storage/src/main/java/org/apache/crail/storage/StorageTier.java

/*
 *
 * 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.crail.storage;

import org.apache.crail.storage.StorageClient;

public interface StorageTier extends StorageClient {
	
	public abstract StorageServer launchServer() throws Exception;
	
	@SuppressWarnings("unchecked")
	public static StorageTier createInstance(String name) throws Exception {
		Class<?> nodeClass = Class.forName(name);
		if (StorageTier.class.isAssignableFrom(nodeClass)){
			Class<? extends StorageTier> storageTier = (Class<? extends StorageTier>) nodeClass;
			StorageTier tier = storageTier.newInstance();
			return tier;
		} else {
			throw new Exception("Cannot instantiate datanode of type " + name);
		}
	}	
}