diff --git a/apps/artemis/src/main/java/org/onosproject/artemis/impl/DataHandler.java b/apps/artemis/src/main/java/org/onosproject/artemis/impl/DataHandler.java
new file mode 100644
index 0000000..c0257a6
--- /dev/null
+++ b/apps/artemis/src/main/java/org/onosproject/artemis/impl/DataHandler.java
@@ -0,0 +1,134 @@
+/*
+ * 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.artemis.impl;
+
+import org.json.JSONObject;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.ArrayList;
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ * Helper class that handles BGP Update messages.
+ */
+public final class DataHandler {
+    private static final File DATA_FILE = new File("data.json");
+    private static final File HIJACKS_FILE = new File("hijack.json");
+
+    private final AtomicReference<ArrayList<JSONObject>> data = new AtomicReference<ArrayList<JSONObject>>();
+
+    private static DataHandler instance = new DataHandler();
+
+    private DataHandler() {
+        data.set(new ArrayList<>());
+    }
+
+    /**
+     * Singleton for data handler class.
+     *
+     * @return instance of class
+     */
+    public static synchronized DataHandler getInstance() {
+        if (instance == null) {
+            instance = new DataHandler();
+        }
+        return instance;
+    }
+
+    /**
+     * Atomic append a BGP update message to a list.
+     *
+     * @param obj BGP update message
+     */
+    public synchronized void appendData(JSONObject obj) {
+        data.get().add(obj);
+    }
+
+    /**
+     * Atomic read and clear a list of BGP updates.
+     *
+     * @return list of messages that received in 'threshold' period
+     */
+    synchronized ArrayList<JSONObject> getData() {
+        ArrayList<JSONObject> tmp = (ArrayList<JSONObject>) data.get().clone();
+        data.get().clear();
+        return tmp;
+    }
+
+    /**
+     * A serializer to write incoming BGP updates and hijack attempts to json files.
+     */
+    public static class Serializer {
+        private static RandomAccessFile fwData, fwHijack;
+        private static long lengthData, lengthHijack;
+
+        static {
+            try {
+                if (DATA_FILE.exists()) {
+                    fwData = new RandomAccessFile(DATA_FILE, "rw");
+                } else {
+                    fwData = new RandomAccessFile(DATA_FILE, "rw");
+                    fwData.writeBytes("[\n]");
+                }
+                lengthData = fwData.length() - 1;
+
+                if (HIJACKS_FILE.exists()) {
+                    fwHijack = new RandomAccessFile(HIJACKS_FILE, "rw");
+                } else {
+                    fwHijack = new RandomAccessFile(HIJACKS_FILE, "rw");
+                    fwHijack.writeBytes("[\n]");
+                }
+                lengthHijack = fwHijack.length() - 1;
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+
+        /**
+         * Writes BGP update to json file.
+         *
+         * @param data BGP update
+         */
+        public static synchronized void writeData(Object data) {
+            try {
+                String entry = data.toString() + ",\n]";
+                fwData.seek(lengthData);
+                fwData.writeBytes(entry);
+                lengthData += entry.length() - 1;
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+
+        /**
+         * Writes detected BGP hijack to json file.
+         *
+         * @param data BGP update of hijack
+         */
+        static synchronized void writeHijack(Object data) {
+            try {
+                String entry = data.toString() + ",\n]";
+                fwHijack.seek(lengthHijack);
+                fwHijack.writeBytes(entry);
+                lengthHijack += entry.length() - 1;
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}