Lewis University Subject Software Architecture and Design Paper

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Architecture Alternative Evaluation

Your organization (XYZ Industries) took on a new initiative, which involves the exposure of XYZ systems’ functionality via Application Programming Interface (API) for business partners, who wish to integrate their systems with XYZ’s. API is estimated to consist of more than 25 different functions that business partners can utilize. Such initiative is believed to eliminate much of the manual work (via emails and phone calls) performed by XYZ and its many business partners and promote a more automated, efficient and well-integrated inter-organizational business processes.

As a member of the architecture team, you have been tasked with analyzing and evaluating three architectural alternatives for realization of the API:

ALT-1 TCP server/multiple TCP clients – develop a TCP server along with multiple TCP clients. The TCP clients will be written in different programming languages to accommodate the needs of various business partners, this is essential to avoid confining partners to a particular programming language. This option involves the design of a proprietary wire protocol. APIs can be invoked by calling the appropriate member functions of the TCP client objects/classes.

ALT-2 SOAP/XML webservice – develop a SOAP service with XML for message and data exchange. SOAP service by definition is language-neutral, business partners can develop their systems to access the SOAP service using a SOAP client library of their choice.

ALT-3 REST/JSON service – a RESTful service with JSON for data exchange. Similar to a SOAP service (ALT-2), a RESTful service is language-neutral, however, it is more light weight than SOAP.

The new API must –

Allow a business partner the choice to pick up client-side technology stack of his choice, with no limitation on programming language.
Make it easy for a business partner to experiment with API without having to write code. In other words, a business partner should be able to invoke various APIs, experiment with functionality and get results in less than one day.
Keep XYZ and the partner systems independent and secure from each other. In other words, XYZ cannot ask the business partners to run any software agent on partner’s private network, and vice versa.
API must be accessible from the public Internet.

Perform an architectural evaluation and prepare a presentation for the rest of the team of your findings (The rest of the team is me in this case!). The presentation can be a word document or a ppt that shows your evaluation.

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