1 /* 2 * Copyright 2016 The gRPC Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package io.grpc.internal; 18 19 /** 20 * An ObjectPool backed by a {@link SharedResourceHolder.Resource}. 21 */ 22 public final class SharedResourcePool<T> implements ObjectPool<T> { 23 private final SharedResourceHolder.Resource<T> resource; 24 SharedResourcePool(SharedResourceHolder.Resource<T> resource)25 private SharedResourcePool(SharedResourceHolder.Resource<T> resource) { 26 this.resource = resource; 27 } 28 forResource(SharedResourceHolder.Resource<T> resource)29 public static <T> SharedResourcePool<T> forResource(SharedResourceHolder.Resource<T> resource) { 30 return new SharedResourcePool<T>(resource); 31 } 32 33 @Override getObject()34 public T getObject() { 35 return SharedResourceHolder.get(resource); 36 } 37 38 @Override 39 @SuppressWarnings("unchecked") returnObject(Object object)40 public T returnObject(Object object) { 41 SharedResourceHolder.release(resource, (T) object); 42 return null; 43 } 44 } 45