1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package org.apache.http.conn;
29
30 import java.util.concurrent.ExecutionException;
31 import java.util.concurrent.TimeUnit;
32
33 import org.apache.http.HttpClientConnection;
34 import org.apache.http.concurrent.Cancellable;
35
36 /**
37 * Represents a request for a {@link HttpClientConnection} whose life cycle
38 * is managed by a connection manager.
39 *
40 * @since 4.3
41 */
42 public interface ConnectionRequest extends Cancellable {
43
44 /**
45 * Obtains a connection within a given time.
46 * This method will block until a connection becomes available,
47 * the timeout expires, or the connection manager is shut down.
48 * Timeouts are handled with millisecond precision.
49 *
50 * If {@link #cancel()} is called while this is blocking or
51 * before this began, an {@link InterruptedException} will
52 * be thrown.
53 *
54 * @param timeout the timeout, 0 or negative for no timeout
55 * @param timeUnit the unit for the {@code timeout},
56 * may be {@code null} only if there is no timeout
57 *
58 * @return a connection that can be used to communicate
59 * along the given route
60 *
61 * @throws ConnectionPoolTimeoutException
62 * in case of a timeout
63 * @throws InterruptedException
64 * if the calling thread is interrupted while waiting
65 */
66 HttpClientConnection get(long timeout, TimeUnit timeUnit)
67 throws InterruptedException, ExecutionException, ConnectionPoolTimeoutException;
68
69 }