RestMS a RESTful messaging protocol Pieter Hintjens Thilo Fromm FrOSCon 2009

What is messaging?

This is messaging.

Message routing Dynamic services Information mining

This is messaging. concretevs. loose staticvs. dynamic predefinedvs. interchangeable

This is messaging.

Web message protocols WebServices (WS Notifications, WS Eventing) XMPP, AtomPub ( Not in this talk: AMQP, [x]MQ ==> binary )

Simple Object Access Protocol It's not simple

WebServices Eventing Very complex A draft, not yet ready WebServices Notifications Has no transport Very complex Needs WSA, XSD (types, marshalling), … Message brokerage needs WSN-b Simple Object Access Protocol

WS-N: Announce a service 2/RegisterPublisher/RegisterPublisherRequest... uuid:84decd55-7d3f-65ad-ac44-675d9fce5d22 npex:SomeTopic true T00:00: Z 2/RegisterPublisher/RegisterPublisherResponse... uuid:95fefeb3-f37d-5dfe-44fe-221d9fceec99 … Request Response

Use case driven standards Transport and Environment well- defined No server based filtering or routing of messages Not intended for application message brokerage XMPP and AtomPub

XMPP – announcing a service <iq type='set' from= to='pubsub.shakespeare.lit' id='sub1'> <pubsub xmlns= ' <subscribe node='princely_musings' <iq type='result' from='pubsub.shakespeare.lit' id='sub1'> <subscription node='princely_musings' subid='ba49252aaa4f5d320c24d3766f0bdca de78c78d3' subscription='subscribed'/> Request Response

Meet RestMS. PubSub / Request+Response Distribution, Routing, Filtering Service Discovery Dynamic services and subscriptions

Meet RestMS. open lightweight scalable RESTful

RestMS – Announcing a service. POST /restms/domain/default Content-Type: application/restms+xml Slug: 123 <restms xmlns= " /restms"> HTTP/ Created Content-Type: application/restms+xml Location: <feed type="service" name="123" /> Request Response

RestMS - A message's way

Message

RestMS - A message's way Message Feed

RestMS - A message's way Message Feed Joins

RestMS - A message's way Message Feed Joins Pipes

RestMS – Dynamic resources Message Feed Joins Pipes

RestMS – Dynamic resources Message Feed Joins Pipes

RestMS – Dynamic resources Message Feed Joins Pipes

RestMS – Dynamic resources Message Feed Joins Pipes

RestMS – Dynamic resources Message Feed Joins Pipes

RestMS PubSub The“Parrot” pattern Subscriber s Publisher

Subscriber s Publisher s RestMS PubSub The“Parrot” pattern

RestMS Req/Resp The “Wolfpack / Housecat” pattern Service provider Service client

Service provider Service client RestMS Req/Resp The “Wolfpack / Housecat” pattern

Service provider Service clients RestMS Req/Resp The “Wolfpack / Housecat” pattern

Service provider Service clients RestMS Req/Resp The “Wolfpack / Housecat” pattern

Come in, we're open! Specifications More message patterns General messaging information Discussion + Coordination

The RestMS standardization process

Questions?

Thanks!