Module: Fly::RegionalDatabase

Defined in:
lib/fly-ruby/regional_database.rb

Overview

Note that using instance variables in Rack middleware is considered a poor practice in multithreaded environments. Instead of using dirty tricks like using Object#dup, values are passed to methods.

Defined Under Namespace

Classes: DbExceptionHandlerMiddleware, ReplayableRequestMiddleware

Class Method Summary collapse

Class Method Details

.replay_in_primary_region!(state:) ⇒ Object

Stop the current request and ask for it to be replayed in the primary region. Pass one of three states to the target region, to determine how to handle the request:

Possible states: captured_write, http_method, threshold captured_write: A write was rejected by the database http_method: A non-idempotent HTTP method was replayed before hitting the application threshold: A recent write set a threshold during which all requests are replayed



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# File 'lib/fly-ruby/regional_database.rb', line 19

def self.replay_in_primary_region!(state:)
  res = Rack::Response.new(
    "",
    409,
    {"Fly-Replay" => "region=#{Fly.configuration.primary_region};state=#{state}"}
  )
  res.finish
end