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<TITLE>Data::Storage</TITLE> |
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<LI><A HREF="#name">NAME</A></LI> |
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<LI><A HREF="#synopsis">SYNOPSIS</A></LI> |
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<UL> |
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<LI><A HREF="#note">NOTE</A></LI> |
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<LI><A HREF="#requirements">REQUIREMENTS</A></LI> |
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<LI><A HREF="#description">DESCRIPTION</A></LI> |
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<LI><A HREF="#authors / copyright">AUTHORS / COPYRIGHT</A></LI> |
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<LI><A HREF="#acknowledgements">ACKNOWLEDGEMENTS</A></LI> |
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<LI><A HREF="#support / warranty">SUPPORT / WARRANTY</A></LI> |
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<LI><A HREF="#todo">TODO</A></LI> |
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<UL> |
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<LI><A HREF="#handle the following errors/cases:">Handle the following errors/cases:</A></LI> |
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<UL> |
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<LI><A HREF="#dbierror [tangram]: dbd::mysql::st execute failed: unknown column 't1.requestdump' in 'field list'">``DBI-Error [Tangram]: DBD::mysql::st execute failed: Unknown column 't1.requestdump' in 'field list'''</A></LI> |
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<LI><A HREF="#compare schema (structure diff) with database ...">Compare schema (structure diff) with database ...</A></LI> |
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</UL> |
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<LI><A HREF="#introduce some features:">Introduce some features:</A></LI> |
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<LI><A HREF="#links:">Links:</A></LI> |
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<!-- INDEX END --> |
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<HR> |
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<P> |
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<H1><A NAME="name">NAME</A></H1> |
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<P>Data::Storage - Interface for accessing various Storage implementations for Perl in an independent way</P> |
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<P> |
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<HR> |
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<H1><A NAME="synopsis">SYNOPSIS</A></H1> |
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<PRE> |
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... the basic way:</PRE> |
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<PRE> |
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... via inheritance: |
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</PRE> |
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<PRE> |
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use Data::Storage; |
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my $proxyObj = new HttpProxy; |
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$proxyObj->{url} = $url; |
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$proxyObj->{payload} = $content; |
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$self->{storage}->insert($proxyObj);</PRE> |
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<PRE> |
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|
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use Data::Storage; |
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my $proxyObj = HttpProxy->new( |
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url => $url, |
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payload => $content, |
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); |
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$self->{storage}->insert($proxyObj);</PRE> |
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<P> |
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<H2><A NAME="note">NOTE</A></H2> |
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<P>This module heavily relies on DBI and Tangram, but adds a lot of additional bugs and quirks. |
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Please look at their documentation and/or this code for additional information.</P> |
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<P> |
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<HR> |
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<H1><A NAME="requirements">REQUIREMENTS</A></H1> |
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<P>For full functionality: |
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DBI from CPAN |
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Tangram from CPAN |
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Class::Tangram from CPAN |
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MySQL::Diff from <A HREF="http://adamspiers.org/computing/mysqldiff/">http://adamspiers.org/computing/mysqldiff/</A> |
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... and all their dependencies</P> |
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<P> |
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<HR> |
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<H1><A NAME="description">DESCRIPTION</A></H1> |
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<P>Data::Storage is module for a accessing various ``data structures'' stored inside |
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various ``data containers''. It sits on top of DBI and/or Tangram.</P> |
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<P> |
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<HR> |
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<H1><A NAME="authors / copyright">AUTHORS / COPYRIGHT</A></H1> |
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<P>The Data::Storage module is Copyright (c) 2002 Andreas Motl. |
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All rights reserved.</P> |
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<P>You may distribute it under the terms of either the GNU General Public |
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License or the Artistic License, as specified in the Perl README file.</P> |
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<P> |
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<HR> |
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<H1><A NAME="acknowledgements">ACKNOWLEDGEMENTS</A></H1> |
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<P>Larry Wall for Perl, Tim Bunce for DBI, Jean-Louis Leroy for Tangram and Set::Object, |
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Sam Vilain for Class::Tangram, Adam Spiers for MySQL::Diff and all contributors.</P> |
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<P> |
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<HR> |
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<H1><A NAME="support / warranty">SUPPORT / WARRANTY</A></H1> |
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<P>Data::Storage is free software. IT COMES WITHOUT WARRANTY OF ANY KIND.</P> |
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<P> |
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<HR> |
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<H1><A NAME="todo">TODO</A></H1> |
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<P> |
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<H2><A NAME="handle the following errors/cases:">Handle the following errors/cases:</A></H2> |
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<P> |
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<H3><A NAME="dbierror [tangram]: dbd::mysql::st execute failed: unknown column 't1.requestdump' in 'field list'">``DBI-Error [Tangram]: DBD::mysql::st execute failed: Unknown column 't1.requestdump' in 'field list'''</A></H3> |
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<PRE> |
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... occours when operating on object-attributes not introduced yet: |
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this should be detected and appended/replaced through: |
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"Schema-Error detected, maybe (just) an inconsistency. |
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Please check if your declaration in schema-module "a" matches structure in database "b" or try to run" |
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db_setup.pl --dbkey=import --action=deploy</PRE> |
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<P> |
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<H3><A NAME="compare schema (structure diff) with database ...">Compare schema (structure diff) with database ...</A></H3> |
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<PRE> |
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... when issuing "db_setup.pl --dbkey=import --action=deploy" |
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on a database with an already deployed schema, use an additional "--update" then |
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to lift the schema inside the database to the current declared schema. |
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You will have to approve removals and changes on field-level while |
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new objects and new fields are introduced silently without any interaction needed. |
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In future versions there may be additional options to control silent processing of |
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removals and changes. |
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See this CRUD-table applying to the actions occouring on Classes and Class variables when deploying schemas, |
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don't mix this up with CRUD-actions on Objects, these are already handled by (e.g.) Tangram itself. |
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Classes: |
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C create -> yes, handled automatically |
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R retrieve -> no, not subject of this aspect since it is about deployment only |
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U update -> yes, automatically for Class meta-attributes, yes/no for Class variables (look at the rules down here) |
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D delete -> yes, just by user-interaction |
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Class variables: |
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C create -> yes, handled automatically |
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R retrieve -> no, not subject of this aspect since it is about deployment only |
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U update -> yes, just by user-interaction; maybe automatically if it can be determined that data wouldn't be lost |
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D delete -> yes, just by user-interaction |
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</PRE> |
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<PRE> |
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It's all about not to be able to loose data simply while this is in pre-alpha stage. |
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And loosing data by being able to modify and redeploy schemas easily is definitely quite easy.</PRE> |
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<PRE> |
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As we can see, creations of Classes and new Class variables is handled |
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automatically and this is believed to be the most common case under normal circumstances.</PRE> |
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<P> |
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<H2><A NAME="introduce some features:">Introduce some features:</A></H2> |
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<PRE> |
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- Get this stuff together with UML (Unified Modeling Language) and/or standards from ODMG. |
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- Make it possible to load/save schemas in XMI (XML Metadata Interchange), |
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which seems to be most commonly used today, perhaps handle objects with OIFML. |
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Integrate/bundle this with a web-/html-based UML modeling tool or |
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some other interesting stuff like the "Co-operative UML Editor" from Uni Darmstadt. (web-/java-based) |
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- Enable Round Trip Engineering. Keep code and diagrams in sync. Don't annoy/bother the programmers. |
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- Add some more handlers: |
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- look at DBD::CSV, Text::CSV, XML::CSV, XML::Excel |
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- Add some more locations/locators: |
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- PerlDAV: <A HREF="http://www.webdav.org/perldav/">http://www.webdav.org/perldav/</A> |
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- Move to t3, use InCASE</PRE> |
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<P> |
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<H3><A NAME="links:">Links:</A></H3> |
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<PRE> |
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Specs: |
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UML 1.3 Spec: <A HREF="http://cgi.omg.org/cgi-bin/doc?ad/99-06-08.pdf">http://cgi.omg.org/cgi-bin/doc?ad/99-06-08.pdf</A> |
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XMI 1.1 Spec: <A HREF="http://cgi.omg.org/cgi-bin/doc?ad/99-10-02.pdf">http://cgi.omg.org/cgi-bin/doc?ad/99-10-02.pdf</A> |
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XMI 2.0 Spec: <A HREF="http://cgi.omg.org/docs/ad/01-06-12.pdf">http://cgi.omg.org/docs/ad/01-06-12.pdf</A> |
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ODMG: <A HREF="http://odmg.org/">http://odmg.org/</A> |
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OIFML: <A HREF="http://odmg.org/library/readingroom/oifml.pdf">http://odmg.org/library/readingroom/oifml.pdf</A></PRE> |
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<PRE> |
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CASE Tools: |
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Rational Rose (commercial): <A HREF="http://www.rational.com/products/rose/">http://www.rational.com/products/rose/</A> |
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Together (commercial): <A HREF="http://www.oi.com/products/controlcenter/index.jsp">http://www.oi.com/products/controlcenter/index.jsp</A> |
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InCASE - Tangram-based Universal Object Editor |
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Sybase PowerDesigner: <A HREF="http://www.sybase.com/powerdesigner">http://www.sybase.com/powerdesigner</A> |
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</PRE> |
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<PRE> |
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UML Editors: |
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Fujaba (free, university): <A HREF="http://www.fujaba.de/">http://www.fujaba.de/</A> |
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ArgoUML (free): <A HREF="http://argouml.tigris.org/">http://argouml.tigris.org/</A> |
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Poseidon (commercial): <A HREF="http://www.gentleware.com/products/poseidonDE.php3">http://www.gentleware.com/products/poseidonDE.php3</A> |
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Co-operative UML Editor (research): <A HREF="http://www.darmstadt.gmd.de/concert/activities/internal/umledit.html">http://www.darmstadt.gmd.de/concert/activities/internal/umledit.html</A> |
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Metamill (commercial): <A HREF="http://www.metamill.com/">http://www.metamill.com/</A> |
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Violet (university, research, education): <A HREF="http://www.horstmann.com/violet/">http://www.horstmann.com/violet/</A> |
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PyUt (free): <A HREF="http://pyut.sourceforge.net/">http://pyut.sourceforge.net/</A> |
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(Dia (free): <A HREF="http://www.lysator.liu.se/~alla/dia/">http://www.lysator.liu.se/~alla/dia/</A>) |
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UMLet (free, university): <A HREF="http://www.swt.tuwien.ac.at/umlet/index.html">http://www.swt.tuwien.ac.at/umlet/index.html</A> |
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Voodoo (free): <A HREF="http://voodoo.sourceforge.net/">http://voodoo.sourceforge.net/</A> |
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Umbrello UML Modeller: <A HREF="http://uml.sourceforge.net/">http://uml.sourceforge.net/</A></PRE> |
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<PRE> |
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UML Tools: |
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<A HREF="http://www.objectsbydesign.com/tools/umltools_byPrice.html">http://www.objectsbydesign.com/tools/umltools_byPrice.html</A></PRE> |
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<PRE> |
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Further readings: |
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<A HREF="http://www.google.com/search?q=web+based+uml+editor&">http://www.google.com/search?q=web+based+uml+editor&</A>;hl=en&lr=&ie=UTF-8&oe=UTF-8&start=10&sa=N |
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<A HREF="http://www.fernuni-hagen.de/DVT/Aktuelles/01FHHeidelberg.pdf">http://www.fernuni-hagen.de/DVT/Aktuelles/01FHHeidelberg.pdf</A> |
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<A HREF="http://www.enhyper.com/src/documentation/">http://www.enhyper.com/src/documentation/</A> |
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<A HREF="http://cis.cs.tu-berlin.de/Dokumente/Diplomarbeiten/2001/skinner.pdf">http://cis.cs.tu-berlin.de/Dokumente/Diplomarbeiten/2001/skinner.pdf</A> |
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<A HREF="http://citeseer.nj.nec.com/vilain00diagrammatic.html">http://citeseer.nj.nec.com/vilain00diagrammatic.html</A> |
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<A HREF="http://archive.devx.com/uml/articles/Smith01/Smith01-3.asp">http://archive.devx.com/uml/articles/Smith01/Smith01-3.asp</A></PRE> |
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