Kafka Codec Integration

Made changes as per the comments on patch set 2.
Made changes as per comments on patch set 3.
Made further changes and event subscription works absolutely fine now.

Change-Id: Icd20195f6c0e045d14beb73584069d486ab9290c
diff --git a/apps/kafka-integration/app/src/main/java/org/onosproject/kafkaintegration/impl/KafkaCodecRegistrator.java b/apps/kafka-integration/app/src/main/java/org/onosproject/kafkaintegration/impl/KafkaCodecRegistrator.java
new file mode 100644
index 0000000..47098fa
--- /dev/null
+++ b/apps/kafka-integration/app/src/main/java/org/onosproject/kafkaintegration/impl/KafkaCodecRegistrator.java
@@ -0,0 +1,48 @@
+/**
+ * Copyright 2016-present Open Networking Laboratory
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.kafkaintegration.impl;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onosproject.codec.CodecService;
+import org.onosproject.kafkaintegration.api.dto.EventSubscriber;
+import org.onosproject.kafkaintegration.rest.SubscriberCodec;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Implementation of the JSON codec brokering service for Kafka app.
+ */
+@Component(immediate = true)
+public class KafkaCodecRegistrator {
+    private static Logger log = LoggerFactory.getLogger(KafkaCodecRegistrator
+                                                                .class);
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected CodecService codecService;
+
+    @Activate
+    public void activate() {
+        codecService.registerCodec(EventSubscriber.class, new SubscriberCodec());
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        log.info("Stopped");
+    }
+}