org.apache.ignite.internal.processors.query.h2

Class ThreadLocalObjectPool<E extends AutoCloseable>

java.lang.Object

org.apache.ignite.internal.processors.query.h2.ThreadLocalObjectPool<E>

Type Parameters:

E - pooled objects type

public final class ThreadLocalObjectPool<E extends AutoCloseable>
extends Object

Special pool for managing limited number objects for further reuse. This pool maintains separate object bag for each thread by means of ThreadLocal.

If object is borrowed on one thread and recycled on different then it will be returned to recycling thread bag. For thread-safe use either pooled objects should be thread-safe or happens-before should be established between borrowing object and subsequent recycling.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	ThreadLocalObjectPool.Reusable Wrapper for a pooled object with capability to return the object to a pool.

Constructor Summary

Constructors

Constructor and Description
ThreadLocalObjectPool(int poolSize, Supplier<E> objFactory, Consumer<E> closer, Consumer<E> recycler)

Method Summary

Modifier and Type	Method and Description
ThreadLocalObjectPool.Reusable	borrow() Picks an object from the pool if one is present or creates new one otherwise.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ThreadLocalObjectPool

public ThreadLocalObjectPool(int poolSize,
                             Supplier<E> objFactory,
                             Consumer<E> closer,
                             Consumer<E> recycler)

Parameters:

poolSize - number of objects which pool can contain.

objFactory - factory used for new objects creation.

closer - close callback.

recycler - recycle callback.

Method Detail

borrow

public ThreadLocalObjectPool.Reusable borrow()

Picks an object from the pool if one is present or creates new one otherwise. Returns an object wrapper which could be returned to the pool.

Returns:

reusable object wrapper.