/**
* 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);
}
}
/**
* @param nodeId Sender node ID.
* @param msg Response to prepare request.
*/
private void processPrepareResponse(UUID nodeId, GridDistributedTxPrepareResponse<K, V> msg) {
assert nodeId != null;
assert msg != null;
GridReplicatedTxLocal<K, V> tx = ctx.tm().tx(msg.version());
if (tx == null) {
if (log.isDebugEnabled())
log.debug(
"Received prepare response for non-existing transaction [senderNodeId="
+ nodeId
+ ", res="
+ msg
+ ']');
return;
}
GridReplicatedTxPrepareFuture<K, V> future = (GridReplicatedTxPrepareFuture<K, V>) tx.future();
if (future != null) future.onResult(nodeId, msg);
else
U.error(
log,
"Received prepare response for transaction with no future [res="
+ msg
+ ", tx="
+ tx
+ ']');
}
/**
* @param nodeId Sender node ID.
* @param msg Finish transaction response.
*/
private void processFinishResponse(UUID nodeId, GridDistributedTxFinishResponse<K, V> msg) {
GridReplicatedTxCommitFuture<K, V> fut =
(GridReplicatedTxCommitFuture<K, V>)
ctx.mvcc().<GridCacheTx>future(msg.xid().id(), msg.futureId());
if (fut != null) fut.onResult(nodeId);
else U.warn(log, "Received finish response for unknown transaction: " + msg);
}
/**
* Reconstructs object on demarshalling.
*
* @return Reconstructed object.
* @throws ObjectStreamException Thrown in case of demarshalling error.
*/
private Object readResolve() throws ObjectStreamException {
GridTuple2<GridCacheContext, String> t = stash.get();
try {
return t.get1().dataStructures().sequence(t.get2(), 0L, false, false);
} catch (GridException e) {
throw U.withCause(new InvalidObjectException(e.getMessage()), 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);
}
}
/**
* Reconstructs object on demarshalling.
*
* @return Reconstructed object.
* @throws ObjectStreamException Thrown in case of demarshalling error.
*/
@SuppressWarnings({"ConstantConditions"})
private Object readResolve() throws ObjectStreamException {
GridTuple2<GridCacheContext, String> t = stash.get();
try {
return t.get1().dataStructures().countDownLatch(t.get2(), 0, false, false);
} catch (GridException e) {
throw U.withCause(new InvalidObjectException(e.getMessage()), e);
}
}
/**
* Reconstructs object on demarshalling.
*
* @return Reconstructed object.
* @throws ObjectStreamException Thrown in case of demarshalling error.
*/
@SuppressWarnings("unchecked")
private Object readResolve() throws ObjectStreamException {
try {
GridBiTuple<GridCacheContext, String> t = stash.get();
return t.get1().dataStructures().atomicReference(t.get2(), null, false);
} catch (GridException e) {
throw U.withCause(new InvalidObjectException(e.getMessage()), e);
} finally {
stash.remove();
}
}
/**
* Processes lock response.
*
* @param nodeId Sender node ID.
* @param res Lock response.
*/
private void processLockResponse(UUID nodeId, GridDistributedLockResponse<K, V> res) {
GridReplicatedLockFuture<K, V> fut = futurex(res.lockId(), res.futureId());
if (fut == null) {
U.warn(log, "Received lock response for non-existing future (will ignore): " + res);
} else {
fut.onResult(nodeId, res);
if (fut.isDone()) {
ctx.mvcc().removeFuture(fut);
if (log.isDebugEnabled())
log.debug("Received all replies for future (future was removed): " + fut);
}
}
}
/** {@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);
}
}
/** {@inheritDoc} */
@SuppressWarnings({"unchecked", "ThrowableInstanceNeverThrown"})
@Override
protected GridFuture<Boolean> lockAllAsync(
Collection<? extends K> keys,
long timeout,
GridCacheTxLocalEx<K, V> tx,
boolean isInvalidate,
boolean isRead,
boolean retval,
GridCacheTxIsolation isolation,
GridPredicate<? super GridCacheEntry<K, V>>[] filter) {
if (keys.isEmpty()) return new GridFinishedFuture<Boolean>(ctx.kernalContext(), true);
Collection<GridRichNode> nodes = ctx.remoteNodes(keys);
final GridReplicatedLockFuture<K, V> fut =
new GridReplicatedLockFuture<K, V>(ctx, keys, tx, this, nodes, timeout, filter);
GridDistributedLockRequest<K, V> req =
new GridDistributedLockRequest<K, V>(
locNodeId,
Thread.currentThread().getId(),
fut.futureId(),
fut.version(),
tx != null,
isRead,
isolation,
isInvalidate,
timeout,
keys.size());
try {
// Must add future before redying locks.
if (!ctx.mvcc().addFuture(fut))
throw new IllegalStateException("Duplicate future ID: " + fut);
boolean distribute = false;
for (K key : keys) {
while (true) {
GridDistributedCacheEntry<K, V> entry = null;
try {
entry = entryexx(key);
if (!ctx.isAll(entry.wrap(false), filter)) {
if (log.isDebugEnabled())
log.debug("Entry being locked did not pass filter (will not lock): " + entry);
fut.onDone(false);
return fut;
}
// Removed exception may be thrown here.
GridCacheMvccCandidate<K> cand = fut.addEntry(entry);
if (cand != null) {
req.addKeyBytes(
key,
cand.reentry() ? null : entry.getOrMarshalKeyBytes(),
retval,
entry.localCandidates(fut.version()),
ctx);
req.completedVersions(
ctx.tm().committedVersions(fut.version()),
ctx.tm().rolledbackVersions(fut.version()));
distribute = !cand.reentry();
} else if (fut.isDone()) return fut;
break;
} catch (GridCacheEntryRemovedException ignored) {
if (log.isDebugEnabled())
log.debug("Got removed entry in lockAsync(..) method (will retry): " + entry);
}
}
}
// If nothing to distribute at this point,
// then all locks are reentries.
if (!distribute) fut.complete(true);
if (nodes.isEmpty()) fut.readyLocks();
// No reason to send request if all locks are locally re-entered,
// or if timeout is negative and local locks could not be acquired.
if (fut.isDone()) return fut;
try {
ctx.io()
.safeSend(
fut.nodes(),
req,
new P1<GridNode>() {
@Override
public boolean apply(GridNode node) {
fut.onNodeLeft(node.id());
return !fut.isDone();
}
});
} catch (GridException e) {
U.error(
log,
"Failed to send lock request to node [nodes="
+ U.toShortString(nodes)
+ ", req="
+ req
+ ']',
e);
fut.onError(e);
}
return fut;
} catch (GridException e) {
Throwable err = new GridException("Failed to acquire asynchronous lock for keys: " + keys, e);
// Clean-up.
fut.onError(err);
ctx.mvcc().removeFuture(fut);
return fut;
}
}
/**
* @param nodeId Sender node ID.
* @param req Finish transaction message.
*/
@SuppressWarnings({"CatchGenericClass"})
private void processFinishRequest(UUID nodeId, GridDistributedTxFinishRequest<K, V> req) {
assert nodeId != null;
assert req != null;
GridReplicatedTxRemote<K, V> tx = ctx.tm().tx(req.version());
try {
ClassLoader ldr = ctx.deploy().globalLoader();
if (req.commit()) {
// If lock was acquired explicitly.
if (tx == null) {
// Create transaction and add entries.
tx =
ctx.tm()
.onCreated(
new GridReplicatedTxRemote<K, V>(
ldr,
nodeId,
req.threadId(),
req.version(),
req.commitVersion(),
PESSIMISTIC,
READ_COMMITTED,
req.isInvalidate(),
/*timeout */ 0,
/*read entries*/ null,
req.writes(),
ctx));
if (tx == null || !ctx.tm().onStarted(tx))
throw new GridCacheTxRollbackException(
"Attempt to start a completed " + "transaction: " + req);
} else {
boolean set = tx.commitVersion(req.commitVersion());
assert set;
}
Collection<GridCacheTxEntry<K, V>> writeEntries = req.writes();
if (!F.isEmpty(writeEntries)) {
// In OPTIMISTIC mode, we get the values at PREPARE stage.
assert tx.concurrency() == PESSIMISTIC;
for (GridCacheTxEntry<K, V> entry : writeEntries) {
// Unmarshal write entries.
entry.unmarshal(ctx, ldr);
if (log.isDebugEnabled())
log.debug(
"Unmarshalled transaction entry from pessimistic transaction [key="
+ entry.key()
+ ", value="
+ entry.value()
+ ", tx="
+ tx
+ ']');
if (!tx.setWriteValue(entry))
U.warn(
log,
"Received entry to commit that was not present in transaction [entry="
+ entry
+ ", tx="
+ tx
+ ']');
}
}
// Add completed versions.
tx.doneRemote(req.baseVersion(), req.committedVersions(), req.rolledbackVersions());
if (tx.pessimistic()) tx.prepare();
tx.commit();
} else if (tx != null) {
tx.doneRemote(req.baseVersion(), req.committedVersions(), req.rolledbackVersions());
tx.rollback();
}
if (req.replyRequired()) {
GridCacheMessage<K, V> res =
new GridDistributedTxFinishResponse<K, V>(req.version(), req.futureId());
try {
ctx.io().send(nodeId, res);
} catch (Throwable e) {
// Double-check.
if (ctx.discovery().node(nodeId) == null) {
if (log.isDebugEnabled())
log.debug(
"Node left while sending finish response [nodeId="
+ nodeId
+ ", res="
+ res
+ ']');
} else
U.error(
log,
"Failed to send finish response to node [nodeId=" + nodeId + ", res=" + res + ']',
e);
}
}
} catch (GridCacheTxRollbackException e) {
if (log.isDebugEnabled())
log.debug("Attempted to start a completed transaction (will ignore): " + e);
} catch (Throwable e) {
U.error(
log,
"Failed completing transaction [commit=" + req.commit() + ", tx=" + CU.txString(tx) + ']',
e);
if (tx != null) tx.rollback();
}
}
/**
* @param nodeId Sender node ID.
* @param msg Prepare request.
*/
@SuppressWarnings({"InstanceofCatchParameter"})
private void processPrepareRequest(UUID nodeId, GridDistributedTxPrepareRequest<K, V> msg) {
assert nodeId != null;
assert msg != null;
GridReplicatedTxRemote<K, V> tx = null;
GridDistributedTxPrepareResponse<K, V> res;
try {
tx =
new GridReplicatedTxRemote<K, V>(
ctx.deploy().globalLoader(),
nodeId,
msg.threadId(),
msg.version(),
msg.commitVersion(),
msg.concurrency(),
msg.isolation(),
msg.isInvalidate(),
msg.timeout(),
msg.reads(),
msg.writes(),
ctx);
tx = ctx.tm().onCreated(tx);
if (tx == null || !ctx.tm().onStarted(tx))
throw new GridCacheTxRollbackException("Attempt to start a completed transaction: " + tx);
// Prepare prior to reordering, so the pending locks added
// in prepare phase will get properly ordered as well.
tx.prepare();
// Add remote candidates and reorder completed and uncompleted versions.
tx.addRemoteCandidates(
msg.candidatesByKey(), msg.committedVersions(), msg.rolledbackVersions());
if (msg.concurrency() == EVENTUALLY_CONSISTENT) {
if (log.isDebugEnabled()) log.debug("Committing transaction during remote prepare: " + tx);
tx.commit();
if (log.isDebugEnabled()) log.debug("Committed transaction during remote prepare: " + tx);
// Don't send response.
return;
}
res = new GridDistributedTxPrepareResponse<K, V>(msg.version());
Map<K, Collection<GridCacheMvccCandidate<K>>> cands = tx.localCandidates();
// Add local candidates (completed version must be set below).
res.candidates(cands);
} catch (GridException e) {
if (e instanceof GridCacheTxRollbackException) {
if (log.isDebugEnabled())
log.debug("Transaction was rolled back before prepare completed: " + tx);
} else if (e instanceof GridCacheTxOptimisticException) {
if (log.isDebugEnabled())
log.debug("Optimistic failure for remote transaction (will rollback): " + tx);
} else {
U.error(log, "Failed to process prepare request: " + msg, e);
}
if (tx != null)
// Automatically rollback remote transactions.
tx.rollback();
// Don't send response.
if (msg.concurrency() == EVENTUALLY_CONSISTENT) return;
res = new GridDistributedTxPrepareResponse<K, V>(msg.version());
res.error(e);
}
// Add completed versions.
res.completedVersions(
ctx.tm().committedVersions(msg.version()), ctx.tm().rolledbackVersions(msg.version()));
assert msg.concurrency() != EVENTUALLY_CONSISTENT;
GridNode node = ctx.discovery().node(nodeId);
if (node != null) {
try {
// Reply back to sender.
ctx.io().send(node, res);
} catch (GridException e) {
U.error(
log,
"Failed to send tx response to node (did the node leave grid?) [node="
+ node.id()
+ ", msg="
+ res
+ ']',
e);
if (tx != null) tx.rollback();
}
}
}
/**
* 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).");
}
}