| /* |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.hc.core5.pool; |
| |
| import java.util.concurrent.Future; |
| |
| import org.apache.hc.core5.concurrent.FutureCallback; |
| import org.apache.hc.core5.io.ModalCloseable; |
| import org.apache.hc.core5.util.Timeout; |
| |
| /** |
| * {@code ConnPool} represents a shared pool connections can be leased from |
| * and released back to. |
| * |
| * @param <T> the route type that represents the opposite endpoint of a pooled |
| * connection. |
| * @param <C> the type of pooled connections. |
| * @since 4.2 |
| */ |
| public interface ConnPool<T, C extends ModalCloseable> { |
| |
| /** |
| * Attempts to lease a connection for the given route and with the given |
| * state from the pool. |
| * <p> |
| * Please note the connection request can get automatically cancelled by the pool |
| * in case of a request timeout. |
| * |
| * @param route route of the connection. |
| * @param state arbitrary object that represents a particular state |
| * (usually a security principal or a unique token identifying |
| * the user whose credentials have been used while establishing the connection). |
| * May be {@code null}. |
| * @param requestTimeout request timeout. In case of a timeout the request |
| * can get automatically cancelled by the pool. |
| * @param callback operation completion callback. |
| * |
| * @return future for a leased pool entry. |
| */ |
| Future<PoolEntry<T, C>> lease(T route, Object state, Timeout requestTimeout, FutureCallback<PoolEntry<T, C>> callback); |
| |
| /** |
| * Releases the pool entry back to the pool. |
| * |
| * @param entry pool entry leased from the pool |
| * @param reusable flag indicating whether or not the released connection |
| * is in a consistent state and is safe for further use. |
| */ |
| void release(PoolEntry<T, C> entry, boolean reusable); |
| |
| } |