1 /*
2 * Copyright (C) 2015, Google Inc.
3 *
4 * This program and the accompanying materials are made available
5 * under the terms of the Eclipse Distribution License v1.0 which
6 * accompanies this distribution, is reproduced below, and is
7 * available at http://www.eclipse.org/org/documents/edl-v10.php
8 *
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials provided
21 * with the distribution.
22 *
23 * - Neither the name of the Eclipse Foundation, Inc. nor the
24 * names of its contributors may be used to endorse or promote
25 * products derived from this software without specific prior
26 * written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
29 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
30 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
31 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
33 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
36 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
37 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
38 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
40 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 */
42
43 package org.eclipse.jgit.transport;
44
45 import java.util.Collections;
46 import java.util.List;
47 import java.util.stream.Collectors;
48
49 import org.eclipse.jgit.storage.pack.PackStatistics;
50
51 /**
52 * {@link org.eclipse.jgit.transport.PostUploadHook} that delegates to a list of
53 * other hooks.
54 * <p>
55 * Hooks are run in the order passed to the constructor.
56 *
57 * @since 4.1
58 */
59 public class PostUploadHookChain implements PostUploadHook {
60 private final List<PostUploadHook> hooks;
61
62 /**
63 * Create a new hook chaining the given hooks together.
64 *
65 * @param hooks
66 * hooks to execute, in order.
67 * @return a new chain of the given hooks.
68 */
69 public static PostUploadHook newChain(List<PostUploadHook> hooks) {
70 List<PostUploadHook> newHooks = hooks.stream()
71 .filter(hook -> !hook.equals(PostUploadHook.NULL))
72 .collect(Collectors.toList());
73
74 if (newHooks.isEmpty()) {
75 return PostUploadHook.NULL;
76 } else if (newHooks.size() == 1) {
77 return newHooks.get(0);
78 } else {
79 return new PostUploadHookChain(newHooks);
80 }
81 }
82
83 /** {@inheritDoc} */
84 @Override
85 public void onPostUpload(PackStatistics stats) {
86 for (PostUploadHook hook : hooks) {
87 hook.onPostUpload(stats);
88 }
89 }
90
91 private PostUploadHookChain(List<PostUploadHook> hooks) {
92 this.hooks = Collections.unmodifiableList(hooks);
93 }
94 }