Class | Sequel::ConnectionPool |
In: |
lib/sequel/connection_pool.rb
|
Parent: | Object |
The base connection pool class, which all other connection pools are based on. This class is not instantiated directly, but subclasses should at the very least implement the following API:
initialize(Hash, &block) : | The block is used as the connection proc, which should accept a single symbol argument. |
hold(Symbol, &block) : | Yield a connection object (obtained from calling the block passed to initialize) to the current block. For sharded connection pools, the Symbol passed is the shard/server to use. |
disconnect(Symbol, &block) : | Disconnect the connection object. If a block is given, pass the connection option to it, otherwise use the :disconnection_proc option in the hash passed to initialize. For sharded connection pools, the Symbol passed is the shard/server to use. |
servers : | An array of shard/server symbols for all shards/servers that this connection pool recognizes. |
size : | an integer representing the total number of connections in the pool, or for the given shard/server if sharding is supported. |
For sharded connection pools, the sharded API adds the following methods:
add_servers(Array of Symbols) : | start recognizing all shards/servers specified by the array of symbols. |
specified by the array of symbols.
DEFAULT_SERVER | = | :default | The default server to use | |
CONNECTION_POOL_MAP | = | {[true, false] => :single, [true, true] => :sharded_single, [false, false] => :threaded, [false, true] => :sharded_threaded} | A map of [single threaded, sharded] values to symbols or ConnectionPool subclasses. |
Instantiates a connection pool with the given options. The block is called with a single symbol (specifying the server/shard to use) every time a new connection is needed. The following options are respected for all connection pools:
:after_connect : | The proc called after each new connection is made, with the connection object, useful for customizations that you want to apply to all connections. |
:disconnection_proc : | The proc called when removing connections from the pool, which is passed the connection to disconnect. |
# File lib/sequel/connection_pool.rb, line 70 70: def initialize(opts={}, &block) 71: raise(Sequel::Error, "No connection proc specified") unless @connection_proc = block 72: @disconnection_proc = opts[:disconnection_proc] 73: @after_connect = opts[:after_connect] 74: end