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  • Reindex everything into Solr from Fedora!
    • ActiveFedora::Base.reindex_everything
  • opaquenamespaces: a community registry / namespace for RDF properties. Probably best practice to try to put locally-required properties there or somewhere similar. This was started by Karen and Tom at U Oregon.
  • Page numbers: can use this as literal sequence and put marked pagenumbers in page label property.
  • Book.where(title:"hat") # note this returns an array, not a single book object (the way find does)
  • re: IDs. consider using the default id as an internal identifier and another field as a local id for human use.
  • one challenge of hosting on amazon is moving large files around. sufia uses ffmpeg and converts them to playable proxies. anything that can be handled by imagemagick, openoffice / libreoffice (creates a thumbnail from the first page of the doc)
  • Currently recommending different heads for different types of collections. use a shared gem for the data models. Then create a separate admin head for managing them all in one place.
  • DCE also recommends keeping number of servers as low as possible until metrics indicate you should make changes (and can measure those changes on desired vectors)
  • Dspace, libguides, digital library publishing (drupal, node apps), archive-it – NYU harvests into hydra (ichabod) using Internet Archive API. metadata of record is in another system, but can be supplemented in the admin backend. Also have batch-loaded enrichment data.
  • fedora 4 implements w3c standard for access controls
  • REST vs. CRUD
    • GET, POST, PUT/PATCH, DELETE (ActiveFedora, HTTP)
    • Read, Ceate, Update, Delete - ActiveRecord (RDMS)
  • ORM - object relational mapper - the code that interfaces with the actual database
  • LDP is a way to use REST to talk about objects with containment relationships
  • Gemfile.lock shows the expansion of the gemfile
  • If developing on core, replace hydra gem with the gemspec contents of same if you want to mess with changing versions of those dependencies. (or if you want to manage / change these versions manually)
  • look at other peoples' .gitignore files for rails and sufia projects
  • What should our ID be? sufia uses NOIDs. note: fedora has a concept of different minters so this may be a factor here as well. NOID translates to fedora as pair paths, but fedora doesn't actually store it that way. so why did sufia do it this way?
  • characterization object contains xml. you could take each of those values and store them as properties.

 

Deployment

  • travis-ci.org/curationexperts/alexandria-v2/builds
  • https://travis-ci.org/projecthydra/sufia
  • capistrano: deployment manager. redundant with a ci workflow?

  • bambu - stanford's environment management solution.

  • PRODUCTION setup
    • tomcat, solr, fedora replace hydra-jetty / jetty wrapper
    • postgres as opposed to sqlite
    • WATCH RAILS VERSIONS between multithreading and databases
  • staging
    • may be as much like production as possible. may have less CPU power, less memory, smaller HD. May be an exact clone. Also take into account how much time / effort this may require.
  • ditch testunit and install rspec. spec directory:
    • spec
      • fixtures
        • pbcore
          • artesia
            • joyce_chen
              • image_1.xml
          • mars (filemaker database)
            • audio_1.xml
            • image_1.xml
  • look at fixtures vs. factories
    • fixtures have to be maintained.
    • factories behave the way you tell them to behave; sometimes you need to put in real data.
  • sandy metz railsconf 2013 presentation video
  • github.com/afred/openvault - look at factories here.
  • github.com/projecthydra-labs/hydradam
  • github.com/WGBH/pbucore
    • huge xslt stylesheet to convert XML into RDF-XML, which they will then use to load into fedora4.
  • Amazon Ops products: elastic beanstalk, opsworks

 

Testing

  • rspec only? selinium with rspec?
  • or capybara with cucumber?

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