1 /*
2 * Copyright (C) 2016, Google Inc.
3 * and other copyright owners as documented in the project's IP log.
4 *
5 * This program and the accompanying materials are made available
6 * under the terms of the Eclipse Distribution License v1.0 which
7 * accompanies this distribution, is reproduced below, and is
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
9 *
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
25 * names of its contributors may be used to endorse or promote
26 * products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43 package org.eclipse.jgit.http.test;
44
45 import java.io.IOException;
46
47 import org.eclipse.jgit.internal.storage.dfs.DfsRepositoryDescription;
48 import org.eclipse.jgit.internal.storage.dfs.InMemoryRepository;
49 import org.eclipse.jgit.internal.storage.reftable.Reftable;
50 import org.eclipse.jgit.lib.RefDatabase;
51
52 /**
53 * An {@link InMemoryRepository} whose refs can be made unreadable for testing
54 * purposes.
55 */
56 class RefsUnreadableInMemoryRepository extends InMemoryRepository {
57
58 private final RefsUnreadableRefDatabase refs;
59
60 private volatile boolean failing;
61
62 RefsUnreadableInMemoryRepository(DfsRepositoryDescription repoDesc) {
63 super(repoDesc);
64 refs = new RefsUnreadableRefDatabase();
65 failing = false;
66 }
67
68 /** {@inheritDoc} */
69 @Override
70 public RefDatabase getRefDatabase() {
71 return refs;
72 }
73
74 /**
75 * Make the ref database unable to scan its refs.
76 * <p>
77 * It may be useful to follow a call to startFailing with a call to
78 * {@link RefDatabase#refresh()}, ensuring the next ref read fails.
79 */
80 void startFailing() {
81 failing = true;
82 }
83
84 private class RefsUnreadableRefDatabase extends MemRefDatabase {
85 @Override
86 protected Reftable reader() throws IOException {
87 if (failing) {
88 throw new IOException("disk failed, no refs found");
89 }
90 return super.reader();
91 }
92 }
93 }