Cloudant e XPages
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This document provides an overview of using Cloudant as a NoSQL database with XPages applications. It discusses why the author chose Cloudant for an HR application, introduces Cloudant and how it works, and shows how to connect to Cloudant from XPages using a Cloudant connector. Code examples demonstrate storing, retrieving, searching, and attaching files in Cloudant from XPages applications.
Cloudant e XPages
- 1. A (XPages) developers guide to Cloudant Frank van der Linden @flinden68
- 2. About me • Freelance Full stack Java developer, with XPages experience • Curious of new technology • Owner of elstar IT • Former IBM Champion (2013, 2014)
- 3. Roadmap • Why Cloudant • Introduction to Cloudant • Inside Cloudant • Connect to Cloudant • Cloudant @ XPages
- 4. Why Cloudant
- 5. Why Cloudant • For HR Assistant we wanted to use a different datastore
- 7. What is Cloudant • It is the cloud version of CouchDb • CouchDb is created by Damien Katz • Cloudant is bought by IBM • It is document based • Is like MongoDb or NSF a NoSQL datastore
- 8. What is Cloudant • Data stored as JSON • View and Search ‘formula’ with javascript • Replication • Tasks • Build in API • No annoying limitations
- 9. Cloudant as service • Cloudant can be added as service in BlueMix
- 10. Cloudant standalone • Via website cloudant.com
- 11. Inside Cloudant
- 12. Inside Cloudant
- 13. Inside Cloudant • View mapping • Search index
- 15. Connect to Cloudant • Direct via REST • https://someusername:[email protected] • Via a OSGi Plugin, uses the HTTPConnection • https://bitbucket.org/flinden68/cloudant-connector
- 16. Connect to Cloudant • Credentials • Account, necessary for the OSGi plugin
- 17. Connect to Cloudant • It is JSON everywhere • _rev and _id, reserved parameters • doc{}, is the actual data from application
- 18. Cloudant connector • Storing in and retrieving from Cloudant • Can be accessed from Java backend. • Will take out the security issues. • Do the heavy lifting. Don't reinvent the wheel. • https://bitbucket.org/flinden68/cloudant-connector
- 22. Cloudant @ XPages • Repeat in XPages • Columns - values from Job class
- 23. Cloudant @ XPages • JobController - getJobs
- 24. Cloudant @ XPages • Job Java Class
- 25. Cloudant @ XPages • CloudantDAO
- 26. Cloudant @ XPages • CloudantService - connect • Find the data in Cloudant
- 27. Cloudant @ XPages • Job JSON in Cloudant
- 28. Attachment @ Cloudant • Stored as base64 encoded String • Can be as standalone • Or as part of Document (we choose this way) • Store id as attachmentId, so it can be retrieved when needed
- 29. Attachment @ Cloudant • AttachmentDAO
- 30. Attachment @ Cloudant • AttachmentController • Convert upload to Attachment object
- 31. Attachment @ Cloudant • ControllerBase • All controllers can use these methods
- 32. Attachment @ Cloudant • Servlet is called in application for download • base64 data for the image tag
- 33. RichText @ Cloudant • Stored as MultiMimePart
- 34. RichText @ Cloudant • Which is nice converted to JSON ;-)
- 35. Search @ Cloudant • Cloudant job ftSearch index
- 36. Search @ Cloudant • Search example, filter the view
- 37. Search @ Cloudant • Do the search in the Controller, call DAO
- 38. Search @ Cloudant • Search method calls the CloudantService
- 39. Search @ Cloudant • CloudantService calls connector to get the data
- 40. Resources • OSGi Cloudant connector • https://bitbucket.org/flinden68/cloudant-connector • Cloudant documentation • https://docs.cloudant.com/ • HR Assistant • hrassistant.eu-gb.mybluemix.net • github.com/flinden68/HR-Assistant
- 42. Thank you