Synopse Open Source

2013-02-03

Log to the console

By AB4327-GANDI, 2013-02-03. Open Source › mORMot Framework

Our framework features an integrated logging class, ready to be enabled for support and statistics.

For debugging purposes, it could be very handy to output the logging content to a console window.
It enables interactive debugging of a Client-Server process, for instance: you can interact with the Client, then look in real time at the server console window, and inspect which requests are processed, without the need to open the log file.

Depending on the events, colors will be used to write the corresponding information. Errors will be displayed as light red, for instance.

2013-01-28

External database speed improvements

By AB4327-GANDI, 2013-01-28. Open Source › mORMot Framework

Some major speed improvements have been made to our SynDB* units, and how they are used within the mORMot persistence layer.
It results in an amazing speed increase, in some cases.

Here are some of the optimizations how took place in the source code trunk:

SQL statement client-side cache in ODBC and OleDB;
SQL statement server-side cache for Oracle;
When inserting individual data rows in an external table, the last inserted IDs are maintained in memory instead of executing "select max(id)" - we added a new property EngineAddUseSelectMaxID to unset this optimization - we noted that this modification circumvented a known limitation of Firebird very efficiently.

Overall, I observed from x2 to x10 performance boost with simple Add() operations, using ODBC, OleDB and direct Oracle access, when compare to previous benchmarks (which were already impressive).
BATCH mode performance is less impacted, since it by-passed some of those limitations, but even in this operation mode, there is some benefits (especially with ODBC and OleDB).

Here are some results, directly generated by the supplied "15 - External DB performance" sample.

2013-01-27

Video about mORMot authentication

By AB4327-GANDI, 2013-01-27. Open Source › mORMot Framework

A new mORMot user notified on our forum that he just made a short video, about authentication and security with our framework, from the perspective of an AJAX Client. Many thanks for sharing your experiences! This video illustrate how RESTful authentication is implemented by mORMot. It compares also […]

2013-01-20

Adding JavaScript server-side support to mORMot

By AB4327-GANDI, 2013-01-20. Open Source › mORMot Framework

A long-time mORMot user and contributor just made a proposal on our forums.
He did use mORMot classes to integrate a SpiderMonkey JavaScript engine to our very fast and scaling HTTP server, including our optimized JSON serialization layer.

Today, he sent to me some of his source code, which sounds ready to be included in the main trunk!

This is a great contribution, and Pavel's goal is nothing less than offering
Delphi based, FAST multithreaded server with ORM and node.js modules compatible.

2013-01-18

Register any class for proper TObjectList serialization

By AB4327-GANDI, 2013-01-18. Open Source › mORMot Framework

Up to now, the only way of directly serializing a list of class instances as a JSON array was to use a TCollection.

In fact, objects are not alone, just like mORMots tend to have a nice family:

You have either to let your collection class inherit from the new TInterfaceCollection type, either call the TJSONSerializer.RegisterCollectionForJSON() method.
Could sounds a bit over-sized for just a list of objects.

We have just added a new feature, adding a new "ClassName":"TMyObject" field in the JSON object serialization, and allowing it to create the proper class instance on both transmission sides, therefore able to properly let TObjectList be serialized and un-serialized.

Register any TCollection type for proper JSON serialization

By AB4327-GANDI, 2013-01-18. Open Source › mORMot Framework

Due to the current implementation pattern of the TCollection type in Delphi, it was not possible to implement directly this kind of parameter.

In fact, the TCollection constructor is defined as such:

 constructor Create(ItemClass: TCollectionItemClass);

And, on the server side, we do not know which kind of TCollectionItemClass is to be passed. Therefore, the TServiceFactoryServer is unable to properly instantiate the object instances, supplying the expected item class.

The framework propose two potential solutions:

You can let your collection class inherit from the new TInterfaceCollection type;
You can call the TJSONSerializer.RegisterCollectionForJSON() method to register the collection type and its associated item class.

First solution has already been detailed in this blog.
We will now describe the second (and new) way.

2013-01-05

Domain-Driven-Design and mORMot

By AB4327-GANDI, 2013-01-05. Open Source › mORMot Framework

Implementing Domain-Driven-Design (DDD) is one goal of our mORMot framework.

We already presented this particular n-Tier architecture.

It is now time to enter deeper into the material, provide some definition and reference.
You can also search the web for reference, or look at the official web site.
A general presentation of the corresponding concepts, in the .NET world, was used as reference of this blog entry.

Stay tuned, and ride the mORMot!

2012-12-31

Enhance existing projects with mORMot

By AB4327-GANDI, 2012-12-31. Open Source › mORMot Framework

Even if mORMot will be more easily used in a project designed from scratch, it fits very well the purpose of evolving any existing Delphi project, or even creating the server side part of an AJAX application.

One benefit of such a framework is to facilitate the transition from a Client-Server architecture to a N-Tier layered pattern.