git.gag.com Git - fw/altos/blob - 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
  26 /*
  27  * This creates a thread to capture telemetry data and write it to
  28  * a log file
  29  */
  30 class AltosLog implements Runnable {
  31
  32         LinkedBlockingQueue<AltosLine>  input_queue;
  33         LinkedBlockingQueue<String>     pending_queue;
  34         int                             serial;
  35         int                             flight;
  36         FileWriter                      log_file;
  37         Thread                          log_thread;
  38
  39         private void close_log_file() {
  40                 if (log_file != null) {
  41                         try {
  42                                 log_file.close();
  43                         } catch (IOException io) {
  44                         }
  45                         log_file = null;
  46                 }
  47         }
  48
  49         void close() {
  50                 close_log_file();
  51                 if (log_thread != null) {
  52                         log_thread.interrupt();
  53                         log_thread = null;
  54                 }
  55         }
  56
  57         boolean open (AltosRecord telem) throws IOException {
  58                 AltosFile       a = new AltosFile(telem);
  59
  60                 System.out.printf("open %s\n", a.toString());
  61                 log_file = new FileWriter(a, true);
  62                 if (log_file != null) {
  63                         while (!pending_queue.isEmpty()) {
  64                                 try {
  65                                         String s = pending_queue.take();
  66                                         log_file.write(s);
  67                                         log_file.write('\n');
  68                                 } catch (InterruptedException ie) {
  69                                 }
  70                         }
  71                         log_file.flush();
  72                 }
  73                 return log_file != null;
  74         }
  75
  76         public void run () {
  77                 try {
  78                         AltosRecord     previous = null;
  79                         for (;;) {
  80                                 AltosLine       line = input_queue.take();
  81                                 if (line.line == null)
  82                                         continue;
  83                                 try {
  84                                         AltosRecord     telem = AltosTelemetry.parse(line.line, previous);
  85                                         if (telem.serial != 0 && telem.flight != 0 &&
  86                                             (telem.serial != serial || telem.flight != flight || log_file == null))
  87                                         {
  88                                                 close_log_file();
  89                                                 serial = telem.serial;
  90                                                 flight = telem.flight;
  91                                                 System.out.printf("Opening telem %d %d\n", serial, flight);
  92                                                 open(telem);
  93                                         }
  94                                         previous = telem;
  95                                 } catch (ParseException pe) {
  96                                 } catch (AltosCRCException ce) {
  97                                 }
  98                                 if (log_file != null) {
  99                                         log_file.write(line.line);
 100                                         log_file.write('\n');
 101                                         log_file.flush();
 102                                 } else
 103                                         pending_queue.put(line.line);
 104                         }
 105                 } catch (InterruptedException ie) {
 106                 } catch (IOException ie) {
 107                 }
 108                 close();
 109         }
 110
 111         public AltosLog (AltosSerial s) {
 112                 pending_queue = new LinkedBlockingQueue<String> ();
 113                 input_queue = new LinkedBlockingQueue<AltosLine> ();
 114                 s.add_monitor(input_queue);
 115                 serial = -1;
 116                 flight = -1;
 117                 log_file = null;
 118                 log_thread = new Thread(this);
 119                 log_thread.start();
 120         }
 121 }