVALENCE is an implementation of <a href="http://www.prevayler.org">Object Prevalence</a> for Common Lisp. + It was written by and is being maintained by <a href="http://homepage.mac.com/svc">Sven Van Caekenberghe</a>. + CL-PREVALENCE is using <a href="http://common-lisp.net/project/s-xml">S-XML</a> for the XML serialization + protocol (there is also a more Lisp-like s-expression-based serialization protocol). + </p> <p> - Object Prevalence is a simple but interesting concept first proposed by Klaus Wuestefeld in 2001. IBM developerWorks has a reasonable <a href="http://www-106.ibm.com/developerworks/library/wa-objprev/">Introduction to Object Prevalence</a> article. The main Java implementation is called <a href="http://www.prevayler.org">Prevayler</a>, with a (chaotic) wiki site with lots of information and discussions. Basically, the idea is this: + Object Prevalence is a simple but interesting concept first proposed by Klaus Wuestefeld in 2001. + IBM developerWorks has a reasonable + <a href="http://www-106.ibm.com/developerworks/library/wa-objprev/">Introduction to Object Prevalence</a> article. + The main Java implementation is called <a href="http://www.prevayler.org">Prevayler</a>, + with a (chaotic) wiki site with lots of information and discussions. + The following academic paper seems to describe the most essential features of Object Prevalence, without naming it as such: + <a href="http://birrell.org/andrew/papers/024-DatabasesPaper.pdf">A Simple and Efficient Implementation for Small Databases</a> + by Birrell, Jones, and Wobber [1987]. + Basically, the idea is this: </p> <ul> <li>Most databases are only a couple of hundreds of megabytes big, often even less.</li> @@ -53,7 +66,8 @@ <p> You can download the LLGPL source code and documentation as <a href="cl-prevalence.tgz">cl-prevalence.tgz</a> - (signature: <a href="cl-prevalence.tgz.asc">cl-prevalence.tgz.asc</a>) + (signature: <a href="cl-prevalence.tgz.asc">cl-prevalence.tgz.asc</a> for which the public key can be found + in the <a href="http://common-lisp.net/keyring.asc">common-lisp.net keyring</a>) (build and/or install with ASDF). There is also <a href="http://common-lisp.net/cgi-bin/viewcvs.cgi/?cvsroot=cl-prevalence">CVS</a> access. </p> @@ -81,7 +95,7 @@ <li><a href="http://common-lisp.net/mailman/listinfo/cl-prevalence-announce">CL-PREVALENCE-ANNOUNCE mailing list info</a></li> </ul> - <p>CVS version $Id: index.html,v 1.5 2004/06/24 07:23:40 scaekenberghe Exp $</p> + <p>CVS version $Id: index.html,v 1.6 2004/07/08 19:59:14 scaekenberghe Exp $</p> <div class="footer"> <p>Back to <a href="http://common-lisp.net/">Common-lisp.net</a>.</p>

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[cl-prevalence-cvs] CVS update: cl-prevalence/src/debug-prevalence.lisp
by Sven Van Caekenberghe 05 Jul '04

05 Jul '04

Update of /project/cl-prevalence/cvsroot/cl-prevalence/src In directory common-lisp.net:/tmp/cvs-serv577/src Modified Files: debug-prevalence.lisp Log Message: forgot to follow a refactoring Date: Mon Jul 5 14:22:08 2004 Author: scaekenberghe Index: cl-prevalence/src/debug-prevalence.lisp diff -u cl-prevalence/src/debug-prevalence.lisp:1.1.1.1 cl-prevalence/src/debug-prevalence.lisp:1.2 --- cl-prevalence/src/debug-prevalence.lisp:1.1.1.1 Sun Jun 20 12:13:38 2004 +++ cl-prevalence/src/debug-prevalence.lisp Mon Jul 5 14:22:08 2004 @@ -1,6 +1,6 @@ ;;;; -*- Mode: LISP -*- ;;;; -;;;; $Id: debug-prevalence.lisp,v 1.1.1.1 2004/06/20 19:13:38 scaekenberghe Exp $ +;;;; $Id: debug-prevalence.lisp,v 1.2 2004/07/05 21:22:08 scaekenberghe Exp $ ;;;; ;;;; Some debugging routines for CL-PREVALENCE ;;;; @@ -24,7 +24,7 @@ "Print the transaction objects making up the transaction log of system to t" (with-open-file (in (get-transaction-log system) :direction :input) (loop - (let ((transaction (deserialize-xml in *serialization-state*))) + (let ((transaction (deserialize-xml in (get-serialization-state system)))) (if (null transaction) (return) (format t "~a~%" transaction))))) @@ -41,7 +41,7 @@ (let (transactions) (with-open-file (in (get-transaction-log system) :direction :input) (loop - (let ((transaction (deserialize-xml in *serialization-state*))) + (let ((transaction (deserialize-xml in (get-serialization-state system)))) (if (null transaction) (return) (push transaction transactions)))))

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