OCEAN Demo Nachiket Acharya OCEAN Demo Demo Implementation
- Slides: 19
OCEAN Demo Nachiket Acharya
OCEAN Demo • Demo Implementation of OCEAN • Component Implementation – Communication – TSM – Auction – No Security, Negotiation and Accounting
How to Start ? • ‘Java Run. OCEAN’ • It starts the application and listens for broadcasts and requests • you can buy, buy sell and stopsell • exit gracefully
When it is Started OCEANNode Command Line Interpreter Listen for Broadcasts Listen on Network for Communication From Other nodes Port: 21117 Threads Network Multicast IP: 228. 5. 6. 7 Port: 6789
sell • Asks for Sell Rate per second and responds to broadcasts from buyers • Multi-Threaded – can accept multiple buyers • If sell’ed sell again, asks for new Sell Rate per second
sell (continued…) OCEANNode set RATE_PER_SECOND respond to broadcasts Network
buy • Sends out a broadcast for the advertisement of requirement of resources • Waits for 5 seconds for all the sellers to respond • Displays a list of sellers responded along with their IP addresses and Rate Information • Prompts for seller IP address
buy (continued) • Transfers ‘OCEANJob’ object to selected buyer • Waits for the response from the buyer in a thread – non-blocking remote execution • Displays the Output to the user.
buy (continued) OCEANNode 3. Ask for seller IP 4. Migrate Job to selected seller 5. Intiate a thread to Wait for response 2. Initiate a thread to wait for responses From other OCEANnodes 1. Send Broadcast Network
stopsell • Zeros the Sell Rate per Second • Stops responding to any more broadcasts from buyers • Doesn’t affect current tasks execution
stopsell (continued) OCEANNode set RATE_PER_SECOND to zero Stop responding to broadcasts Network
exit • On the seller side, checks if the seller is active in executing buyers task – YES – gives a message and doesn’t exit – NO – Exits gracefully • Exits on the buyer side.
Architecture of the System • class OCEANObject to communicate between any two OCEAN Nodes – Encapsulates • • code (integer) – to distinguish at the receiver side value (float) – to respond float values job (OCEANJob) – to migrate tasks Methods to operate on these data objects
Architecture (continued) • class OCEANJob to migrate taks – Implements interface Xinterface • public void remote() • public void local(OCEANObject) – Encapsulates • Two methods – remote() – executes at the seller side – local() – utilize the results set by the execution of remote() » Executes at the buyer side – Implementation forced by ‘Implementation of Xinterface’ • Data members on demand
Architecture (continued) OCEANObject int code float value OCEANJob job OCEANJob Data members – according to need remote() local()
Architecture (continued) • class Sender and Receiver to encapsulate the function of sending and receiving – Threaded classes • class OCEANAuction to contain static value of RATE_PER_SECOND • class OCEANSeller to represent various instance of Seller – Executes the remote method of OCEANJob object
Architecture (continued) • class Command. Line. Interpreter interprets the command initiates the appropriate execution • Multithreaded architecture – does not block waiting for something • Broadcasting to the group for cheapest rates offered
Programming Effort • Atleast three threads running in the system at any time • A separate thread for each execution of a remote task • 1100 lines of Java Code distributed over 8 classes and 1 Interface • 2 Weeks part-time effort
Thank you
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