Class: Sequel::SingleConnectionPool

Inherits:
ConnectionPool show all
Defined in:
lib/sequel/connection_pool/single.rb

Overview

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.

Constant Summary

Constants inherited from ConnectionPool

ConnectionPool::CONNECTION_POOL_MAP, ConnectionPool::DEFAULT_SERVER, ConnectionPool::OPTS

Instance Attribute Summary

Attributes inherited from ConnectionPool

#after_connect, #db

Instance Method Summary collapse

Methods inherited from ConnectionPool

#created_count, #initialize, #servers

Methods included from ConnectionPool::ClassMethods

#get_pool

Constructor Details

This class inherits a constructor from Sequel::ConnectionPool

Instance Method Details

#all_connections {|@conn| ... } ⇒ Object

Yield the connection if one has been made.

Yields:

  • (@conn) 


8
9
10
 
# File 'lib/sequel/connection_pool/single.rb', line 8

def all_connections
  yield @conn if @conn
end

#disconnect(opts = nil) ⇒ Object

Disconnect the connection from the database.



13
14
15
16
17
 
# File 'lib/sequel/connection_pool/single.rb', line 13

def disconnect(opts=nil)
  return unless @conn
  db.disconnect_connection(@conn)
  @conn = nil
end

#hold(server = nil) ⇒ Object

Yield the connection to the block.



20
21
22
23
24
25
26
27
 
# File 'lib/sequel/connection_pool/single.rb', line 20

def hold(server=nil)
  begin
    yield(@conn ||= make_new(DEFAULT_SERVER))
  rescue Sequel::DatabaseDisconnectError
    disconnect
    raise
  end
end

#max_size ⇒ Object

The SingleConnectionPool always has a maximum size of 1.



30
31
32
 
# File 'lib/sequel/connection_pool/single.rb', line 30

def max_size
  1
end

#pool_type ⇒ Object 



34
35
36
 
# File 'lib/sequel/connection_pool/single.rb', line 34

def pool_type
  :single
end

#size ⇒ Object

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



40
41
42
 
# File 'lib/sequel/connection_pool/single.rb', line 40

def size
  @conn ? 1 : 0
end