/**
* @param mapping Mappings.
* @param key Key to map.
* @param topVer Topology version.
* @return Near lock mapping.
* @throws GridException If mapping for key failed.
*/
private GridNearLockMapping<K, V> map(
K key, @Nullable GridNearLockMapping<K, V> mapping, long topVer) throws GridException {
assert mapping == null || mapping.node() != null;
GridNode primary = cctx.affinity().primary(key, topVer);
if (cctx.discovery().node(primary.id()) == null)
// If primary node left the grid before lock acquisition, fail the whole future.
throw newTopologyException(null, primary.id());
if (inTx() && tx.groupLock() && !primary.isLocal())
throw new GridException(
"Failed to start group lock transaction (local node is not primary for "
+ " key) [key="
+ key
+ ", primaryNodeId="
+ primary.id()
+ ']');
if (mapping == null || !primary.id().equals(mapping.node().id()))
mapping = new GridNearLockMapping<>(primary, key);
else mapping.addKey(key);
return mapping;
}
/**
* Gets next near lock mapping and either acquires dht locks locally or sends near lock request to
* remote primary node.
*
* @param mappings Queue of mappings.
* @throws GridException If mapping can not be completed.
*/
private void proceedMapping(final ConcurrentLinkedDeque8<GridNearLockMapping<K, V>> mappings)
throws GridException {
GridNearLockMapping<K, V> map = mappings.poll();
// If there are no more mappings to process, complete the future.
if (map == null) return;
final GridNearLockRequest<K, V> req = map.request();
final Collection<K> mappedKeys = map.distributedKeys();
final GridNode node = map.node();
if (filter != null && filter.length != 0) req.filter(filter, cctx);
if (node.isLocal()) {
req.miniId(GridUuid.randomUuid());
if (log.isDebugEnabled()) log.debug("Before locally locking near request: " + req);
GridFuture<GridNearLockResponse<K, V>> fut;
if (CU.DHT_ENABLED) fut = dht().lockAllAsync(cctx.localNode(), req, filter);
else {
// Create dummy values for testing.
GridNearLockResponse<K, V> res =
new GridNearLockResponse<>(lockVer, futId, null, false, 1, null);
res.addValueBytes(null, null, true, lockVer, lockVer, cctx);
fut = new GridFinishedFuture<>(ctx, res);
}
// Add new future.
add(
new GridEmbeddedFuture<>(
cctx.kernalContext(),
fut,
new C2<GridNearLockResponse<K, V>, Exception, Boolean>() {
@Override
public Boolean apply(GridNearLockResponse<K, V> res, Exception e) {
if (CU.isLockTimeoutOrCancelled(e)
|| (res != null && CU.isLockTimeoutOrCancelled(res.error()))) return false;
if (e != null) {
onError(e);
return false;
}
if (res == null) {
onError(new GridException("Lock response is null for future: " + this));
return false;
}
if (res.error() != null) {
onError(res.error());
return false;
}
if (log.isDebugEnabled())
log.debug(
"Acquired lock for local DHT mapping [locId="
+ cctx.nodeId()
+ ", mappedKeys="
+ mappedKeys
+ ", fut="
+ GridNearLockFuture.this
+ ']');
try {
int i = 0;
for (K k : mappedKeys) {
while (true) {
GridNearCacheEntry<K, V> entry =
cctx.near().entryExx(k, req.topologyVersion());
try {
GridTuple3<GridCacheVersion, V, byte[]> oldValTup =
valMap.get(entry.key());
boolean hasBytes = entry.hasValue();
V oldVal = entry.rawGet();
V newVal = res.value(i);
byte[] newBytes = res.valueBytes(i);
GridCacheVersion dhtVer = res.dhtVersion(i);
GridCacheVersion mappedVer = res.mappedVersion(i);
// On local node don't record twice if DHT cache already recorded.
boolean record =
retval && oldValTup != null && oldValTup.get1().equals(dhtVer);
if (newVal == null) {
if (oldValTup != null) {
if (oldValTup.get1().equals(dhtVer)) {
newVal = oldValTup.get2();
newBytes = oldValTup.get3();
}
oldVal = oldValTup.get2();
}
}
// Lock is held at this point, so we can set the
// returned value if any.
entry.resetFromPrimary(newVal, newBytes, lockVer, dhtVer, node.id());
entry.readyNearLock(
lockVer,
mappedVer,
res.committedVersions(),
res.rolledbackVersions(),
res.pending());
if (inTx() && implicitTx() && tx.onePhaseCommit()) {
boolean pass = res.filterResult(i);
tx.entry(k).filters(pass ? CU.<K, V>empty() : CU.<K, V>alwaysFalse());
}
if (record) {
if (cctx.events().isRecordable(EVT_CACHE_OBJECT_READ))
cctx.events()
.addEvent(
entry.partition(),
entry.key(),
tx,
null,
EVT_CACHE_OBJECT_READ,
newVal,
newVal != null,
oldVal,
hasBytes,
CU.subjectId(tx, cctx));
cctx.cache().metrics0().onRead(oldVal != null);
}
if (log.isDebugEnabled())
log.debug(
"Processed response for entry [res="
+ res
+ ", entry="
+ entry
+ ']');
break; // Inner while loop.
} catch (GridCacheEntryRemovedException ignored) {
if (log.isDebugEnabled())
log.debug(
"Failed to add candidates because entry was "
+ "removed (will renew).");
// Replace old entry with new one.
entries.set(
i,
(GridDistributedCacheEntry<K, V>) cctx.cache().entryEx(entry.key()));
}
}
i++; // Increment outside of while loop.
}
// Proceed and add new future (if any) before completing embedded future.
proceedMapping(mappings);
} catch (GridException ex) {
onError(ex);
return false;
}
return true;
}
}));
} else {
final MiniFuture fut = new MiniFuture(node, mappedKeys, mappings);
req.miniId(fut.futureId());
add(fut); // Append new future.
GridFuture<?> txSync = null;
if (inTx()) txSync = cctx.tm().awaitFinishAckAsync(node.id(), tx.threadId());
if (txSync == null || txSync.isDone()) {
try {
if (log.isDebugEnabled())
log.debug("Sending near lock request [node=" + node.id() + ", req=" + req + ']');
cctx.io().send(node, req);
} catch (GridTopologyException ex) {
assert fut != null;
fut.onResult(ex);
}
} else {
txSync.listenAsync(
new CI1<GridFuture<?>>() {
@Override
public void apply(GridFuture<?> t) {
try {
if (log.isDebugEnabled())
log.debug(
"Sending near lock request [node=" + node.id() + ", req=" + req + ']');
cctx.io().send(node, req);
} catch (GridTopologyException ex) {
assert fut != null;
fut.onResult(ex);
} catch (GridException e) {
onError(e);
}
}
});
}
}
}
/**
* Maps keys to nodes. Note that we can not simply group keys by nodes and send lock request as
* such approach does not preserve order of lock acquisition. Instead, keys are split in
* continuous groups belonging to one primary node and locks for these groups are acquired
* sequentially.
*
* @param keys Keys.
*/
private void map(Iterable<? extends K> keys) {
try {
GridDiscoveryTopologySnapshot snapshot = topSnapshot.get();
assert snapshot != null;
long topVer = snapshot.topologyVersion();
assert topVer > 0;
if (CU.affinityNodes(cctx, topVer).isEmpty()) {
onDone(
new GridTopologyException(
"Failed to map keys for near-only cache (all "
+ "partition nodes left the grid)."));
return;
}
ConcurrentLinkedDeque8<GridNearLockMapping<K, V>> mappings = new ConcurrentLinkedDeque8<>();
// Assign keys to primary nodes.
GridNearLockMapping<K, V> map = null;
for (K key : keys) {
GridNearLockMapping<K, V> updated = map(key, map, topVer);
// If new mapping was created, add to collection.
if (updated != map) mappings.add(updated);
map = updated;
}
if (isDone()) {
if (log.isDebugEnabled()) log.debug("Abandoning (re)map because future is done: " + this);
return;
}
if (log.isDebugEnabled())
log.debug("Starting (re)map for mappings [mappings=" + mappings + ", fut=" + this + ']');
// Create mini futures.
for (Iterator<GridNearLockMapping<K, V>> iter = mappings.iterator(); iter.hasNext(); ) {
GridNearLockMapping<K, V> mapping = iter.next();
GridNode node = mapping.node();
Collection<K> mappedKeys = mapping.mappedKeys();
assert !mappedKeys.isEmpty();
GridNearLockRequest<K, V> req = null;
Collection<K> distributedKeys = new ArrayList<>(mappedKeys.size());
boolean explicit = false;
for (K key : mappedKeys) {
while (true) {
GridNearCacheEntry<K, V> entry = null;
try {
entry = cctx.near().entryExx(key, topVer);
if (!cctx.isAll(entry.wrap(false), filter)) {
if (log.isDebugEnabled())
log.debug("Entry being locked did not pass filter (will not lock): " + entry);
onComplete(false, false);
return;
}
// Removed exception may be thrown here.
GridCacheMvccCandidate<K> cand = addEntry(topVer, entry, node.id());
if (isDone()) {
if (log.isDebugEnabled())
log.debug(
"Abandoning (re)map because future is done after addEntry attempt "
+ "[fut="
+ this
+ ", entry="
+ entry
+ ']');
return;
}
if (cand != null) {
if (tx == null && !cand.reentry())
cctx.mvcc().addExplicitLock(threadId, cand, snapshot);
GridTuple3<GridCacheVersion, V, byte[]> val = entry.versionedValue();
if (val == null) {
GridDhtCacheEntry<K, V> dhtEntry = dht().peekExx(key);
try {
if (dhtEntry != null) val = dhtEntry.versionedValue(topVer);
} catch (GridCacheEntryRemovedException ignored) {
assert dhtEntry.obsolete()
: " Got removed exception for non-obsolete entry: " + dhtEntry;
if (log.isDebugEnabled())
log.debug(
"Got removed exception for DHT entry in map (will ignore): " + dhtEntry);
}
}
GridCacheVersion dhtVer = null;
if (val != null) {
dhtVer = val.get1();
valMap.put(key, val);
}
if (!cand.reentry()) {
if (req == null) {
req =
new GridNearLockRequest<>(
topVer,
cctx.nodeId(),
threadId,
futId,
lockVer,
inTx(),
implicitTx(),
implicitSingleTx(),
read,
isolation(),
isInvalidate(),
timeout,
syncCommit(),
syncRollback(),
mappedKeys.size(),
inTx() ? tx.size() : mappedKeys.size(),
inTx() ? tx.groupLockKey() : null,
inTx() && tx.partitionLock(),
inTx() ? tx.subjectId() : null);
mapping.request(req);
}
distributedKeys.add(key);
GridCacheTxEntry<K, V> writeEntry = tx != null ? tx.writeMap().get(key) : null;
if (tx != null) tx.addKeyMapping(key, mapping.node());
req.addKeyBytes(
key,
node.isLocal() ? null : entry.getOrMarshalKeyBytes(),
retval && dhtVer == null,
dhtVer, // Include DHT version to match remote DHT entry.
writeEntry,
inTx() ? tx.entry(key).drVersion() : null,
cctx);
// Clear transfer required flag since we are sending message.
if (writeEntry != null) writeEntry.transferRequired(false);
}
if (cand.reentry())
explicit = tx != null && !entry.hasLockCandidate(tx.xidVersion());
} else
// Ignore reentries within transactions.
explicit = tx != null && !entry.hasLockCandidate(tx.xidVersion());
if (explicit) tx.addKeyMapping(key, mapping.node());
break;
} catch (GridCacheEntryRemovedException ignored) {
assert entry.obsolete() : "Got removed exception on non-obsolete entry: " + entry;
if (log.isDebugEnabled())
log.debug("Got removed entry in lockAsync(..) method (will retry): " + entry);
}
}
// Mark mapping explicit lock flag.
if (explicit) {
boolean marked = tx != null && tx.markExplicit(node.id());
assert tx == null || marked;
}
}
if (!distributedKeys.isEmpty()) mapping.distributedKeys(distributedKeys);
else {
assert mapping.request() == null;
iter.remove();
}
}
cctx.mvcc().recheckPendingLocks();
proceedMapping(mappings);
} catch (GridException ex) {
onError(ex);
}
}
/** @param m Mapping. */
private void finish(GridDistributedTxMapping<K, V> m) {
GridNode n = m.node();
assert !m.empty();
GridNearTxFinishRequest<K, V> req =
new GridNearTxFinishRequest<>(
futId,
tx.xidVersion(),
tx.threadId(),
commit,
tx.isInvalidate(),
m.explicitLock(),
tx.topologyVersion(),
null,
null,
null,
tx.size(),
commit && tx.pessimistic() ? m.writes() : null,
commit && tx.pessimistic() ? tx.writeEntries() : null,
commit ? tx.syncCommit() : tx.syncRollback(),
tx.subjectId(),
tx.taskNameHash());
// If this is the primary node for the keys.
if (n.isLocal()) {
req.miniId(GridUuid.randomUuid());
if (CU.DHT_ENABLED) {
GridFuture<GridCacheTx> fut =
commit ? dht().commitTx(n.id(), req) : dht().rollbackTx(n.id(), req);
// Add new future.
add(fut);
} else
// Add done future for testing.
add(new GridFinishedFuture<GridCacheTx>(ctx));
} else {
MiniFuture fut = new MiniFuture(m);
req.miniId(fut.futureId());
add(fut); // Append new future.
if (tx.pessimistic()) cctx.tm().beforeFinishRemote(n.id(), tx.threadId());
try {
cctx.io().send(n, req);
// If we don't wait for result, then mark future as done.
if (!isSync() && !m.explicitLock()) fut.onDone();
} catch (GridTopologyException e) {
// Remove previous mapping.
mappings.remove(m.node().id());
fut.onResult(e);
} catch (GridException e) {
// Fail the whole thing.
fut.onResult(e);
}
}
}