| /******************************************************************************* |
| * Copyright (c) 2013 Boeing. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Boeing - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ote.bytemessage; |
| |
| import java.util.Dictionary; |
| import java.util.HashMap; |
| import java.util.Hashtable; |
| import java.util.Map; |
| import java.util.UUID; |
| |
| import org.eclipse.ote.services.core.ServiceUtility; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceRegistration; |
| import org.osgi.service.event.Event; |
| import org.osgi.service.event.EventAdmin; |
| import org.osgi.service.event.EventHandler; |
| |
| public class OteByteMessageUtil { |
| |
| public final static String BYTE_KEY = "oteeventbytes"; |
| |
| public final static String BYTE_KEY_2 = "bytes"; |
| |
| public static void sendEvent(OteByteMessage message) { |
| EventAdmin eventAdmin = ServiceUtility.getService(EventAdmin.class); |
| sendEvent(message, eventAdmin); |
| } |
| |
| /** |
| * If reusing a message that has been transmitted previously, |
| * the TTL must be reset to enable transmission. |
| */ |
| public static void sendEventResetTTL(OteByteMessage message) { |
| message.getHeader().TTL.setNoLog(0); |
| sendEvent(message); |
| } |
| |
| public static void sendEvent(OteByteMessage message, EventAdmin eventAdmin) { |
| message.getHeader().UUID_HIGH.setNoLog((long) 0x0); |
| message.getHeader().UUID_LOW.setNoLog((long) 0x0); |
| Map<String, Object> data = new HashMap<String, Object>(); |
| data.put(BYTE_KEY, message.getData()); |
| Event newevent = new Event(message.getHeader().TOPIC.getValue(), data); |
| eventAdmin.sendEvent(newevent); |
| } |
| |
| public static void postEvent(OteByteMessage message) { |
| EventAdmin eventAdmin = ServiceUtility.getService(EventAdmin.class); |
| postEvent(message, eventAdmin); |
| } |
| |
| public static void postEvent(OteByteMessage message, EventAdmin eventAdmin) { |
| message.getHeader().UUID_HIGH.setNoLog((long) 0x0); |
| message.getHeader().UUID_LOW.setNoLog((long) 0x0); |
| Map<String, Object> data = new HashMap<String, Object>(); |
| data.put(BYTE_KEY, message.getData()); |
| Event newevent = new Event(message.getHeader().TOPIC.getValue(), data); |
| eventAdmin.postEvent(newevent); |
| } |
| |
| public static UUID getUUID(OteByteMessage msg) { |
| return new UUID(msg.getHeader().UUID_HIGH.getValue(), msg.getHeader().UUID_LOW.getValue()); |
| } |
| |
| public static UUID getUUID(byte[] data) { |
| long low = getLong(data, 74); |
| long high = getLong(data, 82); |
| return new UUID(high, low); |
| } |
| |
| private static long getLong(byte[] data, int index){ |
| return |
| (long)(0xff & data[index]) << 56 | |
| (long)(0xff & data[index+1]) << 48 | |
| (long)(0xff & data[index+2]) << 40 | |
| (long)(0xff & data[index+3]) << 32 | |
| (long)(0xff & data[index+4]) << 24 | |
| (long)(0xff & data[index+5]) << 16 | |
| (long)(0xff & data[index+6]) << 8 | |
| (long)(0xff & data[index+7]) << 0; |
| } |
| |
| public static void setUUID(OteByteMessage msg, UUID id) { |
| msg.getHeader().UUID_HIGH.setValue(id.getMostSignificantBits()); |
| msg.getHeader().UUID_LOW.setValue(id.getLeastSignificantBits()); |
| } |
| |
| public static OteByteMessage getOteByteMessage(Event event) { |
| Object obj = event.getProperty(BYTE_KEY); |
| if (obj != null && obj instanceof byte[]) { |
| return new OteByteMessage((byte[]) obj); |
| } else { |
| obj = event.getProperty(BYTE_KEY_2); |
| if (obj != null && obj instanceof byte[]) { |
| return new OteByteMessage((byte[]) obj); |
| } |
| } |
| return null; |
| } |
| |
| public static byte[] getBytes(Event event) { |
| Object obj = event.getProperty(BYTE_KEY); |
| if (obj != null && obj instanceof byte[]) { |
| return (byte[]) obj; |
| } else { |
| obj = event.getProperty(BYTE_KEY_2); |
| if (obj != null && obj instanceof byte[]) { |
| return (byte[]) obj; |
| } |
| } |
| return null; |
| } |
| |
| public static void putBytes(Event event, OteByteMessage signal) { |
| signal.getDefaultMessageData().getMem().setData(getBytes(event)); |
| } |
| |
| public static ServiceRegistration<EventHandler> subscribe(String topic, EventHandler handler){ |
| Dictionary<String, String> props = new Hashtable<String, String>(); |
| props.put("event.topics", topic); |
| return ServiceUtility.getContext().registerService(EventHandler.class, handler, props); |
| } |
| |
| public static ServiceRegistration<EventHandler> subscribe(OteByteMessage signal, EventHandler eventHandler) { |
| BundleContext context = ServiceUtility.getContext(); |
| if (context == null) { |
| return null; |
| } |
| Hashtable<String, Object> props = new Hashtable<String, Object>(); |
| props.put("event.topics", signal.getHeader().TOPIC.getValue()); |
| return context.registerService(EventHandler.class, eventHandler, props); |
| } |
| |
| public static <T extends OteByteMessage> ServiceRegistration<EventHandler> subscribe(T signal, OteByteMessageListener<T> eventHandler) { |
| BundleContext context = ServiceUtility.getContext(); |
| if (context == null) { |
| return null; |
| } |
| Hashtable<String, Object> props = new Hashtable<String, Object>(); |
| props.put("event.topics", signal.getHeader().TOPIC.getValue()); |
| return context.registerService(EventHandler.class, new EventHandlerForOteByteMessage<T>(signal, eventHandler), props); |
| } |
| |
| private static class EventHandlerForOteByteMessage<T extends OteByteMessage> implements EventHandler { |
| |
| private final T message; |
| private OteByteMessageListener<T> listener; |
| |
| public EventHandlerForOteByteMessage(T message, OteByteMessageListener<T> listener){ |
| this.message = message; |
| this.listener = listener; |
| } |
| |
| @Override |
| public void handleEvent(Event arg0) { |
| try{ |
| message.getActiveDataSource().getMem().setData(OteByteMessageUtil.getBytes(arg0)); |
| listener.onDataAvailable(message); |
| } catch (Throwable th){ |
| th.printStackTrace(); |
| } |
| } |
| |
| } |
| |
| } |