Loosen Kryo config only for DistributedIntentStore

Change-Id: Ie3f05e2d894b0d44f7c0ad645b77c65d1f2ce02b

@@ -30,6 +30,9 @@ import org.onlab.onos.net.intent.IntentStore;
 import org.onlab.onos.net.intent.IntentStoreDelegate;
 import org.onlab.onos.store.hz.AbstractHazelcastStore;
 import org.onlab.onos.store.hz.SMap;
+import org.onlab.onos.store.serializers.KryoNamespaces;
+import org.onlab.onos.store.serializers.KryoSerializer;
+import org.onlab.util.KryoNamespace;
 import org.slf4j.Logger;
 
 import java.util.List;
@@ -61,9 +64,21 @@ public class DistributedIntentStore
     @Activate
     public void activate() {
         // FIXME: We need a way to add serializer for intents which has been plugged-in.
-        // TODO: As a short term workaround, relax Kryo config to
-        //       registrationRequired=false?
+        // As a short term workaround, relax Kryo config to
+        // registrationRequired=false
         super.activate();
+        super.serializer = new KryoSerializer() {
+
+            @Override
+            protected void setupKryoPool() {
+                serializerPool = KryoNamespace.newBuilder()
+                        .setRegistrationRequired(false)
+                        .register(KryoNamespaces.API)
+                        .build()
+                        .populate(1);
+            }
+
+        };
 
         // TODO: enable near cache, allow read from backup for this IMap
         IMap<byte[], byte[]> rawIntents = super.theInstance.getMap("intents");

@@ -56,6 +56,7 @@ public final class KryoNamespace implements KryoFactory {
     public static final class Builder {
 
         private final List<Pair<Class<?>, Serializer<?>>> types = new ArrayList<>();
+        private boolean registrationRequired = true;
 
         /**
          * Builds a {@link KryoNamespace} instance.
@@ -63,7 +64,7 @@ public final class KryoNamespace implements KryoFactory {
          * @return KryoNamespace
          */
         public KryoNamespace build() {
-            return new KryoNamespace(types);
+            return new KryoNamespace(types, registrationRequired);
         }
 
         /**
@@ -101,6 +102,11 @@ public final class KryoNamespace implements KryoFactory {
             types.addAll(pool.registeredTypes);
             return this;
         }
+
+        public Builder setRegistrationRequired(boolean registrationRequired) {
+            this.registrationRequired = registrationRequired;
+            return this;
+        }
     }
 
     /**
@@ -116,11 +122,11 @@ public final class KryoNamespace implements KryoFactory {
      * Creates a Kryo instance pool.
      *
      * @param registeredTypes types to register
+     * @param registrationRequired
      */
-    private KryoNamespace(final List<Pair<Class<?>, Serializer<?>>> registeredTypes) {
+    private KryoNamespace(final List<Pair<Class<?>, Serializer<?>>> registeredTypes, boolean registrationRequired) {
         this.registeredTypes = ImmutableList.copyOf(registeredTypes);
-        // always true for now
-        this.registrationRequired = true;
+        this.registrationRequired = registrationRequired;
     }
 
     /**