bool checkSavedFileCRC(IFile * ifile, bool & timesDiffer, unsigned & storedCrc)
{
StringBuffer s(ifile->queryFilename());
s.append(".crc");
Owned<IFile> crcFile = createIFile(s.str());
size32_t crcSz = (size32_t)crcFile->size();
Owned<IFileIO> crcIO = crcFile->open(IFOread);
bool performCrc = false;
timesDiffer = false;
if (crcIO)
{
Owned<IFileIOStream> crcStream = createIOStream(crcIO);
if (sizeof(storedCrc) == crcSz) // backward compat. if = in size to just crc (no date stamps)
{
verifyex(crcSz == crcStream->read(crcSz, &storedCrc));
performCrc = true;
}
else
{
size32_t sz;
verifyex(sizeof(sz) == crcStream->read(sizeof(sz), &sz));
void *mem = malloc(sz);
MemoryBuffer mb;
mb.setBuffer(sz, mem, true);
verifyex(sz == crcStream->read(sz, mem));
CDateTime storedCreateTime(mb);
CDateTime storedModifiedTime(mb);
CDateTime createTime, modifiedTime, accessedTime;
ifile->getTime(&createTime, &modifiedTime, &accessedTime);
if (!storedCreateTime.equals(createTime) || !storedModifiedTime.equals(modifiedTime))
timesDiffer = true;
else
{
mb.read(storedCrc);
performCrc = true;
}
}
}
return performCrc;
}
void unlock(SessionId owner)
{
sect.enter();
if (exclusivenest) {
exclusivenest--;
if (exclusivenest) { // still locked
assertex(owners.item(0)==owner);
sect.leave();
return;
}
}
verifyex(owners.zap(owner));
if (owners.ordinality()==0) {
exclusivenest = 0;
if (waiting) {
sem.signal(waiting);
waiting = 0;
}
}
else {
assertex(!exclusivenest);
}
sect.leave();
}
void prepareKey(IDistributedFile *index)
{
IDistributedFile *f = index;
IDistributedSuperFile *super = f->querySuperFile();
unsigned nparts = f->numParts(); // includes tlks if any, but unused in array
performPartLookup.ensure(nparts);
bool checkTLKConsistency = (nullptr != super) && !localKey && (0 != (TIRsorted & indexBaseHelper->getFlags()));
if (nofilter)
{
while (nparts--) performPartLookup.append(true);
if (!checkTLKConsistency) return;
}
else
{
while (nparts--) performPartLookup.append(false); // parts to perform lookup set later
}
Owned<IDistributedFileIterator> iter;
if (super)
{
iter.setown(super->getSubFileIterator(true));
verifyex(iter->first());
f = &iter->query();
}
unsigned width = f->numParts();
if (!localKey)
--width;
assertex(width);
unsigned tlkCrc = 0;
bool first = true;
unsigned superSubIndex=0;
bool fileCrc = false, rowCrc = false;
for (;;)
{
Owned<IDistributedFilePart> part = f->getPart(width);
if (checkTLKConsistency)
{
unsigned _tlkCrc;
if (part->getCrc(_tlkCrc))
fileCrc = true;
else if (part->queryAttributes().hasProp("@crc")) // NB: key "@crc" is not a crc on the file, but data within.
{
_tlkCrc = part->queryAttributes().getPropInt("@crc");
rowCrc = true;
}
else if (part->queryAttributes().hasProp("@tlkCrc")) // backward compat.
{
_tlkCrc = part->queryAttributes().getPropInt("@tlkCrc");
rowCrc = true;
}
else
{
if (rowCrc || fileCrc)
{
checkTLKConsistency = false;
Owned<IException> e = MakeActivityWarning(&container, 0, "Cannot validate that tlks in superfile %s match, some crc attributes are missing", super->queryLogicalName());
queryJobChannel().fireException(e);
}
}
if (rowCrc && fileCrc)
{
checkTLKConsistency = false;
Owned<IException> e = MakeActivityWarning(&container, 0, "Cannot validate that tlks in superfile %s match, due to mixed crc types.", super->queryLogicalName());
queryJobChannel().fireException(e);
}
if (checkTLKConsistency)
{
if (first)
{
tlkCrc = _tlkCrc;
first = false;
}
else if (tlkCrc != _tlkCrc)
throw MakeActivityException(this, 0, "Sorted output on super files comprising of non coparitioned sub keys is not supported (TLK's do not match)");
}
}
if (!nofilter)
{
Owned<IKeyIndex> keyIndex;
unsigned copy;
for (copy=0; copy<part->numCopies(); copy++)
{
RemoteFilename rfn;
OwnedIFile ifile = createIFile(part->getFilename(rfn,copy));
if (ifile->exists())
{
StringBuffer remotePath;
rfn.getRemotePath(remotePath);
unsigned crc = 0;
part->getCrc(crc);
keyIndex.setown(createKeyIndex(remotePath.str(), crc, false, false));
break;
}
}
if (!keyIndex)
throw MakeThorException(TE_FileNotFound, "Top level key part does not exist, for key: %s", index->queryLogicalName());
unsigned fixedSize = indexBaseHelper->queryDiskRecordSize()->querySerializedDiskMeta()->getFixedSize(); // used only if fixed
Owned <IKeyManager> tlk = createLocalKeyManager(keyIndex, fixedSize, NULL);
indexBaseHelper->createSegmentMonitors(tlk);
tlk->finishSegmentMonitors();
tlk->reset();
while (tlk->lookup(false))
{
if (tlk->queryFpos())
performPartLookup.replace(true, (aindex_t)(super?super->numSubFiles(true)*(tlk->queryFpos()-1)+superSubIndex:tlk->queryFpos()-1));
}
}
if (!super||!iter->next())
break;
superSubIndex++;
f = &iter->query();
if (width != f->numParts()-1)
throw MakeActivityException(this, 0, "Super key %s, with mixture of sub key width are not supported.", f->queryLogicalName());
}
}