```ruby
require 'pathname'
require 'mysql2'
require 'dotenv'

$LOAD_PATH << File.expand_path("../lib", __FILE__)

require "p1_meter_reader"
require "output/database_writer"
require "output/last_measurement_store"
require "database_config"

ROOT_PATH = Pathname.new File.dirname(__FILE__)

Dotenv.load

environment = ENV.fetch('ENVIRONMENT')

database_connection = Mysql2::Client.new(DatabaseConfig.for(environment))

database_writer = DatabaseWriter.new(database_connection)
database_writer.save_interval = 15

last_measurement_store = LastMeasurementStore.new

if environment == "production"
  stream_splitter = P1MeterReader::DataParsing::StreamSplitter.new("/XMX5XMXABCE100129872")
else
  stream_splitter = P1MeterReader::DataParsing::FakeStreamSplitter.new
end

recorder = P1MeterReader::Recorder.new(measurement_source: stream_splitter)

recorder.collect_data do |measurement|
  database_writer.save_unless_exists(measurement)
  last_measurement_store.save(measurement)
end
```

Add retries for the initial MySQL connection.
user
```ruby
require 'pathname'
require 'mysql2'
require 'dotenv'

$LOAD_PATH << File.expand_path("../lib", __FILE__)

require "p1_meter_reader"
require "output/database_writer"
require "output/last_measurement_store"
require "database_config"

ROOT_PATH = Pathname.new File.dirname(__FILE__)

Dotenv.load

def main
  environment = ENV.fetch('ENVIRONMENT')

  database_connection = with_retries(log_message_format: "Retrying SQL connection (%d/%d)") do
    Mysql2::Client.new(DatabaseConfig.for(environment))
  end

  database_writer = DatabaseWriter.new(database_connection)
  database_writer.save_interval = 15

  last_measurement_store = LastMeasurementStore.new

  if environment == "production"
    stream_splitter = P1MeterReader::DataParsing::StreamSplitter.new("/XMX5XMXABCE100129872")
  else
    puts "Fake stream splitter"
    stream_splitter = P1MeterReader::DataParsing::FakeStreamSplitter.new
  end

  recorder = P1MeterReader::Recorder.new(measurement_source: stream_splitter)

  recorder.collect_data do |measurement|
    database_writer.save_unless_exists(measurement)
    last_measurement_store.save(measurement)
  end
end

def with_retries(max_tries: 5, log_message_format: "Retrying (%d/%d)")
  tries = 0

  begin
    yield
  rescue Mysql2::Error
    tries += 1

    if (tries > max_tries)
      raise
    end

    puts format(log_message_format, tries, max_tries)
    sleep 2

    retry
  end
end

puts "Starting..."
main
```
assistant