Google App Engine with Gaelyk
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Malaysia Open Source Conference 2011 presentation on Gaelyk.
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Google App Engine with Gaelyk
- 1. Google App Engine with Gaelyk Easy cloud development. Or why using Gaelyk is like cheating the cloud development game.
- 2. About me #java #groovy #grails #android #iphone-dev #clojure #lisp #agile #ruby #jruby #macruby #favoriteMedium #software_architect #cloud #gae
- 4. Teach Yourself Gaelyk in 30 minutes • Introduction to Google App Engine • Overview of Gaelyk • Getting Started • Future of GAE and Gaelyk
- 7. Guillaume Laforge Head of Groovy Development at SpringSource http://www.slideshare.net/glaforge
- 8. Software as a Service Gmail, SalesForce Platform as a Service Google App Engine Infrastructure as a Service Amazon EC2, Azure
- 9. Platform as a Service Google App Engine
- 10. Gaelyk Services • Template pages • Datastore (similar to NoSQL) • Email • XMPP (Jabber e.g., Gtalk) • Multi-tenant(namespace) • Caching (Memcache)
- 12. • Download “gaelyk-template-project” • Create groovy class • Create gtpl template pages • dev_appserver.sh war • http://localhost:8080/
- 14. URL Routing / Simple URL routings config in routes.groovy / get "/about", redirect: "/general/about.html"
- 15. URL Routing / Advance URL routings config in routes.groovy / get “/project/@id”, forward: “/project.groovy?id=@id” get “/delete/@id”, forward: “/delete.groovy?id=@id” get “/more/*”, forward: ”/more.groovy” / More involved example / get “/edit/@project/@id”, forward: “/edit.groovy?id=@id&project=@project”
- 16. Controller / Simple Groovlet controller / def name = params.name def now = new Date() request.now = now request.name = name forward “hello.gtpl”
- 17. Views/Templates <body> <% def name = params.name def message = "Hi ${name} Hello World!" %> <p> ${message} </p> </body>
- 18. Views/Templates (2) <% def user = session.user %> <html> <body> <% if (user) { %> <p>You are currently logged in.</p> <% } else { %> <p>You're not logged in.</p> <% } %> </body> </html>
- 19. Datastore (1) / Create and save entity data / def project = new Entity(“project”) project.name = “Kickass Web Application” project.owner = bob.key.id project.createdDate = new Date() project.save()
- 20. Datastore (2) def project = new Entity(“project”) project.name = “Kickass Web Application” project.owner = bob.key.id project.createdDate = new Date() project.save() //...sometime to delete data project.delete()
- 21. Datastore (3) / Querying data / def query = new Query(“project”) query.addSort(“createdDate”, SortDirection.DESCENDING) query.addFilter(“name”, FilterOperator.EQUAL, “Kickass Project”) def preparedQuery = datastore.prepare(query) def results = preparedQuery.adList( withLimit(20) )
- 22. Datastore (4) / Querying data with more Groovy meta-programming / def query = new Query(“project”) .addSort(“createdDate”, SortDirection.DESCENDING) .addFilter(“name”, FilterOperator.EQUAL, “Kickass Project”) def results = datastore.prepare(query).asList( withLimit(20) )
- 23. Datastore (5) / Latest Query DSL -- Not release yet / 'SELECT * FROM projects WHERE name = “Kickass Project” ORDER BY createdDate DESC'
- 24. <!-- Making use of results from controller --> <% def results = request.results %> <ul> ! <% results.each { result -> %> ! ! <li> ! ! ! ${result.name} ! ! </li> ! <% } %> </ul>
- 25. Datastore (4) / Create and save entity data / / in “Project X” context / namespace.of(“projectX”) { def project = new Entity(“project”) project.name = “Kickass Web Application” project.owner = bob.key.id project.createdDate = new Date() project.save() }
- 26. Email / Sending email / mail.send from: "app-admin-email@gmail.com", to: "recipient@somecompany.com", subject: "Re: Invoice", textBody: "Hi, here’s the latest invoice", attachment: [data: "Latest Invoice , fileName: "invoice.doc"]
- 27. Deployment / Running on local for development / dev_appserver.sh war / Deploy to GAE / appcfg.sh update war
- 30. • AndroidRockeeet.appspot.com • Android deployment tool • From concept to 1st deploy = 5 hours • Beta testing now • Never concerned about scaling
- 31. What’s missing from this talk? Plugins Billing Quota Advance API Apps market integration ...
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