Saturday, October 21, 2017

Object pooling made simple using Apache Commons Pool2

If you are looking for a quick implementation of an object pool, then look no further than the excellent Apache Commons Pool2 implementation. Pool2 is far better and faster than the original commons pool library.

Object pool can be used to cache those objects that are expensive to setup and cannot be created for every request or thread - e.g. DB connections, MQTT broker connections, AMQP broker connections, etc. 

The following code snippets would show you how simple it is to create a pool for your 'expensive-to-create' objects. 
Any object pool typically requires 2 parameters  [GenericObjectPool.java] --- 
1) A factory object to handle creation and destruction of your objects [MyObjectFactory.java]
2) A configuration object to configure your pool. [GenericObjectPoolConfig,java]