View Javadoc
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  }