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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
// 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.pgm.init;
import com.google.common.base.MoreObjects;
import com.google.common.collect.ImmutableList;
import com.google.gerrit.extensions.annotations.PluginName;
import com.google.gerrit.pgm.init.api.ConsoleUI;
import com.google.gerrit.pgm.init.api.InitStep;
import com.google.gerrit.server.config.SitePaths;
import com.google.gerrit.server.plugins.JarPluginProvider;
import com.google.gerrit.server.plugins.PluginUtil;
import com.google.inject.AbstractModule;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Singleton;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.jar.Attributes;
import java.util.jar.JarFile;
@Singleton
public class InitPluginStepsLoader {
private final Path pluginsDir;
private final Injector initInjector;
final ConsoleUI ui;
@Inject
public InitPluginStepsLoader(final ConsoleUI ui, SitePaths sitePaths, Injector initInjector) {
this.pluginsDir = sitePaths.plugins_dir;
this.initInjector = initInjector;
this.ui = ui;
}
public Collection<InitStep> getInitSteps() {
List<Path> jars = scanJarsInPluginsDirectory();
ArrayList<InitStep> pluginsInitSteps = new ArrayList<>();
for (Path jar : jars) {
InitStep init = loadInitStep(jar);
if (init != null) {
pluginsInitSteps.add(init);
}
}
return pluginsInitSteps;
}
private InitStep loadInitStep(Path jar) {
try {
URLClassLoader pluginLoader =
URLClassLoader.newInstance(
new URL[] {jar.toUri().toURL()}, InitPluginStepsLoader.class.getClassLoader());
try (JarFile jarFile = new JarFile(jar.toFile())) {
Attributes jarFileAttributes = jarFile.getManifest().getMainAttributes();
String initClassName = jarFileAttributes.getValue("Gerrit-InitStep");
if (initClassName == null) {
return null;
}
@SuppressWarnings("unchecked")
Class<? extends InitStep> initStepClass =
(Class<? extends InitStep>) pluginLoader.loadClass(initClassName);
return getPluginInjector(jar).getInstance(initStepClass);
} catch (ClassCastException e) {
ui.message(
"WARN: InitStep from plugin %s does not implement %s (Exception: %s)\n",
jar.getFileName(), InitStep.class.getName(), e.getMessage());
return null;
} catch (NoClassDefFoundError e) {
ui.message(
"WARN: Failed to run InitStep from plugin %s (Missing class: %s)\n",
jar.getFileName(), e.getMessage());
return null;
}
} catch (Exception e) {
ui.message(
"WARN: Cannot load and get plugin init step for %s (Exception: %s)\n",
jar, e.getMessage());
return null;
}
}
private Injector getPluginInjector(Path jarPath) throws IOException {
final String pluginName =
MoreObjects.firstNonNull(
JarPluginProvider.getJarPluginName(jarPath), PluginUtil.nameOf(jarPath));
return initInjector.createChildInjector(
new AbstractModule() {
@Override
protected void configure() {
bind(String.class).annotatedWith(PluginName.class).toInstance(pluginName);
}
});
}
private List<Path> scanJarsInPluginsDirectory() {
try {
return PluginUtil.listPlugins(pluginsDir, ".jar");
} catch (IOException e) {
ui.message("WARN: Cannot list %s: %s", pluginsDir.toAbsolutePath(), e.getMessage());
return ImmutableList.of();
}
}
}
|
