Class: Oplogreplayer::Replayer

Inherits:
Object
  • Object
show all
Defined in:
lib/oplogreplayer/replayer.rb

Class Method Summary collapse

Class Method Details

.m2m(options) ⇒ Object 



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# File 'lib/oplogreplayer/replayer.rb', line 10

def self.m2m(options)

  config = options[:config]
  timestamp = options[:timestamp]

  log = Log4r::Logger.new('Oplogreplayer::Replayer')
  log.outputters = Log4r::StdoutOutputter.new(STDERR)
  log.level = Log4r::INFO
  self.parseConfig(@_config, config)

  sourceConfig = @_config["source"]

  connect_uri = "mongodb://"
  connect_uri += "#{sourceConfig["username"]}:#{sourceConfig["password"]}@" if sourceConfig["username"] and sourceConfig["password"]
  connect_uri += "#{sourceConfig["host"]}"
  connect_uri += "?replicaSet=#{sourceConfig["replicaSet"]}"

  log.info("Setting up client for source")
  rsClient = Mongo::MongoReplicaSetClient.from_uri(connect_uri)

  log.info("Configuring tailer")
  tailer = Mongoriver::Tailer.new([rsClient], :existing)

  log.info("Creating mongo2mongo bridge")
  bridge = Oplogreplayer::Mongobridge.new(@_config["dest"])

  log.info("Creating a stream between tailer and bridge")
  stream = Mongoriver::Stream.new(tailer, bridge)

  # If a timestamp is supplied as an argument, override.
  if timestamp
    log.info("Replaying. Timestamp provided, overriding and starting at #{timestamp}")
    stream.run_forever(timestamp)
  elsif @_config["resume"]
    log.info("Replaying. No timestamp provided but resume is enabled, will resume based on target's last timestamp")
    # otherwise, try and resume.
    # We need persistence of the oplog. Not sure whether to use local fs or destination mongo
    # destination mongo seems better suited though. I'm going to use the local db for now.
    stream.run_forever(bridge.getOplogTimestamp)
  else
    # No timestamp and no resume.... we're doing a full replay.
    log.info("Replaying. No resume and no timestamp - full oplog replay.")
    stream.run_forever()
  end
end

.parseConfig(target, configFile) ⇒ Object 



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# File 'lib/oplogreplayer/replayer.rb', line 56

def self.parseConfig(target, configFile)
  if ! ::File.exists?(configFile)
    raise NoConfigFileError, "Config file not found: #{configFile}"
  end

  conf = YAML::load_file(configFile)
  target.merge! conf
end

.setupLogging ⇒ Object 



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# File 'lib/oplogreplayer/replayer.rb', line 65

def self.setupLogging()

end