applications/forwardingrules-sync/src/main/java/org/opendaylight/openflowplugin/applications/frsync/impl/SimplifiedConfigListener.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.openflowplugin.applications.frsync.impl;
  10
  11 import com.google.common.base.Optional;
  12 import com.google.common.util.concurrent.ListenableFuture;
  13 import java.util.Collection;
  14 import javax.annotation.Nonnull;
  15 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  16 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  17 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  18 import org.opendaylight.openflowplugin.applications.frsync.SyncReactor;
  19 import org.opendaylight.openflowplugin.applications.frsync.dao.FlowCapableNodeDao;
  20 import org.opendaylight.openflowplugin.applications.frsync.dao.FlowCapableNodeSnapshotDao;
  21 import org.opendaylight.openflowplugin.applications.frsync.util.PathUtil;
  22 import org.opendaylight.openflowplugin.applications.frsync.util.SyncupEntry;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 /**
  30  * Listens to config changes and delegates sync entry to {@link SyncReactor}.
  31  */
  32 public class SimplifiedConfigListener extends AbstractFrmSyncListener<FlowCapableNode> {
  33
  34     private static final Logger LOG = LoggerFactory.getLogger(SimplifiedConfigListener.class);
  35     private final SyncReactor reactor;
  36     private final FlowCapableNodeSnapshotDao configSnapshot;
  37     private final FlowCapableNodeDao operationalDao;
  38
  39     public SimplifiedConfigListener(final SyncReactor reactor,
  40                                     final FlowCapableNodeSnapshotDao configSnapshot,
  41                                     final FlowCapableNodeDao operationalDao) {
  42         this.reactor = reactor;
  43         this.configSnapshot = configSnapshot;
  44         this.operationalDao = operationalDao;
  45     }
  46
  47     @Override
  48     public void onDataTreeChanged(@Nonnull final Collection<DataTreeModification<FlowCapableNode>> modifications) {
  49         super.onDataTreeChanged(modifications);
  50     }
  51
  52     /**
  53      * Update cache. If operational data are present, choose appropriate data and start syncup.
  54      * Otherwise skip incoming change.
  55      */
  56     @Override
  57     protected Optional<ListenableFuture<Boolean>> processNodeModification(
  58             final DataTreeModification<FlowCapableNode> modification) {
  59         final InstanceIdentifier<FlowCapableNode> nodePath = modification.getRootPath().getRootIdentifier();
  60         final NodeId nodeId = PathUtil.digNodeId(nodePath);
  61
  62         configSnapshot.updateCache(nodeId, Optional.fromNullable(modification.getRootNode().getDataAfter()));
  63
  64         final Optional<FlowCapableNode> operationalNode = operationalDao.loadByNodeId(nodeId);
  65         if (!operationalNode.isPresent()) {
  66             LOG.debug("Skip syncup, {} operational is not present", nodeId.getValue());
  67             return Optional.absent();
  68         }
  69
  70         final DataObjectModification<FlowCapableNode> configModification = modification.getRootNode();
  71         final FlowCapableNode dataBefore = configModification.getDataBefore();
  72         final FlowCapableNode dataAfter = configModification.getDataAfter();
  73         final ListenableFuture<Boolean> endResult;
  74         if (dataBefore == null && dataAfter != null) {
  75             endResult = onNodeAdded(nodePath, dataAfter, operationalNode.get());
  76         } else if (dataBefore != null && dataAfter == null) {
  77             endResult = onNodeDeleted(nodePath, dataBefore);
  78         } else {
  79             endResult = onNodeUpdated(nodePath, dataBefore, dataAfter);
  80         }
  81
  82         return Optional.of(endResult);
  83     }
  84
  85     /**
  86      * If node was added to config DS and it is already present in operational DS (connected) diff between current
  87      * new configuration and actual configuration (seen in operational) should be calculated and sent to device.
  88      */
  89     private ListenableFuture<Boolean> onNodeAdded(final InstanceIdentifier<FlowCapableNode> nodePath,
  90                                                   final FlowCapableNode dataAfter,
  91                                                   final FlowCapableNode operationalNode) {
  92         LOG.debug("Reconciliation {}: {}", dsType(), PathUtil.digNodeId(nodePath).getValue());
  93         final SyncupEntry syncupEntry = new SyncupEntry(dataAfter, dsType(), operationalNode,
  94                 LogicalDatastoreType.OPERATIONAL);
  95         return reactor.syncup(nodePath, syncupEntry);
  96     }
  97
  98     /**
  99      * Apply minimal changes very fast. For better performance needed just compare config
 100      * after+before. Config listener should not be dependent on operational flows/groups/meters while
 101      * updating config because operational store is highly async and it depends on another module in
 102      * system which is updating operational store (that components is also trying to solve
 103      * scale/performance issues on several layers).
 104      */
 105     private ListenableFuture<Boolean> onNodeUpdated(final InstanceIdentifier<FlowCapableNode> nodePath,
 106                                                     final FlowCapableNode dataBefore,
 107                                                     final FlowCapableNode dataAfter) {
 108         final SyncupEntry syncupEntry = new SyncupEntry(dataAfter, dsType(), dataBefore, dsType());
 109         return reactor.syncup(nodePath, syncupEntry);
 110     }
 111
 112     /**
 113      * Remove values that are being deleted in the config from the switch.
 114      * Note, this could be probably optimized using dedicated wipe-out RPC.
 115      */
 116     private ListenableFuture<Boolean> onNodeDeleted(final InstanceIdentifier<FlowCapableNode> nodePath,
 117                                                     final FlowCapableNode dataBefore) {
 118         final SyncupEntry syncupEntry = new SyncupEntry(null, dsType(), dataBefore, dsType());
 119         return reactor.syncup(nodePath, syncupEntry);
 120     }
 121
 122     @Override
 123     public LogicalDatastoreType dsType() {
 124         return LogicalDatastoreType.CONFIGURATION;
 125     }
 126 }