/** {@inheritDoc} */
@SuppressWarnings({"unchecked"})
@Override
public void onOwnerChanged(
GridCacheEntryEx entry, GridCacheMvccCandidate prev, GridCacheMvccCandidate owner) {
assert entry != null;
assert owner != prev : "New and previous owner are identical instances: " + owner;
assert owner == null || prev == null || !owner.version().equals(prev.version())
: "New and previous owners have identical versions [owner="
+ owner
+ ", prev="
+ prev
+ ']';
if (log.isDebugEnabled())
log.debug(
"Received owner changed callback ["
+ entry.key()
+ ", owner="
+ owner
+ ", prev="
+ prev
+ ']');
if (owner != null && (owner.local() || owner.nearLocal())) {
Collection<? extends GridCacheFuture> futCol = futs.get(owner.version());
if (futCol != null) {
for (GridCacheFuture fut : futCol) {
if (fut instanceof GridCacheMvccFuture && !fut.isDone()) {
GridCacheMvccFuture<Boolean> mvccFut = (GridCacheMvccFuture<Boolean>) fut;
// Since this method is called outside of entry synchronization,
// we can safely invoke any method on the future.
// Also note that we don't remove future here if it is done.
// The removal is initiated from within future itself.
if (mvccFut.onOwnerChanged(entry, owner)) return;
}
}
}
}
if (log.isDebugEnabled())
log.debug(
"Lock future not found for owner change callback (will try transaction futures) [owner="
+ owner
+ ", prev="
+ prev
+ ", entry="
+ entry
+ ']');
// If no future was found, delegate to transaction manager.
if (cctx.tm().onOwnerChanged(entry, owner)) {
if (log.isDebugEnabled()) log.debug("Found transaction for changed owner: " + owner);
} else if (log.isDebugEnabled())
log.debug("Failed to find transaction for changed owner: " + owner);
for (FinishLockFuture f : finishFuts) f.recheck(entry);
}
/** @return Key. */
public K key() {
GridCacheEntryEx<K, ?> parent0 = parent;
if (parent0 == null)
throw new IllegalStateException(
"Parent entry was not initialized for MVCC candidate: " + this);
return parent0.key();
}
/** {@inheritDoc} */
@Override
public String toString() {
GridCacheMvccCandidate<?> prev = previous();
GridCacheMvccCandidate<?> next = next();
return S.toString(
GridCacheMvccCandidate.class,
this,
"key",
parent == null ? null : parent.key(),
"masks",
Mask.toString(flags()),
"prevVer",
(prev == null ? null : prev.version()),
"nextVer",
(next == null ? null : next.version()));
}
/** @return {@code True} if locks have been acquired. */
private boolean checkLocks() {
if (!isDone() && initialized() && !hasPending()) {
for (int i = 0; i < entries.size(); i++) {
while (true) {
GridCacheEntryEx<K, V> cached = entries.get(i);
try {
if (!locked(cached)) {
if (log.isDebugEnabled())
log.debug(
"Lock is still not acquired for entry (will keep waiting) [entry="
+ cached
+ ", fut="
+ this
+ ']');
return false;
}
break;
}
// Possible in concurrent cases, when owner is changed after locks
// have been released or cancelled.
catch (GridCacheEntryRemovedException ignore) {
if (log.isDebugEnabled())
log.debug("Got removed entry in onOwnerChanged method (will retry): " + cached);
// Replace old entry with new one.
entries.set(i, (GridDistributedCacheEntry<K, V>) cctx.cache().entryEx(cached.key()));
}
}
}
if (log.isDebugEnabled())
log.debug("Local lock acquired for entries [fut=" + this + ", entries=" + entries + "]");
onComplete(true, true);
return true;
}
return false;
}
/**
* Undoes all locks.
*
* @param dist If {@code true}, then remove locks from remote nodes as well.
*/
private void undoLocks(boolean dist) {
// Transactions will undo during rollback.
if (dist && tx == null) cctx.nearTx().removeLocks(lockVer, keys);
else {
if (tx != null) {
if (tx.setRollbackOnly()) {
if (log.isDebugEnabled())
log.debug(
"Marked transaction as rollback only because locks could not be acquired: " + tx);
} else if (log.isDebugEnabled())
log.debug(
"Transaction was not marked rollback-only while locks were not acquired: " + tx);
}
for (GridCacheEntryEx<K, V> e : entriesCopy()) {
try {
e.removeLock(lockVer);
} catch (GridCacheEntryRemovedException ignored) {
while (true) {
try {
e = cctx.cache().peekEx(e.key());
if (e != null) e.removeLock(lockVer);
break;
} catch (GridCacheEntryRemovedException ignore) {
if (log.isDebugEnabled())
log.debug(
"Attempted to remove lock on removed entry (will retry) [ver="
+ lockVer
+ ", entry="
+ e
+ ']');
}
}
}
}
}
cctx.mvcc().recheckPendingLocks();
}
/**
* @param e Transaction entry.
* @return {@code True} if entry is locally mapped as a primary or back up node.
*/
protected boolean isNearLocallyMapped(GridCacheEntryEx<K, V> e) {
return F.contains(ctx.affinity(e.key(), CU.allNodes(ctx)), ctx.localNode());
}
