CASE STUDY ON XADL

Is it someone’s name? The cases profiled range in size and scope, and Links do not have types because links do not have any architectural semantics. These mappings are given with Signature-Interface Mappings , analogous to the InterfaceInstanceMappings described above for the instance schema. As you can see, the endpoints of the links are interfaces, and interfaces are the “gateway” to the outside world for both components and connectors. In addition to the hierarchical relationships here, we make a few additional assumptions about how these elements can be arranged. If links had semantics, they would be connectors.

Certainly, C1 and C2 share something in common, most likely a behavior or an implementation. Lean Management Case Studies. When a type system is introduced, however, things become more complicated. C1 and C2 should each have the same number of interfaces, and those interfaces should be of the same type. Learn how business are using Microsoft Azure to address opportunities in building scalable and reliable Big Data, Consumer, Enterprise,

case study on xadl

Others adopt a types-as-constraints model, where a type is simply a constraint over elements; any element meeting that constraint is “of that type” this implies that a single element like a component or connector could potentially have many, many types.

For the balance of this discussion, we will talk about the subarchitecture of a component, but what is detailed here can be equally applied to connectors with subarchitecture. Each ArchInstance element corresponds to one conceptual architecture. Because types are seen as independent entities, not necessarily bound to a single architecture or level of the hierarchy, they are grouped up in this fashion. To elaborate, we will model the structure design-time of the same architecture we modeled above: How do two parties sharing marked-up documents come to an agreement on what elements are allowed, and where?

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That is, all data that passes from one component or connector instance to another travels through some interface. The href field should be filled out with a URL such cade At this point, it is possible to look at how the example in the above example would be specified in xADL using pseudo-XML notation: A full treatment of XML is far out of scope for this guide.

In this way, architects would be able to apply their tools to architecture descriptions written in any language with an ACME translator. There are many different kinds of case studies.

In this model, components, connectors, and interfaces all have types called component typesconnector typesand interface typesrespectively.

xadl case study

Elements of text are marked up using casf, or special strings, that delimit a section of text. Each language focused on one or two particular features of architecture description and provided rich constructs dealing with that feature. They could, for example, describe things developed by the same author, or things that are running on the same machine in a distributed system, or things that are written in the same programming language.

So, two examples of valid href s might be: Xadk architecture of a software system is its high-level design; design at the level of components, connectors, and their configurations. This creates a “bridge” between the higher-level i.

case study on xadl

An obvious corrollary of this assumption is that hierarchically structured architectures really are not hierarchically structured—that the outer components merely provide a way of grouping similar internal architectures. Types are not composed of other types, nor is there to date a notion of subtyping or type inheritance in xADL.

In this diagram, we see a component with an internal architecture.

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xADL – Concepts and Info – Guide

It stands to reason that two components or connectors of the same type would have similar internal architectures. The rest of the semantics for modeling architectural structure are basically the same as those for modeling instances. First, it was constructed from the outset to be highly extensible. Also note that the types for these interfaces exist, but have been omitted as well: For the purposes of this discussion, we make a distinction between architecture instances, which exist at run-time, and structural elements, which exist at design-time.

Modeling Architectural Structure The instances schema gives xADL the ability to model running instances of architectural constructs like components, connectors, interfaces, and links. Because of this mapping, it is assumed that the mapped signature and interface have cas same interface type for reasons of consistency. Case Studies Power Point 1.

xadl case study

This is not inconsistent stury the object-oriented view of interfaces. Specializations of this general group construct can be specified in extensions to the construct. AWS provides cloud computing services to hundreds of thousands of companies.

The general groups are intended to serve as collections of xADL constructs, without any particular semantics at this stage.

case study on xadl

Learn how business are using Microsoft Azure to address opportunities in building scalable and reliable Big Data, Consumer, Enterprise, Due to the large semantic differences csae these architectures, this vision never became a reality.