| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * 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(); |
| } |
| } |
| } |
| } |