Urgent Java Task in Eclipse oxygen Release (4.7.0)

Hi, We need to use oxygen Release (4.7.0) eclipse version. You are required to design and develop a Java application based on the Apache River (JavaSpaces) technology to provide a “small ads” system for use in an office environment. Note that this specification is deliberately vague to allow you scope to develop the software in different ways. However, the core functionality must include the following requirements: 1. The system must allow users to post small ads (advertisements for items for sale, typically small, second hand items at low prices). The advertisements will be stored in a JavaSpace for as long as required. 2. Two types of advertisement will be allowed: items offered at a fixed price and items offered for other users to place bids upon. 3. Users should be able to browse all items currently offered for sale. 4. The system should allow a user to append a message or question to an item, and allow the seller to append a response to that message. 5. Items offered at a fixed price should be removed from the system once a user confirms their intention to purchase. Both the buyer and seller should then be notified of the sale using the JavaSpace notify() functionality (or the registerForAvailability() functionality). Items offered for bids should be given a closing date and time, and once the sale has closed then both the highest bidder and the seller should be notified of the sale. Submission: 3 days after confirmation. We would make long-term relationship with the best guy who would take this project. Thanks.