/**
* Processes unlock request.
*
* @param nodeId Sender node ID.
* @param req Unlock request.
*/
@SuppressWarnings({"unchecked"})
private void processUnlockRequest(UUID nodeId, GridDistributedUnlockRequest req) {
assert nodeId != null;
try {
ClassLoader ldr = ctx.deploy().globalLoader();
List<byte[]> keys = req.keyBytes();
for (byte[] keyBytes : keys) {
K key = (K) U.unmarshal(ctx.marshaller(), new ByteArrayInputStream(keyBytes), ldr);
while (true) {
boolean created = false;
GridDistributedCacheEntry<K, V> entry = peekexx(key);
if (entry == null) {
entry = entryexx(key);
created = true;
}
try {
entry.doneRemote(
req.version(), req.version(), req.committedVersions(), req.rolledbackVersions());
// Note that we don't reorder completed versions here,
// as there is no point to reorder relative to the version
// we are about to remove.
if (entry.removeLock(req.version())) {
if (log.isDebugEnabled())
log.debug("Removed lock [lockId=" + req.version() + ", key=" + key + ']');
if (created && entry.markObsolete(req.version())) removeIfObsolete(entry.key());
} else if (log.isDebugEnabled())
log.debug(
"Received unlock request for unknown candidate "
+ "(added to cancelled locks set): "
+ req);
break;
} catch (GridCacheEntryRemovedException ignored) {
if (log.isDebugEnabled())
log.debug(
"Received remove lock request for removed entry (will retry) [entry="
+ entry
+ ", req="
+ req
+ ']');
}
}
}
} catch (GridException e) {
U.error(log, "Failed to unmarshal unlock key (unlock will not be performed): " + req, e);
}
}
/**
* Removes locks regardless of whether they are owned or not for given version and keys.
*
* @param ver Lock version.
* @param keys Keys.
*/
@SuppressWarnings({"unchecked"})
public void removeLocks(GridCacheVersion ver, Collection<? extends K> keys) {
if (keys.isEmpty()) return;
Collection<GridRichNode> nodes = ctx.remoteNodes(keys);
try {
// Send request to remove from remote nodes.
GridDistributedUnlockRequest<K, V> req = new GridDistributedUnlockRequest<K, V>(keys.size());
req.version(ver);
for (K key : keys) {
while (true) {
GridDistributedCacheEntry<K, V> entry = peekexx(key);
try {
if (entry != null) {
GridCacheMvccCandidate<K> cand = entry.candidate(ver);
if (cand != null) {
// Remove candidate from local node first.
if (entry.removeLock(cand.version())) {
// If there is only local node in this lock's topology,
// then there is no reason to distribute the request.
if (nodes.isEmpty()) continue;
req.addKey(entry.key(), entry.getOrMarshalKeyBytes(), ctx);
}
}
}
break;
} catch (GridCacheEntryRemovedException ignored) {
if (log.isDebugEnabled())
log.debug(
"Attempted to remove lock from removed entry (will retry) [rmvVer="
+ ver
+ ", entry="
+ entry
+ ']');
}
}
}
if (nodes.isEmpty()) return;
req.completedVersions(ctx.tm().committedVersions(ver), ctx.tm().rolledbackVersions(ver));
if (!req.keyBytes().isEmpty())
// We don't wait for reply to this message.
ctx.io().safeSend(nodes, req, null);
} catch (GridException ex) {
U.error(log, "Failed to unlock the lock for keys: " + keys, ex);
}
}
/**
* Removes locks regardless of whether they are owned or not for given version and keys.
*
* @param ver Lock version.
* @param keys Keys.
*/
@SuppressWarnings({"unchecked"})
public void removeLocks(GridCacheVersion ver, Collection<? extends K> keys) {
if (keys.isEmpty()) return;
try {
Collection<GridRichNode> affNodes = null;
int keyCnt = -1;
Map<GridNode, GridNearUnlockRequest<K, V>> map = null;
for (K key : keys) {
// Send request to remove from remote nodes.
GridNearUnlockRequest<K, V> req = null;
while (true) {
GridDistributedCacheEntry<K, V> entry = peekExx(key);
try {
if (entry != null) {
GridCacheMvccCandidate<K> cand = entry.candidate(ver);
if (cand != null) {
if (affNodes == null) {
affNodes = CU.allNodes(ctx, cand.topologyVersion());
keyCnt = (int) Math.ceil((double) keys.size() / affNodes.size());
map = new HashMap<GridNode, GridNearUnlockRequest<K, V>>(affNodes.size());
}
GridRichNode primary = CU.primary0(ctx.affinity(key, affNodes));
if (!primary.isLocal()) {
req = map.get(primary);
if (req == null) {
map.put(primary, req = new GridNearUnlockRequest<K, V>(keyCnt));
req.version(ver);
}
}
// Remove candidate from local node first.
if (entry.removeLock(cand.version())) {
if (primary.isLocal()) {
dht.removeLocks(primary.id(), ver, F.asList(key), true);
assert req == null;
continue;
}
req.addKey(entry.key(), entry.getOrMarshalKeyBytes(), ctx);
}
}
}
break;
} catch (GridCacheEntryRemovedException ignored) {
if (log.isDebugEnabled())
log.debug(
"Attempted to remove lock from removed entry (will retry) [rmvVer="
+ ver
+ ", entry="
+ entry
+ ']');
}
}
}
if (map == null || map.isEmpty()) return;
Collection<GridCacheVersion> committed = ctx.tm().committedVersions(ver);
Collection<GridCacheVersion> rolledback = ctx.tm().rolledbackVersions(ver);
for (Map.Entry<GridNode, GridNearUnlockRequest<K, V>> mapping : map.entrySet()) {
GridNode n = mapping.getKey();
GridDistributedUnlockRequest<K, V> req = mapping.getValue();
if (!req.keyBytes().isEmpty()) {
req.completedVersions(committed, rolledback);
// We don't wait for reply to this message.
ctx.io().send(n, req);
}
}
} catch (GridException ex) {
U.error(log, "Failed to unlock the lock for keys: " + keys, ex);
}
}
/** {@inheritDoc} */
@Override
public void unlockAll(
Collection<? extends K> keys, GridPredicate<? super GridCacheEntry<K, V>>[] filter) {
if (keys.isEmpty()) return;
try {
GridCacheVersion ver = null;
Collection<GridRichNode> affNodes = null;
int keyCnt = -1;
Map<GridRichNode, GridNearUnlockRequest<K, V>> map = null;
Collection<K> locKeys = new LinkedList<K>();
GridCacheVersion obsoleteVer = ctx.versions().next();
for (K key : keys) {
while (true) {
GridDistributedCacheEntry<K, V> entry = peekExx(key);
if (entry == null || !ctx.isAll(entry.wrap(false), filter)) break; // While.
try {
GridCacheMvccCandidate<K> cand =
entry.candidate(ctx.nodeId(), Thread.currentThread().getId());
if (cand != null) {
ver = cand.version();
if (affNodes == null) {
affNodes = CU.allNodes(ctx, cand.topologyVersion());
keyCnt = (int) Math.ceil((double) keys.size() / affNodes.size());
map = new HashMap<GridRichNode, GridNearUnlockRequest<K, V>>(affNodes.size());
}
// Send request to remove from remote nodes.
GridRichNode primary = CU.primary0(ctx.affinity(key, affNodes));
GridNearUnlockRequest<K, V> req = map.get(primary);
if (req == null) {
map.put(primary, req = new GridNearUnlockRequest<K, V>(keyCnt));
req.version(ver);
}
// Remove candidate from local node first.
GridCacheMvccCandidate<K> rmv = entry.removeLock();
if (rmv != null) {
if (!rmv.reentry()) {
if (ver != null && !ver.equals(rmv.version()))
throw new GridException(
"Failed to unlock (if keys were locked separately, "
+ "then they need to be unlocked separately): "
+ keys);
if (!primary.isLocal()) {
assert req != null;
req.addKey(entry.key(), entry.getOrMarshalKeyBytes(), ctx);
} else locKeys.add(key);
if (log.isDebugEnabled()) log.debug("Removed lock (will distribute): " + rmv);
} else if (log.isDebugEnabled())
log.debug(
"Current thread still owns lock (or there are no other nodes)"
+ " [lock="
+ rmv
+ ", curThreadId="
+ Thread.currentThread().getId()
+ ']');
}
// Try to evict near entry if it's dht-mapped locally.
evictNearEntry(entry, obsoleteVer);
}
break;
} catch (GridCacheEntryRemovedException ignore) {
if (log.isDebugEnabled())
log.debug("Attempted to unlock removed entry (will retry): " + entry);
}
}
}
if (ver == null) return;
for (Map.Entry<GridRichNode, GridNearUnlockRequest<K, V>> mapping : map.entrySet()) {
GridRichNode n = mapping.getKey();
GridDistributedUnlockRequest<K, V> req = mapping.getValue();
if (n.isLocal()) dht.removeLocks(ctx.nodeId(), req.version(), locKeys, true);
else if (!req.keyBytes().isEmpty())
// We don't wait for reply to this message.
ctx.io().send(n, req);
}
} catch (GridException ex) {
U.error(log, "Failed to unlock the lock for keys: " + keys, ex);
}
}
/**
* @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> startRemoteTxForFinish(
UUID nodeId, GridDhtTxFinishRequest<K, V> req)
throws GridException, GridDistributedLockCancelledException {
GridNearTxRemote<K, V> tx = null;
ClassLoader ldr = ctx.deploy().globalLoader();
if (ldr != null) {
for (GridCacheTxEntry<K, V> txEntry : req.nearWrites()) {
GridDistributedCacheEntry<K, V> entry = null;
while (true) {
try {
entry = peekExx(txEntry.key());
if (entry != null) {
entry.keyBytes(txEntry.keyBytes());
// Handle implicit locks for pessimistic transactions.
tx = ctx.tm().tx(req.version());
if (tx != null) {
if (tx.local()) return null;
if (tx.markFinalizing()) tx.addWrite(txEntry.key(), txEntry.keyBytes());
else return null;
} else {
tx =
new GridNearTxRemote<K, V>(
nodeId,
req.nearNodeId(),
req.threadId(),
req.version(),
null,
PESSIMISTIC,
req.isolation(),
req.isInvalidate(),
0,
txEntry.key(),
txEntry.keyBytes(),
txEntry.value(),
txEntry.valueBytes(),
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());
if (!tx.markFinalizing()) return null;
}
// Add remote candidate before reordering.
if (txEntry.explicitVersion() == null)
entry.addRemote(
req.nearNodeId(),
nodeId,
req.threadId(),
req.version(),
0,
tx.ec(),
/*tx*/ true,
tx.implicitSingle());
// Remote candidates for ordered lock queuing.
entry.addRemoteCandidates(
Collections.<GridCacheMvccCandidate<K>>emptyList(),
req.version(),
req.committedVersions(),
req.rolledbackVersions());
}
// Double-check in case if sender node left the grid.
if (ctx.discovery().node(req.nearNodeId()) == 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;
}
/** {@inheritDoc} */
@SuppressWarnings({"unchecked"})
@Override
public void unlockAll(
Collection<? extends K> keys, GridPredicate<? super GridCacheEntry<K, V>>[] filter) {
if (keys == null || keys.isEmpty()) return;
Collection<? extends GridNode> nodes = ctx.remoteNodes(keys);
try {
GridDistributedUnlockRequest<K, V> req = new GridDistributedUnlockRequest<K, V>(keys.size());
for (K key : keys) {
GridDistributedCacheEntry<K, V> entry = entryexx(key);
if (!ctx.isAll(entry.wrap(false), filter)) continue;
// Unlock local lock first.
GridCacheMvccCandidate<K> rmv = entry.removeLock();
if (rmv != null && !nodes.isEmpty()) {
if (!rmv.reentry()) {
req.addKey(entry.key(), entry.getOrMarshalKeyBytes(), ctx);
// We are assuming that lock ID is the same for all keys.
req.version(rmv.version());
if (log.isDebugEnabled()) log.debug("Removed lock (will distribute): " + rmv);
} else {
if (log.isDebugEnabled())
log.debug(
"Locally unlocked lock reentry without distributing to other nodes [removed="
+ rmv
+ ", entry="
+ entry
+ ']');
}
} else {
if (log.isDebugEnabled())
log.debug(
"Current thread still owns lock (or there are no other nodes) [lock="
+ rmv
+ ", curThreadId="
+ Thread.currentThread().getId()
+ ']');
}
}
// Don't proceed of no keys to unlock.
if (req.keyBytes().isEmpty()) {
if (log.isDebugEnabled())
log.debug("No keys to unlock locally (was it reentry unlock?): " + keys);
return;
}
// We don't wait for reply to this message. Receiving side will have
// to make sure that unlock requests don't come before lock requests.
ctx.io().safeSend(nodes, req, null);
} catch (GridException e) {
U.error(log, "Failed to unlock keys: " + keys, e);
}
}
/**
* Processes lock request.
*
* @param nodeId Sender node ID.
* @param msg Lock request.
*/
@SuppressWarnings({"unchecked", "ThrowableInstanceNeverThrown"})
private void processLockRequest(UUID nodeId, GridDistributedLockRequest<K, V> msg) {
assert !nodeId.equals(locNodeId);
List<byte[]> keys = msg.keyBytes();
int cnt = keys.size();
GridReplicatedTxRemote<K, V> tx = null;
GridDistributedLockResponse res;
ClassLoader ldr = null;
try {
ldr = ctx.deploy().globalLoader();
if (ldr != null) {
res = new GridDistributedLockResponse(msg.version(), msg.futureId(), cnt);
for (int i = 0; i < keys.size(); i++) {
byte[] bytes = keys.get(i);
K key = msg.keys().get(i);
Collection<GridCacheMvccCandidate<K>> cands = msg.candidatesByIndex(i);
if (bytes == null) continue;
if (log.isDebugEnabled()) log.debug("Unmarshalled key: " + key);
GridDistributedCacheEntry<K, V> entry = null;
while (true) {
try {
entry = entryexx(key);
// Handle implicit locks for pessimistic transactions.
if (msg.inTx()) {
tx = ctx.tm().tx(msg.version());
if (tx != null) {
if (msg.txRead()) tx.addRead(key, bytes);
else tx.addWrite(key, bytes);
} else {
tx =
new GridReplicatedTxRemote<K, V>(
nodeId,
msg.threadId(),
msg.version(),
null,
PESSIMISTIC,
msg.isolation(),
msg.isInvalidate(),
msg.timeout(),
key,
bytes,
msg.txRead(),
ctx);
tx = ctx.tm().onCreated(tx);
if (tx == null || !ctx.tm().onStarted(tx))
throw new GridCacheTxRollbackException(
"Failed to acquire lock "
+ "(transaction has been completed): "
+ msg.version());
}
}
// Add remote candidate before reordering.
entry.addRemote(
msg.nodeId(),
null,
msg.threadId(),
msg.version(),
msg.timeout(),
tx != null && tx.ec(),
tx != null,
tx != null && tx.implicitSingle());
// Remote candidates for ordered lock queuing.
entry.addRemoteCandidates(
cands, msg.version(), msg.committedVersions(), msg.rolledbackVersions());
// Double-check in case if sender node left the grid.
if (ctx.discovery().node(msg.nodeId()) == null) {
if (log.isDebugEnabled())
log.debug(
"Node requesting lock left grid (lock request will be ignored): " + msg);
if (tx != null) tx.rollback();
return;
}
res.setCandidates(
i,
entry.localCandidates(),
ctx.tm().committedVersions(msg.version()),
ctx.tm().rolledbackVersions(msg.version()));
res.addValueBytes(
entry.rawGet(), msg.returnValue(i) ? entry.valueBytes(null) : null, ctx);
// 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 for message: " + msg;
U.warn(log, err);
res =
new GridDistributedLockResponse(msg.version(), msg.futureId(), new GridException(err));
}
} catch (GridCacheTxRollbackException e) {
if (log.isDebugEnabled())
log.debug("Received lock request for completed transaction (will ignore): " + e);
res = new GridDistributedLockResponse(msg.version(), msg.futureId(), e);
} catch (GridException e) {
String err = "Failed to unmarshal at least one of the keys for lock request message: " + msg;
log.error(err, e);
res =
new GridDistributedLockResponse(msg.version(), msg.futureId(), new GridException(err, e));
if (tx != null) tx.rollback();
} catch (GridDistributedLockCancelledException ignored) {
// Received lock request for cancelled lock.
if (log.isDebugEnabled())
log.debug("Received lock request for canceled lock (will ignore): " + msg);
if (tx != null) tx.rollback();
// Don't send response back.
return;
}
GridNode node = ctx.discovery().node(msg.nodeId());
boolean releaseAll = false;
if (node != null) {
try {
// Reply back to sender.
ctx.io().send(node, res);
} catch (GridException e) {
U.error(log, "Failed to send message to node (did the node leave grid?): " + node.id(), e);
releaseAll = ldr != null;
}
}
// If sender left grid, release all locks acquired so far.
else releaseAll = ldr != null;
// Release all locks because sender node left grid.
if (releaseAll) {
for (K key : msg.keys()) {
while (true) {
GridDistributedCacheEntry<K, V> entry = peekexx(key);
try {
if (entry != null) entry.removeExplicitNodeLocks(msg.nodeId());
break;
} catch (GridCacheEntryRemovedException ignore) {
if (log.isDebugEnabled())
log.debug(
"Attempted to remove lock on removed entity during failure "
+ "of replicated lock request handling (will retry): "
+ entry);
}
}
}
U.warn(
log, "Sender node left grid in the midst of lock acquisition (locks will be released).");
}
}