Class: RooOnRails::Rack::SafeTimeouts

Inherits:
Object
  • Object
show all
Defined in:
lib/roo_on_rails/rack/safe_timeouts.rb

Overview

Cleans up Rails database connections on timeouts, before they’re returned to the pool.

In particular, this clears the prepared statement cache, which can become corrupted as ActiveRecord isn’t interrupt-safe.

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ SafeTimeouts

Returns a new instance of SafeTimeouts.



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# File 'lib/roo_on_rails/rack/safe_timeouts.rb', line 15

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/roo_on_rails/rack/safe_timeouts.rb', line 19

def call(env)
  @app.call(env)
rescue ::Rack::Timeout::Error, ::Rack::Timeout::RequestTimeoutException
  Rails.logger.warn('Clearing ActiveRecord connection cache due to timeout')
  ActiveRecord::Base.connection.clear_cache!
  raise
end