/**
* @param alias Class alias.
* @return Deployed class.
*/
@Nullable
private GridDeployment getDeployment(String alias) {
assert Thread.holdsLock(mux);
LinkedList<GridDeployment> deps = cache.get(alias);
if (deps != null) {
assert !deps.isEmpty();
GridDeployment dep = deps.getFirst();
if (!dep.isUndeployed()) {
return dep;
}
}
return null;
}
/**
* Gets first element of this list.
*
* @return First element or {@code null} if list is empty.
*/
@Nullable
public V first() {
return vals.isEmpty() ? null : vals.getFirst();
}