void TransactionalRAMDirectory::transAbort()
{
if (!transOpen)
_CLTHROWA(CL_ERR_RAMTransaction, "There is no open transaction.");
// Delete each file in filesToRemoveOnAbort.
FilenameSet::const_iterator itrDel = filesToRemoveOnAbort.begin();
for ( ; itrDel != filesToRemoveOnAbort.end(); ++itrDel) {
size_t nameLength = itrDel->first.length();
// Special exception: Refrain from deleting a lock's flag file, as that
// would interfere with the operation of the lock.
if (!(nameLength >= 5
&& itrDel->first.rightRef(5) == QLatin1String(".lock"))) {
RAMDirectory::deleteFile(itrDel->first);
}
}
// Ownership of the memory of both the key and the value never left files,
// so there's no need for a special directive to filesToRemoveOnAbort.
filesToRemoveOnAbort.clear();
// Now that any new-since-trans-start files with the same names as
// already-present-at-trans-start files are out of the way, restore each
// file in filesToRestoreOnAbort.
TransFileMap::const_iterator itr = filesToRestoreOnAbort.begin();
for ( ; itr != filesToRestoreOnAbort.end(); ++itr) {
files.put(itr->first, itr->second);
filesToRestoreOnAbort.remove(itr->first);
}
CND_CONDITION(filesToRestoreOnAbort.size() == 0,
"filesToRestoreOnAbort should be empty.");
transResolved();
}
void TransactionalRAMDirectory::transCommit() {
if (!transOpen) {
_CLTHROWA(CL_ERR_RAMTransaction,"There is no open transaction.");
}
// All storage is in memory, so commit is ultra-simple.
transResolved();
}
void TransactionalRAMDirectory::transAbort() {
if (!transOpen) {
_CLTHROWA(CL_ERR_RAMTransaction,"There is no open transaction.");
}
// Delete each file in filesToRemoveOnAbort.
for (FilenameSet::const_iterator itrDel = filesToRemoveOnAbort.begin();
itrDel != filesToRemoveOnAbort.end();
++itrDel
)
{
const char* name = itrDel->first;
size_t nameLength = strlen(name);
// Special exception:
// Refrain from deleting a lock's flag file, as that would interfere with
// the operation of the lock.
if (!(nameLength >= 5 && strcmp(name + nameLength - 5, ".lock"))) {
RAMDirectory::deleteFile(name);
}
}
// Ownership of the memory of both the key and the value never left files,
// so there's no need for a special directive to filesToRemoveOnAbort.
filesToRemoveOnAbort.clear();
// Now that any new-since-trans-start files with the same names as
// already-present-at-trans-start files are out of the way, restore each
// file in filesToRestoreOnAbort.
AStringArrayConst removeTheseWithoutDeletingMem;
for (TransFileMap::const_iterator itr = filesToRestoreOnAbort.begin();
itr != filesToRestoreOnAbort.end();
++itr
)
{
const char* name = itr->first;
files.put(name, itr->second);
// We've just transferred ownership of the memory of both the key and the
// value to files; we must now direct filesToRestoreOnAbort not to delete
// that memory as it removes the entry. This is performed in a separate
// loop to avoid modifying filesToRestoreOnAbort while iterating over it.
removeTheseWithoutDeletingMem.push_back(name);
}
for (AStringArrayConst::iterator itrRem = removeTheseWithoutDeletingMem.begin();
itrRem != removeTheseWithoutDeletingMem.end();
++itrRem
)
{
filesToRestoreOnAbort.remove(*itrRem); //remove iterator
}
CND_CONDITION(filesToRestoreOnAbort.size() == 0, "filesToRestoreOnAbort should be empty.");
transResolved();
}
