.. This work is licensed under a Creative Commons Attribution 4.0 International License. .. http://creativecommons.org/licenses/by/4.0 .. Copyright 2017 Huawei Technologies Co., Ltd. .. _swagger_sdk: Swagger SDK =========== Swagger -------- Swagger helps on following aspects: * Define REST API based on OAS standard, as swagger.json * Auto generate the REST service code, using swagger.json with swagger annotations. * Auto generate the client sdk code, using swagger.json in different language * Provides readable REST API document using swagger.json And for implementing mirco-services, swagger is being an default technology. Problems in mirco-services development -------------------------------------- Following problem occurs in micro-service based products as there is no process exist to govern them: * Most of the time, developers manually authors the swagger REST API document, and it leads to inconsistent between the actual REST API implementation and API defined the document. * For mirco-services, developer starts to write the client sdk manually and which will also brings inconsistent between actual REST API provided by mirco-service and the client SDK implementation. * Client SDK in different languages become an huge effort involved and most of time, teams do not provide the client SDK in required languages of different micro-service, dependenting on another micro-service. * When depending services (B) changes the REST API, its only detected at system testing and integration testing phase of dependent service (A). Because client SDK of B is implemented by service A team, because service A does not provide the client SDK in required language as mentioned above. To address these problems, Swagger-SDK is brought into ONAP, as ONAP is mirco-service based architecture. What does Swagger-SDK provide: ------------------------------ It provides feature in build-time and run-time. Build-time feature ------------------ * Generate the java client SDK for those services, which provides swagger.json already and deploy it in nexus in following package :: [ Project Maven Group-id] ::[ Project maven artifact-id]-java-sdk :: [project maven version] * Generate the swagger.json for those services, which is already annotated with swagger java annotations. Also it deploy it in nexus in following package :: [ Project Maven Group-id] ::[ Project maven artifact-id]-swagger-schema :: [project maven version] MSB is already supported with this feature. Run-time feature ---------------- * Provides an RESP API controller for reporting swagger.json at pre-defined URI. And it helps to maintain the same URI across different servicse in ONAP, by making use of it. Also it helps to generate swagger.json at run-time if a given service is already annotated with swagger annotations. * It does support only for java based swagger enabled RESTful services.