opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/modification/MutableCompositeModification.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.datastore.modification;
  10
  11 import java.io.IOException;
  12 import java.io.ObjectInput;
  13 import java.io.ObjectOutput;
  14 import java.util.ArrayList;
  15 import java.util.List;
  16 import org.opendaylight.controller.cluster.datastore.DataStoreVersions;
  17 import org.opendaylight.controller.cluster.datastore.messages.VersionedExternalizableMessage;
  18 import org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputOutput;
  19 import org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputStreamReader;
  20 import org.opendaylight.controller.cluster.datastore.utils.SerializationUtils;
  21 import org.opendaylight.controller.protobuff.messages.persistent.PersistentMessages;
  22 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  23 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  24
  25 /**
  26  * MutableCompositeModification is just a mutable version of a
  27  * CompositeModification {@link org.opendaylight.controller.cluster.datastore.modification.MutableCompositeModification#addModification(Modification)}
  28  */
  29 public class MutableCompositeModification extends VersionedExternalizableMessage implements CompositeModification {
  30     private static final long serialVersionUID = 1L;
  31
  32     private final List<Modification> modifications = new ArrayList<>();
  33
  34     public MutableCompositeModification() {
  35         this(DataStoreVersions.CURRENT_VERSION);
  36     }
  37
  38     public MutableCompositeModification(short version) {
  39         super(version);
  40     }
  41
  42     @Override
  43     public void apply(DOMStoreWriteTransaction transaction) {
  44         for (Modification modification : modifications) {
  45             modification.apply(transaction);
  46         }
  47     }
  48
  49     @Override
  50     public void apply(DataTreeModification transaction) {
  51         for (Modification modification : modifications) {
  52             modification.apply(transaction);
  53         }
  54     }
  55
  56     @Override
  57     public byte getType() {
  58         return COMPOSITE;
  59     }
  60
  61     /**
  62      * Add a new Modification to the list of Modifications represented by this
  63      * composite
  64      *
  65      * @param modification
  66      */
  67     public void addModification(Modification modification) {
  68         modifications.add(modification);
  69     }
  70
  71     @Override
  72     public List<Modification> getModifications() {
  73         return modifications;
  74     }
  75
  76     @Override
  77     public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
  78         super.readExternal(in);
  79
  80         int size = in.readInt();
  81
  82         if(size > 1) {
  83             SerializationUtils.REUSABLE_READER_TL.set(new NormalizedNodeInputStreamReader(in));
  84         }
  85
  86         try {
  87             for(int i = 0; i < size; i++) {
  88                 byte type = in.readByte();
  89                 switch(type) {
  90                 case Modification.WRITE:
  91                     modifications.add(WriteModification.fromStream(in, getVersion()));
  92                     break;
  93
  94                 case Modification.MERGE:
  95                     modifications.add(MergeModification.fromStream(in, getVersion()));
  96                     break;
  97
  98                 case Modification.DELETE:
  99                     modifications.add(DeleteModification.fromStream(in, getVersion()));
 100                     break;
 101                 }
 102             }
 103         } finally {
 104             SerializationUtils.REUSABLE_READER_TL.remove();
 105         }
 106     }
 107
 108     @Override
 109     public void writeExternal(ObjectOutput out) throws IOException {
 110         super.writeExternal(out);
 111
 112         out.writeInt(modifications.size());
 113
 114         if(modifications.size() > 1) {
 115             SerializationUtils.REUSABLE_WRITER_TL.set(NormalizedNodeInputOutput.newDataOutput(out));
 116         }
 117
 118         try {
 119             for(Modification mod: modifications) {
 120                 out.writeByte(mod.getType());
 121                 mod.writeExternal(out);
 122             }
 123         } finally {
 124             SerializationUtils.REUSABLE_WRITER_TL.remove();
 125         }
 126     }
 127
 128     @Override
 129     @Deprecated
 130     protected Object newLegacySerializedInstance() {
 131         if(getVersion() >= DataStoreVersions.LITHIUM_VERSION) {
 132             return this;
 133         } else {
 134             PersistentMessages.CompositeModification.Builder builder =
 135                     PersistentMessages.CompositeModification.newBuilder();
 136
 137             builder.setTimeStamp(System.nanoTime());
 138
 139             for (Modification m : modifications) {
 140                 builder.addModification((PersistentMessages.Modification) m.toSerializable());
 141             }
 142
 143             return builder.build();
 144         }
 145     }
 146
 147     public static MutableCompositeModification fromSerializable(Object serializable) {
 148         if(serializable instanceof MutableCompositeModification) {
 149             return (MutableCompositeModification)serializable;
 150         } else {
 151             return fromLegacySerializable(serializable);
 152         }
 153     }
 154
 155     @Deprecated
 156     private static MutableCompositeModification fromLegacySerializable(Object serializable) {
 157         PersistentMessages.CompositeModification o = (PersistentMessages.CompositeModification) serializable;
 158         MutableCompositeModification compositeModification = new MutableCompositeModification();
 159
 160         for(PersistentMessages.Modification m : o.getModificationList()){
 161             if(m.getType().equals(DeleteModification.class.toString())){
 162                 compositeModification.addModification(DeleteModification.fromSerializable(m));
 163             } else if(m.getType().equals(WriteModification.class.toString())){
 164                 compositeModification.addModification(WriteModification.fromSerializable(m));
 165             } else if(m.getType().equals(MergeModification.class.toString())){
 166                 compositeModification.addModification(MergeModification.fromSerializable(m));
 167             }
 168         }
 169
 170         return compositeModification;
 171     }
 172 }