/**
* @param from From version.
* @param to To version.
*/
public void mapVersion(GridCacheVersion from, GridCacheVersion to) {
assert from != null;
assert to != null;
GridCacheVersion old = near2dht.put(from, to);
assert old == null || old == to || old.equals(to);
if (log.isDebugEnabled()) log.debug("Added version mapping [from=" + from + ", to=" + to + ']');
}
/**
* Marks near-local candidate as ready and makes locks reassignment. Following reorderings are
* performed when candidate is marked ready:
*
* <ul>
* <li/>All candidates preceding ready one are moved right after it.
* <li/>Near local candidate is assigned a mapped dht version. All remote non-pending candidates
* with version less then mapped dht version are marked as owned.
* </ul>
*
* @param ver Version to mark as ready.
* @param mappedVer Mapped dht version.
* @param committedVers Committed versions.
* @param rolledBackVers Rolled back versions.
* @param pending Pending dht versions that are not owned and which version is less then mapped.
* @return Lock owner after reassignment.
*/
@Nullable
public CacheLockCandidates readyNearLocal(
GridCacheVersion ver,
GridCacheVersion mappedVer,
Collection<GridCacheVersion> committedVers,
Collection<GridCacheVersion> rolledBackVers,
Collection<GridCacheVersion> pending) {
GridCacheMvccCandidate cand = candidate(locs, ver);
if (cand != null) {
assert cand.nearLocal() : "Near local candidate is not marked as near local: " + cand;
cand.setReady();
boolean setMapped = cand.otherVersion(mappedVer);
assert setMapped
: "Failed to set mapped dht version for near local candidate [mappedVer="
+ mappedVer
+ ", cand="
+ cand
+ ']';
// For near locals we move all not owned candidates after this one.
List<GridCacheMvccCandidate> mvAfter = null;
for (ListIterator<GridCacheMvccCandidate> it = locs.listIterator(); it.hasNext(); ) {
GridCacheMvccCandidate c = it.next();
assert c.nearLocal() : "Near local candidate is not marked as near local: " + c;
if (c == cand) {
if (mvAfter != null) for (GridCacheMvccCandidate mv : mvAfter) it.add(mv);
break;
} else {
if (c.owner()) continue;
assert !c.ready() || (c.read() && cand.read())
: "Cannot have more then one ready near-local candidate [c="
+ c
+ ", cand="
+ cand
+ ", mvcc="
+ this
+ ']';
it.remove();
if (mvAfter == null) mvAfter = new LinkedList<>();
mvAfter.add(c);
}
}
// Mark all remote candidates with less version as owner unless it is pending.
if (rmts != null) {
for (GridCacheMvccCandidate rmt : rmts) {
GridCacheVersion rmtVer = rmt.version();
if (rmtVer.isLess(mappedVer)) {
if (!pending.contains(rmtVer) && !mappedVer.equals(rmt.ownerVersion())) rmt.setOwner();
} else {
// Remote version is greater, so need to check if it was committed or rolled back.
if (committedVers.contains(rmtVer) || rolledBackVers.contains(rmtVer)) rmt.setOwner();
}
}
}
reassign();
}
return allOwners();
}