@Override
protected void removeApplicationStateInternal(ApplicationStateData appState) throws IOException {
ApplicationId appId = appState.getApplicationSubmissionContext().getApplicationId();
String appKey = getApplicationNodeKey(appId);
try {
WriteBatch batch = db.createWriteBatch();
try {
batch.delete(bytes(appKey));
for (ApplicationAttemptId attemptId : appState.attempts.keySet()) {
String attemptKey = getApplicationAttemptNodeKey(appKey, attemptId);
batch.delete(bytes(attemptKey));
}
if (LOG.isDebugEnabled()) {
LOG.debug(
"Removing state for app "
+ appId
+ " and "
+ appState.attempts.size()
+ " attempts"
+ " at "
+ appKey);
}
db.write(batch);
} finally {
batch.close();
}
} catch (DBException e) {
throw new IOException(e);
}
}
@Override
public synchronized void mutate(Mutations mutations, boolean sync) {
Preconditions.checkArgument(mutations != null, "null mutations");
Preconditions.checkState(this.db != null, "closed");
// Apply mutations in a batch
try (WriteBatch batch = this.db.createWriteBatch()) {
// Apply removes
final ReadOptions iteratorOptions =
new ReadOptions().verifyChecksums(this.options.verifyChecksums()).fillCache(false);
for (KeyRange range : mutations.getRemoveRanges()) {
final byte[] min = range.getMin();
final byte[] max = range.getMax();
if (min != null && max != null && ByteUtil.isConsecutive(min, max)) batch.delete(min);
else {
try (LevelDBKVStore.Iterator i =
this.kv.createIterator(iteratorOptions, min, max, false)) {
while (i.hasNext()) batch.delete(i.next().getKey());
}
}
}
// Apply puts
for (Map.Entry<byte[], byte[]> entry : mutations.getPutPairs())
batch.put(entry.getKey(), entry.getValue());
// Convert counter adjustments into puts
final Function<Map.Entry<byte[], Long>, Map.Entry<byte[], byte[]>> counterPutFunction =
new Function<Map.Entry<byte[], Long>, Map.Entry<byte[], byte[]>>() {
@Override
public Map.Entry<byte[], byte[]> apply(Map.Entry<byte[], Long> adjust) {
// Decode old value
final byte[] key = adjust.getKey();
final long diff = adjust.getValue();
byte[] oldBytes = LevelDBAtomicKVStore.this.kv.get(key);
if (oldBytes == null) oldBytes = new byte[8];
final long oldValue;
try {
oldValue = LevelDBAtomicKVStore.this.kv.decodeCounter(oldBytes);
} catch (IllegalArgumentException e) {
return null;
}
// Add adjustment and re-encode it
return new AbstractMap.SimpleEntry<byte[], byte[]>(
key, LevelDBAtomicKVStore.this.kv.encodeCounter(oldValue + diff));
}
};
// Apply counter adjustments
for (Map.Entry<byte[], byte[]> entry :
Iterables.transform(mutations.getAdjustPairs(), counterPutFunction)) {
if (entry != null) batch.put(entry.getKey(), entry.getValue());
}
// Write the batch
this.db.write(batch, new WriteOptions().sync(sync));
} catch (IOException e) {
throw new DBException("error applying changes to LevelDB", e);
}
}