Package org.springframework.integration.util

Interface SimplePool.PoolItemCallback<T>

Type Parameters:
T - pool item type.
Enclosing class:
SimplePool<T>
public static interface SimplePool.PoolItemCallback<T>
User of the pool provide an implementation of this interface; called during various pool operations.

  • Method Summary

    Modifier and Type Method Description
    T createForPool()
    Called by the pool when a new instance is required to populate the pool.
    boolean isStale​(T item)
    Called by the pool when an idle item is retrieved from the pool.
    void removedFromPool​(T item)
    Called by the pool when an item is forcibly removed from the pool - for example when the pool size is reduced.

  • Method Details

    • createForPool

      T createForPool()
      Called by the pool when a new instance is required to populate the pool. Only called if no idle non-stale instances are available.
      Returns:
      The item.

    • isStale

      boolean isStale​(T item)
      Called by the pool when an idle item is retrieved from the pool. Indicates whether that item is usable, or should be discarded. The pool takes no further action on a stale item, discards it, and attempts to find or create another item.
      Parameters:
      item - The item.
      Returns:
      true if the item should not be used.

    • removedFromPool

      void removedFromPool​(T item)
      Called by the pool when an item is forcibly removed from the pool - for example when the pool size is reduced. The implementation should perform any cleanup necessary on the item, such as closing connections etc.
      Parameters:
      item - The item.