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; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 package org.altusmetrum.altoslib_11;
  20
  21 import java.io.*;
  22 import java.util.concurrent.*;
  23
  24
  25 public class AltosIdleMonitor extends Thread {
  26         AltosLink               link;
  27         AltosIdleMonitorListener        listener;
  28
  29         AltosIdleFetch          fetch;
  30
  31         boolean                 remote;
  32         boolean                 close_on_exit;
  33         double                  frequency;
  34         String                  callsign;
  35
  36         AltosListenerState      listener_state;
  37         AltosConfigData         config_data;
  38         AltosGPS                gps;
  39
  40         void start_link() throws InterruptedException, TimeoutException {
  41                 if (remote) {
  42                         link.set_radio_frequency(frequency);
  43                         link.set_callsign(callsign);
  44                         link.start_remote();
  45                 } else
  46                         link.flush_input();
  47         }
  48
  49         boolean stop_link() throws InterruptedException, TimeoutException {
  50                 if (remote)
  51                         link.stop_remote();
  52                 return link.reply_abort;
  53         }
  54
  55         boolean update_state(AltosState state) throws InterruptedException, TimeoutException, AltosUnknownProduct {
  56                 boolean         worked = false;
  57                 boolean         aborted = false;
  58
  59                 try {
  60                         start_link();
  61                         fetch.update_state(state);
  62                         if (!link.has_error && !link.reply_abort)
  63                                 worked = true;
  64                 } finally {
  65                         aborted = stop_link();
  66                         if (worked) {
  67                                 if (remote)
  68                                         state.set_rssi(link.rssi(), 0);
  69                                 listener_state.battery = link.monitor_battery();
  70                         }
  71                 }
  72                 return aborted;
  73         }
  74
  75         public void set_frequency(double in_frequency) {
  76                 frequency = in_frequency;
  77                 link.abort_reply();
  78         }
  79
  80         public void set_callsign(String in_callsign) {
  81                 callsign = in_callsign;
  82                 link.abort_reply();
  83         }
  84
  85         public void abort() throws InterruptedException {
  86                 while (isAlive()) {
  87                         interrupt();
  88                         link.abort_reply();
  89                         Thread.sleep(100);
  90                 }
  91                 join();
  92         }
  93
  94         public void run() {
  95                 AltosState state = new AltosState();
  96                 try {
  97                         for (;;) {
  98                                 try {
  99                                         link.config_data();
 100                                         update_state(state);
 101                                         listener.update(state, listener_state);
 102                                 } catch (TimeoutException te) {
 103                                 } catch (AltosUnknownProduct ae) {
 104                                         listener.error(String.format("Unknown product \"%s\"", ae.product));
 105                                 }
 106                                 if (link.has_error || link.reply_abort) {
 107                                         listener.failed();
 108                                         break;
 109                                 }
 110                                 Thread.sleep(1000);
 111                         }
 112                 } catch (InterruptedException ie) {
 113                 }
 114                 if (close_on_exit) {
 115                         try {
 116                                 link.close();
 117                         } catch (InterruptedException ie) {
 118                         }
 119                 }
 120         }
 121
 122         public AltosIdleMonitor(AltosIdleMonitorListener in_listener, AltosLink in_link, boolean in_remote, boolean in_close_on_exit) {
 123                 listener = in_listener;
 124                 link = in_link;
 125                 remote = in_remote;
 126                 close_on_exit = in_close_on_exit;
 127                 listener_state = new AltosListenerState();
 128                 fetch = new AltosIdleFetch(link);
 129         }
 130
 131         public AltosIdleMonitor(AltosIdleMonitorListener in_listener, AltosLink in_link, boolean in_remote) {
 132                 this(in_listener, in_link, in_remote, true);
 133         }
 134 }
 135