Class: NewRelic::Agent::Database::ConnectionManager

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/new_relic/agent/database.rb

Instance Method Summary collapse

Instance Method Details

#close_connections ⇒ Object

Closes all the connections in the internal connection cache



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# File 'lib/new_relic/agent/database.rb', line 155

def close_connections
  @connections ||= {}
  @connections.values.each do |connection|
    begin
      connection.disconnect!
    rescue
    end
  end

  @connections = {}
end

#get_connection(config) ⇒ Object

Returns a cached connection for a given ActiveRecord configuration - these are stored or reopened as needed, and if we cannot get one, we ignore it and move on without explaining the sql



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# File 'lib/new_relic/agent/database.rb', line 137

def get_connection(config)
  @connections ||= {}

  connection = @connections[config]

  return connection if connection

  begin
    connection = ActiveRecord::Base.send("#{config[:adapter]}_connection", config)
    @connections[config] = connection
  rescue => e
    NewRelic::Agent.agent.log.error("Caught exception #{e} trying to get connection to DB for explain. Control: #{config}")
    NewRelic::Agent.agent.log.error(e.backtrace.join("\n"))
    nil
  end
end