/** {@inheritDoc} */
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
super.readExternal(in);
futId = U.readGridUuid(in);
miniId = U.readGridUuid(in);
entries = U.readCollection(in);
invalidParts = U.readIntSet(in);
ver = CU.readVersion(in);
err = (Throwable) in.readObject();
if (invalidParts == null) invalidParts = Collections.emptyList();
assert futId != null;
assert miniId != null;
assert ver != null;
}
/** @return Near keys. */
public List<byte[]> nearKeyBytes() {
return nearKeyBytes != null ? nearKeyBytes : Collections.<byte[]>emptyList();
}
/**
* @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;
}
/** @return Collection of recovery writes. */
public Collection<GridCacheTxEntry<K, V>> recoveryWrites() {
return recoveryWrites == null
? Collections.<GridCacheTxEntry<K, V>>emptyList()
: recoveryWrites;
}
/** Clears all readers (usually when partition becomes invalid and ready for eviction). */
@Override
public void clearReaders() {
synchronized (mux) {
readers = Collections.emptyList();
}
}
/**
* Replicated cache entry.
*
* @author 2005-2011 Copyright (C) GridGain Systems, Inc.
* @version 3.1.1c.19062011
*/
public class GridDhtCacheEntry<K, V> extends GridDistributedCacheEntry<K, V> {
/** Gets node value from reader ID. */
private static final GridClosure<ReaderId, UUID> R2N =
new C1<ReaderId, UUID>() {
@Override
public UUID apply(ReaderId e) {
return e.nodeId();
}
};
/** Reader clients. */
@GridToStringInclude private volatile List<ReaderId> readers = Collections.emptyList();
/** Local partition. */
private final GridDhtLocalPartition<K, V> locPart;
/** Transactions future for added readers. */
private volatile GridCacheMultiTxFuture<K, V> txFut;
/**
* @param ctx Cache context.
* @param key Cache key.
* @param hash Key hash value.
* @param val Entry value.
* @param next Next entry in the linked list.
* @param ttl Time to live.
*/
public GridDhtCacheEntry(
GridCacheContext<K, V> ctx, K key, int hash, V val, GridCacheMapEntry<K, V> next, long ttl) {
super(ctx, key, hash, val, next, ttl);
// Record this entry with partition.
locPart = ctx.dht().topology().onAdded(this);
}
/** {@inheritDoc} */
@Override
public boolean partitionValid() {
return locPart.valid();
}
/** {@inheritDoc} */
@Override
public boolean markObsolete(GridCacheVersion ver) {
boolean rmv;
synchronized (mux) {
rmv = super.markObsolete(ver);
}
// Remove this entry from partition mapping.
if (rmv) cctx.dht().topology().onRemoved(this);
return rmv;
}
/**
* Add local candidate.
*
* @param nearNodeId Near node ID.
* @param nearVer Near version.
* @param threadId Owning thread ID.
* @param ver Lock version.
* @param timeout Timeout to acquire lock.
* @param reenter Reentry flag.
* @param ec Eventually consistent flag.
* @param tx Tx flag.
* @return New candidate.
* @throws GridCacheEntryRemovedException If entry has been removed.
* @throws GridDistributedLockCancelledException If lock was cancelled.
*/
@Nullable
public GridCacheMvccCandidate<K> addDhtLocal(
UUID nearNodeId,
GridCacheVersion nearVer,
long threadId,
GridCacheVersion ver,
long timeout,
boolean reenter,
boolean ec,
boolean tx)
throws GridCacheEntryRemovedException, GridDistributedLockCancelledException {
GridCacheMvccCandidate<K> cand;
GridCacheMvccCandidate<K> prev;
GridCacheMvccCandidate<K> owner;
V val;
synchronized (mux) {
// Check removed locks prior to obsolete flag.
checkRemoved(ver);
checkObsolete();
prev = mvcc.anyOwner();
boolean emptyBefore = mvcc.isEmpty();
cand =
mvcc.addLocal(this, nearNodeId, nearVer, threadId, ver, timeout, reenter, ec, tx, true);
owner = mvcc.anyOwner();
boolean emptyAfter = mvcc.isEmpty();
if (prev != owner) mux.notifyAll();
checkCallbacks(emptyBefore, emptyAfter);
val = rawGet();
}
// Don't link reentries.
if (cand != null && !cand.reentry())
// Link with other candidates in the same thread.
cctx.mvcc().addNext(cand);
checkOwnerChanged(prev, owner, val);
return cand;
}
/** {@inheritDoc} */
@Override
public boolean tmLock(GridCacheTxEx<K, V> tx, long timeout)
throws GridCacheEntryRemovedException, GridDistributedLockCancelledException {
if (tx.local()) {
GridDhtTxLocal<K, V> dhtTx = (GridDhtTxLocal<K, V>) tx;
// Null is returned if timeout is negative and there is other lock owner.
return addDhtLocal(
dhtTx.nearNodeId(),
dhtTx.nearXidVersion(),
tx.threadId(),
tx.xidVersion(),
timeout,
false,
tx.ec(),
true)
!= null;
}
try {
addRemote(
tx.nodeId(),
tx.otherNodeId(),
tx.threadId(),
tx.xidVersion(),
tx.timeout(),
tx.ec(),
true);
return true;
} catch (GridDistributedLockCancelledException ignored) {
if (log.isDebugEnabled())
log.debug("Attempted to enter tx lock for cancelled ID (will ignore): " + tx);
return false;
}
}
/** {@inheritDoc} */
@Override
public GridCacheMvccCandidate<K> removeLock() {
GridCacheMvccCandidate<K> ret = super.removeLock();
locPart.onUnlock();
return ret;
}
/** {@inheritDoc} */
@Override
public boolean removeLock(GridCacheVersion ver) throws GridCacheEntryRemovedException {
boolean ret = super.removeLock(ver);
locPart.onUnlock();
return ret;
}
/**
* @return Readers.
* @throws GridCacheEntryRemovedException If removed.
*/
public Collection<UUID> readers() throws GridCacheEntryRemovedException {
return F.viewReadOnly(checkReaders(), R2N);
}
/**
* @param nodeId Node ID.
* @return reader ID.
*/
@Nullable
private ReaderId readerId(UUID nodeId) {
for (ReaderId reader : readers) if (reader.nodeId().equals(nodeId)) return reader;
return null;
}
/**
* @param nodeId Reader to add.
* @param msgId Message ID.
* @return Future for all relevant transactions that were active at the time of adding reader, or
* {@code null} if reader was added
* @throws GridCacheEntryRemovedException If entry was removed.
*/
@Nullable
public GridFuture<Boolean> addReader(UUID nodeId, long msgId)
throws GridCacheEntryRemovedException {
// Don't add local node as reader.
if (cctx.nodeId().equals(nodeId)) return null;
GridNode node = cctx.discovery().node(nodeId);
// If remote node has no near cache, don't add it.
if (node == null || !U.hasNearCache(node, cctx.dht().near().name())) return null;
// If remote node is (primary?) or back up, don't add it as a reader.
if (U.nodeIds(cctx.affinity(partition(), CU.allNodes(cctx))).contains(nodeId)) return null;
boolean ret = false;
GridCacheMultiTxFuture<K, V> txFut;
Collection<GridCacheMvccCandidate<K>> cands = null;
synchronized (mux) {
checkObsolete();
txFut = this.txFut;
ReaderId reader = readerId(nodeId);
if (reader == null) {
reader = new ReaderId(nodeId, msgId);
readers = new LinkedList<ReaderId>(readers);
readers.add(reader);
// Seal.
readers = Collections.unmodifiableList(readers);
txFut = this.txFut = new GridCacheMultiTxFuture<K, V>(cctx);
cands = localCandidates();
ret = true;
} else {
long id = reader.messageId();
if (id < msgId) reader.messageId(msgId);
}
}
if (ret) {
assert txFut != null;
if (!F.isEmpty(cands)) {
for (GridCacheMvccCandidate<K> c : cands) {
GridCacheTxEx<K, V> tx = cctx.tm().<GridCacheTxEx<K, V>>tx(c.version());
if (tx != null) {
assert tx.local();
txFut.addTx(tx);
}
}
}
txFut.init();
if (!txFut.isDone()) {
txFut.listenAsync(
new CI1<GridFuture<?>>() {
@Override
public void apply(GridFuture<?> f) {
synchronized (mux) {
// Release memory.
GridDhtCacheEntry.this.txFut = null;
}
}
});
} else
// Release memory.
txFut = this.txFut = null;
}
return txFut;
}
/**
* @param nodeId Reader to remove.
* @param msgId Message ID.
* @return {@code True} if reader was removed as a result of this operation.
* @throws GridCacheEntryRemovedException If entry was removed.
*/
public boolean removeReader(UUID nodeId, long msgId) throws GridCacheEntryRemovedException {
synchronized (mux) {
checkObsolete();
ReaderId reader = readerId(nodeId);
if (reader == null || reader.messageId() > msgId) return false;
readers = new LinkedList<ReaderId>(readers);
readers.remove(reader);
// Seal.
readers = Collections.unmodifiableList(readers);
return true;
}
}
/** Clears all readers (usually when partition becomes invalid and ready for eviction). */
@Override
public void clearReaders() {
synchronized (mux) {
readers = Collections.emptyList();
}
}
/**
* @return Collection of readers after check.
* @throws GridCacheEntryRemovedException If removed.
*/
public Collection<ReaderId> checkReaders() throws GridCacheEntryRemovedException {
synchronized (mux) {
checkObsolete();
if (!readers.isEmpty()) {
List<ReaderId> rmv = null;
for (ReaderId reader : readers) {
if (!cctx.discovery().alive(reader.nodeId())) {
if (rmv == null) rmv = new LinkedList<ReaderId>();
rmv.add(reader);
}
}
if (rmv != null) {
readers = new LinkedList<ReaderId>(readers);
for (ReaderId rdr : rmv) readers.remove(rdr);
readers = Collections.unmodifiableList(readers);
}
}
return readers;
}
}
/** {@inheritDoc} */
@Override
protected boolean hasReaders() throws GridCacheEntryRemovedException {
synchronized (mux) {
checkReaders();
return !readers.isEmpty();
}
}
/**
* @param ver Version.
* @param mappings Mappings to set.
* @return Candidate, if one existed for the version, or {@code null} if candidate was not found.
* @throws GridCacheEntryRemovedException If removed.
*/
public GridCacheMvccCandidate<K> mappings(GridCacheVersion ver, Collection<UUID> mappings)
throws GridCacheEntryRemovedException {
synchronized (mux) {
checkObsolete();
GridCacheMvccCandidate<K> cand = mvcc.candidate(ver);
if (cand != null) cand.mappedNodeIds(mappings);
return cand;
}
}
/** {@inheritDoc} */
@Override
public GridCacheEntry<K, V> wrap(boolean prjAware) {
GridCacheContext<K, V> nearCtx = cctx.dht().near().context();
GridCacheProjectionImpl<K, V> prjPerCall = nearCtx.projectionPerCall();
if (prjPerCall != null && prjAware)
return new GridPartitionedCacheEntryImpl<K, V>(prjPerCall, nearCtx, key, this);
GridCacheEntryImpl<K, V> wrapper = this.wrapper;
if (wrapper == null)
this.wrapper = wrapper = new GridPartitionedCacheEntryImpl<K, V>(null, nearCtx, key, this);
return wrapper;
}
/** {@inheritDoc} */
@Override
public String toString() {
return S.toString(GridDhtCacheEntry.class, this, "super", super.toString());
}
/** Reader ID. */
private static class ReaderId {
/** Node ID. */
private UUID nodeId;
/** Message ID. */
private long msgId;
/**
* @param nodeId Node ID.
* @param msgId Message ID.
*/
ReaderId(UUID nodeId, long msgId) {
this.nodeId = nodeId;
this.msgId = msgId;
}
/** @return Node ID. */
UUID nodeId() {
return nodeId;
}
/** @return Message ID. */
long messageId() {
return msgId;
}
/** @param msgId Message ID. */
void messageId(long msgId) {
this.msgId = msgId;
}
/** {@inheritDoc} */
@Override
public String toString() {
return S.toString(ReaderId.class, this);
}
}
}