Add signature marker and version to NormalizedNode streaming

[controller.git] / opendaylight / md-sal / sal-clustering-commons / src / main / java / org / opendaylight / controller / cluster / datastore / node / utils / stream / NormalizedNodeOutputStreamWriter.java

diff --git a/opendaylight/md-sal/sal-clustering-commons/src/main/java/org/opendaylight/controller/cluster/datastore/node/utils/stream/NormalizedNodeOutputStreamWriter.java b/opendaylight/md-sal/sal-clustering-commons/src/main/java/org/opendaylight/controller/cluster/datastore/node/utils/stream/NormalizedNodeOutputStreamWriter.java
index 088f4dfbe98a1358a980a84e8ad3adaa99736b57..d4aab036be21df1734f4f88bc590b35030a71d21 100644 (file)
--- a/opendaylight/md-sal/sal-clustering-commons/src/main/java/org/opendaylight/controller/cluster/datastore/node/utils/stream/NormalizedNodeOutputStreamWriter.java
+++ b/opendaylight/md-sal/sal-clustering-commons/src/main/java/org/opendaylight/controller/cluster/datastore/node/utils/stream/NormalizedNodeOutputStreamWriter.java
@@ -46,6 +46,9 @@ public class NormalizedNodeOutputStreamWriter implements NormalizedNodeStreamWri
 
     private static final Logger LOG = LoggerFactory.getLogger(NormalizedNodeOutputStreamWriter.class);
 
+    static final byte SIGNATURE_MARKER = (byte) 0xab;
+    static final short CURRENT_VERSION = (short) 1;
+
     static final byte IS_CODE_VALUE = 1;
     static final byte IS_STRING_VALUE = 2;
     static final byte IS_NULL_VALUE = 3;
@@ -56,6 +59,8 @@ public class NormalizedNodeOutputStreamWriter implements NormalizedNodeStreamWri
 
     private NormalizedNodeWriter normalizedNodeWriter;
 
+    private boolean wroteSignatureMarker;
+
     public NormalizedNodeOutputStreamWriter(OutputStream stream) throws IOException {
         Preconditions.checkNotNull(stream);
         output = new DataOutputStream(stream);
@@ -74,9 +79,18 @@ public class NormalizedNodeOutputStreamWriter implements NormalizedNodeStreamWri
     }
 
     public void writeNormalizedNode(NormalizedNode<?, ?> node) throws IOException {
+        writeSignatureMarkerAndVersionIfNeeded();
         normalizedNodeWriter().write(node);
     }
 
+    private void writeSignatureMarkerAndVersionIfNeeded() throws IOException {
+        if(!wroteSignatureMarker) {
+            output.writeByte(SIGNATURE_MARKER);
+            output.writeShort(CURRENT_VERSION);
+            wroteSignatureMarker = true;
+        }
+    }
+
     @Override
     public void leafNode(YangInstanceIdentifier.NodeIdentifier name, Object value) throws IOException, IllegalArgumentException {
         Preconditions.checkNotNull(name, "Node identifier should not be null");
@@ -201,6 +215,9 @@ public class NormalizedNodeOutputStreamWriter implements NormalizedNodeStreamWri
     private void startNode(final QName qName, byte nodeType) throws IOException {
 
         Preconditions.checkNotNull(qName, "QName of node identifier should not be null.");
+
+        writeSignatureMarkerAndVersionIfNeeded();
+
         // First write the type of node
         output.writeByte(nodeType);
         // Write Start Tag
@@ -247,6 +264,11 @@ public class NormalizedNodeOutputStreamWriter implements NormalizedNodeStreamWri
     }
 
     public void writeYangInstanceIdentifier(YangInstanceIdentifier identifier) throws IOException {
+        writeSignatureMarkerAndVersionIfNeeded();
+        writeYangInstanceIdentifierInternal(identifier);
+    }
+
+    private void writeYangInstanceIdentifierInternal(YangInstanceIdentifier identifier) throws IOException {
         Iterable<YangInstanceIdentifier.PathArgument> pathArguments = identifier.getPathArguments();
         int size = Iterables.size(pathArguments);
         output.writeInt(size);
@@ -363,7 +385,7 @@ public class NormalizedNodeOutputStreamWriter implements NormalizedNodeStreamWri
                 output.write(bytes);
                 break;
             case ValueTypes.YANG_IDENTIFIER_TYPE:
-                writeYangInstanceIdentifier((YangInstanceIdentifier) value);
+                writeYangInstanceIdentifierInternal((YangInstanceIdentifier) value);
                 break;
             case ValueTypes.NULL_TYPE :
                 break;