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/*
* Copyright © 2010 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
package org.altusmetrum.altoslib;
import java.io.*;
import java.text.ParseException;
import java.util.concurrent.LinkedBlockingQueue;
/*
* This creates a thread to capture telemetry data and write it to
* a log file
*/
public class AltosLog implements Runnable {
LinkedBlockingQueue<AltosLine> input_queue;
LinkedBlockingQueue<String> pending_queue;
int serial;
int flight;
FileWriter log_file;
Thread log_thread;
AltosFile file;
private void close_log_file() {
if (log_file != null) {
try {
log_file.close();
} catch (IOException io) {
}
log_file = null;
}
}
public void close() {
close_log_file();
if (log_thread != null) {
log_thread.interrupt();
log_thread = null;
}
}
public File file() {
return file;
}
boolean open (AltosRecord telem) throws IOException {
AltosFile a = new AltosFile(telem);
log_file = new FileWriter(a, true);
if (log_file != null) {
while (!pending_queue.isEmpty()) {
try {
String s = pending_queue.take();
log_file.write(s);
log_file.write('\n');
} catch (InterruptedException ie) {
}
}
log_file.flush();
file = a;
}
return log_file != null;
}
public void run () {
try {
AltosRecord previous = null;
for (;;) {
AltosLine line = input_queue.take();
if (line.line == null)
continue;
try {
AltosRecord telem = AltosTelemetry.parse(line.line, previous);
if ((telem.seen & AltosRecord.seen_flight) != 0 &&
(telem.serial != serial || telem.flight != flight || log_file == null))
{
close_log_file();
serial = telem.serial;
flight = telem.flight;
open(telem);
}
previous = telem;
} catch (ParseException pe) {
} catch (AltosCRCException ce) {
}
if (log_file != null) {
log_file.write(line.line);
log_file.write('\n');
log_file.flush();
} else
pending_queue.put(line.line);
}
} catch (InterruptedException ie) {
} catch (IOException ie) {
}
close();
}
public AltosLog (AltosLink link) {
pending_queue = new LinkedBlockingQueue<String> ();
input_queue = new LinkedBlockingQueue<AltosLine> ();
link.add_monitor(input_queue);
serial = -1;
flight = -1;
log_file = null;
log_thread = new Thread(this);
log_thread.start();
}
}
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