1.
RabbitMQ
for perl mongers

2.
__
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_/` -"-/` /
| | |
(d b) _/
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,".|.'._/.'.|.",
/ /' _|_ '/
| / '-`"`-' |
| | | |
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jgs / / /
`"` : /'"`
`""`""`

3.
AMQP
Advanced Message Queuing Protocol

4.
message flow in
RabbitMQ

5.
RabbitMQ
Exchange
Queue Queue

6.
RabbitMQ RabbitMQ
Queue

7.
RabbitMQ
Queue

8.
AMQP XMPP STOMP HTTP
RabbitMQ
AMQP XMPP STOMP HTTP

9.
AMQP XMPP STOMP HTTP
RabbitMQ AMQP XMPP STOMP HTTP
AMQP XMPP STOMP HTTP RabbitMQ
AMQP XMPP STOMP HTTP

10.
nice pictures but how
does it look like?

11.
Net::AMQP(::Simple)

12.
boilerplate

13.
my $spec = {
RemoteAddress => '127.0.0.1',
RemotePort => { default => 5672 },
Username => { default => 'guest' },
Password => { default => 'guest' },
VirtualHost => { default => '/' },
Logger => 0,
Debug => { default => {} },
Alias => { default => 'amqp_client' },
AliasTCP => { default => 'tcp_client' },
Callbacks => { default => {} },
channels => { default => {} },
is_started => { default => 0 },
};

14.
send a hash

15.
# conect to the server
Net::AMQP::Simple::connect($spec);
# push the message
Net::AMQP::Simple::pub( $queue, to_json($hash) );

16.
receive a message

17.
while ( !$done ) {
check( Net::AMQP::Simple::poll() );
}
sub check {
foreach my $_req (@_) {
my $req = from_json($_req);
print Dumper($req);
$done = 1;
}
}

18.
typical messaging flow

19.
the “server”

20.
Net::AMQP::Simple::connect($spec);
Net::AMQP::Simple::queue("web.domaindb.up");
while (1) {
process( Net::AMQP::Simple::poll() );
}
sub process {
foreach my $_req (@_) {
my $req = from_json( $_req,
{ allow_nonref => 1 } );
...
}

21.
the “client”

22.
Net::AMQP::Simple::connect($spec);
Net::AMQP::Simple::pub( $queue, to_json($hash) );
Net::AMQP::Simple::queue( $uuid, 'autodelete' );
while ( !$done ) {
check( Net::AMQP::Simple::poll() );
}
sub check {
foreach my $_req (@_) {
my $req = from_json($_req);
print Dumper($req);
$done = 1;
}
}

23.
in plain english
• start a service that listens on a queue
• push a message to the service and tell the
service how to reply (if needed)
• listen on a temp queue for the response (if
needed)

24.
how to reply?
• use AMQP header fields
• roll your own protocol (JSON, XML, ...)

25.
... roll your own
if you want to use the full power of RabbitMQ

26.
AMQP XMPP STOMP HTTP
RabbitMQ
AMQP XMPP STOMP HTTP

27.
how to get started?

28.
• http://rabbitmq.com (get rabbit here)
• http://github.com/norbu09/
• net_amqp (has the Simple.pm)
• RabbitIntro (some samples)
• Net_RabbitMQ_HTTP

29.
or ask me
lenz@ideegeo.com
@norbu09

30.
thanks

31.
credits
• the RabbitMQ guys for an awesome
product
• iWantMyName for letting me play with all
that stuff
• many guys on the mailing list for helping me
out when i got stuck
• Catalyst IT for the beers

32.
more credits
• http://www.ascii-art.com
• http://www.flickr.com/photos/revengingangel/
• http://www.flickr.com/photos/jeff62138/