1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.eclipse.aether.transport.apache;
20
21 import java.util.LinkedList;
22
23 import org.apache.http.auth.AuthScheme;
24 import org.apache.http.client.config.AuthSchemes;
25 import org.apache.http.impl.auth.BasicScheme;
26
27 /**
28 * Pool of (equivalent) auth schemes for a single host.
29 */
30 final class AuthSchemePool {
31
32 private final LinkedList<AuthScheme> authSchemes;
33
34 private String schemeName;
35
36 AuthSchemePool() {
37 authSchemes = new LinkedList<>();
38 }
39
40 public synchronized AuthScheme get() {
41 AuthScheme authScheme = null;
42 if (!authSchemes.isEmpty()) {
43 authScheme = authSchemes.removeLast();
44 } else if (AuthSchemes.BASIC.equalsIgnoreCase(schemeName)) {
45 authScheme = new BasicScheme();
46 }
47 return authScheme;
48 }
49
50 public synchronized void put(AuthScheme authScheme) {
51 if (authScheme == null) {
52 return;
53 }
54 if (!authScheme.getSchemeName().equals(schemeName)) {
55 schemeName = authScheme.getSchemeName();
56 authSchemes.clear();
57 }
58 authSchemes.add(authScheme);
59 }
60 }