WPS Provider

!include includes/skins.iuml skinparam backgroundColor #FFFFFF skinparam componentStyle uml2 !include target/rst/in/group___wps_provider.iuml

This component is an extension of Computing Resource for providing with WPS Server as a processing resource. It has two main functions:

  • analyses the GetCapabilities() function of the WPS server to retrieve all the process offered.
  • submits, controls and montiors processing over a WPS Server

Below, the sequence diagram describes the analaysis process to retrieve WPS services and parameters.

!define DIAG_NAME WPS Service Analysis Sequence Diagram participant "WebClient" as WC participant "WebServer" as WS participant "Provider" as P participant "Cloud Provider" as C participant "DataBase" as DB autonumber == Get Capabilities == WC -> WS: GetCapabilities request activate WS WS -> DB: Load all Providers (Proxy=true) loop on each provider WS -> DB: load services loop on each service WS -> WS: get service info (identifier, title, abstract) end end WS -> C: Load all Providers loop on each provider WS -> P: GetCapabilities WS -> WS: extract services from GetCapabilities using request identifier loop on each service WS -> WS: get service info (identifier, title, abstract) end end WS -> WS: aggregate all services info into response offering WS -> WC: return aggregated GetCapabilities deactivate WS == Describe Process == WC -> WS: DescribeProcess request activate WS alt case process from db WS -> DB: load service from request identifier WS -> DB: get provider url + service identifier on the provider else case process from cloud provider WS -> C: get service provider WS -> P: GetCapabilities WS -> WS: extract describeProcess url from GetCapabilities using request identifier end WS -> WS: build "real" describeProcess request WS -> P: DescribeProcess WS -> WC: return result from describeProcess deactivate WS == Execute == WC -> WS: Execute request activate WS alt case process from db WS -> DB: load service from request identifier WS -> DB: get provider url + service identifier on the provider else case process 'from cloud provider' WS -> C: get service provider WS -> P: GetCapabilities WS -> WS: extract execute url from GetCapabilities using request identifier end WS -> WS: build "real" execute request WS -> P: Execute alt case error WS -> WC: return error else case success WS -> DB: store job WS -> WS: update job RetrieveResultServlet url WS -> WC: return created job end deactivate WS == Retrieve Result Servlet == WC -> WS: RetrieveResultServlet request activate WS WS -> DB: load job info from request identifier WS -> P: call "real" statusLocation url WS -> WS: update href in response to put local server url instead of real provider WS -> WC: return updated statusLocation response deactivate WS == Search WPS process == WC -> WS: WPS search request activate WS WS -> DB: Load all Providers WS -> C: Load all Providers loop on each provider WS -> P: GetCapabilities WS -> WS: get services info loop on each service alt provider is Proxied WS -> WS: create local identifier and save remote identifier WS -> WS: use local server url as baseurl end WS -> WS: add service info to the response end end deactivate WS == Integrate WPS provider == WC -> WS: POST provider activate WS WS -> DB: store provider WS -> P: GetCapabilities WS -> WS: get services info loop on each service alt provider is Proxied WS -> WS: create local identifier and save remote identifier WS -> WS: use local server url as baseurl end WS -> DB: store service end footer DIAG_NAME (c) Terradue Srl endfooter

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Dependencies

  • extends Computing Resource for WPS specific resource
  • exports WPS Server as a computing resource as a OWS Context model.

Interfaces