content: /**
   * 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 backtype.storm.scheduler.multitenant;
  
  import backtype.storm.Config;
  import backtype.storm.scheduler.Cluster;
  import backtype.storm.scheduler.IScheduler;
  import backtype.storm.scheduler.Topologies;
  import backtype.storm.scheduler.TopologyDetails;
  import com.alibaba.jstorm.utils.LoadConf;
  import java.util.HashMap;
  import java.util.Map;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class MultitenantScheduler implements IScheduler {
      private static final Logger LOG = LoggerFactory.getLogger(MultitenantScheduler.class);
      @SuppressWarnings("rawtypes")
      private Map _conf;
  
      @Override
      public void prepare(@SuppressWarnings("rawtypes") Map conf) {
          _conf = conf;
      }
  
      private Map<String, Number> getUserConf() {
          Map<String, Number> ret = (Map<String, Number>) _conf.get(Config.MULTITENANT_SCHEDULER_USER_POOLS);
          if (ret == null) {
              ret = new HashMap<>();
          } else {
              ret = new HashMap<>(ret);
          }
  
          Map fromFile = LoadConf.findAndReadYaml("multitenant-scheduler.yaml", false, false);
          Map<String, Number> tmp = (Map<String, Number>) fromFile.get(Config.MULTITENANT_SCHEDULER_USER_POOLS);
          if (tmp != null) {
              ret.putAll(tmp);
          }
          return ret;
      }
  
      @Override
      public void schedule(Topologies topologies, Cluster cluster) {
          LOG.debug("Rerunning scheduling...");
          Map<String, Node> nodeIdToNode = Node.getAllNodesFrom(cluster);
  
          Map<String, Number> userConf = getUserConf();
  
          Map<String, IsolatedPool> userPools = new HashMap<>();
          for (Map.Entry<String, Number> entry : userConf.entrySet()) {
              userPools.put(entry.getKey(), new IsolatedPool(entry.getValue().intValue()));
          }
          DefaultPool defaultPool = new DefaultPool();
          FreePool freePool = new FreePool();
  
          freePool.init(cluster, nodeIdToNode);
          for (IsolatedPool pool : userPools.values()) {
              pool.init(cluster, nodeIdToNode);
          }
          defaultPool.init(cluster, nodeIdToNode);
  
          for (TopologyDetails td : topologies.getTopologies()) {
              String user = (String) td.getConf().get(Config.TOPOLOGY_SUBMITTER_USER);
              LOG.debug("Found top {} run by user {}", td.getId(), user);
              NodePool pool = userPools.get(user);
              if (pool == null || !pool.canAdd(td)) {
                  pool = defaultPool;
              }
              pool.addTopology(td);
          }
  
          // Now schedule all of the topologies that need to be scheduled
          for (IsolatedPool pool : userPools.values()) {
              pool.scheduleAsNeeded(freePool, defaultPool);
          }
          defaultPool.scheduleAsNeeded(freePool);
          LOG.debug("Scheduling done...");
      }
  }
  