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ECHO Extended Services

ECHO Extended Services. February 15, 2007. 1. Agenda. Review of Extended Services Policy and Governance ECHO’s Service Domain Model How to…. Extended Services Background. What are “Extended Services” “Services” - functional capabilities offered by the community

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ECHO Extended Services

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  1. ECHOExtended Services February 15, 2007 1

  2. Agenda • Review of Extended Services • Policy and Governance • ECHO’s Service Domain Model • How to…

  3. Extended Services Background • What are “Extended Services” • “Services” - functional capabilities offered by the community • “Extended” – because they are not native to ECHO • Published to the ECHO Registry • Functional Summary – What does ECHO do with them? • Register – Service Providers register the services • Activate – ECHO operations review and activate them. • Find – Users find the services using the UDDI inquiry API or Extended Services Viewer • Retrieve – Users can get the services to view their details • Update – Service Providers can update their services • Delete – Service Providers can remove their services

  4. Extended Services 8.0 Capabilities • Full CRUD for Extended Service Entities • Create • Read • Update • Delete • Allow for combined Service Interface/Implementation WSDL • Single registration sequence • Initial brokering of services • Invocation Service

  5. Extended Services 9.0 Additional Capabilities • Event Management • Publication of events for changes in the registry • Examples: New Service Interface, Service Deleted, Service Updated, etc. • Ability to subscribe to those events • Notification upon event occurrence • Event Summary • New Dataset • Updated Dataset • Deleted Dataset • New Service • Updated Service • Deleted Service • Based on WS-Eventing & -Notification

  6. Policy and Governance • Policy drives how an organization uses the tools available to them. • To protect the organization’s interests • ECHO is a partnership between NASA and ECHO participants • NASA has the responsibility to ensure that what it publicly represents is legitimate and appropriate • ECHO policy practices • Registered partners may publish • Form sent to ECHO Operations team • NASA approval • Two-phased Publication • Registration & Activation

  7. Registration & Activation Pattern

  8. ECHO’S Service Domain Model Provider

  9. Extended Services Entity:Web Service Interface • Defines a web service API • Defined in WSDL file • Hosted within ECHO system • Centrally managed interfaces encourages standardization and reuse within community • Reusable between provider organizations • Example: • Common Subsetting interface • Common Access service interface (OPeNDAP) • WMS service

  10. Extended Services Entity:Web Service Implementation • An executable web service hosted by an ECHO Service Provider • Defined in a WSDL file • Contains at least one service element • May implement interfaces registered in ECHO. • By importing interface WSDL from ECHO hosted location. • Examples: • An application-specific service (OPeNDAP Query adaptor) • A predictive model • Specific WMS server

  11. Extended Services Entity:Web Service GUI • A user interface for a web service. • Provides a way for human to interact with a web service. • Includes name, description, and access point • Associated with implementations and interfaces registered in ECHO. • Examples: • ECHO Query Client • Domain Specific User Client for subsetting

  12. Extended Services Entity:Advertisement • A way to advertise a service that is not a real Web Service. • Includes name and description of service and an access point. • Example • Service for expert advice on a specific application area • Ability to drop sensors in the Chesapeake Bay

  13. Categorization and Classification • Categorization • Process of creating categories or types • Classification • Process of assigning objects within categories

  14. Taxonomies • A way of classifying extended service entities in ECHO. • Have a tree like structure. • Root of the tree is the taxonomy. • Leaves and nodes on the tree are taxonomy entries • A taxonomy entry is a name and value pair. • Values are unique in a taxonomy.

  15. Virtual Taxonomies • This is a type of taxonomy that is populated by ECHO automatically. • They behave and look to the user like a regular static taxonomy.

  16. Existing Taxonomies in ECHO • nasa-ECHO:Dataset • The primary input type dataset taxonomy • Should be used to classify services where the dataset is the primary input to the service • Is a virtual taxonomy • As new datasets are added to ECHO this taxonomy grows • Contains: • Each Provider • Collections for that provider

  17. Existing Taxonomies in ECHO nasa-ECHO:Dataset Example data

  18. Existing Taxonomies in ECHO • nasa-ECHO:ServiceType – This is a categorization scheme of kinds of services from a functional perspective. It is comprised of other taxonomies defined by external organizations. • Currently contains: • ISO 19119 (OGC) • Specific OGC subgroups • OPeNDAP

  19. Existing Taxonomies in ECHO • nasa-ECHO:DataFormat – This is a categorization scheme based on the format of Earth Science data. It is similar to a mime-type classification scheme. • Currently contains • Complex • Graphical

  20. Classification within ECHO • Service Partners classify their service offerings • Upon Publication • Updates as needed • Classification is not required • But very useful • Multiplicity • Classify to zero or more Taxonomies • Classify to zero or more nodes within a Taxonomy

  21. How To… • What is available to use ECHO Extended Services • APIs • Documentation • Tools • Extended Services Scenarios • Register as a Service Provider • Publish a Web Service Interface • Publish a Web Service Implementation • Publish a Web Service GUI • Publish an Advertisement • Classify an offering • Update an offering • Delete an offering

  22. Using Extended Services • API’s available for all capabilities • Operational System • http://www.echo.nasa.gov/reference/reference.shtml • Currently available in ECHO Testbed • http://testbed.echo.nasa.gov/echo/apis.html • http://testbed.echo.nasa.gov/echo-wsdl/v9/ExtendedServicesService.wsdl • Extended Services Client tool • GUI for all management functions (CRUD) • Currently available in ECHO Testbed • Extended Services Viewer • Navigation tool to discover services • Operational System • http://api.echo.nasa.gov/echo-esviewer/ • Currently available in ECHO Testbed • http://testbed.echo.nasa.gov/echo-esviewer/

  23. ECHO Tools – Extended Services Client • Tool for Service Partners • Registration • Publishing Services • Any type • Classification • Manage Organizationalcontacts • Full CRUD

  24. ECHO Tools – Extended Services Viewer • Discovery and Navigation Tool for Services Registry • Each Categorization Scheme represented by a tree • Details of selected node presented in the right-hand panel

  25. Create an ECHO User Account • Click the "Sign Up" button. This will start the "ECHO Sign Up Wizard", guiding you through the process to create an ECHO User Account.

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  34. Register as a Service Provider • Goal • As an organization, offer your capabilities to the broader EO community • Prerequisites • Register as a User • Login as User • Once logged in to ECHO using the ECHO Extended Services Client, Select the "Transaction" button corresponding to the Registration Service. • Then select "Submit Provider Application". This will start the "Submit a Provider Application Wizard". 

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  42. Register as a Service Provider • In the “Additional Information” text area, provide the ECHO user account name that you would like associated with this provider or contact ECHO Ops @ echo@killians.gsfc.nasa.gov to have them associate your ECHO user account with the ECHO Service Provider.

  43. Register as a Service Provider • At this point your organization has been registered, but not activated. ECHO Operations has been notified of your registration and will review the application. Once they approve your application, you will be notified via email sent to the email address you supplied above.

  44. Register as a Service Provider • Once you are notified that your ECHO user account is associated with an ECHO Service Provider you can begin to register your Extended Service. • The next time you login, you will notice your Service Provider name listed in the “Provider” drop-down box.

  45. Publish a Web Service Interface • Under the “Transactions” for Extended Services you must register your Interface, Implementation, GUI or Advertisement service. ECHO Ops will then review your registration and notify you of your status.

  46. Publish a Web Service Interface • Goal • Offer a standard interface which can be used by multiple organizations. • Prerequisites • Be a registered User • Your organization is a Registered Service Provider • Login, with your provider context set to a Registered Service Provider • Have the Web Service Interface defined in a .wsdl file

  47. Publish a Web Service Implementation(using a Web Service Interface) • Goal • Offer a Service for access by the community • Prerequisites • Be a registered User • Your organization is a Registered Service Provider • Login, with your provider context set to a Registered Service Provider • Have the Web Service Implementation defined in a .wsdl file • Reference a published Web Service Interface

  48. Publish a Web Service GUI • Goal • Offer a GUI which provides a human interface to a published Web Service, for access by the community • Prerequisites • Be a registered User • Your organization is a Registered Service Provider • Login, with your provider context set to a Registered Service Provider • Reference a published Web Service Interface or specific Web Service Implementation

  49. Publish an Advertisement • Goal • Offer a capability which is not a Web Service, to the EO community • Prerequisites • Be a registered User • Your organization is a Registered Service Provider • Login, with your provider context set to a Registered Service Provider

  50. Classify an offering • Goal • Enable better discovery by classifying your offering in one or more taxonomies • Can be done in registration, or by updating • Prerequisites • Be a registered User • Your organization is a Registered Service Provider • Login, with your provider context set to a Registered Service Provider • A registered service offering has been (or is being) published

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