D-Net

package eu.dnetlib.functionality.modular.ui.workflows.values;

import com.google.common.base.Function;

import com.google.common.collect.Iterables;

import com.google.common.collect.Lists;

import eu.dnetlib.data.hadoop.rmi.HadoopService;

import eu.dnetlib.enabling.locators.UniqueServiceLocator;

import eu.dnetlib.msro.workflows.util.ValidNodeValuesFetcher;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import javax.annotation.Resource;

import java.util.List;

import java.util.Map;

public class ListHadoopClusters extends ValidNodeValuesFetcher {

	/**

	 * logger.

	 */

	private static final Log log = LogFactory.getLog(ListHadoopClusters.class);

	private final Function<String, DnetParamValue> f = new Function<String, DnetParamValue>() {

		@Override

		public DnetParamValue apply(final String s) {

			return new DnetParamValue(s, s);

		}

	};

	@Resource

	private UniqueServiceLocator serviceLocator;

	@Override

	protected List<DnetParamValue> obtainValues(final Map<String, String> params) throws Exception {

		List<DnetParamValue> res = Lists.newArrayList(Iterables.transform(listClusters(), f));

		return res;

	}

	private List<String> listClusters() {

		try {

			return serviceLocator.getService(HadoopService.class).listClusters();

		} catch (Throwable e) {

			log.error(e);

			return Lists.newArrayList();

		}

	}

}