Class: Chef::CouchDB

Inherits:
Object show all
Includes:
Mixin::ParamsValidate
Defined in:
lib/chef/couchdb.rb

Instance Method Summary collapse

Methods included from Mixin::ParamsValidate

#set_or_return, #validate

Constructor Details

#initialize(url = nil, db = Chef::Config[:couchdb_database]) ⇒ CouchDB

Returns a new instance of CouchDB.



36
37
38
39
40
 
# 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

Instance Method Details

#bulk_get(*to_fetch) ⇒ Object 



228
229
230
231
 
# 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) ⇒ Object 



42
43
44
 
# File 'lib/chef/couchdb.rb', line 42

def couchdb_database(args=nil)
  @db = args || @db
end

#create_db(check_for_existing = true) ⇒ Object 



72
73
74
75
76
77
78
 
# 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) ⇒ Object 



80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
 
# 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 ⇒ Object 



46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
 
# 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" => <<-EOJS
            function(doc) {
              emit([ doc.chef_type, doc.name], doc._id);
            }
          EOJS
        },
        "id_to_name" => {
          "map" => <<-EOJS
            function(doc) {
              emit(doc._id, [ doc.chef_type, doc.name ]);
            }
          EOJS
        }
      }
    }
  )
end

#db_stats ⇒ Object 



241
242
243
 
# File 'lib/chef/couchdb.rb', line 241

def db_stats
  @rest.get_rest("/#{@db}")
end

#delete(obj_type, name, rev = nil) ⇒ Object 



140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
 
# 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) ⇒ Object 



209
210
211
212
213
214
215
216
217
218
219
 
# 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 = {}) ⇒ Object 



221
222
223
224
225
226
 
# 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) ⇒ Boolean

Returns:

  • (Boolean) 


190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
 
# 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) ⇒ Object 



171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
 
# 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) ⇒ Object 



124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
 
# 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 ⇒ Object 



237
238
239
 
# File 'lib/chef/couchdb.rb', line 237

def server_stats
  @rest.get_rest('/')
end

#store(obj_type, name, object) ⇒ Object

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



100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
 
# 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) ⇒ Object 



233
234
235
 
# File 'lib/chef/couchdb.rb', line 233

def view_uri(design, view)
  "#{couchdb_database}/_design/#{design}/_view/#{view}"
end