Introduction%20to%20MINA

1
Introduction to MINA

• Trustin Lee
• trustin_at_apache.org
• http//people.apache.org/trustin/

2
Agenda

• Overview
• In-depth View
• Implementation Demo
• Future
• Conclusion

3
Overview

• A Multipurpose Infrastructure for Network
  Applications

4
What is MINA?
Overview

• An acronym for
• A Multipurpose
• Infrastructure
• For Network
• Applications
• A network application framework
• A subproject of
• the Apache Directory Project

5
Features
Overview

• Unified API
• Easy
• Event-driven
• Abstracted from existing I/O APIs
• Elegant application design

6
Supported Transport Layers
Overview

• Out-of-the-box
• Based on Java NIO (New I/O)
• Socket (TCP/IP)
• Datagram (UDP/IP)
• In-VM pipe
• Pending
• Multicast
• Serial and parallel port
• ltyour favorite onegt

7
Elegant Application Design
Overview

• Unit test friendly
• The Abstract API lets you test your application
  without a real client or server via mock objects.
• Extensible
• Runtime modification of application behavior
  using filters
• Maintainable and Reusable
• Separation of networking code (MINA), protocol
  codec, and business logic

With High Productivity
8
Who Uses MINA?
Overview

• The Apache Directory Project
• QuickFIX QuickFIXEngine.org
• Financial Information eXchange Protocol
• RED5 Server OSFlash.org
• Macromedia Flash Media RTMP
• JStyx JStyx.sf.net
• Styx, a file sharing NFS-like protocol
• Proprietary SMPP / SMS servers

LDAP Kerberos DNS NTP
9
In-depth View

• A Multipurpose Infrastructure for Network
  Applications

10
At the First Glance
In-depth

• IoSessionManager
• Where real I/O occurs
• Generates I/O events
• Processes I/O requests
• IoFilters
• Filters I/O events and requests
• IoHandler
• ltYour protocol logicgt
• IoSession
• Represents a connection

11
IoSessionManagers
In-depth
Server-sideAccepts clients
Client-sideConnects to a server
And their implementations
12
IoSession
In-depth

• A connection between an IoHandler and a remote
  peer
• Provides ways to send an I/O request
• Write a message
• Close the current connection
• State information
• Idleness
• Last I/O time
• Transport layer parameters
• Attributes Protocol-specific data storage

13
IoHandler
In-depth

• Where you implement your network application

14
IoFilter
In-depth

• A reusable event request interceptor
• Hot-deployable
• Scope
• An IoSession or an IoSessionManager

15
IoFilter (Contd)
In-depth

• Out-of-the box filters
• SSL / TLS
• Remote peer blacklisting
• Thread pool
• Logger
• Pending filters
• Profiler
• Traffic throttle
• Lightweight firewall
• Overload prevention

16
Thread Pooling with IoFilter
In-depth
17
Protocol Codec
In-depth

• By default,
• IoHandler uses a ByteBuffer to do I/O
• Tight coupling of protocol codec and business
  logic (
• ProtocolCodecFilter is an IoFilter
• Performs transformation betweena ByteBuffer and
  a POJO (Plain Old Java Object)
• Clear separation

18
Protocol Codec (Contd)
In-depth
19
In-VM Pipe Transport Type
In-depth

• A virtual pipe
• Requires no protocol codec
• I/O events and requests are converted into direct
  method invocations.
• Two MINA servers in the same VM
• Can bypass
• Protocol codec
• Network latency

20
Implementation Demo

• A Multipurpose Infrastructure for Network
  Applications

21
More Complex Examples
Demo

• Realistic examples
• Visit Herehttp//directory.apache.org
  /subprojects/network/getting_started.html

22
Future

• A Multipurpose Infrastructure for Network
  Applications

23
MINA as a Platform
Future
Integration with Apache ASN.1 for complex
protocols
Users can build customized servers with
ready-made protocol codecs.
Just like drawing an ER Diagrams!
24
Real-Time Management System
Future

• A universal management view
• JMX console and Web browser
• Real time access
• Server traffic
• IoFilter Hot-deploy
• Which client is sending what message now?
• Which message takes toolong to process?
• And ltwhat you want to monitorgt

25
We Need Your Participation!
Future

• Sounds exciting?
• Please help MINA team!
• Try MINA
• Ask questions
• Criticize
• Report bugs
• Benchmark
• Contribute code
• Contribute a tutorial

26
Conclusion

• A Multipurpose Infrastructure for Network
  Applications

27
Conclusion
Conclusion

• MINA is an extensible network application
  framework that helps you implement your network
  application elegantly without compromising
  productivity.
• MINA can be a complete network application
  development management platform if we get our
  effort together.

28
Resources

• Homepage
• http//directory.apache.org/subprojects/network/
• Mailing List
• dev_at_directory.apache.org(Please use mina
  prefix)

29
Thank You!

• Q A