class LogStash::Filters::Checksum
This filter let's you create a checksum based on various parts of the logstash event. This can be useful for deduplication of messages or simply to provide a custom unique identifier.
This is VERY experimental and is largely a proof-of-concept
Constants
- ALGORITHMS
Public Instance Methods
filter(event)
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# File lib/logstash/filters/checksum.rb, line 34 def filter(event) return unless filter?(event) @logger.debug("Running checksum filter", :event => event) @keys.sort.each do |k| @logger.debug("Adding key to string", :current_key => k) @to_checksum << "|#{k}|#{event[k]}" end @to_checksum << "|" @logger.debug("Final string built", :to_checksum => @to_checksum) digested_string = OpenSSL::Digest.hexdigest(@algorithm, @to_checksum) @logger.debug("Digested string", :digested_string => digested_string) event['logstash_checksum'] = digested_string end
register()
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# File lib/logstash/filters/checksum.rb, line 28 def register require 'openssl' @to_checksum = "" end