Class: MultiThink::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/multithink/connection.rb

Constant Summary collapse

DEFAULTS = 
{retries: 10}

Instance Method Summary collapse

Constructor Details

#initialize(servers, options = {}) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/multithink/connection.rb', line 11

def initialize(servers, options = {})
  @servers = servers
  options = DEFAULTS.merge(options)
  @retries = options.fetch(:retries)
  connect
end

Instance Method Details

#connect ⇒ Object 



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# File 'lib/multithink/connection.rb', line 18

def connect
  # TODO try all servers until we get a connection
  options = @servers.first
  begin
    @conn = r.connect(options)
  rescue
    @tried ||= 0
    sleep 1
    retry if (@tried += 1) < @retries
  end
end

#reconnect ⇒ Object 



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# File 'lib/multithink/connection.rb', line 39

def reconnect
  begin
    # try fast path first
    @conn.reconnect
  rescue
    # if that fails then try get a new connection
    connect
  end
end

#run(query) ⇒ Object 



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# File 'lib/multithink/connection.rb', line 30

def run(query)
  # TODO handle connection failure
  begin
    query.run(@conn)
  rescue RuntimeError => e
    reconnect
  end
end