OCEAN Demo

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OCEAN Demo

• Nachiket Acharya

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OCEAN Demo

• Demo Implementation of OCEAN
• Component Implementation
• Communication
• TSM
• Auction
• No Security, Negotiation and Accounting

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How to Start ?

• Java RunOCEAN
• It starts the application and listens for
  broadcasts and requests
• you can buy, sell and stopsell
• exit gracefully

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When it is Started
OCEANNode
Command Line Interpreter
Listen on Network for Communication From Other
nodes
Listen for Broadcasts
Port 21117
Threads
Multicast IP 228.5.6.7 Port 6789
Network
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sell

• Asks for Sell Rate per second and responds to
  broadcasts from buyers
• Multi-Threaded can accept multiple buyers
• If selled again, asks for new Sell Rate per
  second

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sell (continued)

• respond to broadcasts

OCEANNode set RATE_PER_SECOND
Network
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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

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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.

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buy (continued)
OCEANNode
3. Ask for seller IP
4. Migrate Job to selected seller
5. Intiate a thread to Wait for response
1. Send Broadcast
2. Initiate a thread to wait for responses From
other OCEANnodes
Network
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stopsell

• Zeros the Sell Rate per Second
• Stops responding to any more broadcasts from
  buyers
• Doesnt affect current tasks execution

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stopsell (continued)
OCEANNode set RATE_PER_SECOND to zero
Stop responding to broadcasts
Network
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exit

• On the seller side, checks if the seller is
  active in executing buyers task
• YES gives a message and doesnt exit
• NO Exits gracefully
• Exits on the buyer side.

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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

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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

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Architecture (continued)
OCEANObject int code float value OCEANJob job
OCEANJob Data members according to
need remote() local()
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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

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Architecture (continued)

• class CommandLineInterpreter interprets the
  command and initiates the appropriate execution
• Multithreaded architecture does not block
  waiting for something
• Broadcasting to the group for cheapest rates
  offered

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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

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• Thank you