Class: SphinxDataAccessor

Inherits:
Object
  • Object
show all
Defined in:
lib/logstash/filters/sphinx.rb

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ SphinxDataAccessor

Returns a new instance of SphinxDataAccessor.



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# File 'lib/logstash/filters/sphinx.rb', line 14

def initialize(config)

  @redis_user_conn = Redis.new(:host => config["redis_host"], :port => config["redis_port"], :db => config["redis_user_db"])
  @redis_record_conn = Redis.new(:host => config["redis_host"], :port => config["redis_port"], :db => config["redis_record_db"])
  @redis_host_conn = Redis.new(:host => config["redis_host"], :port => config["redis_port"], :db => config["redis_host_db"])
  @pg_conn = ConnectionPool::Wrapper.new(size: 8, timeout: 3) { PG::connect(:host => config["pg_host"], :user => config["pg_user"], :password => config["pg_password"], :dbname => config["pg_dbname"]) }

end

Instance Method Details

#add_host(user_id, hostname) ⇒ Object 



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# File 'lib/logstash/filters/sphinx.rb', line 50

def add_host(user_id, hostname)

  # check redis cache first

  host = get_host_from_redis(user_id, hostname)
  return if host

  # create a host entry if not in the database

  begin
    host = create_host(user_id, hostname)
    insert_host_into_pg(host)

    set_host_in_redis(user_id, hostname, host)

  rescue => e
    puts e.message

  end



end

#get_record(md5) ⇒ Object 



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# File 'lib/logstash/filters/sphinx.rb', line 74

def get_record(md5)


  # check the redis cache

  record = get_record_from_redis(md5)
  if record

    # Return it only if the record contains reputation meta data.

    # We learn this by checking the existence of the 'reputation_timestamp' key

    # which is only set by the backend after checking with VT (or other data source)

    if record["reputation_timestamp"]
      puts "#{md5}: Cache hit with data"
      return record
    else
      puts "#{md5}: Cache hit with no data"
      return nil
    end

  end


  # we couldn't find it in the cache. Check the db

  record = get_record_from_pg(md5)

  if record


    # Return it only if the record contains reputation meta data.

    # We learn this by checking the existence of the 'reputation_timestamp' key

    # which is only set by the backend after checking with VT (or other data source)

    if record["reputation_timestamp"]
      puts "#{md5}: DB hit with data"

      # cache it in redis

      set_record_in_redis(md5, record)
      return record

    else
      puts "#{md5}: DB hit with no data"

      empty_record = create_new_record(md5)
      set_record_in_redis(md5, empty_record)
      return nil
    end

  else

    puts "#{md5}: NO hit. Inserting a new record into DB and Cache"

    # Insert this md5 entry into the reference_hash table with a blank reputation timestamp.

    # This way the backend can update this entry accordingly

    record = create_new_record(md5)
    insert_record_into_pg(record)

    # Insert this into

    set_record_in_redis(md5, record)

    # NOTE: this new record is not returned to the user as it contains no reputation meta data.

    return nil

  end

  return nil

end

#get_user(access_id, access_key) ⇒ Object 



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# File 'lib/logstash/filters/sphinx.rb', line 24

def get_user(access_id, access_key)

  # sanity check for user inputs

  if access_id.nil? || access_key.nil?
    return nil
  end

  if access_id.strip == '' || access_key == ''
    return nil
  end

  # check redis first

  user = get_user_from_redis(access_id, access_key)
  return user if user

  user = get_user_from_pg(access_id, access_key)

  if user
    set_user_in_redis(access_id, access_key, user)
  end

  return user
end