--- !ruby/object:RI::ClassDescription 
attributes: 
- !ruby/object:RI::Attribute 
  comment: 
  name: spec
  rw: R
class_methods: 
- !ruby/object:RI::MethodSummary 
  name: new
comment: 
- !ruby/struct:SM::Flow::P 
  body: Connection pool base class for managing ActiveRecord database connections.
- !ruby/struct:SM::Flow::H 
  level: 2
  text: Introduction
- !ruby/struct:SM::Flow::P 
  body: "A connection pool synchronizes thread access to a limited number of database connections. The basic idea is that each thread checks out a database connection from the pool, uses that connection, and checks the connection back in. ConnectionPool is completely thread-safe, and will ensure that a connection cannot be used by two threads at the same time, as long as ConnectionPool's contract is correctly followed. It will also handle cases in which there are more threads than connections: if all connections have been checked out, and a thread tries to checkout a connection anyway, then ConnectionPool will wait until some other thread has checked in a connection."
- !ruby/struct:SM::Flow::H 
  level: 2
  text: Obtaining (checking out) a connection
- !ruby/struct:SM::Flow::P 
  body: "Connections can be obtained and used from a connection pool in several ways:"
- !ruby/object:SM::Flow::LIST 
  contents: 
  - !ruby/struct:SM::Flow::LI 
    label: "1."
    body: Simply use ActiveRecord::Base.connection as with ActiveRecord 2.1 and earlier (pre-connection-pooling). Eventually, when you're done with the connection(s) and wish it to be returned to the pool, you call ActiveRecord::Base.clear_active_connections!. This will be the default behavior for ActiveRecord when used in conjunction with ActionPack's request handling cycle.
  - !ruby/struct:SM::Flow::LI 
    label: "2."
    body: Manually check out a connection from the pool with ActiveRecord::Base.connection_pool.checkout. You are responsible for returning this connection to the pool when finished by calling ActiveRecord::Base.connection_pool.checkin(connection).
  - !ruby/struct:SM::Flow::LI 
    label: "3."
    body: Use ActiveRecord::Base.connection_pool.with_connection(&amp;block), which obtains a connection, yields it as the sole argument to the block, and returns it to the pool after the block completes.
  type: :NUMBER
- !ruby/struct:SM::Flow::P 
  body: Connections in the pool are actually AbstractAdapter objects (or objects compatible with AbstractAdapter's interface).
- !ruby/struct:SM::Flow::H 
  level: 2
  text: Options
- !ruby/struct:SM::Flow::P 
  body: "There are two connection-pooling-related options that you can add to your database connection configuration:"
- !ruby/object:SM::Flow::LIST 
  contents: 
  - !ruby/struct:SM::Flow::LI 
    label: "*"
    body: "<tt>pool</tt>: number indicating size of connection pool (default 5)"
  - !ruby/struct:SM::Flow::LI 
    label: "*"
    body: "<tt>wait_timeout</tt>: number of seconds to block and wait for a connection before giving up and raising a timeout error (default 5 seconds)."
  type: :BULLET
constants: []

full_name: ActiveRecord::ConnectionAdapters::ConnectionPool
includes: []

instance_methods: 
- !ruby/object:RI::MethodSummary 
  name: checkin
- !ruby/object:RI::MethodSummary 
  name: checkout
- !ruby/object:RI::MethodSummary 
  name: clear_reloadable_connections!
- !ruby/object:RI::MethodSummary 
  name: clear_stale_cached_connections!
- !ruby/object:RI::MethodSummary 
  name: connected?
- !ruby/object:RI::MethodSummary 
  name: connection
- !ruby/object:RI::MethodSummary 
  name: disconnect!
- !ruby/object:RI::MethodSummary 
  name: release_connection
- !ruby/object:RI::MethodSummary 
  name: with_connection
name: ConnectionPool
superclass: Object
