/**
* (c) Copyright 2013 WibiData, Inc.
*
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership.
*
* 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 org.kiji.mapreduce.platform;
import java.util.Map;
import org.kiji.annotations.ApiAudience;
import org.kiji.delegation.Priority;
/**
* Factory for CDH4-specific KijiMRPlatformBridge implementation.
*/
@ApiAudience.Private
public final class CDH4MR1KijiMRBridgeFactory extends KijiMRPlatformBridgeFactory {
/** {@inheritDoc} */
@Override
@SuppressWarnings("unchecked")
public KijiMRPlatformBridge getBridge() {
try {
Class<? extends KijiMRPlatformBridge> bridgeClass =
(Class<? extends KijiMRPlatformBridge>) Class.forName(
"org.kiji.mapreduce.platform.CDH4MR1KijiMRBridge");
return bridgeClass.newInstance();
} catch (Exception e) {
throw new RuntimeException("Could not instantiate platform bridge", e);
}
}
/** {@inheritDoc} */
@Override
public int getPriority(Map<String, String> runtimeHints) {
String hadoopVer = org.apache.hadoop.util.VersionInfo.getVersion();
if (hadoopVer.matches("2\\..*-cdh4\\..*")) {
// Hadoop 2.x-cdh4.* matches correctly; use this bridge.
return Priority.NORMAL;
} else {
// Can't provide for this implementation.
return Priority.DISABLED;
}
}
}