Class: Fluent::YohoushiOutput

Inherits:
BufferedOutput
  • Object
show all
Defined in:
lib/fluent/plugin/out_yohoushi.rb

Defined Under Namespace

Classes: PlaceholderExpander, RubyPlaceholderExpander

Constant Summary collapse

MAPPING_MAX_NUM = 
20
KEY_MAX_NUM = 
20

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ YohoushiOutput 



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 8

def initialize
  super
  require 'socket'
  require 'multiforecast-client'
  require 'yohoushi-client'
end

Instance Attribute Details

#client ⇒ Object (readonly)

for test



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 47

def client
  @client
end

#key_pattern ⇒ Object (readonly)

Returns the value of attribute key_pattern.



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 50

def key_pattern
  @key_pattern
end

#key_pattern_path ⇒ Object (readonly)

Returns the value of attribute key_pattern_path.



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 51

def key_pattern_path
  @key_pattern_path
end

#keys ⇒ Object (readonly)

Returns the value of attribute keys.



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 49

def keys
  @keys
end

#mapping ⇒ Object (readonly)

Returns the value of attribute mapping.



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 48

def mapping
  @mapping
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 53

def configure(conf)
  super

  if @base_uri
    @client = Yohoushi::Client.new(@base_uri)
  else
    @mapping = {}
    (1..MAPPING_MAX_NUM).each do |i|
      next unless conf["mapping#{i}"]
      from, to = conf["mapping#{i}"].split(/ +/, 2)
      raise ConfigError, "mapping#{i} does not contain 2 parameters" unless to
      @mapping[from] = to
    end
    @client = MultiForecast::Client.new('mapping' => @mapping) unless @mapping.empty?
  end
  raise ConfigError, "Either of `base_uri` or `mapping1` must be specified" unless @client

  if @key_pattern
    key_pattern, @key_pattern_path = @key_pattern.split(/ +/, 2)
    raise ConfigError, "key_pattern does not contain 2 parameters" unless @key_pattern_path
    @key_pattern = Regexp.compile(key_pattern)
  else
    @keys = {}
    (1..KEY_MAX_NUM).each do |i|
      next unless conf["key#{i}"] 
      key, path = conf["key#{i}"].split(/ +/, 2)
      raise ConfigError, "key#{i} does not contain 2 parameters" unless path
      @keys[key] = path
    end
  end
  raise ConfigError, "Either of `key_pattern` or `key1` must be specified" if (@key_pattern.nil? and @keys.empty?)

  @placeholder_expander =
    if @enable_ruby
      # require utilities which would be used in ruby placeholders
      require 'pathname'
      require 'uri'
      require 'cgi'
      RubyPlaceholderExpander.new
    else
      PlaceholderExpander.new
    end

  @hostname = Socket.gethostname
rescue => e
  raise ConfigError, "#{e.class} #{e.message} #{e.backtrace.first}"
end

#expand_placeholder(value, time, record, opts) ⇒ Object 



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 157

def expand_placeholder(value, time, record, opts)
  @placeholder_expander.prepare_placeholders(time, record, opts)
  @placeholder_expander.expand(value)
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 119

def format(tag, time, record)
  [tag, time, record].to_msgpack
end

#post(path, number) ⇒ Object 



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 109

def post(path, number)
  if @enable_float_number
    @client.post_graph(path, { 'number' => number.to_f, 'mode' => @mode.to_s })
  else
    @client.post_graph(path, { 'number' => number.to_i, 'mode' => @mode.to_s })
  end
rescue => e
  $log.warn "out_yohoushi: #{e.class} #{e.message} #{path} #{e.backtrace.first}"
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 105

def shutdown
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 101

def start
  super
end

#tag_prefix(tag_parts) ⇒ Object 



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 162

def tag_prefix(tag_parts)
  return [] if tag_parts.empty?
  tag_prefix = [tag_parts.first]
  1.upto(tag_parts.size-1).each do |i|
    tag_prefix[i] = "#{tag_prefix[i-1]}.#{tag_parts[i]}"
  end
  tag_prefix
end

#tag_suffix(tag_parts) ⇒ Object 



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 171

def tag_suffix(tag_parts)
  return [] if tag_parts.empty?
  rev_tag_parts = tag_parts.reverse
  rev_tag_suffix = [rev_tag_parts.first]
  1.upto(tag_parts.size-1).each do |i|
    rev_tag_suffix[i] = "#{rev_tag_parts[i]}.#{rev_tag_suffix[i-1]}"
  end
  rev_tag_suffix.reverse
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_yohoushi.rb', line 123

def write(chunk)
  chunk.msgpack_each do |tag, time, record|
    tag_parts = tag.split('.')
    tag_prefix = tag_prefix(tag_parts)
    tag_suffix = tag_suffix(tag_parts)
    placeholders = {
      'tag' => tag,
      'tags' => tag_parts, # for lower compatibility
      'tag_parts' => tag_parts,
      'tag_prefix' => tag_prefix,
      'tag_suffix' => tag_suffix,
      'hostname' => @hostname,
    }
    if @key_pattern
      record.each do |key, value|
        next unless key =~ @key_pattern
        placeholders['key'] = key
        path = expand_placeholder(@key_pattern_path, time, record, placeholders)
        post(path, value)
      end
    else # keys
      @keys.each do |key, path|
        next unless value = record[key]
        placeholders['key'] = key
        path = expand_placeholder(path, time, record, placeholders)
        post(path, value)
      end
    end
  end
rescue => e
  $log.warn "out_yohoushi: #{e.class} #{e.message} #{e.backtrace.first}"
  # Here, no raise of an error, so this BufferedOutput does not retry
end