YarnResourceMgr.java

/*
 * 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.ranger.services.yarn.client;

import java.util.List;
import java.util.Map;

import org.apache.log4j.Logger;
import org.apache.ranger.plugin.service.ResourceLookupContext;

public class YarnResourceMgr {
	private static final 	Logger 	LOG 		= Logger.getLogger(YarnResourceMgr.class);
	private static final 	String  YARNQUEUE	= "queue";
	
	public static Map<String, Object> validateConfig(String serviceName, Map<String, String> configs) throws Exception {
		Map<String, Object> ret = null;
		
		if(LOG.isDebugEnabled()) {
			LOG.debug("==> YarnResourceMgr.validateConfig ServiceName: "+ serviceName + "Configs" + configs );
		}	
		
		try {
			ret = YarnClient.connectionTest(serviceName, configs);
		} catch (Exception e) {
			LOG.error("<== YarnResourceMgr.validateConfig Error: " + e);
		  throw e;
		}
		
		if(LOG.isDebugEnabled()) {
			LOG.debug("<== YarnResourceMgr.validateConfig Result : "+ ret  );
		}	
		return ret;
	}
	
    public static List<String> getYarnResources(String serviceName, Map<String, String> configs,ResourceLookupContext context) {
        String 		 userInput 				  = context.getUserInput();
		Map<String, List<String>> resourceMap = context.getResources();
	    List<String> 		resultList        = null;
		List<String> 		yarnQueueList 	  = null;
		String  			yarnQueueName     = null;
		
		if ( resourceMap != null && !resourceMap.isEmpty() &&
			resourceMap.get(YARNQUEUE) != null ) {
			yarnQueueName = userInput;
			yarnQueueList = resourceMap.get(YARNQUEUE);
		} else {
			yarnQueueName = userInput;
		}

        if (configs == null || configs.isEmpty()) {
                LOG.error("Connection Config is empty");
        } else {
               resultList = getYarnResource(serviceName, configs, yarnQueueName,yarnQueueList);
        }
        return resultList;
    }

    public static List<String> getYarnResource(String serviceName, Map<String, String> configs, String yarnQueueName, List<String> yarnQueueList) {
        final YarnClient yarnClient = YarnConnectionMgr.getYarnClient(serviceName, configs);
        List<String> topologyList = null;
	    if (yarnClient != null) {
	    	synchronized(yarnClient) {
	    		topologyList = yarnClient.getQueueList(yarnQueueName, yarnQueueList);
	    	}
	    }
        return topologyList;
    }

}