| 1 | // Copyright 2004-2007 Jean-Francois Poilpret |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package net.sourceforge.hiveboard.event; |
| 16 | |
| 17 | import org.apache.commons.logging.Log; |
| 18 | import org.apache.hivemind.service.ThreadEventNotifier; |
| 19 | |
| 20 | import net.sourceforge.hiveboard.Event; |
| 21 | import net.sourceforge.hiveboard.WhiteBoardUserService; |
| 22 | import net.sourceforge.hiveevents.Channel; |
| 23 | |
| 24 | public class EventDispatcherImpl implements EventDispatcher, Runnable |
| 25 | { |
| 26 | public EventDispatcherImpl(Log logger, |
| 27 | WhiteBoardUserService service, |
| 28 | ThreadEventNotifier notifier, |
| 29 | Channel<Event> channel) |
| 30 | { |
| 31 | _logger = logger; |
| 32 | _service = service; |
| 33 | _notifier = notifier; |
| 34 | _channel = channel; |
| 35 | _stop = true; |
| 36 | _thread = new Thread(this); |
| 37 | } |
| 38 | |
| 39 | public void stop() |
| 40 | { |
| 41 | _stop = true; |
| 42 | } |
| 43 | |
| 44 | public void start() |
| 45 | { |
| 46 | _stop = false; |
| 47 | _thread.start(); |
| 48 | } |
| 49 | |
| 50 | public void waitForCompletion() |
| 51 | { |
| 52 | try |
| 53 | { |
| 54 | _thread.join(); |
| 55 | } |
| 56 | catch (InterruptedException e) |
| 57 | { |
| 58 | _logger.warn("waitForCompletion", e); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | public void run() |
| 63 | { |
| 64 | while (!_stop) |
| 65 | { |
| 66 | // CSOFF: IllegalCatchCheck |
| 67 | try |
| 68 | { |
| 69 | Event[] events = _service.pull(); |
| 70 | if (!_stop) |
| 71 | { |
| 72 | fireEvents(events); |
| 73 | } |
| 74 | } |
| 75 | catch (Exception e) |
| 76 | { |
| 77 | _logger.warn("pull", e); |
| 78 | delay(); |
| 79 | } |
| 80 | // CSON: IllegalCatchCheck |
| 81 | } |
| 82 | _notifier.fireThreadCleanup(); |
| 83 | } |
| 84 | |
| 85 | private void delay() |
| 86 | { |
| 87 | try |
| 88 | { |
| 89 | Thread.sleep(WAIT_AFTER_EXCEPTION); |
| 90 | } |
| 91 | catch (InterruptedException e) |
| 92 | { |
| 93 | _logger.warn("delay", e); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | protected void fireEvents(Event[] events) |
| 98 | { |
| 99 | for (int i = 0; i < events.length; i++) |
| 100 | { |
| 101 | _channel.push(events[i]); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | static final private long WAIT_AFTER_EXCEPTION = 200L; |
| 106 | |
| 107 | final private Log _logger; |
| 108 | final private WhiteBoardUserService _service; |
| 109 | final private ThreadEventNotifier _notifier; |
| 110 | final private Channel<Event> _channel; |
| 111 | final private Thread _thread; |
| 112 | private boolean _stop; |
| 113 | } |
| 114 | |