Dot net coursework

2016

Dot Net Coursework

COMPUTER PROGRAMMING ASSIGNMENT HELP

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Introduction The application “POSTA Web Service API” is developed to fulfill the requirements of Advanced Applications Programming: Coursework 2. This Web Service API is developed to work with “Parts of Speech Tagging Applications”.

The process of marking up noun, verb, adjective, adverb etc. in a text is called “Part of Speech Tagging”. Generally it is also known as “Grammatical Tagging” or simply “POST”. Many English puzzle games asks us to identify noun, verb and adjectives use part of speech tagging to determine solution.

Since a single word can represent more than one thing at different locations, it makes part of speech tagging very complex. So just having a list of words is not sufficient for a POST application.

To work with Parts of Speech Tagging Applications (POSTA), several features have been developed in the application “POSTA Web Service API”. The benefit of developing the application as a web service is all client applications (Console application, Desktop application and Web application) can access it.

Overall System Design 1. Implementation of WEB Service: Our main objective is to develop a system for all kind of user applications (Console, Desktop and Web), which provides POSTA implementation for applications. The best suitable solution for this is to develop a web service. Web services are background components which run in the background silently and perform their work.

To keep our business logic separate from the actual web service we decide to develop this web service as “Wrapper Class Library”. We decide to implement this wrapper class library in a way that it can be accessed with any configuration settings and all of its functions can be accessed easily using simple object oriented programming (Miguel, 2014). Read more about ASP Dot Net Programming Assignment In our web service the whole POSTA functionality is provided by three functions: 1. String SentenceSplit(String input, String flag):It is used to break input string into sentences. It return a String containing all sentences with one sentence per line. Here second argument flagwill be used in future versions of this web service.

2. String Tokenise(String input, String flag):It is used to break input string into tokens. It returns a String containing tokens with one token per line. Here input string is the output from SentenceSplit() and second argument flag will be used in future versions of this web service.

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3. String Tag(String input, char delimiter, String flag):It is used to break input string into tags. It returns a String containing tags with one tag per line. Here input string is the output from Tokenise(), second argument delimiter is used to determine tag inside input string and third argument flag will be used in future versions of this web service.

Note:UTF-8 format is used in all of above methods. These functions accept UTF-8 based strings and return results as UTF-8 strings.

(Figure: Method Calling Sequence)

2. Additional Functionality to the Web Service Our web service define following additional functionality: 1. Client Access Statistics: This web service will store all client usages information including IP address of client, date and time of use etc.

2. Service Processing Statistics: Service will store statistics about how many times each particular method is usedand it will also store average time taken to generate the result. www.programmingassignmentshelp.net

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3. Data Security: Service is using binary files to store data, so data is secured by any outside access (Foley, 2012).

4. Secured Data Exchange: All data exchange between the client and server is supported by https protocol. Which manages security via secure socket layers Read more about Dot Net Programming Assignment

3. Client Application We have already developed a SOAP based web service. After it we have developed a WEB-Based Client application to use our web service. This web based client application display the web form to user to access the web service. Here user can enter his/her text in the provided text box and then click on any of available process buttons (Sentence Split, Tokenise and Tag) to view all processed results from the web service. This application also provides otherbuttons to view server statistics like number of requests for a method and average processing time.

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Unit Testing Unit tests for wrapper class library: Test Scenario

Expected outcome

Testing of SentenceSplit()

The function must return a string containing each sentence per line from Splitting Started. the given text.

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Actual Outcome Function is retuning all sentences with one sentence per line. Log Output from sentence split is :

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SentenceSplit count increased.

Starting Search for Sentences.

Sentence Found.

Sentence Found.

Sentence Found.

Process Time : 122 All Statistics Saved.

Function is returning all tokes from a string with each token per line. Log output from Tokenise() is: Tokenise Started Tokenise count increased The function must return a string Token Found Testing of Tokenise() containing each token per line split each token Token Found from given text.

Token Found Token Found Process Time : 140 All Statistics Saved Function is returning all tokens with tags with each token per line. Log output from Tag() is:

Testing of Tag()

Tagging Started The function must return a string Tag count increased containing each tag and token with specified Tag Found delimiter.

Tag Found Tag Found

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Tag Found Process Time : 154 All Statics Saved

System Testing Test Scenario

Testing of wrapper class library

Testing of Additional Functionality

Testing of Client Application

Expected Result

Actual Outcome After passing sample data to All implemented functions the wrapper class library we SentenceSplit(), Tonkenise(), found that results of all three and Tag() must work perfectly functions are perfect and and return values as described returning results as stated in in the assignment. the assignment.

Functions for additional functionality are returning Functions to retrieve client’s correct results.

IP address, average processing time and server statistics must These functions are storing save data on server and return data in binary files. These results whenever requested. binary files can not be read by All stored data must be any other program. In this way secured. additional functionality guarantees the data security.

User interface of the client User interface of client application must be simple application is easy to use and and easy to use. It must handle simple. It is handling all input all input errors and produce errors and giving significant meaningful messages. messages.

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Evolution of the application A. How it is Scalabe?

Scalability means application is designed in such a way that it can easily be extended in functionality in future. All functions of this application are independent of each other and contain argument for future expansion (Chen, 2011).

B. How it is Robust?

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Robustness is the ability of the system to handle errors occurred during execution. This application is handling all errors on its own and display meaningful messages to its users when an error has occurred. It can be accessed from any type of client application be it a console application, desktop application or web application.

C. Why we use SOAP over REST? We have decided to use SOAP based web service over REST web service because SOAP is language independent, platform independent and protocol independent (REST requires HTTP).

Soap has built in error handling and works well in distributed enterprise environments. Read more about Web Application Testing Assignment

Future Work A. Implementation in Python: Python is a pure object oriented scripting language. We are planning to use this web service with python. WSDL class from python library provides functionality to call web services whether they use SOAP or REST. Here is the syntax of accessing a web service.

Eg: WSDL.proxy(“WSDL Url of web service”);

B. Application as fully functional Web Service: When this application is developed as a fully functional web service multiple users can access it at a particular time. To optimize resources on the server we can use connection pooling and to remove concurrent requests for same resource we can use synchronization. Using connection pooling and synchronization our application will generate accurate results regardless of number of requests. Read more about Ecommerce Website Designing Assignment

C. Requirements For Web hosting: 1. Apache based hosting:   

Platform : Linux/Windows Ram : 256 MB Hard disk space : 400MB

2. .Net based hosting (IIS Server):   

Platform : Microsoft Windows Ram : 512 MB Hard disk space : 400 MB

Conclusion

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This application “POSTA Web Service API� is designed as a web service, so it can be accessed by any kind of client application and from anywhere. This application provides strongimplementation to work with parts of speech tagging. It also providessome features (Arguments for future use) so that it can easily be expended in future without changing the client code.

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