/** {@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;
}
}
/**
* @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;
}