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
  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 (AltosTelemetry telem) throws IOException {
  58                 AltosFile       a = new AltosFile(telem);
  59
  60                 log_file = new FileWriter(a, true);
  61                 if (log_file != null) {
  62                         while (!pending_queue.isEmpty()) {
  63                                 try {
  64                                         String s = pending_queue.take();
  65                                         log_file.write(s);
  66                                         log_file.write('\n');
  67                                 } catch (InterruptedException ie) {
  68                                 }
  69                         }
  70                         log_file.flush();
  71                 }
  72                 return log_file != null;
  73         }
  74
  75         public void run () {
  76                 try {
  77                         for (;;) {
  78                                 AltosLine       line = input_queue.take();
  79                                 if (line.line == null)
  80                                         continue;
  81                                 try {
  82                                         AltosTelemetry  telem = new AltosTelemetry(line.line);
  83                                         if (telem.serial != serial || telem.flight != flight || log_file == null) {
  84                                                 close_log_file();
  85                                                 serial = telem.serial;
  86                                                 flight = telem.flight;
  87                                                 open(telem);
  88                                         }
  89                                 } catch (ParseException pe) {
  90                                 } catch (AltosCRCException ce) {
  91                                 }
  92                                 if (log_file != null) {
  93                                         log_file.write(line.line);
  94                                         log_file.write('\n');
  95                                         log_file.flush();
  96                                 } else
  97                                         pending_queue.put(line.line);
  98                         }
  99                 } catch (InterruptedException ie) {
 100                 } catch (IOException ie) {
 101                 }
 102                 close();
 103         }
 104
 105         public AltosLog (AltosSerial s) {
 106                 pending_queue = new LinkedBlockingQueue<String> ();
 107                 input_queue = new LinkedBlockingQueue<AltosLine> ();
 108                 s.add_monitor(input_queue);
 109                 serial = -1;
 110                 flight = -1;
 111                 log_file = null;
 112                 log_thread = new Thread(this);
 113                 log_thread.start();
 114         }
 115 }