Module: Embulk

Defined in:
lib/embulk.rb,
lib/embulk/page.rb,
lib/embulk/error.rb,
lib/embulk/buffer.rb,
lib/embulk/column.rb,
lib/embulk/plugin.rb,
lib/embulk/schema.rb,
lib/embulk/version.rb,
lib/embulk/guess/csv.rb,
lib/embulk/guess/gzip.rb,
lib/embulk/data_source.rb,
lib/embulk/java_plugin.rb,
lib/embulk/guess_plugin.rb,
lib/embulk/input_plugin.rb,
lib/embulk/page_builder.rb,
lib/embulk/filter_plugin.rb,
lib/embulk/guess/charset.rb,
lib/embulk/guess/newline.rb,
lib/embulk/output_plugin.rb,
lib/embulk/parser_plugin.rb,
lib/embulk/decoder_plugin.rb,
lib/embulk/encoder_plugin.rb,
lib/embulk/java/bootstrap.rb,
lib/embulk/plugin_registry.rb,
lib/embulk/formatter_plugin.rb,
lib/embulk/java/time_helper.rb,
lib/embulk/data/package_data.rb,
lib/embulk/file_input_plugin.rb,
lib/embulk/command/embulk_run.rb,
lib/embulk/file_output_plugin.rb,
lib/embulk/command/embulk_example.rb,
lib/embulk/command/embulk_new_plugin.rb,
lib/embulk/command/embulk_generate_bin.rb,
lib/embulk/data/bundle/embulk/input/example.rb,
lib/embulk/data/bundle/embulk/filter/example.rb,
lib/embulk/data/bundle/embulk/output/example.rb

Defined Under Namespace

Modules: Filter, Guess, Input, Java, Output, Plugin, Type Classes: Buffer, Column, ConfigError, DataSource, DecoderPlugin, EncoderPlugin, FileInputPlugin, FileOutputPlugin, FilterPlugin, FormatterPlugin, GuessPlugin, InputPlugin, JavaPlugin, LineGuessPlugin, OutputPlugin, PackageData, Page, PageBuilder, ParserPlugin, PluginLoadError, PluginManager, PluginRegistry, Schema, TextGuessPlugin

Constant Summary collapse

VERSION = 
"0.4.2"

Class Method Summary collapse

Class Method Details

.b(s) ⇒ Object 



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# File 'lib/embulk/command/embulk_generate_bin.rb', line 59

def self.b(s)
  s.force_encoding('ASCII-8BIT')
end

.create_example(path) ⇒ Object 



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# File 'lib/embulk/command/embulk_example.rb', line 2

def self.create_example(path)
  require 'fileutils'
  require 'zlib'

  puts "  Creating #{path}/"
  FileUtils.mkdir_p File.join(path, 'csv')
  puts "  Creating #{path}/csv/"

  puts "  Creating #{path}/csv/sample_01.csv.gz"
  Zlib::GzipWriter.open(File.join(path, 'csv', 'sample_01.csv.gz')) do |f|
    f.write <<EOF
id,account,time,purchase,comment
1,32864,2015-01-27 19:23:49,20150127,embulk
2,14824,2015-01-27 19:01:23,20150127,embulk jruby
3,27559,2015-01-28 02:20:02,20150128,embulk core
4,11270,2015-01-29 11:54:36,20150129,"Embulk ""csv"" parser plugin"
EOF
  end

  puts "  Creating #{path}/example.yml"
  File.open(File.join(path, 'example.yml'), 'w') do |f|
    f.write <<EOF
in:
type: file
path_prefix: "#{File.expand_path File.join(path, 'csv', 'sample_')}"
out:
type: stdout
EOF
  end
end

.generate_bin(options = {}) ⇒ Object 



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# File 'lib/embulk/command/embulk_generate_bin.rb', line 2

def self.generate_bin(options={})
  jruby_jar_path = org.jruby.Main.java_class.protection_domain.code_source.location.to_s
  if __FILE__ =~ /^classpath:/ || __FILE__.include?('!/')
    resource_class = org.embulk.command.Runner.java_class
    ruby_script_path = resource_class.resource("/embulk/command/embulk.rb").to_s
  else
    ruby_script_path = File.join(File.dirname(__FILE__), 'embulk.rb')
  end
  java_home = java.lang.System.properties['java.home']

  generate_bin_data(jruby_jar_path, ruby_script_path, options.merge(java_home: java_home))
end

.generate_bin_data(jruby_jar_path, ruby_script_path, options = {}) ⇒ Object 



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# File 'lib/embulk/command/embulk_generate_bin.rb', line 15

def self.generate_bin_data(jruby_jar_path, ruby_script_path, options={})
  if java_home = options[:java_home]
    java_home_script = %{export JAVA_HOME='#{java_home}'}
    java_path = %{"$JAVA_HOME"/bin/java}
  else
    java_home_script = %{}
    java_path = %{java}
  end

  # TODO parse -D options to set them to java
  shell_script = <<EOF
#!/bin/sh
=begin 2>/dev/null
#{java_home_script}
exec #{java_path} -classpath "$0" org.jruby.Main "$0" "$@"
exit 127
=end
EOF

  if options[:bundle_path] == :here
    bundle_path_script = %{ENV['EMBULK_BUNDLE_PATH'] = File.expand_path('..', File.dirname(__FILE__))}
  elsif path = options[:bundle_path]
    bundle_path_script = %{ENV['EMBULK_BUNDLE_PATH'] = '#{path}'}
  else
    bundle_path_script = b ''
  end

  ruby_init_script = b <<EOF
#{bundle_path_script}
ENV.delete 'GEM_HOME'
ENV.delete 'GEM_PATH'
EOF

  ruby_script = b(File.read(ruby_script_path))
  if i = ruby_script.index(b("\n__END__\n"))
    # delete contents after __END__
    ruby_script = ruby_script[0, i]
  end

  jruby_jar = b(File.read(jruby_jar_path))

  data = shell_script << ruby_init_script + ruby_script << b("\n__END__\n") << jruby_jar
end

.home(dir) ⇒ Object 



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# File 'lib/embulk/command/embulk_run.rb', line 279

def self.home(dir)
  home = File.expand_path('../../..', File.dirname(__FILE__))
  File.join(home, dir)
end

.java? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/embulk.rb', line 3

def self.java?
  true
end

.new_plugin(name, language, category) ⇒ Object 



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# File 'lib/embulk/command/embulk_new_plugin.rb', line 2

def self.new_plugin(name, language, category)
  require 'embulk/data/package_data'
  require 'embulk/version'
  require 'fileutils'

  embulk_category = category
  embulk_category = :input if category == :file_input
  embulk_category = :output if category == :file_output

  project_name = "embulk-#{embulk_category}-#{name}"
  plugin_path = "lib/embulk/#{embulk_category}/#{name}.rb"

  if File.exist?(project_name)
    raise "./#{project_name} already exists. Please delete it first."
  end
  FileUtils.mkdir_p(project_name)

  puts "Creating #{project_name}/"

  success = false
  begin
    author = `git config user.name`.strip
    author = "YOUR_NAME" if author.empty?
    email = `git config user.email`.strip
    email = "YOUR_NAME" if email.empty?

    ruby_class_name = name.split('-').map {|a| a.capitalize }.join + category.to_s.split('_').map {|a| a.capitalize }.join + "Plugin"
    java_iface = category.to_s.split('_').map {|a| a.capitalize }.join
    java_class_name = name.split('-').map {|a| a.capitalize }.join + java_iface + "Plugin"
    display_name = name.split('-').map {|a| a.capitalize }.join(' ')
    display_category = category.to_s.gsub('_', ' ')

    description =
      case category
      when :input
        %[that loads records from #{display_name} so that any output plugins can receive the records. Search the output plugins by 'embulk-output' keyword.]
      when :file_input
        %[that reads files from #{display_name} and parses the file using any parser plugins. Search the parser plugins by 'embulk-parser' keyword.]
      when :parser
        %[that parses #{display_name} file format read by any file input plugins. Search the file input plugins by 'embulk-input file' keywords.]
      when :decoder
        %[that decodes files encoded by #{display_name} read by any file input plugins. Search the file input plugins by 'embulk-input file' keywords.]
      when :output
        %[that loads records to #{display_name} read by any input plugins. Search the input plugins by 'embulk-input' keyword.]
      when :file_output
        %[that stores files to #{display_name} formatted by any formatter plugins. Search the formatter plugins by 'embulk-formatter' keyword.]
      when :formtter
        %[that formats records using #{display_name} file format and so that any file output plugins can store the files. Search the file output plugins by 'embulk-output file' keywords.]
      when :encoder
        %[that encodes files using #{display_name} so that any file output plugins can store the files. Search the file output plugins by 'embulk-output file' keywords.]
      when :filter
        %[that converts records read by an input plugin before passing it to an output plugins. Search the input and plugins by 'embulk-input' and 'embulk-output' plugins.]
      end

    pkg = Embulk::PackageData.new("new", project_name, binding())

    pkg.cp_erb("README.md.erb", "README.md")
    pkg.cp("LICENSE.txt", "LICENSE.txt")
    pkg.cp_erb("gitignore.erb", ".gitignore")

    case language
    when :ruby
      pkg.cp("ruby/Rakefile", "Rakefile")
      pkg.cp("ruby/Gemfile", "Gemfile")
      pkg.cp_erb("ruby/gemspec.erb", "#{project_name}.gemspec")
      pkg.cp_erb("ruby/#{category}.rb.erb", plugin_path)

    when :java
      pkg.cp("java/gradle/wrapper/gradle-wrapper.jar", "gradle/wrapper/gradle-wrapper.jar")
      pkg.cp("java/gradle/wrapper/gradle-wrapper.properties", "gradle/wrapper/gradle-wrapper.properties")
      pkg.cp("java/gradlew.bat", "gradlew.bat")
      pkg.cp("java/gradlew", "gradlew")
      pkg.set_executable("gradlew")
      pkg.cp_erb("java/build.gradle.erb", "build.gradle")
      pkg.cp_erb("java/plugin_loader.rb.erb", plugin_path)
      pkg.cp_erb("java/#{category}.java.erb", "src/main/java/org/embulk/#{embulk_category}/#{java_class_name}.java")
      pkg.cp_erb("java/test.java.erb", "src/test/java/org/embulk/#{embulk_category}/Test#{java_class_name}.java")
    end

    success = true
    puts ""
  ensure
    FileUtils.rm_rf project_name unless success
  end
end

.run(argv) ⇒ Object 



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# File 'lib/embulk/command/embulk_run.rb', line 2

def self.run(argv)
  # default_bundle_path
  default_bundle_path = nil
  gemfile_path = ENV['BUNDLE_GEMFILE'].to_s
  gemfile_path = nil if gemfile_path.empty?
  default_bundle_path = File.dirname(gemfile_path) if gemfile_path

  # default GEM_HOME is ~/.embulk/jruby/1.9/. If -b option is set,
  # GEM_HOME is already set by embulk/command/embulk.rb
  gem_home = ENV['GEM_HOME'].to_s
  if gem_home.empty?
    ENV['GEM_HOME'] = File.expand_path File.join(ENV['HOME'], '.embulk', Gem.ruby_engine, RbConfig::CONFIG['ruby_version'])
    Gem.clear_paths  # force rubygems to reload GEM_HOME
  end

  # to make sure org.embulk.jruby.JRubyScriptingModule can require 'embulk/java/bootstrap'
  $LOAD_PATH << Embulk.home('lib')

  if argv.include?('--version')
    require 'embulk/version'
    puts "embulk #{Embulk::VERSION}"
    exit 0
  end

  i = argv.find_index {|arg| arg !~ /^\-/ }
  usage nil unless i
  subcmd = argv.slice!(i)

  require 'java'
  require 'optparse'
  op = OptionParser.new

  load_paths = []
  classpaths = []
  classpath_separator = java.io.File.pathSeparator
  options = {}

  op.on('-b', '--bundle BUNDLE_DIR', 'Path to a Gemfile directory') do |path|
    # only for help message. implemented at lib/embulk/command/embulk.rb
  end

  case subcmd.to_sym
  when :bundle
    op.remove  # remove --bundle
    if default_bundle_path
      op.banner = "Usage: bundle [directory=#{default_bundle_path}]"
      args = 0..1
    else
      op.banner = "Usage: bundle <directory>"
      args = 1..1
    end

  when :run
    op.banner = "Usage: run <config.yml>"
    op.on('-I', '--load-path PATH', 'Add ruby script directory path ($LOAD_PATH)') do |load_path|
      load_paths << load_path
    end
    op.on('-C', '--classpath PATH', "Add java classpath separated by #{classpath_separator} (CLASSPATH)") do |classpath|
      classpaths.concat classpath.split(classpath_separator)
    end
    op.on('-o', '--output PATH', 'Path to a file to write the next configuration') do |path|
      options[:nextConfigOutputPath] = path
    end
    op.on('-r', '--resume-state PATH', 'Path to a file to write or read resume state') do |path|
      options[:resumeStatePath] = path
    end
    args = 1..1

  when :cleanup
    op.banner = "Usage: run <config.yml>"
    op.on('-I', '--load-path PATH', 'Add ruby script directory path ($LOAD_PATH)') do |load_path|
      load_paths << load_path
    end
    op.on('-C', '--classpath PATH', "Add java classpath separated by #{classpath_separator} (CLASSPATH)") do |classpath|
      classpaths.concat classpath.split(classpath_separator)
    end
    op.on('-r', '--resume-state PATH', 'Path to a file to write or read resume state') do |path|
      options[:resumeStatePath] = path
    end
    args = 1..1

  when :preview
    op.banner = "Usage: preview <config.yml>"
    op.on('-I', '--load-path PATH', 'Add ruby script directory path ($LOAD_PATH)') do |load_path|
      load_paths << load_path
    end
    op.on('-C', '--classpath PATH', "Add java classpath separated by #{classpath_separator} (CLASSPATH)") do |classpath|
      classpaths.concat classpath.split(classpath_separator)
    end
    args = 1..1

  when :guess
    op.banner = "Usage: guess <partial-config.yml>"
    op.on('-o', '--output PATH', 'Path to a file to write the guessed configuration') do |path|
      options[:nextConfigOutputPath] = path
    end
    op.on('-I', '--load-path PATH', 'Add ruby script directory path ($LOAD_PATH)') do |load_path|
      load_paths << load_path
    end
    op.on('-C', '--classpath PATH', "Add java classpath separated by #{classpath_separator} (CLASSPATH)") do |classpath|
      classpaths.concat classpath.split(classpath_separator)
    end
    args = 1..1

  when :new
    op.remove  # remove --bundle
    op.banner = "Usage: new <category> <name>" + %[
categories:
  ruby-input                 Ruby record input plugin    (like "mysql")
  ruby-output                Ruby record output plugin   (like "mysql")
  ruby-filter                Ruby record filter plugin   (like "add-hostname")
  #ruby-file-input           Ruby file input plugin      (like "ftp")          # not implemented yet [#21]
  #ruby-file-output          Ruby file output plugin     (like "ftp")          # not implemented yet [#22]
  #ruby-parser               Ruby file parser plugin     (like "csv")          # not implemented yet [#33]
  #ruby-formatter            Ruby file formatter plugin  (like "csv")          # not implemented yet [#34]
  #ruby-decoder              Ruby file decoder plugin    (like "gzip")         # not implemented yet [#31]
  #ruby-encoder              Ruby file encoder plugin    (like "gzip")         # not implemented yet [#32]
  java-input                 Java record input plugin    (like "mysql")
  java-output                Java record output plugin   (like "mysql")
  java-filter                Java record filter plugin   (like "add-hostname")
  java-file-input            Java file input plugin      (like "ftp")
  java-file-output           Java file output plugin     (like "ftp")
  java-parser                Java file parser plugin     (like "csv")
  java-formatter             Java file formatter plugin  (like "csv")
  java-decoder               Java file decoder plugin    (like "gzip")
  java-encoder               Java file encoder plugin    (like "gzip")

examples:
  new ruby-output hbase
  new ruby-filter int-to-string
]
    args = 2..2

  when :gem
    require 'rubygems/gem_runner'
    Gem::GemRunner.new.run argv
    exit 0

  when :example
    args = 0..1

  when :exec
    exec *argv
    exit 127

  else
    usage "Unknown subcommand #{subcmd.dump}."
  end

  begin
    op.parse!(argv)
    unless args.include?(argv.length)
      usage_op op, nil
    end
  rescue => e
    usage_op op, e.to_s
  end

  case subcmd.to_sym
  when :bundle
    path = argv[0] || default_bundle_path

    require 'fileutils'
    require 'rubygems/gem_runner'
    setup_load_paths(load_paths)
    setup_classpaths(classpaths)

    unless File.exists?(path)
      puts "Initializing #{path}..."
      FileUtils.mkdir_p File.dirname(path)
      begin
        success = false

        # copy embulk/data/bundle/ directory
        require 'embulk/data/package_data'
        pkg = PackageData.new("bundle", path)
        %w[.bundle/config embulk/input/example.rb embulk/output/example.rb embulk/filter/example.rb Gemfile].each do |file|
          pkg.cp(file, file)
        end

        ## TODO this is disabled for now. enable this if you want to use
        ## create bin/embulk
        #bin_embulk_path = File.join(path, 'bin', 'embulk')
        #FileUtils.mkdir_p File.dirname(bin_embulk_path)
        #require 'embulk/command/embulk_generate_bin'  # defines Embulk.generate_bin
        #File.open(bin_embulk_path, 'wb', 0755) {|f| f.write Embulk.generate_bin(bundle_path: :here) }

        # install bundler
        setup_gem_paths(path)
        Gem::GemRunner.new.run %w[install bundler]

        success = true
      rescue Gem::SystemExitException => e
        raise e if e.exit_code != 0
        success = true
      ensure
        FileUtils.rm_rf path unless success
      end
    else
      setup_gem_paths(path)
    end

    ENV['BUNDLE_GEMFILE'] = File.expand_path File.join(path, "Gemfile")
    Dir.chdir(path) do
      require 'bundler'
      require 'bundler/friendly_errors'
      require 'bundler/cli'
      Bundler.with_friendly_errors do
        # run > bundle install
        Bundler::CLI.start(%w[install], debug: true)
      end
    end

  when :example
    require_relative 'embulk_example'
    path = ARGV[0] || "embulk-example"
    puts "Creating #{path} directory..."
    Embulk.create_example(path)
    puts ""
    puts "Run following subcommands to try embulk:"
    puts ""
    puts "   1. guess #{File.join(path, 'example.yml')} -o config.yml"
    puts "   2. preview config.yml"
    puts "   3. run config.yml"
    puts ""

  when :new
    lang_cate = ARGV[0]
    name = ARGV[1]

    language, category = case lang_cate
      when "java-input"       then [:java, :input]
      when "java-output"      then [:java, :output]
      when "java-filter"      then [:java, :filter]
      when "java-file-input"  then [:java, :file_input]
      when "java-file-output" then [:java, :file_output]
      when "java-parser"      then [:java, :parser]
      when "java-formatter"   then [:java, :formatter]
      when "java-decoder"     then [:java, :decoder]
      when "java-encoder"     then [:java, :encoder]
      when "ruby-input"       then [:ruby, :input]
      when "ruby-output"      then [:ruby, :output]
      when "ruby-filter"      then [:ruby, :filter]
      when "ruby-file-input"  then raise "ruby-file-input is not implemented yet. See #21 on github." #[:ruby, :file_input]
      when "ruby-file-output" then raise "ruby-file-output is not implemented yet. See #22 on github." #[:ruby, :file_output]
      when "ruby-parser"      then raise "ruby-parser is not implemented yet. See #33 on github." #[:ruby, :parser]
      when "ruby-formatter"   then raise "ruby-formatter is not implemented yet. See #34 on github." #[:ruby, :formatter]
      when "ruby-decoder"     then raise "ruby-decoder is not implemented yet. See #31 on github." #[:ruby, :decoder]
      when "ruby-encoder"     then raise "ruby-decoder is not implemented yet. See #32 on github." #[:ruby, :encoder]
      else
        usage_op op, "Unknown category '#{lang_cate}'"
      end

    require 'embulk/command/embulk_new_plugin'
    Embulk.new_plugin(name, language, category)

  else
    require 'json'

    begin
      java.lang.Class.forName('org.embulk.command.Runner')
    rescue java.lang.ClassNotFoundException
      # load classpath
      classpath_dir = Embulk.home('classpath')
      jars = Dir.entries(classpath_dir).select {|f| f =~ /\.jar$/ }.sort
      jars.each do |jar|
        require File.join(classpath_dir, jar)
      end
    end

    setup_load_paths(load_paths)
    setup_classpaths(classpaths)

    org.embulk.command.Runner.new(options.to_json).main(subcmd, argv.to_java(:string))
  end
end

.setup_classpaths(classpaths) ⇒ Object 



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# File 'lib/embulk/command/embulk_run.rb', line 301

def self.setup_classpaths(classpaths)
  classpaths.each {|classpath|
    $CLASSPATH << classpath  # $CLASSPATH object doesn't have concat method
  }
end

.setup_gem_paths(path) ⇒ Object 



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# File 'lib/embulk/command/embulk_run.rb', line 286

def self.setup_gem_paths(path)
  # install bundler gem here & use bundler installed here
  ENV['GEM_HOME'] = File.expand_path File.join(path, Gem.ruby_engine, RbConfig::CONFIG['ruby_version'])
  ENV['GEM_PATH'] = ''
  Gem.clear_paths  # force rubygems to reload GEM_HOME
end

.setup_load_paths(load_paths) ⇒ Object 



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# File 'lib/embulk/command/embulk_run.rb', line 293

def self.setup_load_paths(load_paths)
  # first $LOAD_PATH has highet priority. later load_paths should have highest priority.
  load_paths.each do |load_path|
    # ruby script directory (use unshift to make it highest priority)
    $LOAD_PATH.unshift File.expand_path(load_path)
  end
end

.usage(message) ⇒ Object 



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# File 'lib/embulk/command/embulk_run.rb', line 307

def self.usage(message)
  STDERR.puts "usage: <command> [--options]"
  STDERR.puts "commands:"
  STDERR.puts "   bundle    [directory]                              # create or update plugin environment."
  STDERR.puts "   run       <config.yml>                             # run a bulk load transaction."
  STDERR.puts "   preview   <config.yml>                             # dry-run the bulk load without output and show preview."
  STDERR.puts "   guess     <partial-config.yml> -o <output.yml>     # guess missing parameters to create a complete configuration file."
  STDERR.puts "   gem       <install | list | help>                  # install a plugin or show installed plugins."
  STDERR.puts "                                                      # plugin path is #{ENV['GEM_HOME']}"
  STDERR.puts "   new       <category> <name>                        # generates new plugin template"
  STDERR.puts "   example   [path]                                   # creates an example config file and csv file to try embulk."
  STDERR.puts ""
  if message
    STDERR.puts "error: #{message}"
  else
    STDERR.puts "Use \`<command> --help\` to see description of the commands."
  end
  exit 1
end

.usage_op(op, message) ⇒ Object 



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# File 'lib/embulk/command/embulk_run.rb', line 327

def self.usage_op(op, message)
  STDERR.puts op.help
  STDERR.puts
  if message
    STDERR.puts message
  end
  exit 1
end