SoftwareSyncupService.java

/***************************************************************************
 * Copyright (c) 2012-2014 VMware, Inc. All Rights Reserved.
 * 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.vmware.bdd.service.impl;

import java.util.Date;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;

import org.apache.log4j.Logger;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.vmware.bdd.entity.ClusterEntity;
import com.vmware.bdd.manager.SoftwareManagerCollector;
import com.vmware.bdd.manager.intf.IExclusiveLockedClusterEntityManager;
import com.vmware.bdd.manager.intf.ILockedClusterEntityManager;
import com.vmware.bdd.service.ISoftwareSyncUpService;
import com.vmware.bdd.software.mgmt.plugin.intf.SoftwareManager;
import com.vmware.bdd.software.mgmt.plugin.model.ClusterBlueprint;
import com.vmware.bdd.software.mgmt.plugin.monitor.ClusterReport;

@Service
public class SoftwareSyncupService implements ISoftwareSyncUpService,
      InitializingBean {
   private static final int SYNCUP_INTERVAL_MILLISECONDS = 300000; // every 5 minutes
   private static final Logger logger = Logger
         .getLogger(SoftwareSyncupService.class);
   private static final int MAX_QUEUE_SIZE = 1000;
   private static final String SERVICE_SYNCUP_THREAD_NAME = "ServiceSyncup";
   private SoftwareManagerCollector softwareManagerCollector;
   private IExclusiveLockedClusterEntityManager lockedEntityManager;
   private BlockingQueue<String> requestQueue = new ArrayBlockingQueue<String>(
         MAX_QUEUE_SIZE);
   private Timer syncupTimer;

   public SoftwareManagerCollector getSoftwareManagerCollector() {
      return softwareManagerCollector;
   }

   @Autowired
   public void setSoftwareManagerCollector(
         SoftwareManagerCollector softwareManagerCollector) {
      this.softwareManagerCollector = softwareManagerCollector;
   }

   public IExclusiveLockedClusterEntityManager getLockedEntityManager() {
      return lockedEntityManager;
   }

   @Autowired
   public void setLockedEntityManager(
         IExclusiveLockedClusterEntityManager lockedEntityManager) {
      this.lockedEntityManager = lockedEntityManager;
   }

   @Override
   public void afterPropertiesSet() throws Exception {
      List<ClusterEntity> clusters =
            lockedEntityManager.getClusterEntityMgr().findAllClusters();
      for (ClusterEntity cluster : clusters) {
         requestQueue.add(cluster.getName());
         logger.info("Start service sync up for cluster " + cluster.getName());
      }
      syncupTimer = new Timer(SERVICE_SYNCUP_THREAD_NAME, true);
      StatusSyncUpTask task =
            new StatusSyncUpTask(lockedEntityManager, softwareManagerCollector,
                  requestQueue);
      syncupTimer.scheduleAtFixedRate(task, new Date(), SYNCUP_INTERVAL_MILLISECONDS);
   }

   @Override
   public void syncUp(String clusterName) {
      requestQueue.add(clusterName);
   }

   @Override
   public void syncUpOnce(String clusterName) {
      // TODO Auto-generated method stub

   }

   private static class StatusSyncUpTask extends TimerTask {
      private ILockedClusterEntityManager lockedEntityManager;
      private SoftwareManagerCollector softwareManagerCollector;
      private BlockingQueue<String> requestQueue;

      public StatusSyncUpTask(ILockedClusterEntityManager lockedEntityManager,
            SoftwareManagerCollector softwareManagerCollector,
            BlockingQueue<String> requestQueue) {
         this.lockedEntityManager = lockedEntityManager;
         this.softwareManagerCollector = softwareManagerCollector;
         this.requestQueue = requestQueue;
      }

      @Override
      public void run() {
         // using set to remove duplicate
         Set<String> clusterList = new HashSet<String>();
         requestQueue.drainTo(clusterList);
         if (clusterList.isEmpty()) {
            logger.debug("No cluster need to be sync up for service status.");
            return;
         }

         for (Iterator<String> ite = clusterList.iterator(); ite.hasNext(); ) {
            String clusterName = ite.next();
            try {
               ClusterEntity cluster =
                     lockedEntityManager.getClusterEntityMgr().findByName(
                           clusterName);
               if (cluster == null) {
                  logger.info("Cluster " + clusterName
                        + " does not exist, stop sync up for it.");
                  ite.remove();
                  continue;
               }

               if (!cluster.getStatus().isSyncServiceStatus()) {
                  logger.debug("Cluster " + clusterName + " is in status "
                        + cluster.getStatus());
                  logger.debug("Stop sync up for it");
                  ite.remove();
                  continue;
               }
               ClusterBlueprint blueprint =
                     lockedEntityManager.getClusterEntityMgr()
                           .toClusterBluePrint(clusterName);
               SoftwareManager softMgr =
                     softwareManagerCollector
                           .getSoftwareManagerByClusterName(clusterName);
               if (softMgr == null) {
                  logger.error("No software manager for cluster " + clusterName
                        + " available.");
                  continue;
               }
               ClusterReport report = softMgr.queryClusterStatus(blueprint);
               if (report == null) {
                  logger.debug("No service status got from software manager, ignore it.");
                  continue;
               }
               logger.debug("Got cluster status: " + report.getStatus());
               lockedEntityManager.getClusterEntityMgr().setClusterStatus(
                     clusterName, report);
            } catch (Throwable e) {
               logger.error("Failed to syncup status for cluster "
                     + clusterName + ". Error message: " + e.getMessage(), e);
            }
         }
         //add back all clusters for next time sync up.
         requestQueue.addAll(clusterList);
         logger.debug("queued cluster names: " + requestQueue);
      }
   }
}