public void load(ArrayList<AirspaceArea> areas, String storage) {
this.storage = storage;
try {
File extpath = Storage.getStorage(storage);
File srcpath = new File(extpath, Config.path + "clearance.dat");
FileInputStream fs = new FileInputStream(srcpath);
DataInputStream ds = new DataInputStream(fs);
HashMap<String, ArrayList<AirspaceArea>> id2areas =
new HashMap<String, ArrayList<AirspaceArea>>();
for (AirspaceArea a : areas) {
a.cleared = 0;
String id = a.getIdentity();
ArrayList<AirspaceArea> l = id2areas.get(id);
if (l == null) {
l = new ArrayList<AirspaceArea>();
id2areas.put(id, l);
}
l.add(a);
}
int version = ds.readByte();
if (version != 1) throw new RuntimeException("Unknown on-disk format");
int len = ds.readInt();
for (int i = 0; i < len; ++i) {
String id = ds.readUTF();
long when = ds.readLong();
ArrayList<AirspaceArea> l = id2areas.get(id);
if (l != null) for (AirspaceArea a : l) a.cleared = when;
}
} catch (Throwable e) {
e.printStackTrace();
Log.i("fplan", "Couldn't load clearances");
}
}
@Override
protected Void doInBackground(ArrayList<AirspaceArea>... params) {
try {
if (params.length == 0) return null;
ArrayList<AirspaceArea> last = params[params.length - 1];
File extpath = Storage.getStorage(storage);
File tmppath = new File(extpath, Config.path + "clearance.dat.tmp");
File dstpath = new File(extpath, Config.path + "clearance.dat");
FileOutputStream fs = new FileOutputStream(tmppath);
DataOutputStream ds = new DataOutputStream(fs);
ds.writeByte(1); // Version
ArrayList<String> cleared = new ArrayList<String>();
ArrayList<Long> clearedwhen = new ArrayList<Long>();
long now = new Date().getTime();
for (AirspaceArea a : last) {
long ago = now - a.cleared;
if (ago > Config.clearance_valid_time) a.cleared = 0;
if (a.cleared != 0) {
cleared.add(a.getIdentity());
clearedwhen.add(a.cleared);
}
}
ds.writeInt(cleared.size());
for (int i = 0; i < cleared.size(); ++i) {
String id = cleared.get(i);
Long when = clearedwhen.get(i);
ds.writeUTF(id);
ds.writeLong(when);
}
tmppath.renameTo(dstpath);
} catch (Throwable e) {
e.printStackTrace();
Log.i("fplan", "Couldn't persist clearances");
}
return null;
}
@SuppressWarnings("unchecked")
void update(Location loc, AirspaceLookupIf lookup) {
if (loc == null || lookup == null) return;
final float gs = (float) (loc.getSpeed() * 3.6 / 1.852);
if (gs < 4) {
++count_standstill;
if (last_update == 0) last_update = SystemClock.elapsedRealtime();
if (count_standstill > 20 && SystemClock.elapsedRealtime() - last_update > 1000l * 60 * 10) {
last_update = SystemClock.elapsedRealtime();
count_standstill = 0;
boolean needswork = false;
for (AirspaceArea area : lookup.getAllAirspace()) {
if (area.cleared != 0) {
area.cleared = 0;
needswork = true;
}
}
if (needswork) save(lookup);
}
} else {
last_update = SystemClock.elapsedRealtime();
count_standstill = 0;
}
}