opendaylight/md-sal/sal-clustering-commons/src/main/java/org/opendaylight/controller/cluster/common/actor/MeteredBoundedMailbox.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
   9 package org.opendaylight.controller.cluster.common.actor;
  10
  11 import akka.actor.ActorRef;
  12 import akka.actor.ActorSystem;
  13 import akka.dispatch.BoundedDequeBasedMailbox;
  14 import akka.dispatch.MailboxType;
  15 import akka.dispatch.ProducesMessageQueue;
  16 import com.codahale.metrics.Gauge;
  17 import com.codahale.metrics.Metric;
  18 import com.codahale.metrics.MetricRegistry;
  19 import com.typesafe.config.Config;
  20 import org.opendaylight.controller.cluster.reporting.MetricsReporter;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23 import scala.concurrent.duration.FiniteDuration;
  24
  25 public class MeteredBoundedMailbox implements MailboxType,
  26         ProducesMessageQueue<MeteredBoundedMailbox.MeteredMessageQueue> {
  27     private static final Logger LOG = LoggerFactory.getLogger(MeteredBoundedMailbox.class);
  28     private static final String QUEUE_SIZE = "q-size";
  29
  30     private final Integer capacity;
  31     private final FiniteDuration pushTimeOut;
  32
  33     public MeteredBoundedMailbox(ActorSystem.Settings settings, Config config) {
  34
  35         CommonConfig commonConfig = new CommonConfig(settings.config());
  36         this.capacity = commonConfig.getMailBoxCapacity();
  37         this.pushTimeOut = commonConfig.getMailBoxPushTimeout();
  38     }
  39
  40
  41     @Override
  42     public MeteredMessageQueue create(final scala.Option<ActorRef> owner, scala.Option<ActorSystem> system) {
  43         final MeteredMessageQueue queue = new MeteredMessageQueue(this.capacity, this.pushTimeOut);
  44         monitorQueueSize(owner, queue);
  45         return queue;
  46     }
  47
  48     private void monitorQueueSize(scala.Option<ActorRef> owner, final MeteredMessageQueue monitoredQueue) {
  49         registerMetric(owner, QUEUE_SIZE, getQueueSizeGuage(monitoredQueue));
  50     }
  51
  52     private static Gauge<Integer> getQueueSizeGuage(final MeteredMessageQueue monitoredQueue) {
  53         return monitoredQueue::size;
  54     }
  55
  56     static <T extends Metric> void registerMetric(scala.Option<ActorRef> owner, String metricName, T metric) {
  57         if (owner.isEmpty()) {
  58            // there's no actor to monitor
  59             return;
  60         }
  61
  62         String actorName = owner.get().path().toStringWithoutAddress();
  63         String fullName = MetricRegistry.name(actorName, metricName);
  64
  65         MetricRegistry registry = MetricsReporter.getInstance(MeteringBehavior.DOMAIN).getMetricsRegistry();
  66
  67         if (registry.getMetrics().containsKey(fullName)) {
  68             // already registered
  69             return;
  70         }
  71
  72         try {
  73             registry.register(fullName, metric);
  74         } catch (IllegalArgumentException e) {
  75             // already registered - shouldn't happen here since we check above...
  76             LOG.debug("Unable to register '{}' in metrics registry: {}", e);
  77         }
  78     }
  79
  80     public static class MeteredMessageQueue extends BoundedDequeBasedMailbox.MessageQueue {
  81         private static final long serialVersionUID = 1L;
  82
  83         public MeteredMessageQueue(int capacity, FiniteDuration pushTimeOut) {
  84             super(capacity, pushTimeOut);
  85         }
  86     }
  87 }
  88