/hudson-core/src/main/java/hudson/security/AuthenticationManagerProxy.java

 1/*
 2 * The MIT License
 3 * 
 4 * Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
 5 * 
 6 * Permission is hereby granted, free of charge, to any person obtaining a copy
 7 * of this software and associated documentation files (the "Software"), to deal
 8 * in the Software without restriction, including without limitation the rights
 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 * 
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 * 
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24package hudson.security;
25
26import org.acegisecurity.AuthenticationManager;
27import org.acegisecurity.Authentication;
28import org.acegisecurity.AuthenticationException;
29import org.acegisecurity.DisabledException;
30
31/**
32 * {@link AuthenticationManager} proxy that delegates to another instance.
33 *
34 * <p>
35 * This is used so that we can set up servlet filters first (which requires a reference
36 * to {@link AuthenticationManager}), then later change the actual authentication manager
37 * (and its set up) at runtime.
38 *
39 * @author Kohsuke Kawaguchi
40 */
41public class AuthenticationManagerProxy implements AuthenticationManager {
42    private volatile AuthenticationManager delegate;
43
44    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
45        AuthenticationManager m = delegate; // fix the reference we are working with
46
47        if(m ==null)
48            throw new DisabledException("Authentication service is still not ready yet");
49        else
50            return m.authenticate(authentication);
51    }
52
53    public void setDelegate(AuthenticationManager manager) {
54        this.delegate = manager;
55    }
56}