qosservice/impl/src/main/java/org/opendaylight/netvirt/qosservice/QosAlertPortData.java

   1 /*
   2  * Copyright (c) 2017 Ericsson India Global Services Pvt Ltd. 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.netvirt.qosservice;
  10
  11 import java.math.BigInteger;
  12 import java.util.function.Supplier;
  13 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.ports.rev150712.ports.attributes.ports.Port;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.qos.rev160613.qos.attributes.qos.policies.QosPolicy;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.node.connector.statistics.and.port.number.map.NodeConnectorStatisticsAndPortNumberMap;
  16 import org.slf4j.Logger;
  17 import org.slf4j.LoggerFactory;
  18
  19 /**
  20  * This class is ThreadSafe.
  21  */
  22 public class QosAlertPortData {
  23     private static final Logger LOG = LoggerFactory.getLogger(QosAlertPortData.class);
  24     private static final BigInteger BIG_HUNDRED = new BigInteger("100");
  25
  26     private final Port port;
  27     private final QosNeutronUtils qosNeutronUtils;
  28     private final Supplier<BigInteger> alertThreshold;
  29     private volatile BigInteger rxPackets;
  30     private volatile BigInteger rxDroppedPackets;
  31     private volatile boolean statsDataInit;
  32
  33     public QosAlertPortData(final Port port, final QosNeutronUtils qosNeutronUtils,
  34             final Supplier<BigInteger> alertThreshold) {
  35         this.port = port;
  36         this.qosNeutronUtils = qosNeutronUtils;
  37         this.alertThreshold = alertThreshold;
  38     }
  39
  40     public void initPortData() {
  41         LOG.trace("Port {} data initialized", port.getUuid().getValue());
  42         statsDataInit = false;
  43     }
  44
  45     public void updatePortStatistics(NodeConnectorStatisticsAndPortNumberMap statsData) {
  46         LOG.trace("Port {} rx-packets {} tx-packets {} rx-dropped {} tx-dropped {}", port.getUuid().getValue(),
  47                            statsData.getPackets().getReceived(), statsData.getPackets().getTransmitted(),
  48                            statsData.getReceiveDrops(), statsData.getTransmitDrops());
  49         if (statsDataInit) {
  50             calculateAlertCondition(statsData);
  51         } else {
  52             statsDataInit = true;
  53         }
  54         rxPackets = statsData.getPackets().getReceived();
  55         rxDroppedPackets = statsData.getReceiveDrops();
  56     }
  57
  58     private void calculateAlertCondition(NodeConnectorStatisticsAndPortNumberMap statsData)  {
  59         BigInteger rxDiff = statsData.getPackets().getReceived().subtract(rxPackets);
  60         BigInteger rxDroppedDiff = statsData.getReceiveDrops().subtract(rxDroppedPackets);
  61
  62         if ((rxDiff.signum() < 0) || (rxDroppedDiff.signum() < 0)) {
  63             LOG.debug("Port {} counters reset", port.getUuid().getValue());
  64             initPortData(); // counters wrapped. wait for one more poll.
  65             return;
  66         }
  67         BigInteger rxTotalDiff = rxDiff.add(rxDroppedDiff);
  68         LOG.trace("Port {} rxDiff:{} rxDropped diff:{} total diff:{}", port.getUuid().getValue(), rxDiff,
  69                                                                             rxDroppedDiff, rxTotalDiff);
  70         QosPolicy qosPolicy = qosNeutronUtils.getQosPolicy(port);
  71
  72         if (qosPolicy == null) {
  73             return;
  74         }
  75
  76         if (rxDroppedDiff.multiply(BIG_HUNDRED).compareTo(rxTotalDiff.multiply(alertThreshold.get())) > 0) {
  77             LOG.trace(QosConstants.ALERT_MSG_FORMAT, qosPolicy.getName(), qosPolicy.getUuid().getValue(),
  78                     port.getUuid().getValue(), port.getNetworkId().getValue(), statsData.getPackets().getReceived(),
  79                                                                                         statsData.getReceiveDrops());
  80
  81             QosAlertGenerator.raiseAlert(qosPolicy.getName(), qosPolicy.getUuid().getValue(),
  82                     port.getUuid().getValue(), port.getNetworkId().getValue(), statsData.getPackets().getReceived(),
  83                                                                                           statsData.getReceiveDrops());
  84         }
  85
  86     }
  87 }