Sorry,
This email not is public list, are is private to manuel lemos.

Best Resgards,
Alessander Thomaz


At 15:25 05/12/02 -0200, you wrote:
>Fala Manuel,
>Nossa...
>foi bom me mandar esse email...
>lembrei que tenho que traduzir a apresentação do metal..
>
>vou ver se consigo essa semana,
>ou antes da proxima reuniao que é semana que vem..
>
>alguma coisa que queira inserir na apresentação?
>
>[]'s Alessander
>
>
>At 15:14 05/12/02 -0200, you wrote:
> >Hello,
> >
> >Finally I made time to release a full blown application based on MetaL
> >compiler persistence module.
> >
> >Here is the release announcement that may also be found on the site:
> >
> >http://www.meta-language.net/news-2002-12-05-metastorage.html
> >
> > _________________________________________________________________
> >
> >Released Metastorage generator
> >Manuel Lemos, 2002-12-05 16:11:44 GMT
> >
> >Metastorage is an application that is capable of generating
> >persistence layer APIs. It takes a component definition defined in the
> >Component Persistence Markup Language (CPML), a XML based format, and
> >generates classes and storage schemas in a given target programming
> >language.
> >
> >Using CPML, developers can focus their efforts on the modeling of data
> >structures that hold the information and the relationships between the
> >entities that their applications deal with. Metastorage takes care of
> >generating all the necessary code to store and retrieve such data
> >structures from persistent storage containers like relational
> >databases.
> >
> >The main goal of Metastorage is to drastically reduce the time to
> >develop applications that traditionally use on SQL based relational
> >databases.
> >
> >The generated APIs consist of a sets of classes that provide an Object
> >Oriented interface to the objects of the classes modeled using CPML.
> >
> >The generated APIs are also capable of installing the data schema in
> >the persistence container, which in the case of a relational database
> >is the set of tables that will hold the persistent objects. This
> >completely eliminates the need to write any SQL queries manually.
> >CPML is independent of the type of persistent container. This means
> >that while it can be used to model classes of persistent objects that
> >may be stored in relational databases, such objects may as well be
> >stored in other types of persistence containers.
> >
> >For instance, if an application needs to move a directory of objects
> >with user information from a relational database to a LDAP server to
> >increase the application scalability, the same CPML component
> >definition would be used. Metastorage would then generate classes
> >objects that implement the same API for interfacing with a LDAP server
> >that is compatible with the API generated to interface with relational
> >databases. This make the migration process easier and with reduced
> >risks.
> >
> >Another possible benefit of the persistence container independence of
> >the APIs generated by Metastorage, is the case where an application
> >may need to run in environments where a SQL based database server is
> >not available. In that case the same API could be generated to store
> >persistent objects in flat file databases or plain XML files.
> >
> >For now, the current version of Metastorage only supports the
> >generation of PHP code based on the database independent Metabase API.
> >This means that it may also interface with PEAR::MDB database
> >abstraction layer using its built-in Metabase API wrapper. In
> >consequence, many types of relational databases are already supported.
> >
> >Since this is the first release of Metastorage, there is plenty of
> >room for improvement in the possibilities of the generated persistence
> >APIs and the level of optimization of the generated code. In the
> >future it will be supported other languages besides PHP, other
> >database APIs besides Metabase and other persistence containers
> >besides relational databases.
> >
> >Metastorage is based on MetaL compiler persistence module. Like MetaL,
> >Metastorage is Open Source and is distributed with BSD like software
> >license. Downloadable archives and documentation with an example of
> >component definition are available from the MetaL site.
> >
> >
> >--
> >
> >Regards,
> >Manuel Lemos
> >
> >
> >
> >
> >To unsubscribe from this group, send an email to:
> >metal-dev-unsubscribe@yahoogroups.com
> >
> >
> >
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>
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