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Project Description

The LOOM.NET project aims to investigate and promote the usage of AOP in the context of the Microsoft .NET framework.

The concept of aspect-oriented programming (AOP) offers an interesting alternative for the specification of non-functional component properties (such as fault-tolerance properties or timing behaviour), as well as other crosscutting concerns. These are implemented as so-called aspects and at some point "weaved" to the other functional parts of the software.

The LOOM.NET approach is an approach that offers both: a static and a dynamic aspect weaver. The project was started in 2001 with the advent of Microsoft.Net and subsequently we released the first available aspect weaver for .NET. Like no other AOP-frameworks LOOM.NET significantly influences the Microsoft.NET AOP community.

How it works

Realized as a class library, LOOM.NET allows the language-independend definition of aspect code in the form of standard .NET classes. Both aspect weavers are fully binary compatible. Aspects written for Rapier-LOOM.NET would work with Gripper-LOOM.NET and vice versa.

An aspect class is a special .NET class with methods constructors and fields as well. At defined join points an aspect class becomes interwoven with a target class. Interweaving, strictly speaking, means that an aspect method will be interwoven with a target class method. The aspect method itself contains the aspect code and is defined within the aspect class. It has a special aspect method attribute applied. This aspect method attribute declares a method in the aspect class as an aspect method. Not necessarily every method in an aspect class is an aspect method and has this attribute applied. Methods without this attribute will not be considered for the weaving process.

A target class is a regular .NET class. The one and only restriction is that target class methods (which should become interwoven) either have to be virtual or to be defined via an interface. The weaving process will be initiated during runtime with a factory. Instead of using the new operator one uses the weavers factory method to produce interwoven objects.

Papers

Wolfgang Schult Architektur Komponentenbasierter Systeme mit LOOM - Aspekte, Muster, Werkzeuge PhD Thesis, Cuvillier, 2009. https://www.amazon.de/ARCHITEKTUR-KOMPONENTEN-BASIERTER-SYSTEME-WERKZEUGE/dp/3869550317/ref=sr_1_25?s=books&ie=UTF8&qid=1319717920&sr=1-25

Andreas Rasche and Wolfgang Schult Dynamic Updates of Graphical Components in the .NET Framework In Proceedings of Workshop on Selbstorganisierende, Adaptive, Kontextsensitive verteilte Systeme im Rahmen der GI/ITG-Tagung Kommunikation in Verteilten Systemen, Bern / Schweiz, 1. March 2007 http://www.dcl.hpi.uni-potsdam.de/papers/papers/rasche_updategraphical_saks2007.pdf

Andreas Rasche, Wolfgang Schult, and Andreas Polze Self-Adaptive Multithreaded Applications - A Case for Dynamic Aspect Weaving In Proceedings of the 4th Workshop on Adaptive and Reflective Middleware (ARM 2005), Grenoble, France - November 28, 2005 http://www.dcl.hpi.uni-potsdam.de/papers/papers/rasche_self-adaptive.pdf

Wolfgang Schult Rapier-LOOM.NET — A Dynamic Aspect Weaver for .NET Microsoft Research AOP Goes .NET Workshop, Redmond, USA, 2005 http://research.microsoft.com/apps/mobile/showpage.aspx?page=/en-us/events/aop/default.aspx

Kai Köhne, Wolfgang Schult, Andreas Polze Design by Contract in .NET Using Aspect Oriented Programming, 2005 http://www.dcl.hpi.uni-potsdam.de/people/schult/Slides/DBC.pdf

Wolfgang Schult, Andreas Polze Speed vs. Memory Usage - An Approach to Deal with Contrary Aspects. The Second AOSD Workshop on Aspects, Components, and Patterns for Infrastructure Software (ACP4IS) at the International Conference on Aspect-Oriented Software Development, Boston, Massachusetts, March 17 - 21 2003. http://www.dcl.hpi.uni-potsdam.de/cms/papers/papers/acp4is_aosd2003.pdf

Wolfgang Schult, Andreas Polze Dynamic Aspect-Weaving with .NET. Workshop zur Beherrschung nicht-funktionaler Eigenschaften in Betriebssystemen und verteilten Systemen, TU Berlin, Germany, 7-8 November 2002 http://www.dcl.hpi.uni-potsdam.de/cms/papers/papers/GI2002.ps

Wolfgang Schult, Andreas Polze Aspect-Oriented Programming with C# and .NET. In Proceedings of International Symposium on Object-oriented Real-time distributed Computing (ISORC) 2002, pp. 241-248, Washington D.C., April 2002. http://www.dcl.hpi.uni-potsdam.de/cms/papers/papers/isorc2002.pdf

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The LOOM.NET project aims to investigate and promote the usage of AOP in the context of the Microsoft .NET framework.

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