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The Line protocol handler parses simple text lines.

Important: Each line must end with a newline! Especially important when not using a file for input but e.g. TCPServer transport handler or AMQP/RabbitMQ transport handler.

Options

  • delay: Delay of reading in milliseconds (default 0). DEPRECATED: use scheduler.delay instead if not used together with delayeach
  • nanodelay: Delay of reading in nanoseconds (default 0).
  • delayeach: The number of lines between a delay is used (default 0).
  • checkdelay: Delay between reading attempts when the transport stream isn't ready. Useful for polling log files which are currently written to reduce I/O overhead (default 0).
  • readfirstline: Should the first line of the file be ignored (e.g. because of header information) (default: true)
  • debug: If set to true, some additional thinks are available: (default false)
  • dumpEachLine: Dumps lines to the console. if set to 1 each line will be dumped
  • measureEachLine: Measures the processing time between n elements that are dumped
  • lastLine/maxLines: Stop processing after n elements are read

Example

PQL

Line Protocol Handler
input = ACCESS({source='Line', wrapper='GenericPush',
transport='File',protocol='Line',
  dataHandler='Tuple',options=[['delay','100']],
  schema=[
    ['symbol','String'],
    ['points','Double'] ]
})

CQL

Line Protocol Handler
CREATE STREAM line (symbol String, points Double)   
    WRAPPER 'GenericPush'
    PROTOCOL 'Line'
    TRANSPORT 'File'
    DATAHANDLER 'Tuple'
    OPTIONS ( 'delay' '100')
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