Class | Sequel::SingleThreadedPool |
In: |
lib/sequel/connection_pool.rb
|
Parent: | Object |
A SingleThreadedPool acts as a replacement for a ConnectionPool for use in single-threaded applications. ConnectionPool imposes a substantial performance penalty, so SingleThreadedPool is used to gain some speed.
connection_proc | [W] | The proc used to create a new database connection |
disconnection_proc | [RW] | The proc used to disconnect a database connection. |
Initializes the instance with the supplied block as the connection_proc.
The single threaded pool takes the following options:
# File lib/sequel/connection_pool.rb, line 221 221: def initialize(opts={}, &block) 222: @connection_proc = block 223: @disconnection_proc = opts[:disconnection_proc] 224: @conns = {} 225: @convert_exceptions = opts.include?(:pool_convert_exceptions) ? opts[:pool_convert_exceptions] : true 226: end
The connection for the given server.
# File lib/sequel/connection_pool.rb, line 229 229: def conn(server=:default) 230: @conns[server] 231: end
Disconnects from the database. Once a connection is requested using hold, the connection is reestablished.
# File lib/sequel/connection_pool.rb, line 252 252: def disconnect(&block) 253: block ||= @disconnection_proc 254: @conns.values.each{|conn| block.call(conn) if block} 255: @conns = {} 256: end
Yields the connection to the supplied block for the given server. This method simulates the ConnectionPool#hold API.
# File lib/sequel/connection_pool.rb, line 235 235: def hold(server=:default) 236: begin 237: begin 238: yield(c = (@conns[server] ||= @connection_proc.call(server))) 239: rescue Sequel::DatabaseDisconnectError => dde 240: @conns.delete(server) 241: @disconnection_proc.call(c) if @disconnection_proc 242: raise 243: end 244: rescue Exception => e 245: # if the error is not a StandardError it is converted into RuntimeError. 246: raise(@convert_exceptions && !e.is_a?(StandardError) ? RuntimeError.new(e.message) : e) 247: end 248: end