Web Application Messaging Protocol: Difference between revisions

Revision as of 22:47, 27 February 2024

Latest revision as of 07:51, 3 November 2024

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Unlike with traditional RPCs, which are addressed directly from a caller to the entity offering the procedure (typically a server backend) and are strictly unidirectional (client-to-server), RPCs in WAMP are routed by a middleware and work bidirectionally.

Registration of RPCs is with the WAMP router, and calls to procedures are similarly issued to the WAMP router. This means first of all that a client can issue all RPCs via the single connection to the WAMP router, and does not need to have any knowledge what client is currently offering the procedure, where that client resides or how to address it. This can indeed change between calls, opening up the possibility for advanced features such as [[Load balancing (computing)|load-balancing]] or fail-over for procedure calls.

It additionally means that all WAMP clients are equal in that they can offer procedures for calling. This avoids the traditional distinction between clients and server backends, and allows architectures where browser clients call procedures on other browser clients, with an API that feels like peer to peer communication.

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! Language

|-

| [https://github.com/voryx/angular-wamp AngularWAMP]

| [[JavaScript]] for the [[AngularJS]] framework

|-

| [https://github.com/tavendo/AutobahnCpp AutobahnCpp]

| [[C++]] 11

|-

| wamplv

| [https://github.com/samangh/wamplv wamplv]

| [[LabVIEW]] (G)

|-

| [https://github.com/crossbario/autobahn-js AutobahnJS]

| JavaScript ([[Web browser|browser]] and [[Node.js]])

|-

| [https://github.com/crossbario/autobahn-python AutobahnPython]

| [[Python (programming language)|Python]]

|-

| wampy

| [https://github.com/noisyboiler/wampy/ wampy]

| [[Python (programming language)|Python]]

|-

| [https://metacpan.org/pod/Net::WAMP Net::WAMP]

| [[Perl]]

|-

| [https://github.com/darrrk/backbone.wamp backbone.WAMP]

| JavaScript for the [[Backbone.js]] library

|-

| [https://github.com/ecorm/cppwamp CppWAMP]

| C++ 11

|-

| Erwa

| [https://github.com/bwegh/erwa Erwa]

| [[Erlang (programming language)|Erlang]]

|-

| Jawampa

| [https://github.com/Matthias247/jawampa Jawampa]

| [[Java (programming language)|Java]]

|-

| [| [https://github.com/KSDaemon/Loowy Loowy]

| [[Lua (programming language)|Lua]]

|-

| MDWamp

| [https://github.com/mogui/MDWamp MDWamp]

| [[Objective-C]]

|-

| Minion

| [https://github.com/Vinelab/minion Minion]

| [[PHP]]

|-

| rx.wamp

| [https://github.com/paulpdaniels/rx.wamp rx.wamp]

| JavaScript for the [[React (JavaScript library)|React]] library

|-

| [https://github.com/voryx/Thruway Thruway]

| PHP

|-

| [https://github.com/rafzi/WAMP_POCO WAMP POCO]

| C++

|-

| wampcc

| [https://github.com/darrenjs/wampcc wampcc]

| C++

|-

| [https://github.com/Code-Sharp/WampSharp WampSharp]

| [[C Sharp (programming language)|C#]]

|-

| [https://github.com/KSDaemon/wampy.js Wampy.js]

| JavaScript (browser only)

|-

| nexus

| [https://github.com/gammazero/nexus nexus]

| [[Go (programming language)|Go]]

|}

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However, the persistent nature of WebSocket connections requires the use of non-blocking libraries and [[Asynchronous I/O|asynchronous]] [[Application programming interface|API]]s. In languages with one official mechanism such as JavaScript, Erlang or Go, this is not an issue. But for languages with several competing solutions for asynchronous programming, such as Python or PHP, it forces the client author to commit to a specific part of the ecosystem.

For the same reason, integrating legacy projects can also require work. As an example, most popular Web Python frameworks are using [[Web Server Gateway Interface|WSGI]], a synchronous API, and running a WAMP client inside a WSGI worker needs manual adapters such as [https://pypi.python.org/pypi/crochet crochet].

===Routers===

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! Language

|-

| Bondy

| [https://docs.getbondy.io Bondy] {{Webarchive|url=https://web.archive.org/web/20191230232140/https://docs.getbondy.io/ |date=2019-12-30 }}

| [[Erlang (programming language)|Erlang]]

|-

| Crossbar.io

| [http://crossbar.io Crossbar.io] {{Webarchive|url=https://web.archive.org/web/20150112071519/http://crossbar.io/ |date=2015-01-12 }}

| Python (CPython and [[PyPy]])

|-

| Erwa

| [https://github.com/bwegh/erwa Erwa]

| Erlang

|-

| wampcc

| [https://github.com/darrenjs/wampcc wampcc]

| C++

|-

| Jawampa

| [https://github.com/Matthias247/jawampa Jawampa]

| Java

|-

| [https://github.com/voryx/Thruway Thruway]

| PHP

|-

| wamp.rt

| [https://www.npmjs.com/package/wamp.rt wamp.rt]

| JavaScript (Node.js only)

|-

| [https://github.com/Code-Sharp/WampSharp WampSharp]

| C#

|-

| Wiola

| [https://ksdaemon.github.io/wiola/ Wiola]

| [[Lua (programming language)|Lua]]

|-

| [https://github.com/christian-raedel/nightlife-rabbit Nightlife-Rabbit]

| JavaScript (Node.js only)

|-

| nexus

| [https://github.com/gammazero/nexus nexus]

| [[Go (programming language)|Go]]

|}

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|

|-

| [https://capnproto.org/ Capn'n'Proto]

|

| {{ya}}

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|

|-

| [https://github.com/sockjs SockJS]

|

|