### Home Classes Methods

### In Files

- lib/chef/couchdb.rb

### Parent

Object

### Methods

- ::new
- #bulk_get
- #couchdb_database
- #create_db
- #create_design_document
- #create_id_map
- #db_stats
- #delete
- #find_by_name
- #get_view
- #has_key?
- #list
- #load
- #server_stats
- #store
- #view_uri

### Included Modules

- Chef::Mixin::ParamsValidate

### Files

- LICENSE
- README.rdoc

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# Chef::CouchDB

### Public Class Methods

new(url=nil, db=Chef::Config[:couchdb_database]) click to toggle source

    # File lib/chef/couchdb.rb, line 36
    def initialize(url=nil, db=Chef::Config[:couchdb_database])
      url ||= Chef::Config[:couchdb_url]
      @db = db
      @rest = Chef::REST.new(url, nil, nil)
    end

### Public Instance Methods

bulk_get(*to_fetch) click to toggle source

    # File lib/chef/couchdb.rb, line 228
    def bulk_get(*to_fetch)
      response = @rest.post_rest("#{couchdb_database}/_all_docs?include_docs=true", { "keys" => to_fetch.flatten })
      response["rows"].collect { |r| r["doc"] }
    end

couchdb_database(args=nil) click to toggle source

    # File lib/chef/couchdb.rb, line 42
    def couchdb_database(args=nil)
      @db = args || @db
    end

create_db(check_for_existing=true) click to toggle source

    # File lib/chef/couchdb.rb, line 72
    def create_db(check_for_existing=true)
      @database_list = @rest.get_rest("_all_dbs")
      if !check_for_existing || !@database_list.any? { |db| db == couchdb_database }
        response = @rest.put_rest(couchdb_database, Hash.new)
      end
      couchdb_database
    end

create_design_document(name, data) click to toggle source

    # File lib/chef/couchdb.rb, line 80
    def create_design_document(name, data)
      to_update = true
      begin
        old_doc = @rest.get_rest("#{couchdb_database}/_design/#{name}")
        if data["version"] != old_doc["version"]
          data["_rev"] = old_doc["_rev"]
          Chef::Log.debug("Updating #{name} views")
        else
          to_update = false
        end
      rescue
        Chef::Log.debug("Creating #{name} views for the first time because: #{$!}")
      end
      if to_update
        @rest.put_rest("#{couchdb_database}/_design%2F#{name}", data)
      end
      true
    end

create_id_map() click to toggle source

    # File lib/chef/couchdb.rb, line 46
    def create_id_map
      create_design_document(
        "id_map",
        {
          "version" => 1,
          "language" => "javascript",
          "views" => {
            "name_to_id" => {
              "map" =>                 function(doc) {                  emit([ doc.chef_type, doc.name], doc._id);                }
            },
            "id_to_name" => {
              "map" =>                 function(doc) {                  emit(doc._id, [ doc.chef_type, doc.name ]);                }
            }
          }
        }
      )
    end

db_stats() click to toggle source

    # File lib/chef/couchdb.rb, line 241
    def db_stats
      @rest.get_rest("/#{@db}")
    end

delete(obj_type, name, rev=nil) click to toggle source

    # File lib/chef/couchdb.rb, line 140
    def delete(obj_type, name, rev=nil)
      validate(
        {
          :obj_type => obj_type,
          :name => name,
        },
        {
          :obj_type => { :kind_of => String },
          :name => { :kind_of => String },
        }
      )
      del_id = nil
      object, uuid = find_by_name(obj_type, name, true)
      unless rev
        if object.respond_to?(:couchdb_rev)
          rev = object.couchdb_rev
        else
          rev = object['_rev']
        end
      end
      response = @rest.delete_rest("#{couchdb_database}/#{uuid}?rev=#{rev}")
      response.couchdb = self if response.respond_to?(:couchdb=)

      if object.respond_to?(:delete_from_index)
        Chef::Log.info("Sending #{obj_type}(#{uuid}) to the index queue for deletion..")
        object.delete_from_index(:database => couchdb_database, :id => uuid, :type => obj_type)
      end

      response
    end

find_by_name(obj_type, name, with_id=false) click to toggle source

    # File lib/chef/couchdb.rb, line 209
    def find_by_name(obj_type, name, with_id=false)
      r = get_view("id_map", "name_to_id", :key => [ obj_type, name ], :include_docs => true)
      if r["rows"].length == 0
        raise Chef::Exceptions::CouchDBNotFound, "Cannot find #{obj_type} #{name} in CouchDB!"
      end
      if with_id
        [ r["rows"][0]["doc"], r["rows"][0]["id"] ]
      else
        r["rows"][0]["doc"]
      end
    end

get_view(design, view, options={}) click to toggle source

    # File lib/chef/couchdb.rb, line 221
    def get_view(design, view, options={})
      view_string = view_uri(design, view)
      view_string << "?" if options.length != 0
      view_string << options.map { |k,v| "#{k}=#{URI.escape(v.to_json)}"}.join('&')
      @rest.get_rest(view_string)
    end

has_key?(obj_type, name) click to toggle source

    # File lib/chef/couchdb.rb, line 190
    def has_key?(obj_type, name)
      validate(
        {
          :obj_type => obj_type,
          :name => name,
        },
        {
          :obj_type => { :kind_of => String },
          :name => { :kind_of => String },
        }
      )
      begin
        find_by_name(obj_type, name)
        true
      rescue
        false
      end
    end

list(view, inflate=false) click to toggle source

    # File lib/chef/couchdb.rb, line 171
    def list(view, inflate=false)
      validate(
        {
          :view => view,
        },
        {
          :view => { :kind_of => String }
        }
      )
      if inflate
        r = @rest.get_rest(view_uri(view, "all"))
        r["rows"].each { |i| i["value"].couchdb = self if i["value"].respond_to?(:couchdb=) }
        r
      else
        r = @rest.get_rest(view_uri(view, "all_id"))
      end
      r
    end

load(obj_type, name) click to toggle source

    # File lib/chef/couchdb.rb, line 124
    def load(obj_type, name)
      validate(
        {
          :obj_type => obj_type,
          :name => name,
        },
        {
          :obj_type => { :kind_of => String },
          :name => { :kind_of => String },
        }
               )
      doc = find_by_name(obj_type, name)
      doc.couchdb = self if doc.respond_to?(:couchdb)
      doc
    end

server_stats() click to toggle source

    # File lib/chef/couchdb.rb, line 237
    def server_stats
      @rest.get_rest('/')
    end

store(obj_type, name, object) click to toggle source

Save the object to Couch. Add to index if the object supports it.

    # File lib/chef/couchdb.rb, line 100
    def store(obj_type, name, object)
      validate(
        {
          :obj_type => obj_type,
          :name => name,
          :object => object,
        },
        {
          :object => { :respond_to => :to_json },
        }
      )
      rows = get_view("id_map", "name_to_id", :key => [ obj_type, name ])["rows"]
      uuid = rows.empty? ? UUIDTools::UUID.random_create.to_s : rows.first.fetch("id")

      db_put_response = @rest.put_rest("#{couchdb_database}/#{uuid}", object)

      if object.respond_to?(:add_to_index)
        Chef::Log.info("Sending #{obj_type}(#{uuid}) to the index queue for addition.")
        object.add_to_index(:database => couchdb_database, :id => uuid, :type => obj_type)
      end

      db_put_response
    end

view_uri(design, view) click to toggle source

    # File lib/chef/couchdb.rb, line 233
    def view_uri(design, view)
      "#{couchdb_database}/_design/#{design}/_view/#{view}"
    end

[Validate]

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