@Override
@SuppressWarnings({"unchecked"})
public long getOrCreate(float o) {
if (DependencyTracker.isBypassCaches()) {
return calculatable.calculate(owner, o);
} else {
preCheckDirty();
lock(o);
try {
Object v = load(o);
ExceptionHelper.throwIfExceptionRecordNotExpired(v);
if (v != UNDEFINED) {
DependencyTracker.mark(getDependencyNode());
hit();
return (Long) v;
}
DependencyNode callerNode = DependencyTracker.track(getDependencyNode());
try {
while (true) {
try {
return create(o);
} catch (ResourceOccupied e) {
if (callerNode != null) {
throw e;
} else {
unlock(o);
try {
e.getResource().waitForEndOfModification();
} finally {
lock(o);
}
v = load(o);
ExceptionHelper.throwIfExceptionRecordNotExpired(v);
if (v != UNDEFINED) {
hit();
return (Long) v;
}
}
}
}
} finally {
DependencyTracker.exit(callerNode);
}
} finally {
unlock(o);
postCheckDirty();
}
}
}
