Class: LogStash::Outputs::Mongo

Inherits:
Base
  • Object
show all
Defined in:
lib/logstash/outputs/mongo.rb

Overview

This output writes events to MongoDB.

Constant Summary collapse

@@mutex =

Mutex used to synchronize access to ‘documents’

Mutex.new

Instance Method Summary collapse

Instance Method Details

#buildStatement(document) ⇒ Object 



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# File 'lib/logstash/outputs/mongo.rb', line 101

def buildStatement(document)

  statement = {}

  @attributes.each do |attr|
      # filter attributes for not null validation
      if document[attr] != nil
        statement[attr] = document[attr]
      end
  end

  return statement

end

#close ⇒ Object 



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# File 'lib/logstash/outputs/mongo.rb', line 116

def close
  @closed.make_true
end

#receive(event) ⇒ Object 



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# File 'lib/logstash/outputs/mongo.rb', line 50

def receive(event)
  begin
    # Our timestamp object now has a to_bson method, using it here
    # {}.merge(other) so we don't taint the event hash innards
    document = {}.merge(event.to_hash)

    @logger.debug("Type=[#{@type}] Collection=[#{@collection}] _id=[#{document["_id"]}]")

    case @type

    when "upsert"
      statement = buildStatement(document)

      @db[event.sprintf(@collection)].update_one(
        { '_id' => document["_id"]},
        { '$set' => statement},
        :upsert => true
      )

    when "update"
      statement = buildStatement(document)

      @db[event.sprintf(@collection)].update_one(
        { '_id' => document["_id"]},
        { '$set' => statement}
      )

    when "insert"
      @db[event.sprintf(@collection)].insert_one(document)

    when "delete"
      @db[event.sprintf(@collection)].delete_one({ '_id' => document["_id"]})

    end

  rescue => e
    if e.message =~ /^E11000/
      # On a duplicate key error, skip the insert.
      # We could check if the duplicate key err is the _id key
      # and generate a new primary key.
      # If the duplicate key error is on another field, we have no way
      # to fix the issue.
      @logger.warn("Skipping insert because of a duplicate key error", :event => event, :exception => e)
    else
      @logger.warn("Failed to send event to MongoDB, retrying in #{@retry_delay.to_s} seconds", :event => event, :exception => e)
      sleep(@retry_delay)
      retry
    end
  end
end

#register ⇒ Object 



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# File 'lib/logstash/outputs/mongo.rb', line 41

def register

  Mongo::Logger.logger = @logger
  conn = Mongo::Client.new(@uri)
  @db = conn.use(@database)

  @closed = Concurrent::AtomicBoolean.new(false)
end