/**
* Remove particular entry from the TRASH directory.
*
* @param name Entry name.
* @param id Entry ID.
* @return {@code True} in case the entry really was deleted form the file system by this call.
* @throws IgniteCheckedException If failed.
*/
private boolean delete(String name, IgniteUuid id) throws IgniteCheckedException {
assert name != null;
assert id != null;
while (true) {
IgfsFileInfo info = meta.info(id);
if (info != null) {
if (info.isDirectory()) {
deleteDirectory(TRASH_ID, id);
if (meta.delete(TRASH_ID, name, id)) return true;
} else {
assert info.isFile();
// Delete file content first.
// In case this node crashes, other node will re-delete the file.
data.delete(info).get();
boolean ret = meta.delete(TRASH_ID, name, id);
if (evts.isRecordable(EVT_IGFS_FILE_PURGED)) {
if (info.path() != null)
evts.record(
new IgfsEvent(
info.path(),
igfsCtx.kernalContext().discovery().localNode(),
EVT_IGFS_FILE_PURGED));
else LT.warn(log, null, "Removing file without path info: " + info);
}
return ret;
}
} else return false; // Entry was deleted concurrently.
}
}
/**
* Remove particular entry from the trash directory or subdirectory.
*
* @param parentId Parent ID.
* @param id Entry id.
* @throws IgniteCheckedException If delete failed for some reason.
*/
private void deleteDirectory(IgniteUuid parentId, IgniteUuid id) throws IgniteCheckedException {
assert parentId != null;
assert id != null;
while (true) {
IgfsFileInfo info = meta.info(id);
if (info != null) {
assert info.isDirectory();
Map<String, IgfsListingEntry> listing = info.listing();
if (listing.isEmpty()) return; // Directory is empty.
Map<String, IgfsListingEntry> delListing;
if (listing.size() <= MAX_DELETE_BATCH) delListing = listing;
else {
delListing = new HashMap<>(MAX_DELETE_BATCH, 1.0f);
int i = 0;
for (Map.Entry<String, IgfsListingEntry> entry : listing.entrySet()) {
delListing.put(entry.getKey(), entry.getValue());
if (++i == MAX_DELETE_BATCH) break;
}
}
GridCompoundFuture<Object, ?> fut = new GridCompoundFuture<>();
// Delegate to child folders.
for (IgfsListingEntry entry : delListing.values()) {
if (!cancelled) {
if (entry.isDirectory()) deleteDirectory(id, entry.fileId());
else {
IgfsFileInfo fileInfo = meta.info(entry.fileId());
if (fileInfo != null) {
assert fileInfo.isFile();
fut.add(data.delete(fileInfo));
}
}
} else return;
}
fut.markInitialized();
// Wait for data cache to delete values before clearing meta cache.
try {
fut.get();
} catch (IgniteFutureCancelledCheckedException ignore) {
// This future can be cancelled only due to IGFS shutdown.
cancelled = true;
return;
}
// Actual delete of folder content.
Collection<IgniteUuid> delIds = meta.delete(id, delListing);
if (delListing == listing && delListing.size() == delIds.size())
break; // All entries were deleted.
} else break; // Entry was deleted concurrently.
}
}