February 2006 - bknr-devel@common-lisp.net

Re: [bknr-devel] Warning: Encoding destroyed object
by Kamen TOMOV 27 Feb '06

27 Feb '06

On Thu, Feb 23 2006, Hans Hübner wrote: > Hi, > > I cannot reproduce this, at least not from what you describe. The > warning is the result of a reference to a deleted object being > written to the transaction log, presumable referenced from a slot of > another object. Can you provide me with an isolated test case? Dear Hans, Sorry of not responding earlier. Here is an isolated test case: (asdf:oos 'asdf:load-op :bknr-impex) (asdf:oos 'asdf:load-op :bknr-datastore) (defpackage some-example (:use #:common-lisp #:bknr.impex #:puri #:bknr.indices #:bknr.datastore)) (in-package :some-example) (define-persistent-class obj (store-object) ()) (deftransaction del (obj) (delete-object obj)) (make-instance 'mp-store :directory "/tmp/tmp-store/" :subsystems (list (make-instance 'store-object-subsystem))) (del (make-object 'obj :name "a test" :type nil)) I noticed that if "del" is not a transaction it does not signal a warning. I am not sure why is so. Beside delete-object I would like to physically delete the file there. Thanks. Regards, -- Kamen TOMOV

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[bknr-devel] Warning: Encoding destroyed object
by Kamen TOMOV 23 Feb '06

23 Feb '06

Hi, I get this warning every time I delete a blob from the store. Could you tell me why is that? Thank you. -- Kamen TOMOV

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Re: [bknr-devel] SBCL port samll fixes
by Tchadvar Roussanov 13 Feb '06

13 Feb '06

Hans, In order to compile bknr/src/web/handlers.lisp with the latest cxml and sbcl, I either have to apply the change from svn to with-element macro in cxml/xml/unparse.lisp: (defmacro with-element (qname &body body) ;; XXX Statt qname soll man in zukunft auch mal (lname prefix) angeben ;; koennen. Hat aber Zeit bis DOM 2. - (when (listp qname) - (destructuring-bind (n) qname - (setf qname n))) `(invoke-with-element (lambda () ,@body) ,qname)) or change the handlers.lisp this way: (defmethod handle-object ((handler xml-object-list-handler) object req) - (cxml:with-element (xml-object-list-handler-toplevel-element-name handler) - (dolist (object (object-list-handler-get-objects handler object req)) - (object-list-handler-show-object-xml handler object req)))) + (let ((element-name (xml-object-list-handler-toplevel-element-name handler))) + (cxml:with-element element-name + (dolist (object (object-list-handler-get-objects handler object req)) + (object-list-handler-show-object-xml handler object req))))) In other words move the evaluation of xml-object-list-handler-toplevel-element-name out of the macro expansion. I think the two changes are equivalent but the second one has the advantage not to require to maintain changes to the third party library. Am I missing something? Tchavdar

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[bknr-devel] SBCL port samll fixes
by Tchadvar Roussanov 09 Feb '06

09 Feb '06

Hans, This is a small patch for init.lisp and some fixes to make sbcl compiler happy with 'defconstant'. Tchavdar

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[bknr-devel] SBCL and OpenMCL ports done properly
by Hoan Ton-That 09 Feb '06

09 Feb '06

Hey everyone, I've ported the datastore to SBCL and OpenMCL properly. I'm sorry to everyone else who has been kept waiting. The format of the transaction log in UNCHANGED. I've tested loading, creating, and snapshotting across CMUCL, SBCL and OpenMCL with all primitive datatypes (array, integer, symbol, string, list, hash-table, single and double floats), as well as other compound objects. The patch is against the latest svn repository. Apologies again for this not being up sooner. Hans, if I were to change one thing about the current transaction log format, it would be the encoding of floats and double-floats. I think it would be better to use integer-decode-float (because it is in the hyperspec), than all these read-time conditionals. I couldn't find a `make-single-float' and `make-double-float' for OpenMCL. I can easily do this for you and I'll even write a converter if you wish. Hoan

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[bknr-devel] SBCL port
by Tchadvar Roussanov 04 Feb '06

04 Feb '06

Hi, I am trying to compile BKNR with the latest SBCL release. Till now I had to update almost all third party libraries to their latest versions. Is there are plans to update the versions of these packages in the SVN tree? Or move them out and use asdf install to resolve dependencies? I also notice in the SVN repository that there is ongoing SBCL porting effort. What is the current status of it? I am willing to help with this port as much as I can. Thank you.

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Re: [bknr-devel] string multiple-slot indices
by Hans Hübner 02 Feb '06

02 Feb '06

Hi Kamen, we have used the array-index in an application that stored map locations referenced by a coordinate. The coordinate is stored in x and y slots of the objects, and we wanted to retrieve objects by coordinate, without writing a special purpose index for the application. The array-index class is only good to index objects with multiple slots that have integral values. There is nothing I can see that precludes other multiple-slot indices which would accept string values, but that would be more involved to implement. The dimensions of the index array are required to set up the array that holds the index. I hope that this answers your question. Cheers, Hans

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