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 217 217: def initialize(opts={}, &block) 218: @connection_proc = block 219: @disconnection_proc = opts[:disconnection_proc] 220: @conns = {} 221: @convert_exceptions = opts.include?(:pool_convert_exceptions) ? opts[:pool_convert_exceptions] : true 222: end
The connection for the given server.
# File lib/sequel/connection_pool.rb, line 225 225: def conn(server=:default) 226: @conns[server] 227: end
Disconnects from the database. Once a connection is requested using hold, the connection is reestablished.
# File lib/sequel/connection_pool.rb, line 248 248: def disconnect(&block) 249: block ||= @disconnection_proc 250: @conns.values.each{|conn| block.call(conn) if block} 251: @conns = {} 252: 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 231 231: def hold(server=:default) 232: begin 233: begin 234: yield(c = (@conns[server] ||= @connection_proc.call(server))) 235: rescue Sequel::DatabaseDisconnectError => dde 236: @conns.delete(server) 237: @disconnection_proc.call(c) if @disconnection_proc 238: raise 239: end 240: rescue Exception => e 241: # if the error is not a StandardError it is converted into RuntimeError. 242: raise(@convert_exceptions && !e.is_a?(StandardError) ? RuntimeError.new(e.message) : e) 243: end 244: end