RESEARCH OF THE WEB SERVICE MODEL FOR CAR RENTAL

The study examines the analogues of the developed web service — highlights their advantages and disadvantages and concludes which functions should be added to the web service: UML diagrams of precedents, components and sequences, which show the main requests and responses between client, server and database analysis of these diagrams and the calculation of the upper estimate of the computational complexity of their implementation. The construction of a Petri net with a graph of achievable markings was performed, the analysis and modeling of the network was performed, based on the results of which a conclusion was made about the correctness of the structure constructed at the previous design stage. The feature of the model is the introduction of positions, conversions and connections that allow users to pay rent online and use the map to view the location of the car — this distinguishes the web service among analogues. Positions, transitions, and links have also been introduced to validate forms on the client side of the web service, which increases efficiency. A general block diagram is constructed, which demonstrates the main data flows on the server and the client, as well as between the server and the client. The construction of the basic graph-schemes of algorithms which show novelty of the developed web service is executed.