Class: MoSQL::CLI

Inherits:
Object
  • Object
show all
Includes:
Logging
Defined in:
lib/mosql/cli.rb

Constant Summary collapse

BATCH = 
1000

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Logging

#log

Constructor Details

#initialize(args) ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/mosql/cli.rb', line 19

def initialize(args)
  @args    = args
  @options = []
  @done    = false
  setup_signal_handlers
end

Instance Attribute Details

#args ⇒ Object (readonly)

Returns the value of attribute args.



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# File 'lib/mosql/cli.rb', line 12

def args
  @args
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/mosql/cli.rb', line 12

def options
  @options
end

#tailer ⇒ Object (readonly)

Returns the value of attribute tailer.



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# File 'lib/mosql/cli.rb', line 12

def tailer
  @tailer
end

Class Method Details

.run(args) ⇒ Object 



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# File 'lib/mosql/cli.rb', line 14

def self.run(args)
  cli = CLI.new(args)
  cli.run
end

Instance Method Details

#connect_mongo ⇒ Object 



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# File 'lib/mosql/cli.rb', line 119

def connect_mongo
  @mongo = Mongo::MongoClient.from_uri(options[:mongo])
  config = @mongo['admin'].command(:ismaster => 1)
  if !config['setName'] && !options[:skip_tail]
    log.warn("`#{options[:mongo]}' is not a replset.")
    log.warn("Will run the initial import, then stop.")
    log.warn("Pass `--skip-tail' to suppress this warning.")
    options[:skip_tail] = true
  end
  options[:service] ||= config['setName']
end

#connect_sql ⇒ Object 



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# File 'lib/mosql/cli.rb', line 131

def connect_sql
  @sql = MoSQL::SQLAdapter.new(@schema, options[:sql], options[:schema])
  if options[:verbose] >= 2
    @sql.db.sql_log_level = :debug
    @sql.db.loggers << Logger.new($stderr)
  end
end

#load_collections ⇒ Object 



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# File 'lib/mosql/cli.rb', line 139

def load_collections
  collections = YAML.load_file(@options[:collections])
  begin
    @schema = MoSQL::Schema.new(collections)
  rescue MoSQL::SchemaError => e
    log.error("Error parsing collection map `#{@options[:collections]}':")
    log.error(e.to_s)
    exit(1)
  end
end

#parse_args ⇒ Object 



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# File 'lib/mosql/cli.rb', line 35

def parse_args
  @options = {
    :collections => 'collections.yml',
    :sql    => 'postgres:///',
    :mongo  => 'mongodb://localhost',
    :verbose => 0
  }
  optparse = OptionParser.new do |opts|
    opts.banner = "Usage: #{$0} [options] "

    opts.on('-h', '--help', "Display this message") do
      puts opts
      exit(0)
    end

    opts.on('-v', "Increase verbosity") do
      @options[:verbose] += 1
    end

    opts.on("-c", "--collections [collections.yml]", "Collection map YAML file") do |file|
      @options[:collections] = file
    end

    opts.on("--sql [sqluri]", "SQL server to connect to") do |uri|
      @options[:sql] = uri
    end

    opts.on("--mongo [mongouri]", "Mongo connection string") do |uri|
      @options[:mongo] = uri
    end

    opts.on("--schema [schema]", "PostgreSQL 'schema' to namespace tables") do |schema|
      @options[:schema] = schema
    end

    opts.on("--ignore-delete", "Ignore delete operations when tailing") do
      @options[:ignore_delete] = true
    end

    opts.on("--only-db [dbname]", "Don't scan for mongo dbs, just use the one specified") do |dbname|
      @options[:dbname] = dbname
    end

    opts.on("--tail-from [timestamp]", "Start tailing from the specified UNIX timestamp") do |ts|
      @options[:tail_from] = ts
    end

    opts.on("--service [service]", "Service name to use when storing tailing state") do |service|
      @options[:service] = service
    end

    opts.on("--skip-tail", "Don't tail the oplog, just do the initial import") do
      @options[:skip_tail] = true
    end

    opts.on("--reimport", "Force a data re-import") do
      @options[:reimport] = true
    end

    opts.on("--no-drop-tables", "Don't drop the table if it exists during the initial import") do
      @options[:no_drop_tables] = true
    end

    opts.on("--unsafe", "Ignore rows that cause errors on insert") do
      @options[:unsafe] = true
    end

    # eg, --oplog-filter '{"ns": {"$regex": "^somedb[0-9]*\\.collection$"}}'
    opts.on("--oplog-filter [filter]", "An additional JSON filter for the oplog query") do |filter|
      @options[:oplog_filter] = JSON.parse(filter)
    end
  end

  optparse.parse!(@args)

  log = Log4r::Logger.new('Stripe')
  log.outputters = Log4r::StdoutOutputter.new(STDERR)
  if options[:verbose] >= 1
    log.level = Log4r::DEBUG
  else
    log.level = Log4r::INFO
  end
end

#run ⇒ Object 



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# File 'lib/mosql/cli.rb', line 150

def run
  parse_args
  load_collections
  connect_sql
  connect_mongo

  metadata_table = MoSQL::Tailer.create_table(@sql.db, 'mosql_tailers')

  @tailer = MoSQL::Tailer.new([@mongo], :existing, metadata_table,
                              :service => options[:service])

  @streamer = Streamer.new(:options => @options,
                           :tailer  => @tailer,
                           :mongo   => @mongo,
                           :sql     => @sql,
                           :schema  => @schema)

  @streamer.import

  unless options[:skip_tail]
    @streamer.optail
  end
end

#setup_signal_handlers ⇒ Object 



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# File 'lib/mosql/cli.rb', line 26

def setup_signal_handlers
  %w[TERM INT USR2].each do |sig|
    Signal.trap(sig) do
      log.info("Got SIG#{sig}. Preparing to exit...")
      @streamer.stop
    end
  end
end