/**
* 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.hadoop.hbase.util;
import java.net.URL;
import java.net.URLClassLoader;
import com.google.common.base.Preconditions;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
/**
* Base class loader that defines couple shared constants used by sub-classes.
*/
@InterfaceAudience.Private
public class ClassLoaderBase extends URLClassLoader {
protected static final String DEFAULT_LOCAL_DIR = "/tmp/hbase-local-dir";
protected static final String LOCAL_DIR_KEY = "hbase.local.dir";
/**
* Parent class loader.
*/
protected final ClassLoader parent;
/**
* Creates a DynamicClassLoader that can load classes dynamically
* from jar files under a specific folder.
*
* @param parent the parent ClassLoader to set.
*/
public ClassLoaderBase(final ClassLoader parent) {
super(new URL[]{}, parent);
Preconditions.checkNotNull(parent, "No parent classloader!");
this.parent = parent;
}
}