class Sequel::SingleConnectionPool

This is the fastest connection pool, since it isn't a connection pool at all. It is just a wrapper around a single connection that uses the connection pool API.

Public Class Methods

new(db, opts=OPTS) click to toggle source
Calls superclass method Sequel::ConnectionPool.new
# File lib/sequel/connection_pool/single.rb, line 7
def initialize(db, opts=OPTS)
  super
  @conn = []
end

Public Instance Methods

all_connections() { |first| ... } click to toggle source

Yield the connection if one has been made.

# File lib/sequel/connection_pool/single.rb, line 13
def all_connections
  yield @conn.first if @conn
end
disconnect(opts=nil) click to toggle source

Disconnect the connection from the database.

# File lib/sequel/connection_pool/single.rb, line 18
def disconnect(opts=nil)
  return unless @conn
  disconnect_connection(@conn.first)
  @conn.clear
  nil
end
hold(server=nil) { |c| ... } click to toggle source

Yield the connection to the block.

# File lib/sequel/connection_pool/single.rb, line 26
def hold(server=nil)
  begin
    unless c = @conn.first
      @conn.replace([c = make_new(DEFAULT_SERVER)])
    end
    yield c
  rescue Sequel::DatabaseDisconnectError, *@error_classes => e
    disconnect if disconnect_error?(e)
    raise
  end
end
max_size() click to toggle source

The SingleConnectionPool always has a maximum size of 1.

# File lib/sequel/connection_pool/single.rb, line 39
def max_size
  1
end
pool_type() click to toggle source
# File lib/sequel/connection_pool/single.rb, line 43
def pool_type
  :single
end
size() click to toggle source

The SingleConnectionPool always has a size of 1 if connected and 0 if not.

# File lib/sequel/connection_pool/single.rb, line 49
def size
  @conn.empty? ? 0 : 1
end

Private Instance Methods

preconnect(concurrent = nil) click to toggle source

Make sure there is a valid connection.

# File lib/sequel/connection_pool/single.rb, line 56
def preconnect(concurrent = nil)
  hold{}
end