git.gag.com Git - fw/altos/blob - altoslib/AltosIdleMonitor.java

   1 /*
   2  * Copyright © 2010 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package org.altusmetrum.altoslib_7;
  19
  20 import java.io.*;
  21 import java.util.concurrent.*;
  22
  23
  24 public class AltosIdleMonitor extends Thread {
  25         AltosLink               link;
  26         AltosIdleMonitorListener        listener;
  27
  28         AltosIdleFetch          fetch;
  29
  30         boolean                 remote;
  31         double                  frequency;
  32         String                  callsign;
  33
  34         AltosListenerState      listener_state;
  35         AltosConfigData         config_data;
  36         AltosGPS                gps;
  37
  38         void start_link() throws InterruptedException, TimeoutException {
  39                 if (remote) {
  40                         link.set_radio_frequency(frequency);
  41                         link.set_callsign(callsign);
  42                         link.start_remote();
  43                 } else
  44                         link.flush_input();
  45         }
  46
  47         boolean stop_link() throws InterruptedException, TimeoutException {
  48                 if (remote)
  49                         link.stop_remote();
  50                 return link.reply_abort;
  51         }
  52
  53         boolean update_state(AltosState state) throws InterruptedException, TimeoutException {
  54                 boolean         worked = false;
  55                 boolean         aborted = false;
  56
  57                 try {
  58                         start_link();
  59                         fetch.update_state(state);
  60                         if (!link.has_error && !link.reply_abort)
  61                                 worked = true;
  62                 } finally {
  63                         aborted = stop_link();
  64                         if (worked) {
  65                                 if (remote)
  66                                         state.set_rssi(link.rssi(), 0);
  67                                 listener_state.battery = link.monitor_battery();
  68                         }
  69                 }
  70                 return aborted;
  71         }
  72
  73         public void set_frequency(double in_frequency) {
  74                 frequency = in_frequency;
  75                 link.abort_reply();
  76         }
  77
  78         public void set_callsign(String in_callsign) {
  79                 callsign = in_callsign;
  80                 link.abort_reply();
  81         }
  82
  83         public void abort() throws InterruptedException {
  84                 while (isAlive()) {
  85                         interrupt();
  86                         link.abort_reply();
  87                         Thread.sleep(100);
  88                 }
  89                 join();
  90         }
  91
  92         public void run() {
  93                 AltosState state = new AltosState();
  94                 try {
  95                         for (;;) {
  96                                 try {
  97                                         link.config_data();
  98                                         update_state(state);
  99                                         listener.update(state, listener_state);
 100                                 } catch (TimeoutException te) {
 101                                 }
 102                                 if (link.has_error || link.reply_abort) {
 103                                         listener.failed();
 104                                         break;
 105                                 }
 106                                 Thread.sleep(1000);
 107                         }
 108                 } catch (InterruptedException ie) {
 109                 }
 110                 try {
 111                         link.close();
 112                 } catch (InterruptedException ie) {
 113                 }
 114         }
 115
 116         public AltosIdleMonitor(AltosIdleMonitorListener in_listener, AltosLink in_link, boolean in_remote)
 117                 throws FileNotFoundException, InterruptedException, TimeoutException {
 118                 listener = in_listener;
 119                 link = in_link;
 120                 remote = in_remote;
 121                 listener_state = new AltosListenerState();
 122                 fetch = new AltosIdleFetch(link);
 123         }
 124 }