Level2VolumeScan(RandomAccessFile orgRaf, CancelTask cancelTask) throws IOException {
this.raf = orgRaf;
if (log.isDebugEnabled()) log.debug("Level2VolumeScan on " + raf.getLocation());
raf.seek(0);
raf.order(RandomAccessFile.BIG_ENDIAN);
// volume scan header
dataFormat = raf.readString(8);
raf.skipBytes(1);
String volumeNo = raf.readString(3);
title_julianDay = raf.readInt(); // since 1/1/70
title_msecs = raf.readInt();
stationId = raf.readString(4).trim(); // only in AR2V0001
if (log.isDebugEnabled()) log.debug(" dataFormat= " + dataFormat + " stationId= " + stationId);
if (stationId.length() == 0) {
// try to get it from the filename LOOK
stationId = null;
}
// try to find the station
if (stationId != null) {
if (!stationId.startsWith("K") && stationId.length() == 4) {
String _stationId = "K" + stationId;
station = NexradStationDB.get(_stationId);
} else station = NexradStationDB.get(stationId);
}
// see if we have to uncompress
if (dataFormat.equals(AR2V0001)
|| dataFormat.equals(AR2V0003)
|| dataFormat.equals(AR2V0004)
|| dataFormat.equals(AR2V0006)) {
raf.skipBytes(4);
String BZ = raf.readString(2);
if (BZ.equals("BZ")) {
RandomAccessFile uraf;
File uncompressedFile = DiskCache.getFileStandardPolicy(raf.getLocation() + ".uncompress");
if (uncompressedFile.exists() && uncompressedFile.length() > 0) {
// see if its locked - another thread is writing it
FileInputStream fstream = null;
FileLock lock = null;
try {
fstream = new FileInputStream(uncompressedFile);
// lock = fstream.getChannel().lock(0, 1, true); // wait till its unlocked
while (true) { // loop waiting for the lock
try {
lock = fstream.getChannel().lock(0, 1, true); // wait till its unlocked
break;
} catch (OverlappingFileLockException oe) { // not sure why lock() doesnt block
try {
Thread.sleep(100); // msecs
} catch (InterruptedException e1) {
break;
}
}
}
} finally {
if (lock != null) lock.release();
if (fstream != null) fstream.close();
}
uraf = new ucar.unidata.io.RandomAccessFile(uncompressedFile.getPath(), "r");
} else {
// nope, gotta uncompress it
uraf = uncompress(raf, uncompressedFile.getPath());
if (log.isDebugEnabled())
log.debug("made uncompressed file= " + uncompressedFile.getPath());
}
// switch to uncompressed file
raf.close();
raf = uraf;
raf.order(RandomAccessFile.BIG_ENDIAN);
}
raf.seek(Level2Record.FILE_HEADER_SIZE);
}
List<Level2Record> reflectivity = new ArrayList<Level2Record>();
List<Level2Record> doppler = new ArrayList<Level2Record>();
List<Level2Record> highReflectivity = new ArrayList<Level2Record>();
List<Level2Record> highVelocity = new ArrayList<Level2Record>();
List<Level2Record> highSpectrum = new ArrayList<Level2Record>();
List<Level2Record> highDiffReflectivity = new ArrayList<Level2Record>();
List<Level2Record> highDiffPhase = new ArrayList<Level2Record>();
List<Level2Record> highCorreCoefficient = new ArrayList<Level2Record>();
long message_offset31 = 0;
int recno = 0;
while (true) {
Level2Record r = Level2Record.factory(raf, recno++, message_offset31);
if (r == null) break;
if (showData) r.dump2(System.out);
// skip non-data messages
if (r.message_type == 31) {
message_offset31 = message_offset31 + (r.message_size * 2 + 12 - 2432);
}
if (r.message_type != 1 && r.message_type != 31) {
if (showMessages) r.dumpMessage(System.out);
continue;
}
// if (showData) r.dump2(System.out);
/* skip bad
if (!r.checkOk()) {
r.dump(System.out);
continue;
} */
// some global params
if (vcp == 0) vcp = r.vcp;
if (first == null) first = r;
last = r;
if (runCheck && !r.checkOk()) {
continue;
}
if (r.hasReflectData) reflectivity.add(r);
if (r.hasDopplerData) doppler.add(r);
if (r.message_type == 31) {
if (r.hasHighResREFData) highReflectivity.add(r);
if (r.hasHighResVELData) highVelocity.add(r);
if (r.hasHighResSWData) highSpectrum.add(r);
if (r.hasHighResZDRData) highDiffReflectivity.add(r);
if (r.hasHighResPHIData) highDiffPhase.add(r);
if (r.hasHighResRHOData) highCorreCoefficient.add(r);
}
if ((cancelTask != null) && cancelTask.isCancel()) return;
}
if (debugRadials)
System.out.println(" reflect ok= " + reflectivity.size() + " doppler ok= " + doppler.size());
if (highReflectivity.size() == 0) {
reflectivityGroups = sortScans("reflect", reflectivity, 600);
dopplerGroups = sortScans("doppler", doppler, 600);
}
if (highReflectivity.size() > 0)
reflectivityHighResGroups = sortScans("reflect_HR", highReflectivity, 720);
if (highVelocity.size() > 0)
velocityHighResGroups = sortScans("velocity_HR", highVelocity, 720);
if (highSpectrum.size() > 0)
spectrumHighResGroups = sortScans("spectrum_HR", highSpectrum, 720);
if (highDiffReflectivity.size() > 0)
diffReflectHighResGroups = sortScans("diffReflect_HR", highDiffReflectivity, 720);
if (highDiffPhase.size() > 0)
diffPhaseHighResGroups = sortScans("diffPhase_HR", highDiffPhase, 720);
if (highCorreCoefficient.size() > 0)
coefficientHighResGroups = sortScans("coefficient_HR", highCorreCoefficient, 720);
}
