opendaylight/md-sal/forwardingrules-manager/src/main/java/org/opendaylight/controller/frm/impl/AbstractListeningCommiter.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.frm.impl;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Preconditions;
  12 import org.opendaylight.controller.frm.ForwardingRulesCommiter;
  13 import org.opendaylight.controller.frm.ForwardingRulesManager;
  14 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  16 import org.opendaylight.yangtools.yang.binding.DataObject;
  17 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  18
  19 import java.util.Collections;
  20 import java.util.Map;
  21 import java.util.Set;
  22
  23 /**
  24  * AbstractChangeListner implemented basic {@link AsyncDataChangeEvent} processing for
  25  * flow node subDataObject (flows, groups and meters).
  26  *
  27  * @author <a href="mailto:vdemcak@cisco.com">Vaclav Demcak</a>
  28  *
  29  */
  30 public abstract class AbstractListeningCommiter <T extends DataObject> implements ForwardingRulesCommiter<T> {
  31
  32     protected ForwardingRulesManager provider;
  33
  34     protected final Class<T> clazz;
  35
  36     public AbstractListeningCommiter (ForwardingRulesManager provider, Class<T> clazz) {
  37         this.provider = Preconditions.checkNotNull(provider, "ForwardingRulesManager can not be null!");
  38         this.clazz = Preconditions.checkNotNull(clazz, "Class can not be null!");
  39     }
  40
  41     @Override
  42     public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changeEvent) {
  43         Preconditions.checkNotNull(changeEvent,"Async ChangeEvent can not be null!");
  44
  45         /* All DataObjects for create */
  46         final Map<InstanceIdentifier<?>, DataObject> createdData = changeEvent.getCreatedData() != null
  47                 ? changeEvent.getCreatedData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
  48         /* All DataObjects for remove */
  49         final Set<InstanceIdentifier<?>> removeData = changeEvent.getRemovedPaths() != null
  50                 ? changeEvent.getRemovedPaths() : Collections.<InstanceIdentifier<?>> emptySet();
  51         /* All DataObjects for updates */
  52         final Map<InstanceIdentifier<?>, DataObject> updateData = changeEvent.getUpdatedData() != null
  53                 ? changeEvent.getUpdatedData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
  54         /* All Original DataObjects */
  55         final Map<InstanceIdentifier<?>, DataObject> originalData = changeEvent.getOriginalData() != null
  56                 ? changeEvent.getOriginalData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
  57
  58         this.createData(createdData);
  59         this.updateData(updateData, originalData);
  60         this.removeData(removeData, originalData);
  61     }
  62
  63     /**
  64      * Method return wildCardPath for Listener registration
  65      * and for identify the correct KeyInstanceIdentifier from data;
  66      */
  67     protected abstract InstanceIdentifier<T> getWildCardPath();
  68
  69
  70
  71     @SuppressWarnings("unchecked")
  72     private void createData(final Map<InstanceIdentifier<?>, DataObject> createdData) {
  73         final Set<InstanceIdentifier<?>> keys = createdData.keySet() != null
  74                 ? createdData.keySet() : Collections.<InstanceIdentifier<?>> emptySet();
  75         for (InstanceIdentifier<?> key : keys) {
  76             if (clazz.equals(key.getTargetType())) {
  77                 final InstanceIdentifier<FlowCapableNode> nodeIdent =
  78                         key.firstIdentifierOf(FlowCapableNode.class);
  79                 if (preConfigurationCheck(nodeIdent)) {
  80                     InstanceIdentifier<T> createKeyIdent = key.firstIdentifierOf(clazz);
  81                     final Optional<DataObject> value = Optional.of(createdData.get(key));
  82                     if (value.isPresent()) {
  83                         this.add(createKeyIdent, (T)value.get(), nodeIdent);
  84                     }
  85                 }
  86             }
  87         }
  88     }
  89
  90     @SuppressWarnings("unchecked")
  91     private void updateData(final Map<InstanceIdentifier<?>, DataObject> updateData,
  92             final Map<InstanceIdentifier<?>, DataObject> originalData) {
  93
  94         final Set<InstanceIdentifier<?>> keys = updateData.keySet() != null
  95                 ? updateData.keySet() : Collections.<InstanceIdentifier<?>> emptySet();
  96         for (InstanceIdentifier<?> key : keys) {
  97             if (clazz.equals(key.getTargetType())) {
  98                 final InstanceIdentifier<FlowCapableNode> nodeIdent =
  99                         key.firstIdentifierOf(FlowCapableNode.class);
 100                 if (preConfigurationCheck(nodeIdent)) {
 101                     InstanceIdentifier<T> updateKeyIdent = key.firstIdentifierOf(clazz);
 102                     final Optional<DataObject> value = Optional.of(updateData.get(key));
 103                     final Optional<DataObject> original = Optional.of(originalData.get(key));
 104                     if (value.isPresent() && original.isPresent()) {
 105                         this.update(updateKeyIdent, (T)original.get(), (T)value.get(), nodeIdent);
 106                     }
 107                 }
 108             }
 109         }
 110     }
 111
 112     @SuppressWarnings("unchecked")
 113     private void removeData(final Set<InstanceIdentifier<?>> removeData,
 114             final Map<InstanceIdentifier<?>, DataObject> originalData) {
 115
 116         for (InstanceIdentifier<?> key : removeData) {
 117             if (clazz.equals(key.getTargetType())) {
 118                 final InstanceIdentifier<FlowCapableNode> nodeIdent =
 119                         key.firstIdentifierOf(FlowCapableNode.class);
 120                 if (preConfigurationCheck(nodeIdent)) {
 121                     final InstanceIdentifier<T> ident = key.firstIdentifierOf(clazz);
 122                     final DataObject removeValue = originalData.get(key);
 123                     this.remove(ident, (T)removeValue, nodeIdent);
 124                 }
 125             }
 126         }
 127     }
 128
 129     private boolean preConfigurationCheck(final InstanceIdentifier<FlowCapableNode> nodeIdent) {
 130         Preconditions.checkNotNull(nodeIdent, "FlowCapableNode ident can not be null!");
 131         return provider.isNodeActive(nodeIdent);
 132     }
 133 }
 134