/*
* 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 com.facebook.presto.hive;
import com.google.common.collect.ImmutableClassToInstanceMap;
import org.apache.hadoop.conf.Configuration;
import javax.inject.Inject;
import java.net.URI;
import static com.facebook.presto.hive.util.ConfigurationUtils.copy;
import static java.util.Objects.requireNonNull;
public class HiveHdfsConfiguration
implements HdfsConfiguration
{
private static final Configuration INITIAL_CONFIGURATION;
static {
Configuration.addDefaultResource("hdfs-default.xml");
Configuration.addDefaultResource("hdfs-site.xml");
// must not be transitively reloaded during the future loading of various Hadoop modules
// all the required default resources must be declared above
INITIAL_CONFIGURATION = new Configuration(false);
Configuration defaultConfiguration = new Configuration();
copy(defaultConfiguration, INITIAL_CONFIGURATION);
}
@SuppressWarnings("ThreadLocalNotStaticFinal")
private final ThreadLocal<Configuration> hadoopConfiguration = new ThreadLocal<Configuration>()
{
@Override
protected Configuration initialValue()
{
PrestoHadoopConfiguration configuration = new PrestoHadoopConfiguration(ImmutableClassToInstanceMap.of());
copy(INITIAL_CONFIGURATION, configuration);
updater.updateConfiguration(configuration);
return configuration;
}
};
private final HdfsConfigurationUpdater updater;
@Inject
public HiveHdfsConfiguration(HdfsConfigurationUpdater updater)
{
this.updater = requireNonNull(updater, "updater is null");
}
@Override
public Configuration getConfiguration(URI uri)
{
// use the same configuration for everything
return hadoopConfiguration.get();
}
}