Vägen till REST

Vägen till REST En länk i taget Rickard Öberg, Jayway

Hur det började

Uppdraget

Vägvalet

VägvaletRMI?

VägvaletRMI?SOAP?

VägvaletRMI?SOAP?REST?

På upptäcktsfärd

Richardson Maturity model

Richardson Maturity model Level 0 SOAP, XML RPC, POX – Single URI

Richardson Maturity model Level 0 SOAP, XML RPC, POX – Single URI Level 1 URI Tunnelling – Many URIs, Single verb

Richardson Maturity model Level 0 SOAP, XML RPC, POX – Single URI Level 1 URI Tunnelling – Many URIs, Single verb Level 2 Many URIs, many verbs CRUD services (e.g. Amazon S3)

Richardson Maturity model Level 0 SOAP, XML RPC, POX – Single URI Level 1 URI Tunnelling – Many URIs, Single verb Level 2 Many URIs, many verbs CRUD services (e.g. Amazon S3) Level 3 Level 2 + Hypermedia – RESTful Services

REST till räddning!“Representational State Transfer (REST)is a style of software architecture fordistributed hypermedia systems such asthe World Wide Web”

RiktlinjernaClient–serverStatelessCacheableLayered systemUniform interface http://en.wikipedia.org/wiki/Representational_State_Transfer#Constraints

Fler riktlinjerIdentiﬁcation of resourcesManipulation of resources throughthese representationsSelf-descriptive messagesHypermedia As The Engine OfApplication State (HATEOAS)

Den smala vägen

Vad ska vi exponera? Klient Data Server

Vad ska vi exponera? Klient Domänmodell Server

Hur?Servlets?

Hur?Servlets?JAX-RS?

Hur?Servlets?JAX-RS?Restlet

Hur?Servlets?JAX-RS?Restlet www.restlet.org

What the...?

What the...?/users/rickard/changepassword/users/rickard/resetpassword

Var är HATEOAS?!?“The next control state of an application resides in therepresentation of the ﬁrst requested resource, … Theapplication state is controlled and stored by the useragent … anticipate changes to that state (e.g., link mapsand prefetching of representations) … The modelapplication is therefore an engine that moves from onestate to the next by examining and choosing fromamong the alternative state transitions in the current setof representations.” - Roy Fielding

Vad gör vi nu då?

Ett steg i taget

Vad ska vi exponera? Klient Användarfall Server

Ur användarens perspektiv

Ur användarens perspektiv/account/changepassword/administration/server/users/rickard/resetpassword

Vem får göra vad?/workspace/cases/<123>//administrator/.../overview/...

Följ den namngivna länken

Följ den namngivna länken REST API

Följ den namngivna länkenQuery REST API

Följ den namngivna länken LinksQuery REST API

Följ den namngivna länken Links LinkQuery REST API

Följ den namngivna länken Links LinkQuery Command REST API

Samtidigare REST API

SamtidigareQuery Last-Modiﬁed REST API

Samtidigare LinksQuery Last-Modiﬁed REST API

Samtidigare Links LinkQuery Last-Modiﬁed REST API

Samtidigare Links LinkQuery Last-Modiﬁed If-Unmodiﬁed-Since Command REST API

LänktestFinns länken?

Varianter av data/workspace/cases/search/search Accept-Header: text/html/workspace/cases/search/search.json/workspace/cases/search/search.html/workspace/cases/search/search.atom

SäkerhetAutenticering BASIC AUTH + HTTPSAuktorisering /administration/...

VersioneringHATEOAS hjälperExponera usecases hjälperSkicka header Ex. X-STREAMFLOW-API: 1.2Klientbibliotek

Wohoo!

Q&Arickard.oberg@jayway.com @rickardoberghttp://jroller.com/rickard http://qi4j.org

Vägen till REST

by Rickard Öberg on Nov 24, 2010

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Vägen till REST — Presentation Transcript