ApacheCon EU 2008

Niklas Gustavsson [email_address] http://protocol7.com

MINA commiter since 2007 On FtpServer since 2005

MINA commiter since 2007

On FtpServer since 2005

So, what's MINA ?

So, what's MINA ?

Java API for network applications

Java API for network applications

Event driven Asynchronous

Event driven

Asynchronous

Server side Client side

Server side

Client side

Pluggable implementations

Pluggable implementations

You will probably use the NIO implementation

You will probably use

the NIO implementation

...and the VmPipe

...and the VmPipe

Separation of concerns Wire ↔ Business logic

Separation of concerns

Wire ↔ Business logic

MINA architecture

MINA architecture

IoService IoConnector IoAcceptor

IoFilter

IoFilter

Protocol codec

Protocol codec

Lots of free stuff!

Lots of free stuff!

Traffic shapers SSL Compression Session based logging Firewall

Traffic shapers

SSL

Compression

Session based logging

Firewall

IoHandler

IoHandler

Concurrency... yeay!

Concurrency... yeay!

Acceptor thread Connector thread

Acceptor thread

Connector thread

I/O processor thread Cores + 1

I/O processor thread

Cores + 1

ExecutorFilter

ExecutorFilter

Fine, so what's best for me?

Fine, so what's best for me?

What's new in MINA 2.0

What's new in MINA 2.0

Thread model redesigned

Thread model redesigned

Simplified configuration

Simplified configuration

ByteBuffer now IoBuffer and default to heap allocation

ByteBuffer now IoBuffer

and default to heap allocation

IoSessionLogger removed

IoSessionLogger removed

And lots and lots of Cleanup and improvements

And lots and lots of

Cleanup and improvements

So, which version should I use?

So, which version should I use?

MINA 1.0 MINA 1.1 MINA 2.0

MINA 1.0

MINA 1.1

MINA 2.0

Migrating from 1.x

Migrating from 1.x

Review thread model

Review thread model

Update configuration

Update configuration

Remove IoSessionLogger

Remove IoSessionLogger

Update class and package names

Update class and package names

DEMO!

DEMO!

Simple chat server in MINA

Simple chat server in MINA

public final static Chat INSTANCE = new Chat(); private List<User> users = new ArrayList<User>(); public void addUser(User user) { users.add(user); } public void removeUser(User user) { users.remove(user); } public void talkToAll(Message msg) { for(User user : users) { user.talkTo(msg); } }

public final static Chat INSTANCE = new Chat();

private List<User> users = new ArrayList<User>();

public void addUser(User user) {

users.add(user);

}

public void removeUser(User user) {

users.remove(user);

}

public void talkToAll(Message msg) {

for(User user : users) {

user.talkTo(msg);

}

}

public class ChatDecoder extends CumulativeProtocolDecoder { protected boolean doDecode(IoSession session, IoBuffer buffer, ProtocolDecoderOutput out) throws Exception { if(do we have all the data we need?) { Message msg = new Message(user, text); out.write(msg); return true; } else { return false; } } }

public class ChatDecoder extends CumulativeProtocolDecoder {

protected boolean doDecode(IoSession session, IoBuffer buffer, ProtocolDecoderOutput out) throws Exception {

if(do we have all the data we need?) {

Message msg = new Message(user, text);

out.write(msg);

return true;

} else {

return false;

}

}

}

public class ChatHandler extends IoHandlerAdapter { public void sessionCreated(IoSession session) throws Exception { User user = new MinaUser(session); session.setAttribute(USER_ATTRIBUTE, user); Chat.INSTANCE.addUser(user); }

public class ChatHandler extends IoHandlerAdapter {

public void sessionCreated(IoSession session) throws Exception {

User user = new MinaUser(session);

session.setAttribute(USER_ATTRIBUTE, user);

Chat.INSTANCE.addUser(user);

}

ChatHandler continued... public void messageReceived(IoSession session, Object o) throws Exception { Message msg = (Message) o; if(msg.getText().equalsIgnoreCase(&quot;QUIT&quot;)) { session.closeOnFlush(); } else { Chat.INSTANCE.talkToAll(msg); } } ... }

ChatHandler continued...

public void messageReceived(IoSession session, Object o) throws Exception {

Message msg = (Message) o;

if(msg.getText().equalsIgnoreCase(&quot;QUIT&quot;)) {

session.closeOnFlush();

} else {

Chat.INSTANCE.talkToAll(msg);

}

}

...

}

SocketAcceptor acceptor = new NioSocketAcceptor(); acceptor.getFilterChain().addLast(&quot;codec&quot;, new ProtocolCodecFilter(new ChatCodecFactory()) ); acceptor.setIdleTime(IdleStatus.BOTH_IDLE, 60); acceptor.setHandler(new ChatHandler()); acceptor .bind(new InetSocketAddress(6789));

SocketAcceptor acceptor = new NioSocketAcceptor();

acceptor.getFilterChain().addLast(&quot;codec&quot;, new ProtocolCodecFilter(new ChatCodecFactory()) );

acceptor.setIdleTime(IdleStatus.BOTH_IDLE, 60);

acceptor.setHandler(new ChatHandler());

acceptor .bind(new InetSocketAddress(6789));

Fire up your terminals telnet 62.12.11.90 6789

http://mina.apache.org

[email_address]

Questions ?

http://flickr.com/photos/samiksha/408007916/ http://flickr.com/photos/henrikmoltke/142750871/