/**
* 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.falcon.catalog;
import org.apache.falcon.FalconException;
import org.apache.falcon.util.ReflectionUtils;
import org.apache.falcon.util.StartupProperties;
/**
* Factory for providing appropriate catalog service
* implementation to the falcon service.
*/
@SuppressWarnings("unchecked")
public final class CatalogServiceFactory {
public static final String CATALOG_SERVICE = "catalog.service.impl";
private CatalogServiceFactory() {
}
public static boolean isEnabled() {
return StartupProperties.get().containsKey(CATALOG_SERVICE);
}
public static AbstractCatalogService getCatalogService() throws FalconException {
if (!isEnabled()) {
throw new FalconException(
"Catalog integration is not enabled in falcon. Implementation is missing: " + CATALOG_SERVICE);
}
return ReflectionUtils.getInstance(CATALOG_SERVICE);
}
}