renderers/vpp/src/main/java/org/opendaylight/groupbasedpolicy/renderer/vpp/listener/VppEndpointListener.java

   1 /*
   2  * Copyright (c) 2016 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.groupbasedpolicy.renderer.vpp.listener;
  10
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.collect.HashBasedTable;
  13 import com.google.common.collect.Table;
  14 import com.google.common.eventbus.EventBus;
  15
  16 import javax.annotation.Nonnull;
  17
  18 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  19 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  20 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  21 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  22 import org.opendaylight.groupbasedpolicy.renderer.vpp.config.ConfigUtil;
  23 import org.opendaylight.groupbasedpolicy.renderer.vpp.event.VppEndpointConfEvent;
  24 import org.opendaylight.groupbasedpolicy.renderer.vpp.lisp.info.container.HostRelatedInfoContainer;
  25 import org.opendaylight.groupbasedpolicy.util.DataTreeChangeHandler;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.Config;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.config.VppEndpoint;
  28 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 public class VppEndpointListener extends DataTreeChangeHandler<VppEndpoint> {
  33
  34     private static final Logger LOG = LoggerFactory.getLogger(VppEndpointListener.class);
  35     private Table<String, String, VppEndpointConfEvent> pendingEndpointsTable = HashBasedTable.create();
  36     private EventBus eventBus;
  37
  38     public VppEndpointListener(DataBroker dataProvider, EventBus eventBus) {
  39         super(dataProvider);
  40         this.eventBus = Preconditions.checkNotNull(eventBus);
  41         registerDataTreeChangeListener(new DataTreeIdentifier<>(LogicalDatastoreType.CONFIGURATION,
  42                 InstanceIdentifier.builder(Config.class).child(VppEndpoint.class).build()));
  43     }
  44
  45     @Override
  46     protected void onWrite(DataObjectModification<VppEndpoint> rootNode,
  47             InstanceIdentifier<VppEndpoint> rootIdentifier) {
  48         VppEndpointConfEvent event =
  49                 new VppEndpointConfEvent(rootIdentifier, rootNode.getDataBefore(), rootNode.getDataAfter());
  50         LOG.debug("Dispatching event on write: {}", event.getClass());
  51         eventBus.post(event);
  52     }
  53
  54     @Override
  55     protected void onDelete(DataObjectModification<VppEndpoint> rootNode,
  56         InstanceIdentifier<VppEndpoint> rootIdentifier) {
  57         if (ConfigUtil.getInstance().isL3FlatEnabled()) {
  58             VppEndpoint vppEndpointBefore = rootNode.getDataBefore();
  59             Preconditions.checkNotNull(vppEndpointBefore, "VppEndpoint cannot be null on delete operation.");
  60             LOG.trace("onDelete -> Vppendpoint deleted: {}", vppEndpointBefore);
  61             Preconditions.checkArgument(vppEndpointBefore.getVppNodeId() != null);
  62             Preconditions.checkArgument(vppEndpointBefore.getVppInterfaceName() != null);
  63             String intfName = rootNode.getDataBefore().getVppInterfaceName();
  64             LOG.info("onDelete -> Checking pending endpoint to delete {}", pendingEndpointsTable.get(vppEndpointBefore.getVppNodeId().getValue(), intfName));
  65             if(!portIsBusy(rootNode.getDataBefore())) {
  66                 LOG.info("onDelete -> Endpoint is not busy, deleting {}", vppEndpointBefore);
  67                 deleteVppEndpoint(new VppEndpointConfEvent(rootIdentifier, rootNode.getDataBefore(), rootNode.getDataAfter()));
  68             }
  69             else {
  70                 LOG.info("onDelete -> Caching pending deleted endpoint {}", rootNode.getDataBefore());
  71                 pendingEndpointsTable.put(vppEndpointBefore.getVppNodeId().getValue(), intfName, new VppEndpointConfEvent(rootIdentifier, rootNode.getDataBefore(), rootNode.getDataAfter()));
  72             }
  73         } else {
  74             deleteVppEndpoint(new VppEndpointConfEvent(rootIdentifier, rootNode.getDataBefore(), rootNode.getDataAfter()));
  75         }
  76     }
  77
  78     private boolean portIsBusy(VppEndpoint vppEndpoint) {
  79         HostRelatedInfoContainer hrc = HostRelatedInfoContainer.getInstance();
  80         boolean intfcIsInUse =
  81                 hrc.intfcIsBusy(vppEndpoint.getVppNodeId().getValue(), vppEndpoint.getVppInterfaceName());
  82         LOG.trace("onDelete -> isPortInUse: {} for vppEp: {}", intfcIsInUse, vppEndpoint);
  83         return intfcIsInUse;
  84     }
  85
  86     private void deleteVppEndpoint(VppEndpointConfEvent vppEpConfEvent) {
  87         eventBus.post(vppEpConfEvent);
  88     }
  89
  90     public void flushPendingVppEndpoint(@Nonnull String hostName,@Nonnull String intfName) {
  91         Preconditions.checkNotNull(hostName);
  92         Preconditions.checkNotNull(intfName);
  93         LOG.trace("flushPendingVppEndpoint: hostname: {}, intfName: {}", hostName, intfName);
  94         VppEndpointConfEvent vppEndpointConfEvent = pendingEndpointsTable.get(hostName, intfName);
  95
  96         boolean canRemove = (vppEndpointConfEvent != null && !portIsBusy(vppEndpointConfEvent.getBefore().get()));
  97         LOG.trace("flushPendingVppEndpoint: can remove {} - > VppEp: {}", canRemove, vppEndpointConfEvent);
  98         if (canRemove) {
  99             LOG.trace("flushPendingVppEndpoint: hostName: {} for interface: {}", hostName, intfName);
 100             deleteVppEndpoint(vppEndpointConfEvent);
 101             pendingEndpointsTable.remove(hostName, intfName);
 102         }
 103     }
 104
 105     @Override
 106     protected void onSubtreeModified(DataObjectModification<VppEndpoint> rootNode,
 107             InstanceIdentifier<VppEndpoint> rootIdentifier) {
 108         VppEndpointConfEvent event =
 109                 new VppEndpointConfEvent(rootIdentifier, rootNode.getDataBefore(), rootNode.getDataAfter());
 110         LOG.debug("Dispatching event on subtree modified: {}", event.getClass());
 111         eventBus.post(event);
 112     }
 113
 114 }