/**
* Gets last added explicit lock candidate by thread id and key.
*
* @param threadId Thread id.
* @param key Key to look up.
* @return Last added explicit lock candidate for given thread id and key or {@code null} if no
* such candidate.
*/
@Nullable
public GridCacheMvccCandidate explicitLock(long threadId, KeyCacheObject key) {
if (threadId < 0) return explicitLock(key, null);
else {
GridCacheExplicitLockSpan span = pendingExplicit.get(threadId);
return span == null ? null : span.candidate(key, null);
}
}
/**
* Gets explicit lock candidate added by any thread by given key and lock version.
*
* @param key Key.
* @param ver Version.
* @return Lock candidate that satisfies given criteria or {@code null} if no such candidate.
*/
@Nullable
public GridCacheMvccCandidate explicitLock(KeyCacheObject key, @Nullable GridCacheVersion ver) {
for (GridCacheExplicitLockSpan span : pendingExplicit.values()) {
GridCacheMvccCandidate cand = span.candidate(key, ver);
if (cand != null) return cand;
}
return null;
}
/**
* Checks if given key is locked by thread with given id or any thread.
*
* @param key Key to check.
* @param threadId Thread id. If -1, all threads will be checked.
* @return {@code True} if locked by any or given thread (depending on {@code threadId} value).
*/
public boolean isLockedByThread(KeyCacheObject key, long threadId) {
if (threadId < 0) {
for (GridCacheExplicitLockSpan span : pendingExplicit.values()) {
GridCacheMvccCandidate cand = span.candidate(key, null);
if (cand != null && cand.owner()) return true;
}
} else {
GridCacheExplicitLockSpan span = pendingExplicit.get(threadId);
if (span != null) {
GridCacheMvccCandidate cand = span.candidate(key, null);
return cand != null && cand.owner();
}
}
return false;
}
