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   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 org.altusmetrum.AltosLib.*;
  26
  27 /*
  28  * This creates a thread to capture telemetry data and write it to
  29  * a log file
  30  */
  31 class AltosLog implements Runnable {
  32
  33         LinkedBlockingQueue<AltosLine>  input_queue;
  34         LinkedBlockingQueue<String>     pending_queue;
  35         int                             serial;
  36         int                             flight;
  37         FileWriter                      log_file;
  38         Thread                          log_thread;
  39         AltosFile                       file;
  40
  41         private void close_log_file() {
  42                 if (log_file != null) {
  43                         try {
  44                                 log_file.close();
  45                         } catch (IOException io) {
  46                         }
  47                         log_file = null;
  48                 }
  49         }
  50
  51         void close() {
  52                 close_log_file();
  53                 if (log_thread != null) {
  54                         log_thread.interrupt();
  55                         log_thread = null;
  56                 }
  57         }
  58
  59         File file() {
  60                 return file;
  61         }
  62
  63         boolean open (AltosRecord telem) throws IOException {
  64                 AltosFile       a = new AltosFile(telem);
  65
  66                 System.out.printf("open %s\n", a.toString());
  67                 log_file = new FileWriter(a, true);
  68                 if (log_file != null) {
  69                         while (!pending_queue.isEmpty()) {
  70                                 try {
  71                                         String s = pending_queue.take();
  72                                         log_file.write(s);
  73                                         log_file.write('\n');
  74                                 } catch (InterruptedException ie) {
  75                                 }
  76                         }
  77                         log_file.flush();
  78                         file = a;
  79                 }
  80                 return log_file != null;
  81         }
  82
  83         public void run () {
  84                 try {
  85                         AltosRecord     previous = null;
  86                         for (;;) {
  87                                 AltosLine       line = input_queue.take();
  88                                 if (line.line == null)
  89                                         continue;
  90                                 try {
  91                                         AltosRecord     telem = AltosTelemetry.parse(line.line, previous);
  92                                         if (telem.serial != 0 && telem.flight != 0 &&
  93                                             (telem.serial != serial || telem.flight != flight || log_file == null))
  94                                         {
  95                                                 close_log_file();
  96                                                 serial = telem.serial;
  97                                                 flight = telem.flight;
  98                                                 open(telem);
  99                                         }
 100                                         previous = telem;
 101                                 } catch (ParseException pe) {
 102                                 } catch (AltosCRCException ce) {
 103                                 }
 104                                 if (log_file != null) {
 105                                         log_file.write(line.line);
 106                                         log_file.write('\n');
 107                                         log_file.flush();
 108                                 } else
 109                                         pending_queue.put(line.line);
 110                         }
 111                 } catch (InterruptedException ie) {
 112                 } catch (IOException ie) {
 113                 }
 114                 close();
 115         }
 116
 117         public AltosLog (AltosSerial s) {
 118                 pending_queue = new LinkedBlockingQueue<String> ();
 119                 input_queue = new LinkedBlockingQueue<AltosLine> ();
 120                 s.add_monitor(input_queue);
 121                 serial = -1;
 122                 flight = -1;
 123                 log_file = null;
 124                 log_thread = new Thread(this);
 125                 log_thread.start();
 126         }
 127 }