Post on 10-May-2015
description
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RabbitMQfor perl mongers
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AMQPAdvanced Message Queuing Protocol
message flow in RabbitMQ
RabbitMQ
Exchange
QueueQueue
RabbitMQ
Queue
RabbitMQ
RabbitMQ
Queue
AMQP
RabbitMQ
XMPP STOMP HTTP
XMPP STOMP HTTPAMQP
AMQP
RabbitMQ
XMPP STOMP HTTP
XMPP STOMP HTTPAMQP
AMQP
RabbitMQ
XMPP STOMP HTTP
XMPP STOMP HTTPAMQP
nice pictures but how does it look like?
Net::AMQP(::Simple)
boilerplate
my $spec = { RemoteAddress => '127.0.0.1', RemotePort => { default => 5672 }, Username => { default => 'guest' }, Password => { default => 'guest' }, VirtualHost => { default => '/' },
Logger => 0, Debug => { default => {} },
Alias => { default => 'amqp_client' }, AliasTCP => { default => 'tcp_client' }, Callbacks => { default => {} }, channels => { default => {} }, is_started => { default => 0 },};
send a hash
# conect to the serverNet::AMQP::Simple::connect($spec);
# push the messageNet::AMQP::Simple::pub( $queue, to_json($hash) );
receive a message
while ( !$done ) { check( Net::AMQP::Simple::poll() );}
sub check { foreach my $_req (@_) { my $req = from_json($_req); print Dumper($req); $done = 1; }}
typical messaging flow
the “server”
Net::AMQP::Simple::connect($spec);Net::AMQP::Simple::queue("web.domaindb.up");
while (1) { process( Net::AMQP::Simple::poll() );}
sub process { foreach my $_req (@_) { my $req = from_json( $_req, { allow_nonref => 1 } ); ...}
the “client”
Net::AMQP::Simple::connect($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; }}
• 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)
in plain english
how to reply?
• use AMQP header fields
• roll your own protocol (JSON, XML, ...)
... roll your ownif you want to use the full power of RabbitMQ
AMQP
RabbitMQ
XMPP STOMP HTTP
XMPP STOMP HTTPAMQP
how to get started?
• http://rabbitmq.com (get rabbit here)
• http://github.com/norbu09/
• net_amqp (has the Simple.pm)
• RabbitIntro (some samples)
• Net_RabbitMQ_HTTP
or ask me
lenz@ideegeo.com
@norbu09
thanks
• 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
credits
• http://www.ascii-art.com
• http://www.flickr.com/photos/revengingangel/
• http://www.flickr.com/photos/jeff62138/
more credits