/**
* Checks if all resources in the given set of resources are be available for the given resource
* user.
*
* @param resources The set of resources to be checked.
* @param resourceUser The resource user for which to check.
* @return <code>true</code> if, and only if, all resources in the given set are available for the
* given resource user.
*/
private boolean resourcesAvailableForUser(Set<TCSResource> resources, ResourceUser resourceUser) {
assert resources != null;
assert resourceUser != null;
for (TCSResource curResource : resources) {
// Check if the resource is available.
ReservationEntry entry = getReservationEntry(curResource);
if (!entry.isFree() && !entry.isAllocatedBy(resourceUser)) {
log.fine(resourceUser.getId() + ": Resource unavailable: " + entry.getResource());
return false;
}
}
return true;
}
/**
* Returns a set of resources that is a subset of the given set of resources and is reserved/could
* be released by the given resource user.
*
* @param resources The set of resources to be filtered for resources that could be released.
* @param resourceUser The resource user that should be able to release the returned resources.
* @return A set of resources that is a subset of the given set of resources and is reserved/could
* be released by the given resource user.
*/
private Set<TCSResource> getFreeableResources(
Set<TCSResource> resources, ResourceUser resourceUser) {
// Make sure we're freeing only resources that are allocated by us.
final Set<TCSResource> freeableResources = new HashSet<>();
for (TCSResource curRes : resources) {
ReservationEntry entry = getReservationEntry(curRes);
if (entry.isFree() || !entry.getResourceUser().equals(resourceUser)) {
log.warning("Freed resource not reserved: " + entry.getResource());
} else {
freeableResources.add(curRes);
}
}
return freeableResources;
}
@Override
public void allocateNow(ResourceUser resourceUser, Set<TCSResource> resources)
throws ResourceAllocationException {
Objects.requireNonNull(resourceUser, "resourceUser is null");
Objects.requireNonNull(resources, "resources is null");
synchronized (reservations) {
// Check if all resources are available.
final Set<TCSResource> availableResources = new HashSet<>();
for (TCSResource curResource : resources) {
ReservationEntry entry = getReservationEntry(curResource);
if (!entry.isFree() && !entry.getResourceUser().equals(resourceUser)) {
log.severe("Resource unavailable: " + curResource.getName());
// XXX DO something about it?!
} else {
availableResources.add(curResource);
}
}
// Allocate all requested resources that are available.
for (TCSResource curResource : availableResources) {
getReservationEntry(curResource).allocate(resourceUser);
}
}
}