| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.store.resource.impl; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import org.onosproject.net.resource.ContinuousResource; |
| import org.onosproject.net.resource.ContinuousResourceId; |
| import org.onosproject.net.resource.DiscreteResourceId; |
| import org.onosproject.net.resource.Resource; |
| import org.onosproject.net.resource.ResourceAllocation; |
| import org.onosproject.net.resource.ResourceConsumerId; |
| import org.onosproject.store.service.ConsistentMap; |
| import org.onosproject.store.service.StorageService; |
| import org.onosproject.store.service.TransactionContext; |
| import org.onosproject.store.service.Versioned; |
| |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| import static org.onosproject.store.resource.impl.ConsistentResourceStore.SERIALIZER; |
| |
| |
| /** |
| * Consistent substore for continuous resources. |
| */ |
| class ConsistentContinuousResourceSubStore implements ConsistentResourceSubStore |
| <ContinuousResourceId, ContinuousResource, TransactionalContinuousResourceSubStore> { |
| private ConsistentMap<ContinuousResourceId, ContinuousResourceAllocation> consumers; |
| private ConsistentMap<DiscreteResourceId, Set<ContinuousResource>> childMap; |
| |
| ConsistentContinuousResourceSubStore(StorageService service) { |
| this.consumers = service.<ContinuousResourceId, ContinuousResourceAllocation>consistentMapBuilder() |
| .withName(MapNames.CONTINUOUS_CONSUMER_MAP) |
| .withSerializer(SERIALIZER) |
| .build(); |
| this.childMap = service.<DiscreteResourceId, Set<ContinuousResource>>consistentMapBuilder() |
| .withName(MapNames.CONTINUOUS_CHILD_MAP) |
| .withSerializer(SERIALIZER) |
| .build(); |
| |
| childMap.putIfAbsent(Resource.ROOT.id(), new LinkedHashSet<>()); |
| } |
| |
| @Override |
| public TransactionalContinuousResourceSubStore transactional(TransactionContext tx) { |
| return new TransactionalContinuousResourceSubStore(tx); |
| } |
| |
| // computational complexity: O(n) where n is the number of the existing allocations for the resource |
| @Override |
| public List<ResourceAllocation> getResourceAllocations(ContinuousResourceId resource) { |
| Versioned<ContinuousResourceAllocation> allocations = consumers.get(resource); |
| if (allocations == null) { |
| return ImmutableList.of(); |
| } |
| |
| return allocations.value().allocations().stream() |
| .filter(x -> x.resource().id().equals(resource)) |
| .collect(ImmutableList.toImmutableList()); |
| } |
| |
| @Override |
| public Set<ContinuousResource> getChildResources(DiscreteResourceId parent) { |
| Versioned<Set<ContinuousResource>> children = childMap.get(parent); |
| |
| if (children == null) { |
| return ImmutableSet.of(); |
| } |
| |
| return children.value(); |
| } |
| |
| @Override |
| public Set<ContinuousResource> getChildResources(DiscreteResourceId parent, Class<?> cls) { |
| // naive implementation |
| return getChildResources(parent).stream() |
| .filter(x -> x.isTypeOf(cls)) |
| .collect(Collectors.toCollection(LinkedHashSet::new)); |
| } |
| |
| @Override |
| public boolean isAvailable(ContinuousResource resource) { |
| // check if it's registered or not. |
| Versioned<Set<ContinuousResource>> children = childMap.get(resource.parent().get().id()); |
| if (children == null) { |
| return false; |
| } |
| |
| boolean notEnoughRegistered = children.value().stream() |
| .filter(c -> c.id().equals(resource.id())) |
| .findFirst() |
| .map(registered -> registered.value() < resource.value()) |
| .orElse(true); |
| if (notEnoughRegistered) { |
| // Capacity < requested, can never satisfy |
| return false; |
| } |
| |
| // check if there's enough left |
| Versioned<ContinuousResourceAllocation> allocation = consumers.get(resource.id()); |
| if (allocation == null) { |
| // no allocation (=no consumer) full registered resources available |
| return true; |
| } |
| |
| return allocation.value().hasEnoughResource(resource); |
| } |
| |
| @Override |
| public Stream<ContinuousResource> getAllocatedResources(DiscreteResourceId parent, Class<?> cls) { |
| Set<ContinuousResource> children = getChildResources(parent); |
| if (children.isEmpty()) { |
| return Stream.of(); |
| } |
| |
| return children.stream() |
| .filter(x -> x.id().equals(parent.child(cls))) |
| // we don't use cascading simple predicates like follows to reduce accesses to consistent map |
| // .filter(x -> continuousConsumers.containsKey(x.id())) |
| // .filter(x -> continuousConsumers.get(x.id()) != null) |
| // .filter(x -> !continuousConsumers.get(x.id()).value().allocations().isEmpty()); |
| .filter(resource -> { |
| Versioned<ContinuousResourceAllocation> allocation = consumers.get(resource.id()); |
| if (allocation == null) { |
| return false; |
| } |
| return !allocation.value().allocations().isEmpty(); |
| }); |
| } |
| |
| @Override |
| public Stream<ContinuousResource> getResources(ResourceConsumerId consumerId) { |
| return consumers.values().stream() |
| .flatMap(x -> x.value().allocations().stream()) |
| .filter(x -> x.consumerId().equals(consumerId)) |
| // this cast is safe because this class stores |
| // continuous resource allocations only |
| .map(x -> (ContinuousResource) x.resource()); |
| } |
| } |