/** {@inheritDoc} */
@Override
public GridCacheEntryEx<K, V> entryEx(K key) {
GridNearCacheEntry<K, V> entry = null;
while (true) {
try {
entry = (GridNearCacheEntry<K, V>) super.entryEx(key);
entry.initializeFromDht();
return entry;
} catch (GridCacheEntryRemovedException ignore) {
if (log.isDebugEnabled())
log.debug(
"Got removed near entry while initializing from DHT entry (will retry): " + entry);
}
}
}
/**
* @param nodeId Primary node ID.
* @param req Request.
* @return Remote transaction.
* @throws GridException If failed.
* @throws GridDistributedLockCancelledException If lock has been cancelled.
*/
@SuppressWarnings({"RedundantTypeArguments"})
@Nullable
public GridNearTxRemote<K, V> startRemoteTx(UUID nodeId, GridDhtLockRequest<K, V> req)
throws GridException, GridDistributedLockCancelledException {
List<byte[]> nearKeyBytes = req.nearKeyBytes();
GridNearTxRemote<K, V> tx = null;
ClassLoader ldr = ctx.deploy().globalLoader();
if (ldr != null) {
for (int i = 0; i < nearKeyBytes.size(); i++) {
byte[] bytes = nearKeyBytes.get(i);
if (bytes == null) continue;
K key = req.nearKeys().get(i);
Collection<GridCacheMvccCandidate<K>> cands = req.candidatesByIndex(i);
if (log.isDebugEnabled()) log.debug("Unmarshalled key: " + key);
GridNearCacheEntry<K, V> entry = null;
while (true) {
try {
entry = peekExx(key);
if (entry != null) {
entry.keyBytes(bytes);
// Handle implicit locks for pessimistic transactions.
if (req.inTx()) {
tx = ctx.tm().tx(req.version());
if (tx != null) tx.addWrite(key, bytes, null /*Value.*/, null /*Value bytes.*/);
else {
tx =
new GridNearTxRemote<K, V>(
nodeId,
req.nearNodeId(),
req.threadId(),
req.version(),
null,
PESSIMISTIC,
req.isolation(),
req.isInvalidate(),
req.timeout(),
key,
bytes,
null, // Value.
null, // Value bytes.
ctx);
if (tx.empty()) return tx;
tx = ctx.tm().onCreated(tx);
if (tx == null || !ctx.tm().onStarted(tx))
throw new GridCacheTxRollbackException(
"Failed to acquire lock "
+ "(transaction has been completed): "
+ req.version());
}
}
// Add remote candidate before reordering.
entry.addRemote(
req.nodeId(),
nodeId,
req.threadId(),
req.version(),
req.timeout(),
tx != null && tx.ec(),
tx != null,
tx != null && tx.implicitSingle());
// Remote candidates for ordered lock queuing.
entry.addRemoteCandidates(
cands, req.version(), req.committedVersions(), req.rolledbackVersions());
entry.orderOwned(req.version(), req.owned(entry.key()));
}
// Double-check in case if sender node left the grid.
if (ctx.discovery().node(req.nodeId()) == null) {
if (log.isDebugEnabled())
log.debug("Node requesting lock left grid (lock request will be ignored): " + req);
if (tx != null) tx.rollback();
return null;
}
// Entry is legit.
break;
} catch (GridCacheEntryRemovedException ignored) {
assert entry.obsoleteVersion() != null
: "Obsolete flag not set on removed entry: " + entry;
if (log.isDebugEnabled())
log.debug("Received entry removed exception (will retry on renewed entry): " + entry);
if (tx != null) {
tx.clearEntry(entry.key());
if (log.isDebugEnabled())
log.debug(
"Cleared removed entry from remote transaction (will retry) [entry="
+ entry
+ ", tx="
+ tx
+ ']');
}
}
}
}
} else {
String err = "Failed to acquire deployment class loader for message: " + req;
U.warn(log, err);
throw new GridException(err);
}
return tx;
}