org.apache.synapse.securevault.secret.SecretCallbackHandlerFactory Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.synapse.securevault.secret;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.securevault.SecureVaultException;
import org.apache.synapse.securevault.commons.MiscellaneousUtil;
import java.util.Properties;
/**
* Contains factory methods to create SecretCallbackHandler
*/
public class SecretCallbackHandlerFactory {
private static final Log log = LogFactory.getLog(SecretCallbackHandlerFactory.class);
/**
* Creates a SecretCallbackHandler instance based on given properties
* At future , can extend this , if SecretCallbackHandler instance need
* some data in the initialization
*
* @param properties properties contains some information about how to create a SecretCallbackHandler
* @param key use for getting related properties out of all properties
* @return SecretCallbackHandler instance
*/
public static SecretCallbackHandler createSecretCallbackHandler(Properties properties,
String key) {
String provider = MiscellaneousUtil.getProperty(properties, key, null);
return createSecretCallbackHandler(provider);
}
/**
* Creates a SecretCallbackHandler instance based on provided class
*
* @param provider provider class name
* @return SecretCallbackHandler instance
*/
public static SecretCallbackHandler createSecretCallbackHandler(String provider) {
if (provider != null && !"".equals(provider)) {
try {
Class aClass = Thread.currentThread().getContextClassLoader().loadClass(provider);
Object instance = aClass.newInstance();
if (instance != null && instance instanceof SecretCallbackHandler) {
return (SecretCallbackHandler) instance;
} else {
handleException("Invalid class as SecretCallbackHandler : Class Name : " +
provider);
}
} catch (ClassNotFoundException e) {
handleException("A SecretCallbackHandler cannot be found for class name : " +
provider, e);
} catch (IllegalAccessException e) {
handleException("Error creating a instance from class : " + provider, e);
} catch (InstantiationException e) {
handleException("Error creating a instance from class : " + provider, e);
}
}
return null;
}
/**
* Helper methods for handle errors.
*
* @param msg The error message
* @param e Thorwen Exception
*/
private static void handleException(String msg, Exception e) {
log.error(msg, e);
throw new SecureVaultException(msg, e);
}
/**
* Helper methods for handle errors.
*
* @param msg The error message
*/
private static void handleException(String msg) {
log.error(msg);
throw new SecureVaultException(msg);
}
}