Class: Fluent::BigObjectOutput::TableElement

Inherits:
Object
  • Object
show all
Includes:
Configurable
Defined in:
lib/fluent/plugin/out_bigobject.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(log, bo_hostname, bo_port) ⇒ TableElement

Returns a new instance of TableElement.



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# File 'lib/fluent/plugin/out_bigobject.rb', line 31

def initialize(log, bo_hostname, bo_port)
  super()
  @log = log
  @bo_hostname = bo_hostname
  @bo_port = bo_port
  @bo_url="http://#{@bo_hostname}:#{@bo_port}/cmd"
end

Instance Attribute Details

#mpattern ⇒ Object (readonly)

Returns the value of attribute mpattern.



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# File 'lib/fluent/plugin/out_bigobject.rb', line 29

def mpattern
  @mpattern
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_bigobject.rb', line 39

def configure(conf)
  super
  if (@table==nil)&&(@schema_file==nil)
    raise "Table name and schema_file cannot be both nil. Please specify <schema_file> if using avro input or <table> is using restful api." 
  end 
  if (isBinary) 
    @avro_schema = Avro::Schema.parse(File.open(@schema_file, "rb").read)
    @avro_writer = Avro::IO::DatumWriter.new(@avro_schema)
  else 
    @avro_schema = nil
    @avro_writer = nil
  end

  @mpattern = Fluent::MatchPattern.create(pattern)
  @mapping = (@column_mapping==nil)? nil:parse_column_mapping(@column_mapping)
  @log.info("column mapping for #{table} - #{@mapping}")
  @format_proc = Proc.new { |record|
    if (@mapping==nil)
      record
    else
      new_record = {}
      @mapping.each { |k, c|
        new_record[c] = record[k]
        }
      new_record
    end
  }
end

#isBinary ⇒ Object 



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# File 'lib/fluent/plugin/out_bigobject.rb', line 68

def isBinary()
  return !(@schema_file.to_s.empty?)
end

#send(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_bigobject.rb', line 138

def send(chunk)
    if (isBinary) 
      send_binary(chunk)
    else 
      send_rest(chunk)
    end
end

#send_binary(chunk) ⇒ Object

Send data to Bigobject using binary AVRO



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

def send_binary(chunk)
  
  buffer = StringIO.new()      
  dw = Avro::DataFile::Writer.new(buffer, @avro_writer, @avro_schema)
  i=0
  chunk.msgpack_each { |tag, time, data|
     data = @format_proc.call(data)
     dw<<data
     i+=1
  }
  dw.flush

  begin
    socket = TCPSocket.open(@bo_hostname, @bo_port)
    begin
      #timeout=60
      opt = [1, 60].pack('I!I!')  # { int l_onoff; int l_linger; }
      socket.setsockopt(Socket::SOL_SOCKET, Socket::SO_LINGER, opt)
  
      opt = [60, 0].pack('L!L!')  # struct timeval
      socket.setsockopt(Socket::SOL_SOCKET, Socket::SO_SNDTIMEO, opt)
      socket.write(buffer.string)
    ensure
      socket.close
    end
    
  rescue Exception => e 
      @log.error(e.message)  
      raise "Failed to send_binary: #{e.message}"
  end
  @log.debug("bigobject send #{i} rows")
end

#send_rest(chunk) ⇒ Object

Send Data to Bigobject using Restful API



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# File 'lib/fluent/plugin/out_bigobject.rb', line 73

def send_rest(chunk)
  stmts = Array.new
  i=0
  columns = nil
  chunk.msgpack_each { |tag, time, data|
     keys = Array.new
     values = Array.new
     data = @format_proc.call(data)
     data.keys.sort.each do |key|
       keys << key
       values << data[key].to_json
     end
     if columns.to_s.empty?
       columns = "(#{keys.join(",")})"
     end
     stmts.push("(#{values.join(",")})")
     #stmts.push("(\"#{values.join("\",\"")}\")")
     i+=1
  }
  
  sendStmt = "INSERT INTO #{@table}  #{columns} VALUES" + stmts.join(",")
  resp = sendBO(@bo_url, sendStmt)
  parsed = JSON.parse(resp)
  err = parsed['Err']
  if (err.to_s!='')
    @log.error("[BigObject] #{err}")
  end
  @log.debug("bigobject insert #{i} rows")
  
end

#to_s ⇒ Object 



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# File 'lib/fluent/plugin/out_bigobject.rb', line 146

def to_s
  "table:#{table}, column_mapping:#{column_mapping}, pattern:#{pattern}"
end