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/*
* Copyright 2014 gitblit.com.
*
* 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.gitblit.guice;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.gitblit.IStoredSettings;
import com.gitblit.Keys;
import com.gitblit.manager.IRuntimeManager;
import com.gitblit.transport.ssh.FileKeyManager;
import com.gitblit.transport.ssh.IPublicKeyManager;
import com.gitblit.transport.ssh.NullKeyManager;
import com.gitblit.utils.StringUtils;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
/**
* Provides a lazily-instantiated IPublicKeyManager configured from IStoredSettings.
*
* @author James Moger
*
*/
@Singleton
public class IPublicKeyManagerProvider implements Provider<IPublicKeyManager> {
private final Logger logger = LoggerFactory.getLogger(getClass());
private final IRuntimeManager runtimeManager;
private volatile IPublicKeyManager manager;
@Inject
public IPublicKeyManagerProvider(IRuntimeManager runtimeManager) {
this.runtimeManager = runtimeManager;
}
@Override
public synchronized IPublicKeyManager get() {
if (manager != null) {
return manager;
}
IStoredSettings settings = runtimeManager.getSettings();
String clazz = settings.getString(Keys.git.sshKeysManager, FileKeyManager.class.getName());
if (StringUtils.isEmpty(clazz)) {
clazz = FileKeyManager.class.getName();
}
try {
Class<? extends IPublicKeyManager> mgrClass = (Class<? extends IPublicKeyManager>) Class.forName(clazz);
manager = runtimeManager.getInjector().getInstance(mgrClass);
} catch (Exception e) {
logger.error("failed to create public key manager", e);
manager = new NullKeyManager();
}
return manager;
}
}
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