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#
# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Christopher Brown (<cb@opscode.com>)
# Copyright:: Copyright (c) 2008 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require 'chef/mixin/params_validate'
require 'chef/config'
require 'chef/rest'
require 'chef/log'
require 'digest/sha2'
require 'json'
# We want to fail on create if uuidtools isn't installed
begin
require 'uuidtools'
rescue LoadError
end
class Chef
class CouchDB
include Chef::Mixin::ParamsValidate
def initialize(url=nil, db=Chef::Config[:couchdb_database])
url ||= Chef::Config[:couchdb_url]
@db = db
@rest = Chef::REST.new(url, nil, nil)
end
def couchdb_database(args=nil)
@db = args || @db
end
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
def create_db
@database_list = @rest.get_rest("_all_dbs")
unless @database_list.detect { |db| db == couchdb_database }
response = @rest.put_rest(couchdb_database, Hash.new)
end
couchdb_database
end
def create_design_document(name, data)
create_db
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
# Save the object to Couch. Add to index if the object supports it.
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
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
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
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
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
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
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
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
def view_uri(design, view)
"#{couchdb_database}/_design/#{design}/_view/#{view}"
end
end
end
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