opendaylight/config/config-persister-feature-adapter/src/main/java/org/opendaylight/controller/configpusherfeature/internal/ConfigPushingRunnable.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.configpusherfeature.internal;
   9
  10 import com.google.common.collect.LinkedHashMultimap;
  11
  12 import java.util.ArrayList;
  13 import java.util.List;
  14 import java.util.concurrent.BlockingQueue;
  15 import java.util.concurrent.TimeUnit;
  16
  17 import org.apache.karaf.features.Feature;
  18 import org.apache.karaf.features.FeatureEvent;
  19 import org.apache.karaf.features.FeatureEvent.EventType;
  20 import org.apache.karaf.features.FeaturesService;
  21 import org.opendaylight.controller.config.persist.api.ConfigPusher;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 public class ConfigPushingRunnable implements Runnable {
  26     private static final Logger LOG = LoggerFactory.getLogger(ConfigPushingRunnable.class);
  27     private static final int POLL_TIME = 1;
  28     private BlockingQueue<FeatureEvent> queue;
  29     private FeatureConfigPusher configPusher;
  30
  31     public ConfigPushingRunnable(final ConfigPusher configPusher, final FeaturesService featuresService,
  32                                  final BlockingQueue<FeatureEvent> featureEvents) {
  33         queue = featureEvents;
  34         this.configPusher = new FeatureConfigPusher(configPusher, featuresService);
  35     }
  36
  37     @Override
  38     @SuppressWarnings("IllegalCatch")
  39     public void run() {
  40         List<Feature> toInstall = new ArrayList<>();
  41         FeatureEvent event = null;
  42         boolean interrupted = false;
  43         while (true) {
  44             try {
  45                 if (!interrupted) {
  46                     if (toInstall.isEmpty()) {
  47                         event = queue.take();
  48                     } else {
  49                         event = queue.poll(POLL_TIME, TimeUnit.MILLISECONDS);
  50                     }
  51                     if (event != null && event.getFeature() != null) {
  52                         processFeatureEvent(event, toInstall);
  53                     }
  54                 } else if (toInstall.isEmpty()) {
  55                     LOG.error("ConfigPushingRunnable - exiting");
  56                     return;
  57                 }
  58             } catch (final InterruptedException e) {
  59                 LOG.error("ConfigPushingRunnable - interrupted");
  60                 interrupted = true;
  61             } catch (final Exception e) {
  62                 LOG.error("Exception while processing features {} event {}", toInstall, event, e);
  63             }
  64         }
  65     }
  66
  67     protected void processFeatureEvent(final FeatureEvent event, final List<Feature> toInstall) throws Exception {
  68         if (event.getType() == EventType.FeatureInstalled) {
  69             toInstall.add(event.getFeature());
  70             LinkedHashMultimap<Feature, FeatureConfigSnapshotHolder> result = configPusher.pushConfigs(toInstall);
  71             toInstall.removeAll(result.keySet());
  72         } else if (event.getType() == EventType.FeatureUninstalled) {
  73             toInstall.remove(event.getFeature());
  74         }
  75     }
  76
  77     protected void logPushResult(final LinkedHashMultimap<Feature, FeatureConfigSnapshotHolder> results) {
  78         for (Feature f : results.keySet()) {
  79             LOG.info("Pushed configs for feature {} {}", f, results.get(f));
  80         }
  81     }
  82 }