blob: 6f719361374ca0df0f3a67bcd8c9f5a50f359a9c (
plain)
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
95
96
97
98
99
100
101
|
// Copyright (C) 2012 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.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.gerrit.extensions.events.GitReferenceUpdatedListener;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.cache.CacheModule;
import com.google.gwtorm.server.SchemaFactory;
import com.google.inject.Inject;
import com.google.inject.Module;
import com.google.inject.Singleton;
import com.google.inject.TypeLiteral;
import com.google.inject.name.Named;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ExecutionException;
@Singleton
public class ChangeCache implements GitReferenceUpdatedListener {
private static final Logger log =
LoggerFactory.getLogger(ChangeCache.class);
private static final String ID_CACHE = "changes";
public static Module module() {
return new CacheModule() {
@Override
protected void configure() {
cache(ID_CACHE,
Project.NameKey.class,
new TypeLiteral<List<Change>>() {})
.maximumWeight(0)
.loader(Loader.class);
}
};
}
private final LoadingCache<Project.NameKey, List<Change>> cache;
@Inject
ChangeCache(@Named(ID_CACHE) LoadingCache<Project.NameKey, List<Change>> cache) {
this.cache = cache;
}
List<Change> get(Project.NameKey name) {
try {
return cache.get(name);
} catch (ExecutionException e) {
log.warn("Cannot fetch changes for " + name, e);
return Collections.emptyList();
}
}
@Override
public void onGitReferenceUpdated(GitReferenceUpdatedListener.Event event) {
for (GitReferenceUpdatedListener.Update u : event.getUpdates()) {
if (u.getRefName().startsWith("refs/changes/")) {
cache.invalidate(new Project.NameKey(event.getProjectName()));
break;
}
}
}
static class Loader extends CacheLoader<Project.NameKey, List<Change>> {
private final SchemaFactory<ReviewDb> schema;
@Inject
Loader(SchemaFactory<ReviewDb> schema) {
this.schema = schema;
}
@Override
public List<Change> load(Project.NameKey key) throws Exception {
final ReviewDb db = schema.open();
try {
return Collections.unmodifiableList(db.changes().byProject(key).toList());
} finally {
db.close();
}
}
}
}
|
