git.gag.com Git - fw/altos/blob - ao-tools/altosui/AltosLog.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 altosui;
  19
  20 import java.io.*;
  21 import java.lang.*;
  22 import java.util.*;
  23 import java.text.ParseException;
  24 import java.util.concurrent.LinkedBlockingQueue;
  25 import altosui.AltosSerial;
  26 import altosui.AltosFile;
  27
  28 /*
  29  * This creates a thread to capture telemetry data and write it to
  30  * a log file
  31  */
  32 class AltosLog implements Runnable {
  33
  34         LinkedBlockingQueue<String>     input_queue;
  35         LinkedBlockingQueue<String>     pending_queue;
  36         int                             serial;
  37         int                             flight;
  38         FileWriter                      log_file;
  39         Thread                          log_thread;
  40
  41         void close() throws IOException {
  42                 if (log_file != null)
  43                         log_file.close();
  44         }
  45
  46         boolean open (AltosTelemetry telem) throws IOException {
  47                 AltosFile       a = new AltosFile(telem);
  48
  49                 log_file = new FileWriter(a, true);
  50                 if (log_file != null) {
  51                         while (!pending_queue.isEmpty()) {
  52                                 try {
  53                                         String s = pending_queue.take();
  54                                         log_file.write(s);
  55                                         log_file.write('\n');
  56                                 } catch (InterruptedException ie) {
  57                                 }
  58                         }
  59                         log_file.flush();
  60                 }
  61                 return log_file != null;
  62         }
  63
  64         public void run () {
  65                 try {
  66                         for (;;) {
  67                                 String  line = input_queue.take();
  68                                 try {
  69                                         AltosTelemetry  telem = new AltosTelemetry(line);
  70                                         if (telem.serial != serial || telem.flight != flight || log_file == null) {
  71                                                 close();
  72                                                 serial = telem.serial;
  73                                                 flight = telem.flight;
  74                                                 open(telem);
  75                                         }
  76                                 } catch (ParseException pe) {
  77                                 }
  78                                 if (log_file != null) {
  79                                         log_file.write(line);
  80                                         log_file.write('\n');
  81                                         log_file.flush();
  82                                 } else
  83                                         pending_queue.put(line);
  84                         }
  85                 } catch (InterruptedException ie) {
  86                 } catch (IOException ie) {
  87                 }
  88                 try {
  89                         close();
  90                 } catch (IOException ie) {
  91                 }
  92         }
  93
  94         public AltosLog (AltosSerial s) {
  95                 pending_queue = new LinkedBlockingQueue<String> ();
  96                 input_queue = new LinkedBlockingQueue<String> ();
  97                 s.add_monitor(input_queue);
  98                 serial = -1;
  99                 flight = -1;
 100                 log_file = null;
 101                 log_thread = new Thread(this);
 102                 log_thread.start();
 103         }
 104 }