@Override
public boolean allocate(List<? extends Resource<?, ?>> resources, ResourceConsumer consumer) {
checkNotNull(resources);
checkNotNull(consumer);
TransactionContext tx = service.transactionContextBuilder().build();
tx.begin();
try {
TransactionalMap<Resource<?, ?>, ResourceConsumer> txMap =
tx.getTransactionalMap(MAP_NAME, SERIALIZER);
for (Resource<?, ?> resource : resources) {
ResourceConsumer existing = txMap.putIfAbsent(resource, consumer);
// if the resource is already allocated to another consumer, the whole allocation fails
if (existing != null) {
tx.abort();
return false;
}
}
tx.commit();
return true;
} catch (Exception e) {
log.error("Exception thrown, abort the transaction", e);
tx.abort();
return false;
}
}
@Override
public boolean release(
List<? extends Resource<?, ?>> resources, List<ResourceConsumer> consumers) {
checkNotNull(resources);
checkNotNull(consumers);
checkArgument(resources.size() == consumers.size());
TransactionContext tx = service.transactionContextBuilder().build();
tx.begin();
try {
TransactionalMap<Resource<?, ?>, ResourceConsumer> txMap =
tx.getTransactionalMap(MAP_NAME, SERIALIZER);
Iterator<? extends Resource<?, ?>> resourceIte = resources.iterator();
Iterator<ResourceConsumer> consumerIte = consumers.iterator();
while (resourceIte.hasNext() && consumerIte.hasNext()) {
Resource<?, ?> resource = resourceIte.next();
ResourceConsumer consumer = consumerIte.next();
// if this single release fails (because the resource is allocated to another consumer,
// the whole release fails
if (!txMap.remove(resource, consumer)) {
tx.abort();
return false;
}
}
return true;
} catch (TransactionException e) {
log.error("Exception thrown, abort the transaction", e);
tx.abort();
return false;
}
}
@Override
public boolean allocate(List<Resource> resources, ResourceConsumer consumer) {
checkNotNull(resources);
checkNotNull(consumer);
TransactionContext tx = service.transactionContextBuilder().build();
tx.begin();
TransactionalMap<DiscreteResource, Set<Resource>> childTxMap =
tx.getTransactionalMap(CHILD_MAP, SERIALIZER);
TransactionalMap<DiscreteResource, ResourceConsumer> discreteConsumerTxMap =
tx.getTransactionalMap(DISCRETE_CONSUMER_MAP, SERIALIZER);
TransactionalMap<ResourceId, ContinuousResourceAllocation> continuousConsumerTxMap =
tx.getTransactionalMap(CONTINUOUS_CONSUMER_MAP, SERIALIZER);
for (Resource resource : resources) {
if (resource instanceof DiscreteResource) {
if (!lookup(childTxMap, resource).isPresent()) {
return abortTransaction(tx);
}
ResourceConsumer oldValue =
discreteConsumerTxMap.put((DiscreteResource) resource, consumer);
if (oldValue != null) {
return abortTransaction(tx);
}
} else if (resource instanceof ContinuousResource) {
Optional<ContinuousResource> continuous = lookup(childTxMap, (ContinuousResource) resource);
if (!continuous.isPresent()) {
return abortTransaction(tx);
}
ContinuousResourceAllocation allocations =
continuousConsumerTxMap.get(continuous.get().id());
if (!hasEnoughResource(continuous.get(), (ContinuousResource) resource, allocations)) {
return abortTransaction(tx);
}
boolean success =
appendValue(
continuousConsumerTxMap,
continuous.get(),
new ResourceAllocation(continuous.get(), consumer));
if (!success) {
return abortTransaction(tx);
}
}
}
return tx.commit();
}
@Override
public boolean release(List<Resource> resources, List<ResourceConsumer> consumers) {
checkNotNull(resources);
checkNotNull(consumers);
checkArgument(resources.size() == consumers.size());
TransactionContext tx = service.transactionContextBuilder().build();
tx.begin();
TransactionalMap<DiscreteResource, ResourceConsumer> discreteConsumerTxMap =
tx.getTransactionalMap(DISCRETE_CONSUMER_MAP, SERIALIZER);
TransactionalMap<ResourceId, ContinuousResourceAllocation> continuousConsumerTxMap =
tx.getTransactionalMap(CONTINUOUS_CONSUMER_MAP, SERIALIZER);
Iterator<Resource> resourceIte = resources.iterator();
Iterator<ResourceConsumer> consumerIte = consumers.iterator();
while (resourceIte.hasNext() && consumerIte.hasNext()) {
Resource resource = resourceIte.next();
ResourceConsumer consumer = consumerIte.next();
if (resource instanceof DiscreteResource) {
// if this single release fails (because the resource is allocated to another consumer,
// the whole release fails
if (!discreteConsumerTxMap.remove((DiscreteResource) resource, consumer)) {
return abortTransaction(tx);
}
} else if (resource instanceof ContinuousResource) {
ContinuousResource continuous = (ContinuousResource) resource;
ContinuousResourceAllocation allocation = continuousConsumerTxMap.get(continuous.id());
ImmutableList<ResourceAllocation> newAllocations =
allocation
.allocations()
.stream()
.filter(
x ->
!(x.consumer().equals(consumer)
&& ((ContinuousResource) x.resource()).value() == continuous.value()))
.collect(GuavaCollectors.toImmutableList());
if (!continuousConsumerTxMap.replace(
continuous.id(),
allocation,
new ContinuousResourceAllocation(allocation.original(), newAllocations))) {
return abortTransaction(tx);
}
}
}
return tx.commit();
}
@Override
public boolean register(List<Resource> resources) {
checkNotNull(resources);
if (log.isTraceEnabled()) {
resources.forEach(r -> log.trace("registering {}", r));
}
TransactionContext tx = service.transactionContextBuilder().build();
tx.begin();
TransactionalMap<DiscreteResource, Set<Resource>> childTxMap =
tx.getTransactionalMap(CHILD_MAP, SERIALIZER);
Map<DiscreteResource, List<Resource>> resourceMap =
resources
.stream()
.filter(x -> x.parent().isPresent())
.collect(Collectors.groupingBy(x -> x.parent().get()));
for (Map.Entry<DiscreteResource, List<Resource>> entry : resourceMap.entrySet()) {
Optional<DiscreteResource> child = lookup(childTxMap, entry.getKey());
if (!child.isPresent()) {
return abortTransaction(tx);
}
if (!appendValues(childTxMap, entry.getKey(), entry.getValue())) {
return abortTransaction(tx);
}
}
boolean success = tx.commit();
if (success) {
List<ResourceEvent> events =
resources
.stream()
.filter(x -> x.parent().isPresent())
.map(x -> new ResourceEvent(RESOURCE_ADDED, x))
.collect(Collectors.toList());
notifyDelegate(events);
}
return success;
}
@Override
public boolean unregister(List<Resource> resources) {
checkNotNull(resources);
TransactionContext tx = service.transactionContextBuilder().build();
tx.begin();
TransactionalMap<DiscreteResource, Set<Resource>> childTxMap =
tx.getTransactionalMap(CHILD_MAP, SERIALIZER);
TransactionalMap<DiscreteResource, ResourceConsumer> discreteConsumerTxMap =
tx.getTransactionalMap(DISCRETE_CONSUMER_MAP, SERIALIZER);
TransactionalMap<ResourceId, ContinuousResourceAllocation> continuousConsumerTxMap =
tx.getTransactionalMap(CONTINUOUS_CONSUMER_MAP, SERIALIZER);
// Extract Discrete instances from resources
Map<DiscreteResource, List<Resource>> resourceMap =
resources
.stream()
.filter(x -> x.parent().isPresent())
.collect(Collectors.groupingBy(x -> x.parent().get()));
// even if one of the resources is allocated to a consumer,
// all unregistrations are regarded as failure
for (Map.Entry<DiscreteResource, List<Resource>> entry : resourceMap.entrySet()) {
boolean allocated =
entry
.getValue()
.stream()
.anyMatch(
x -> {
if (x instanceof DiscreteResource) {
return discreteConsumerTxMap.get((DiscreteResource) x) != null;
} else if (x instanceof ContinuousResource) {
ContinuousResourceAllocation allocations =
continuousConsumerTxMap.get(x.id());
return allocations != null && !allocations.allocations().isEmpty();
} else {
return false;
}
});
if (allocated) {
return abortTransaction(tx);
}
if (!removeValues(childTxMap, entry.getKey(), entry.getValue())) {
return abortTransaction(tx);
}
}
boolean success = tx.commit();
if (success) {
List<ResourceEvent> events =
resources
.stream()
.filter(x -> x.parent().isPresent())
.map(x -> new ResourceEvent(RESOURCE_REMOVED, x))
.collect(Collectors.toList());
notifyDelegate(events);
}
return success;
}