Reflecting Proxies Mini != Small

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Reflecting ProxiesMini ! Small

• Jon Babbage
• Tony Lambert
• Michael Malinak
• Paul Middlin
• CSE870 Advanced Software Engineering,
• Spring 2001
• Instructor Dr. B. Cheng

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Overview

• Reflecting Proxies Description
• Framework Overview
• Sample Application Highlights
• Demo
• QA

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Reflecting Proxies

• Intermediate in network connection
• Client connects to proxy on given port
• Proxy connects to specified server
• Proxy may log, echo, or modify data as needed
• Proxy may implement other functions
• Load Balancing
• Connection Limiting

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Multi gt Single
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Multi gt Multi
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Load Balancing
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Framework Overview
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Framework Five

• Statistics
• 4925 Lines of Code
• 13 Classes
• 9 Interfaces

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Framework Five (cont)

• Features
• Parsing Configuration File
• Standard Forwarding
• Logging
• Echoing
• Load Balancing
• Connection Limiting

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Example Configuration File

• Conn0 1000 b 1 2 2 mulder 23 scully 23
• Conn1 1200 cesoid.com 23 2 2
• Conn2 1100 L 2 cesoid.com 23 0 0

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Logging/Echoing

• Logging/Echoing to files and/or screen
• Created formatting structure to allow for
  customized output
• LI Local IP
• RM Remote Machine Name
• DltStringgt Date Formatting Conforms to Java
  SimpleDateFormat

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Load Balancing

• Forward connection to one of many possible hosts
• Use of Strategy Pattern
• Random Balance Strategy
• Round Robin Balance Strategy
• User can define additional using BalanceStrategy
  Interface

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Connection Limiting

• Limit connections to a given host
• Specify on a per port basis

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Framework Presentation

• Time to see it in action

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QA

• Feel free to ask questions.