// read or create index
private void readOrCreateIndex(CollectionManager.Force ff, Formatter f) throws IOException {
// force new index or test for new index needed
boolean force =
((ff == CollectionManager.Force.always)
|| (ff == CollectionManager.Force.test && needsUpdate()));
// otherwise, we're good as long as the index file exists
File idx = gc.getIndexFile();
if (force || !idx.exists() || !readIndex(idx.getPath())) {
logger.info("GribCollection {}: createIndex {}", gc.getName(), idx.getPath());
createIndex(idx, ff, f); // write out index
gc.rafLocation = idx.getPath();
gc.setRaf(new RandomAccessFile(idx.getPath(), "r"));
readIndex(gc.getRaf()); // read back in index
}
}
public boolean readIndex(RandomAccessFile raf) {
gc.setRaf(raf); // LOOK leaving the raf open in the GribCollection
try {
raf.order(RandomAccessFile.BIG_ENDIAN);
raf.seek(0);
//// header message
if (!NcStream.readAndTest(raf, MAGIC_START.getBytes())) {
logger.error("GribCollection {}: invalid index", gc.getName());
return false;
}
int v = raf.readInt();
if (v != getVersion()) {
logger.warn(
"GribCollection {}: index found version={}, want version= {} on file {}",
new Object[] {gc.getName(), v, version, raf.getLocation()});
return false;
}
long skip = raf.readLong();
raf.skipBytes(skip);
int size = NcStream.readVInt(raf);
if ((size < 0) || (size > 100 * 1000 * 1000)) {
logger.warn("GribCollection {}: invalid index ", gc.getName());
return false;
}
byte[] m = new byte[size];
raf.readFully(m);
GribCollectionProto.GribCollectionIndex proto =
GribCollectionProto.GribCollectionIndex.parseFrom(m);
gc.center = proto.getCenter();
gc.subcenter = proto.getSubcenter();
gc.master = proto.getMaster();
gc.local = proto.getLocal();
gc.genProcessType = proto.getGenProcessType();
gc.genProcessId = proto.getGenProcessId();
gc.backProcessId = proto.getBackProcessId();
gc.local = proto.getLocal();
// gc.tables = Grib2Tables.factory(gc.center, gc.subcenter, gc.master, gc.local);
gc.filenames = new ArrayList<String>(proto.getFilesCount());
for (int i = 0; i < proto.getFilesCount(); i++) gc.filenames.add(proto.getFiles(i));
// error condition on a GribCollection Index
if ((proto.getFilesCount() == 0) && !(this instanceof TimePartitionBuilder)) {
logger.warn("GribCollection {}: has no files, force recreate ", gc.getName());
return false;
}
gc.groups = new ArrayList<GribCollection.GroupHcs>(proto.getGroupsCount());
for (int i = 0; i < proto.getGroupsCount(); i++)
gc.groups.add(readGroup(proto.getGroups(i), gc.makeGroup()));
Collections.sort(gc.groups);
gc.params = new ArrayList<Parameter>(proto.getParamsCount());
for (int i = 0; i < proto.getParamsCount(); i++) gc.params.add(readParam(proto.getParams(i)));
if (!readPartitions(proto)) {
logger.warn("TimePartition {}: has no partitions, force recreate ", gc.getName());
return false;
}
return true;
} catch (Throwable t) {
logger.error("Error reading index " + raf.getLocation(), t);
return false;
}
}