99 lines
3.2 KiB
Ruby
99 lines
3.2 KiB
Ruby
# --
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# Copyright (C) 2008-2009 10gen Inc.
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Affero General Public License, version 3, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License
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# for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# ++
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require 'mongo/db'
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module XGen
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module Mongo
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module Driver
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# Represents a Mongo database server.
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class Mongo
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DEFAULT_PORT = 27017
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# Either nodes_or_host is a host name string and port is an optional
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# port number that defaults to DEFAULT_PORT, or nodes_or_host is an
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# array of arrays, where each is a host/port pair (or a host with no
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# port). Finally, if nodes_or_host is nil then host is 'localhost' and
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# port is DEFAULT_PORT. Since that's so confusing, here are a few
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# examples:
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#
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# Mongo.new # localhost, DEFAULT_PORT
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# Mongo.new("localhost") # localhost, DEFAULT_PORT
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# Mongo.new("localhost", 3000) # localhost, 3000
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# Mongo.new([["localhost"]]) # localhost, DEFAULT_PORT
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# Mongo.new([["localhost", 3000]]) # localhost, 3000
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# Mongo.new([["db1.example.com", 3000], ["db2.example.com", 3000]]])
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#
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# When a DB object first connects, it tries nodes and stops at the
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# first one it connects to.
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def initialize(nodes_or_host=nil, port=nil)
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@nodes = case nodes_or_host
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when String
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[[nodes_or_host, port || DEFAULT_PORT]]
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when Array
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nodes_or_host.collect { |nh| [nh[0], nh[1] || DEFAULT_PORT] }
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when nil
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[['localhost', DEFAULT_PORT]]
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end
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end
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# Return the XGen::Mongo::Driver::DB named +db_name+. See DB#new for
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# +options+.
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def db(db_name, options={})
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XGen::Mongo::Driver::DB.new(db_name, @nodes, options)
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end
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# Returns a hash containing database names as keys and disk space for
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# each as values.
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def database_info
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admin_db = nil
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begin
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admin_db = db('admin')
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doc = admin_db.db_command(:listDatabases => 1)
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raise "error retrieving database info" unless admin_db.ok?(doc)
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h = {}
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doc['databases'].each { |db|
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h[db['name']] = db['sizeOnDisk'].to_i
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}
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h
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ensure
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admin_db.close
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end
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end
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# Returns an array of database names.
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def database_names
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database_info.keys
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end
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# Not implemented.
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def clone_database(from)
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raise "not implemented"
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end
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# Not implemented.
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def copy_database(from_host, from_db, to_db)
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raise "not implemented"
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end
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end
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end
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end
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end
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