Add support for reusable streaming
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / modification / MutableCompositeModification.java
index 9f37ba42d3c97076af0dfff3146c61338036968d..d4abc0452e34d845d2c763716e9c29a3b4662d9b 100644 (file)
  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
  * and is available at http://www.eclipse.org/legal/epl-v10.html
  */
-
 package org.opendaylight.controller.cluster.datastore.modification;
 
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
+import static com.google.common.base.Preconditions.checkArgument;
+import static java.util.Objects.requireNonNull;
 
-import java.io.Serializable;
+import java.io.IOException;
+import java.io.ObjectInput;
+import java.io.ObjectOutput;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import org.opendaylight.controller.cluster.datastore.DataStoreVersions;
+import org.opendaylight.controller.cluster.datastore.messages.VersionedExternalizableMessage;
+import org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeDataInput;
+import org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeDataOutput;
+import org.opendaylight.controller.cluster.datastore.node.utils.stream.NormalizedNodeInputOutput;
+import org.opendaylight.mdsal.dom.spi.store.DOMStoreWriteTransaction;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
+import org.opendaylight.yangtools.yang.data.impl.schema.ReusableImmutableNormalizedNodeStreamWriter;
 
 /**
- * MutableCompositeModification is just a mutable version of a
- * CompositeModification {@link org.opendaylight.controller.cluster.datastore.modification.MutableCompositeModification#addModification(Modification)}
+ * MutableCompositeModification is just a mutable version of a CompositeModification.
  */
-public class MutableCompositeModification
-    implements CompositeModification, Serializable {
-
-    private static final long serialVersionUID = 1163377899140186790L;
+public class MutableCompositeModification extends VersionedExternalizableMessage implements CompositeModification {
+    private static final long serialVersionUID = 1L;
 
     private final List<Modification> modifications = new ArrayList<>();
+    private List<Modification> immutableModifications = null;
+
+    public MutableCompositeModification() {
+        this(DataStoreVersions.CURRENT_VERSION);
+    }
+
+    public MutableCompositeModification(final short version) {
+        super(version);
+    }
+
+    @Override
+    public void apply(final DOMStoreWriteTransaction transaction) {
+        for (Modification modification : modifications) {
+            modification.apply(transaction);
+        }
+    }
 
     @Override
-    public void apply(DOMStoreWriteTransaction transaction) {
+    public void apply(final DataTreeModification transaction) {
         for (Modification modification : modifications) {
             modification.apply(transaction);
         }
     }
 
+    @Override
+    public byte getType() {
+        return COMPOSITE;
+    }
+
     /**
-     * Add a new Modification to the list of Modifications represented by this
-     * composite
+     * Add a new Modification to the list of Modifications represented by this composite.
      *
-     * @param modification
+     * @param modification the modification to add.
      */
-    public void addModification(Modification modification) {
-        modifications.add(modification);
+    public void addModification(final Modification modification) {
+        modifications.add(requireNonNull(modification));
     }
 
+    public void addModifications(final Iterable<Modification> newMods) {
+        for (Modification mod : newMods) {
+            addModification(mod);
+        }
+    }
+
+    @Override
     public List<Modification> getModifications() {
-        return Collections.unmodifiableList(modifications);
+        if (immutableModifications == null) {
+            immutableModifications = Collections.unmodifiableList(modifications);
+        }
+
+        return immutableModifications;
+    }
+
+    @Override
+    public void readExternal(final ObjectInput in) throws IOException, ClassNotFoundException {
+        super.readExternal(in);
+
+        int size = in.readInt();
+        if (size > 0) {
+            final NormalizedNodeDataInput input = NormalizedNodeInputOutput.newDataInputWithoutValidation(in);
+            final ReusableImmutableNormalizedNodeStreamWriter writer =
+                    ReusableImmutableNormalizedNodeStreamWriter.create();
+
+            for (int i = 0; i < size; i++) {
+                byte type = in.readByte();
+                switch (type) {
+                    case Modification.WRITE:
+                        modifications.add(WriteModification.fromStream(input, getVersion(), writer));
+                        break;
+
+                    case Modification.MERGE:
+                        modifications.add(MergeModification.fromStream(input, getVersion(), writer));
+                        break;
+
+                    case Modification.DELETE:
+                        modifications.add(DeleteModification.fromStream(input, getVersion()));
+                        break;
+                    default:
+                        break;
+                }
+            }
+        }
+    }
+
+    @Override
+    public void writeExternal(final ObjectOutput out) throws IOException {
+        super.writeExternal(out);
+
+        final int size = modifications.size();
+        out.writeInt(size);
+        if (size > 0) {
+            try (NormalizedNodeDataOutput stream = NormalizedNodeInputOutput.newDataOutput(out, getStreamVersion())) {
+                for (Modification mod : modifications) {
+                    out.writeByte(mod.getType());
+                    mod.writeTo(stream);
+                }
+            }
+        }
+    }
+
+    public static MutableCompositeModification fromSerializable(final Object serializable) {
+        checkArgument(serializable instanceof MutableCompositeModification);
+        return (MutableCompositeModification)serializable;
+    }
+
+    @Override
+    public void writeTo(final NormalizedNodeDataOutput out) throws IOException {
+        throw new UnsupportedOperationException();
     }
 }