| package backtype.storm.utils; |
| |
| import java.util.concurrent.ConcurrentLinkedQueue; |
| |
| |
| public class ThreadResourceManager<T> { |
| public static interface ResourceFactory<X> { |
| X makeResource(); |
| } |
| |
| ResourceFactory<T> _factory; |
| ConcurrentLinkedQueue<T> _resources = new ConcurrentLinkedQueue<T>(); |
| |
| public ThreadResourceManager(ResourceFactory<T> factory) { |
| _factory = factory; |
| } |
| |
| public T acquire() { |
| T ret = _resources.poll(); |
| if(ret==null) { |
| ret = _factory.makeResource(); |
| } |
| return ret; |
| } |
| |
| public void release(T resource) { |
| _resources.add(resource); |
| } |
| } |