Free Essay

Design Patterns

In: Business and Management

Submitted By jesmi
Words 750
Pages 3
Abstract:
This report gives the idea of how the generic system is designed and implemented for any of the administration system. A generic system represents all the systems whether they are physical, sentient or more abstract. All the system follows the rules of the generic system. This system can be implemented during software development processes which helps all the processes to adapt to every software environment easily.
Introduction:
In software development , design phase is one of the important phase which takes lots of time and it is very hard to satisfy the end user regarding designing. Therefore this designing phase starts from beginning the of software development process till the end of the project. Therefore keeping in mind regarding the user needs and evolvement of new techniques each day, the generic system of design and development is introduced. By making the system generic, it becomes very easy for any of the software development company to adapt with the new working environment.
Problem description:
To develop a generic system design that helps to monitor the entity life history of any particular enitity and to show how this design is used in the administration system of academic conference.
Objective:
The main objective is to make a generic system design that can be implemented in the administration of any of the organization with few customization.
=> The generic system will be used to monitor the administration system and to keep track of the progress of any event in the administration system.
=>To make the progress chart that helps to give clear idea about progress in the event.
=> The generic system provides the function that adapts in any administrative environment.
What is ELH (Entity Life History)? :
Entity life history is the sequence of event that takes place on the entity from its creation till its death.('Entity Life history', 2012). This helps to model the changes in the value of the attributes of entity throughout its life and determines the sequences of the update. It helps to improve understanding the required process which can be used to support the transaction design.('Entity Life history (ELH)').
Generic Administrative System:

Figure 1: Class diagram for the generic administrative system
Above class diagram shows the necessary entity that plays a vital role in the Generic Administrative System.
The figure displays that the graph has the collection of events and states. By looking at the graph, it can be seen that how the events and states of the object are changed. Graph also keeps track of event and progress and after finishing one state, it determines what the next state is as it can be seen in the picture that graph consists of operation getNextState(). Hence it can be said that graph is the collection of relation between state and events as it links events to state.

An event is the sudden or extraordinary occurence that changes the state variables, some output or occurence of other events.('What Is an Event?', 2012). In the figure event uses invoker class to execute the command which is based on the command design pattern. In this design pattern, invoker asks the command to carry out some request same as here in this case invoker asks event to execute some request.('Command Pattern'). When event occurs that will change the state of progressible objects. There will be deadline in the event as its attributes because for each event there will be specific deadline.
Similarly, progress is the collection of graph which consist of list of abstract event to be executed. Actually progress is the entry point from which every task are done like changing state, execution etc. Progress has its starting point and end point and it has its own name.
Progressible is any object which has some form of progress or which is able to progress. The progress is carried out into progressible due to some execution of events. Therefore progressible object is related with the event. Progressible object has its own attributes like name.
Use case diagram for Generic administration system:

Figure: Use case diagram for generic administrative system

References:
1. Database service, inc.(2012),'Entity Life History', Available at: http://www.databaseservice.co.uk/elh.php
2. Manchester metropolitan University,'Entity Life History(ELH)', Available at: http://www.jacksonworkbench.co.uk/stevefergspages/papers/entity_event_modelling/index.html
3. MathWorks, inc.(2012),'What Is an Event?', Available at: http://www.mathworks.co.uk/help/toolbox/simevents/gs/bqew4dh-1.html 4. Anonymous,'Command Pattern', Available at:
http://www.oodesign.com/command-pattern.html

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