A few words about

Konstantin Burkalev, @KSDaemonMoscowJS, july 2014

≠WAMP

Windows, Apache, MySQL, PHP

Application level protocol, "implementing 2 patterns:

• Publish/Subscribe (PubSub)"• Remote Procedure Calls (RPC)

=WAMP

Basic components and definitions

• Resource identifier • Transport • Serializer • Session • Realm - domain, namespace • Peer • Client • Router • Role

Architecture

Resource identifiers

• Subscriptions • Procedures • Errors

Required for:

are URI-based• system.send.file • chat.message • users.admins.message • user.profile.updated

Serialization and data types

• integer • string • bool • list (array) • dict

Supported serializers:• JSON • MsgPack

Supported data types:Required: Additional:

any, depends on serializer

Messages and payload• [HELLO,  Realm|uri,  Details|dict]  "

• [PUBLISH,  Request|id,  Options|dict,  Topic|uri]  • [PUBLISH,  Request|id,  Options|dict,  Topic|uri,  Arguments|list]  • [PUBLISH,  Request|id,  Options|dict,  Topic|uri,  Arguments|list,  ArgumentsKw|dict]  "

• [CALL,  Request|id,  Options|dict,  Procedure|uri]  • [CALL,  Request|id,  Options|dict,  Procedure|uri,  Arguments|list]  • [CALL,  Request|id,  Options|dict,  Procedure|uri,  Arguments|list,  ArgumentsKw|dict]  "

• [RESULT,  CALL.Request|id,  Details|dict]  • [RESULT,  CALL.Request|id,  Details|dict,  YIELD.Arguments|list]  • [RESULT,  CALL.Request|id,  Details|dict,  YIELD.Arguments|list,  YIELD.ArgumentsKw|dict]

• Array | List • Hash-table | Dictionary

Payload may be supplied as:

Transport

• Websocket • Raw TCP • HTTP long-polling (under dev) • Unix sockets

• Based on messages • Messages are ordered • Bidirectional message flow

Transport and Session

RouterClient

Transport and Session

RouterClientHELLO

Transport and Session

RouterClientHELLO

WELCOME

Transport and Session

RouterClientHELLO

WELCOME

ABORT

Transport and Session

RouterClientHELLO

WELCOME

GOODBYE

ABORT

Transport and Session

RouterClientHELLO

WELCOME

GOODBYE

ABORT

GOODBYE

Transport and Session

RouterClientHELLO

WELCOME

GOODBYE

ABORT

GOODBYE

GOODBYE

Transport and Session

RouterClientHELLO

WELCOME

GOODBYE

ABORT

GOODBYE

GOODBYE

GOODBYE

Publish / Subscribe

BrokerPublisher Subscriber

Publish / Subscribe

BrokerPublisher SubscriberSUBSCRIBE

Publish / Subscribe

BrokerPublisher SubscriberSUBSCRIBE

SUBSCRIBED

Publish / Subscribe

BrokerPublisher SubscriberSUBSCRIBE

SUBSCRIBED

ERROR

Publish / Subscribe

BrokerPublisher SubscriberSUBSCRIBE

SUBSCRIBED

ERROR

PUBLISH

Publish / Subscribe

BrokerPublisher SubscriberSUBSCRIBE

SUBSCRIBED

ERROR

PUBLISH

PUBLISHED

Publish / Subscribe

BrokerPublisher SubscriberSUBSCRIBE

SUBSCRIBED

ERROR

PUBLISH

PUBLISHED

ERROR

Publish / Subscribe

BrokerPublisher SubscriberSUBSCRIBE

SUBSCRIBED

ERROR

PUBLISH

PUBLISHED

ERROR

EVENT

Publish / Subscribe

BrokerPublisher SubscriberSUBSCRIBE

SUBSCRIBED

UNSUBSCRIBE

ERROR

PUBLISH

PUBLISHED

ERROR

EVENT

Publish / Subscribe

BrokerPublisher SubscriberSUBSCRIBE

SUBSCRIBED

UNSUBSCRIBE

UNSUBSCRIBED

ERROR

PUBLISH

PUBLISHED

ERROR

EVENT

Publish / Subscribe

BrokerPublisher SubscriberSUBSCRIBE

SUBSCRIBED

UNSUBSCRIBE

UNSUBSCRIBED

ERROR

ERROR

PUBLISH

PUBLISHED

ERROR

EVENT

Remote Procedure Calls

DealerCaller Callee

Remote Procedure Calls

DealerCaller CalleeREGISTER

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

ERROR

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

ERROR

CALL

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

ERROR

CALL

INVOCATION

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

ERROR

CALL

INVOCATION

YIELD

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

ERROR

CALL

INVOCATION

YIELD

ERROR

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

ERROR

CALL

RESULT

INVOCATION

YIELD

ERROR

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

ERROR

CALL

RESULT

INVOCATION

YIELD

ERROR

ERROR

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

UNREGISTER

ERROR

CALL

RESULT

INVOCATION

YIELD

ERROR

ERROR

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

UNREGISTER

UNREGISTERED

ERROR

CALL

RESULT

INVOCATION

YIELD

ERROR

ERROR

Remote Procedure Calls

DealerCaller CalleeREGISTER

REGISTERED

UNREGISTER

UNREGISTERED

ERROR

ERROR

CALL

RESULT

INVOCATION

YIELD

ERROR

ERROR

Profiles

• Basic profile • Advanced profile

Set of features within each pattern (PubSub, RPC)

Advanced profile

• Session Management • Authentication • Heartbeat

Advanced profile

• Publish / Subscribe • Black/white lists • Publisher identification • Pattern-based subscriptions • Meta events • Subscriber list • Events list

Advanced profile

• Remote Procedure Calls • black/white lists • Caller identification • Pattern-based RPC registration • Canceling calls • Progressive calls

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

subscribe to ‘ready.for.chat’

subscribe to ‘ready.for.chat’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

WAMP Router(realm 2)

subscribe to ‘chat.taken’

subscribe to ‘chat.taken’

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

subscribe to ‘user.chat.id1235’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

publish event to ‘ready.for.chat’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

receive event in ‘ready.for.chat’

receive event in ‘ready.for.chat’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

publish event to ‘chat.taken’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

receive event in ‘chat.taken’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

publish event to ‘user.chat.id1235’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

receive event in ‘user.chat.id1235’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

subscribe to ‘user.chat.id2425’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

publish event to ‘ready.for.chat’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

receive event in ‘ready.for.chat’

receive event in ‘ready.for.chat’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

publish event to ‘chat.taken’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

receive event in ‘chat.taken’WAMP Router

(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

publish event to ‘user.chat.id2425’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

receive event in ‘user.chat.id2425’

WAMP Router(realm 2)

Usage exampleOnline consultant

Browser

Embedded app

client

Browser

Embedded app

client

Browser

Backoffice app

client

Browser

Backoffice app

client

WAMP Router(realm 1)

Browser

Embedded app

client

Browser

Embedded app

client

WAMP Router(realm 2)

Usage example

Browser

Browser

Server side infrastructure

WAMP Router

Mobile

Desktop

REGI

STER

RPC

REG

ISTE

R RP

C REGISTER RPC

SUBSCRIBE to TOPICs

Internal service 1

SUBSCRIBE to TOPICs

Internal service 2

Internal service 3

Frontoffice app

client

Frontoffice app

client

CRUDN

gin

x /

HAPr

oxy

CRUD

CRUDBackoffice

appclient

SUBSCRIBE to TOPICs

PUBLISH Event PUBL

ISH

Even

t

CALL RPCs

Ngin

x /

HAPr

oxy

Backoffice app

client

DB

CRUD CRUD

Backoffice appserverside

Frontoffice appserverside

Integration solution

Prov

ides R

PC

Publ

ish e

vent

s

Subscribe to topicsProv

ides

RPC

Publish events

Service Provider 1

Service Provider 2

Service Provider 3

Service Provider 4

Service Provider 5

Publish events

WAMP Router(realm 1, realm 2, realm 3, ....)

Call R

PC

Call RPC

Subs

cribe

to to

pics

Publ

ish e

vent

s

Consumer 1 Consumer 2 Consumer 3 Consumer 4 Consumer 5

Usage exampleWAMP as a platform for SOA solutions

Usage exampleWAMP as a platform for SOA solutions

• Unified service bus • Asynchronous procedures execution • Standardization of interaction interfaces • Minimal overhead • Flexible infrastructure • Isolation and loose coupling of services • Easy to connect new services

Implementations

• JavaScript!• Autobahn|JS (browser, node.js) • Wampy.js (browser)

• Java!• Autobahn|Android (soon)

• .NET!• WampSharp (under dev)

• PHP!• Thurway

Clients• Python!

• Autobahn|Python • C++!

• Autobahn|Cpp • Erlang!

• Erwa • Objective-C!

• MDWamp • Lua (under dev)

Routers• Python!

• Autobahn|Python • Crossbar.io

• Erlang!• Erwa

• PHP!• Thurway

• Lua!• Wiola

Conclusion

• Simple and open protocol • RPC + PubSub out of the box • Unified routing • Transport and serialization for every taste • Minimal overhead • Native use in web applications • Allows you to build distributed applications with

loosely coupled components • Many implementations in different languages • Open source & community

Useful links

• http://wamp.ws!• Description • Specification • Implementations

• https://groups.google.com/group/wampws • http://autobahn.ws • https://github.com/crossbario/crossbar/wiki

• Crossbar.io • Client examples in different languages

That’s all folks!"Any questions

?

Konstantin Burkalev

Thank you!

• Mail: kostik@ksdaemon.ru • Twitter: @KSDaemon • GitHub: KSDaemon • Blog: blog.ksdaemon.ru