1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// Copyright (C) 2011 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.package com.google.gerrit.server.git;
package com.google.gerrit.server.git;
import com.google.gerrit.reviewdb.client.Project;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import java.util.Collection;
class TagSetHolder {
private final Object buildLock = new Object();
private final Project.NameKey projectName;
private volatile TagSet tags;
TagSetHolder(Project.NameKey projectName) {
this.projectName = projectName;
}
Project.NameKey getProjectName() {
return projectName;
}
TagSet getTagSet() {
return tags;
}
void setTagSet(TagSet tags) {
this.tags = tags;
}
TagMatcher matcher(Repository db, Collection<Ref> include) {
TagSet tags = this.tags;
if (tags == null) {
tags = build(db);
}
TagMatcher m = new TagMatcher(this, db, include, tags, false);
tags.prepare(m);
if (!m.newRefs.isEmpty() || !m.lostRefs.isEmpty()) {
tags = rebuild(db, tags, m);
m = new TagMatcher(this, db, include, tags, true);
tags.prepare(m);
}
return m;
}
void rebuildForNewTags(TagMatcher m) {
m.tags = rebuild(m.db, m.tags, null);
m.mask.clear();
m.newRefs.clear();
m.lostRefs.clear();
m.tags.prepare(m);
}
private TagSet build(Repository db) {
synchronized (buildLock) {
TagSet tags = this.tags;
if (tags == null) {
tags = new TagSet(projectName);
tags.build(db, null, null);
this.tags = tags;
}
return tags;
}
}
private TagSet rebuild(Repository db, TagSet old, TagMatcher m) {
synchronized (buildLock) {
TagSet cur = this.tags;
if (cur == old) {
cur = new TagSet(projectName);
cur.build(db, old, m);
this.tags = cur;
}
return cur;
}
}
}
|
