Add SecureStore implementation

Right now it is not used, only just hook into build system

Change-Id: Ibbb15ad2aad3e77aa64f738bc3bc0a1177e61a26
Signed-off-by: Dariusz Luksza <dariusz@luksza.org

gerrit-common/BUCK

@@ -7,6 +7,7 @@ ANNOTATIONS = [
 ]
 
 EXCLUDES = [
+  SRC + 'common/PluginData.java',
   SRC + 'common/FileUtil.java',
 ]
 
@@ -45,6 +46,7 @@ java_library(
     '//gerrit-reviewdb:server',
     '//lib:gwtjsonrpc',
     '//lib:gwtorm',
+    '//lib:guava',
     '//lib/jgit:jgit',
   ],
   visibility = ['PUBLIC'],

gerrit-common/src/main/java/com/google/gerrit/common/PluginData.java

@@ -0,0 +1,46 @@
+// Copyright (C) 2013 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.common;
+
+package com.google.gerrit.common;
+
+import com.google.common.base.Objects;
+
+import java.io.File;
+
+public class PluginData {
+  public final String name;
+  public final String version;
+  public final File pluginFile;
+
+  public PluginData(String name, String version, File pluginFile) {
+    this.name = name;
+    this.version = version;
+    this.pluginFile = pluginFile;
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (obj instanceof PluginData) {
+      PluginData o = (PluginData) obj;
+      return Objects.equal(name, o.name) && Objects.equal(version, o.version)
+          && Objects.equal(pluginFile, o.pluginFile);
+    }
+    return super.equals(obj);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hashCode(name, version, pluginFile);
+  }
+}

gerrit-server/src/main/java/com/google/gerrit/server/plugins/JarScanner.java

@@ -38,10 +38,12 @@ import org.objectweb.asm.MethodVisitor;
 import org.objectweb.asm.Opcodes;
 import org.objectweb.asm.Type;
 
+import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.lang.annotation.Annotation;
 import java.util.Collection;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.Enumeration;
 import java.util.Map;
@@ -92,6 +94,15 @@ public class JarScanner {
     }
   }
 
+  public static Iterable<ExtensionMetaData> scan(File file, String pluginName,
+      Class<? extends Annotation> annotation) throws InvalidPluginException,
+      IOException {
+    Map<Class<? extends Annotation>, Iterable<ExtensionMetaData>> result =
+        scan(new JarFile(file), pluginName,
+            Arrays.<Class<? extends Annotation>> asList(annotation));
+    return result.get(annotation);
+  }
+
   public static Map<Class<? extends Annotation>, Iterable<ExtensionMetaData>> scan(
       JarFile jarFile, String pluginName,
       Iterable<Class<? extends Annotation>> annotations)

gerrit-server/src/main/java/com/google/gerrit/server/plugins/PluginLoader.java

@@ -77,6 +77,10 @@ public class PluginLoader implements LifecycleListener {
   static final String PLUGIN_TMP_PREFIX = "plugin_";
   static final Logger log = LoggerFactory.getLogger(PluginLoader.class);
 
+  public static String getPluginName(File srcFile) throws IOException {
+    return Objects.firstNonNull(getGerritPluginName(srcFile), nameOf(srcFile)).toLowerCase();
+  }
+
   private final File pluginsDir;
   private final File dataDir;
   private final File tmpDir;
@@ -661,7 +665,7 @@ public class PluginLoader implements LifecycleListener {
   // If multiple plugin files provide the same plugin name, then only
   // the first plugin remains active and all other plugins with the same
   // name are disabled.
-  private static Multimap<String, File> prunePlugins(File pluginsDir) {
+  public static Multimap<String, File> prunePlugins(File pluginsDir) {
     List<File> jars = scanJarsInPluginsDirectory(pluginsDir);
     Multimap<String, File> map;
     try {
@@ -757,8 +761,7 @@ public class PluginLoader implements LifecycleListener {
       throws IOException {
     Multimap<String, File> map = LinkedHashMultimap.create();
     for (File srcFile : plugins) {
-      map.put(Objects.firstNonNull(getGerritPluginName(srcFile),
-          nameOf(srcFile)), srcFile);
+      map.put(getPluginName(srcFile), srcFile);
     }
     return map;
   }

gerrit-server/src/main/java/com/google/gerrit/server/securestore/SecureStore.java

@@ -0,0 +1,27 @@
+// Copyright (C) 2013 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.securestore;
+
+import com.google.gerrit.extensions.annotations.ExtensionPoint;
+
+@ExtensionPoint
+public interface SecureStore {
+
+  String get(String section, String subsection, String name);
+
+  void set(String section, String subsection, String name, String value);
+
+  void unset(String section, String subsection, String name);
+}

gerrit-server/src/main/java/com/google/gerrit/server/securestore/SecureStoreData.java

@@ -0,0 +1,77 @@
+// Copyright (C) 2014 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.securestore;
+
+import com.google.common.base.Objects;
+
+import java.io.File;
+import java.net.URL;
+import java.net.URLClassLoader;
+
+public class SecureStoreData {
+  public final File pluginFile;
+  public final String storeName;
+  public final String className;
+
+  public SecureStoreData(String pluginName, String className, File jarFile,
+      String storeName) {
+    this.className = className;
+    this.pluginFile = jarFile;
+    this.storeName = String.format("%s/%s", pluginName, storeName);
+  }
+
+  public String getStoreName() {
+    return storeName;
+  }
+
+  public Class<? extends SecureStore> load() {
+    return load(pluginFile);
+  }
+
+  @SuppressWarnings("unchecked")
+  public Class<? extends SecureStore> load(File pluginFile) {
+    try {
+      URL[] pluginJarUrls = new URL[] {pluginFile.toURI().toURL()};
+      ClassLoader currentCL = Thread.currentThread().getContextClassLoader();
+      final URLClassLoader newClassLoader =
+          new URLClassLoader(pluginJarUrls, currentCL);
+      Thread.currentThread().setContextClassLoader(newClassLoader);
+      return (Class<? extends SecureStore>) newClassLoader.loadClass(className);
+    } catch (Exception e) {
+      throw new SecureStoreException(String.format(
+          "Cannot load secure store implementation for %s", storeName), e);
+    }
+  }
+
+  @Override
+  public String toString() {
+    return Objects.toStringHelper(this).add("storeName", storeName)
+        .add("className", className).add("file", pluginFile).toString();
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (obj instanceof SecureStoreData) {
+      SecureStoreData o = (SecureStoreData) obj;
+      return storeName.equals(o.storeName);
+    }
+    return false;
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hashCode(storeName);
+  }
+}

gerrit-server/src/main/java/com/google/gerrit/server/securestore/SecureStoreException.java

@@ -0,0 +1,27 @@
+// Copyright (C) 2013 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.securestore;
+
+public class SecureStoreException extends RuntimeException {
+  private static final long serialVersionUID = 5581700510568485065L;
+
+  SecureStoreException(String msg) {
+    super(msg);
+  }
+
+  SecureStoreException(String msg, Exception e) {
+    super(msg, e);
+  }
+}