Synopse Open Source

It will probably change its name (since it won't use only SQlite3 as database), to become mORMot - could be an acronym for "Manage Object Relational Mapping Over Tables", or whatever you may think of...

We'll still rely on SQLite3 on the server, but a dedicated mechanism will allow to access via OleDB any remote database, and mix those tables content with the native ORM tables of the framework. A flexible Virtual Tables and column mapping will allow any possible architecture: either a new project in pure ORM, either a project relying on an existing database with its own table layout.

2011-07-22

SynDBSQLite3: SQLite3 direct access

By AB4327-GANDI, 2011-07-22. Open Source › Open Source libraries

For our ORM framework, we implemented an efficient SQLite3 wrapper, joining statically (i.e. without any external dll) the SQLite3 engine to the executable. SQLite3 is in fact used as the DB kernel of the framework. For instance, thanks to its unique virtual table mechanism, even tables in other databases (like Oracle or MSSQL) are available as if they were SQLite3 tables.

We just made this wrapper independent from our ORM, in a new dedicated unit, named SynSQLite3.pas.

It was an easy task to let this unit be called from our SynDB database abstract classes.

2011-07-04

WinINet vs WinHTTP

By AB4327-GANDI, 2011-07-04. Open Source › mORMot Framework

If you want to implement an HTTP client access in your application, you may consider several choices:

Use the provided Indy components;
Use third-party components like Synapse, ICS or your own WinSock-based wrapper;
Use WinINet;
Use WinHTTP.

For our ORM, we tried to avoid external dependencies, and did not have the need of all Indy's features and overhead.
We fist wrote our own WinSock wrapper, then tried out WinInet.

When used on our testing benchmark, we found out that WinINet was dead slow.
Then we tried WinHTTP, the new API provided by Microsoft, and we found out this was blazing fast. As fast as direct WinSock access, without the need of writing all the wrapper code.

2011-07-03

"Sharding" or "Share nothing" architecture

By AB4327-GANDI, 2011-07-03. Open Source › mORMot Framework

Here is what wikipedia states at http://en.wikipedia.org/wiki/Shared_nothing_architecture:

A shared nothing architecture (SN) is a distributed computing architecture in which each node is independent and self-sufficient, and there is no single point of contention across the system. People typically contrast SN with systems that keep a large amount of centrally-stored state information, whether in a database, an application server, or any other similar single point of contention.

This is just one approach of "sharding". Sharding is indeed related to a shared nothing architecture - once sharded, each shard can live in a totally separate logical schema instance.
"I sharded, therefore it scales"...

You can do this in Delphi... and opens a new world of scaling opportunities... Just as Google, Facebook, or eBay do...

2011-07-02

Synopse PDF Engine 1.14

By AB4327-GANDI, 2011-07-02. Open Source › Synopse PDF engine

Our SynPdf unit has been updated to the 1.14 version. Some enhancements: new SetCMYKFillColor and SetCMYKStrokeColor methods for TPdfCanvas now handles EMR_POLYBEZIER* commands in conversion from meta file content fixed EZeroDivided error when enumerating SetWindowExtEx(szlExtent(0,0)) some […]

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Is Object-Relational Mapping the Paradise of Computer Science?

By AB4327-GANDI, 2011-07-02. Open Source › mORMot Framework

There is a well known syndrome around, against ORM.

Do you remember The Vietnam of Computer Science article?

It is worth reading... and commenting.
Sounds a bit outdated by now. Tempus fugit!