| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * 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.net.newresource.impl; |
| |
| import com.google.common.annotations.Beta; |
| import com.google.common.collect.ImmutableList; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.onosproject.net.newresource.ResourceAdminService; |
| import org.onosproject.net.newresource.ResourceAllocation; |
| import org.onosproject.net.newresource.ResourceConsumer; |
| import org.onosproject.net.newresource.ResourceService; |
| import org.onosproject.net.newresource.ResourcePath; |
| import org.onosproject.net.newresource.ResourceStore; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.function.Predicate; |
| import java.util.stream.Collectors; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * An implementation of ResourceService. |
| */ |
| @Component(immediate = true, enabled = false) |
| @Service |
| @Beta |
| public final class ResourceManager implements ResourceService, ResourceAdminService { |
| |
| private final ConcurrentMap<Class<?>, Predicate<?>> boundaries = new ConcurrentHashMap<>(); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ResourceStore store; |
| |
| @Override |
| public Optional<ResourceAllocation> allocate(ResourceConsumer consumer, ResourcePath resource) { |
| checkNotNull(consumer); |
| checkNotNull(resource); |
| |
| List<ResourceAllocation> allocations = allocate(consumer, ImmutableList.of(resource)); |
| if (allocations.isEmpty()) { |
| return Optional.empty(); |
| } |
| |
| assert allocations.size() == 1; |
| |
| ResourceAllocation allocation = allocations.get(0); |
| |
| assert allocation.resource().equals(resource); |
| |
| // cast is ensured by the assertions above |
| return Optional.of(allocation); |
| } |
| |
| @Override |
| public List<ResourceAllocation> allocate(ResourceConsumer consumer, |
| List<ResourcePath> resources) { |
| checkNotNull(consumer); |
| checkNotNull(resources); |
| |
| if (resources.stream().anyMatch(x -> !isValid(x))) { |
| return ImmutableList.of(); |
| } |
| |
| // TODO: implement support of resource hierarchy |
| // allocation for a particular resource implies allocations for all of the sub-resources need to be done |
| |
| boolean success = store.allocate(resources, consumer); |
| if (!success) { |
| return ImmutableList.of(); |
| } |
| |
| return resources.stream() |
| .map(x -> new ResourceAllocation(x, consumer)) |
| .collect(Collectors.toList()); |
| } |
| |
| @Override |
| public List<ResourceAllocation> allocate(ResourceConsumer consumer, ResourcePath... resources) { |
| checkNotNull(consumer); |
| checkNotNull(resources); |
| |
| return allocate(consumer, Arrays.asList(resources)); |
| } |
| |
| @Override |
| public boolean release(ResourceAllocation allocation) { |
| checkNotNull(allocation); |
| |
| return release(ImmutableList.of(allocation)); |
| } |
| |
| @Override |
| public boolean release(List<ResourceAllocation> allocations) { |
| checkNotNull(allocations); |
| |
| List<ResourcePath> resources = allocations.stream() |
| .map(ResourceAllocation::resource) |
| .collect(Collectors.toList()); |
| List<ResourceConsumer> consumers = allocations.stream() |
| .map(ResourceAllocation::consumer) |
| .collect(Collectors.toList()); |
| |
| return store.release(resources, consumers); |
| } |
| |
| @Override |
| public boolean release(ResourceAllocation... allocations) { |
| checkNotNull(allocations); |
| |
| return release(ImmutableList.copyOf(allocations)); |
| } |
| |
| @Override |
| public boolean release(ResourceConsumer consumer) { |
| checkNotNull(consumer); |
| |
| Collection<ResourceAllocation> allocations = getResourceAllocations(consumer); |
| return release(ImmutableList.copyOf(allocations)); |
| } |
| |
| @Override |
| public <T> Collection<ResourceAllocation> getResourceAllocations(ResourcePath parent, Class<T> cls) { |
| checkNotNull(parent); |
| checkNotNull(cls); |
| |
| Collection<ResourcePath> resources = store.getAllocatedResources(parent, cls); |
| List<ResourceAllocation> allocations = new ArrayList<>(resources.size()); |
| for (ResourcePath resource: resources) { |
| // We access store twice in this method, then the store may be updated by others |
| Optional<ResourceConsumer> consumer = store.getConsumer(resource); |
| if (consumer.isPresent()) { |
| allocations.add(new ResourceAllocation(resource, consumer.get())); |
| } |
| } |
| |
| return allocations; |
| } |
| |
| @Override |
| public Collection<ResourceAllocation> getResourceAllocations(ResourceConsumer consumer) { |
| checkNotNull(consumer); |
| |
| Collection<ResourcePath> resources = store.getResources(consumer); |
| return resources.stream() |
| .map(x -> new ResourceAllocation(x, consumer)) |
| .collect(Collectors.toList()); |
| } |
| |
| @Override |
| public boolean isAvailable(ResourcePath resource) { |
| checkNotNull(resource); |
| |
| Optional<ResourceConsumer> consumer = store.getConsumer(resource); |
| return !consumer.isPresent(); |
| } |
| |
| @Override |
| public <T> void defineResourceBoundary(Class<T> cls, Predicate<T> predicate) { |
| boundaries.put(cls, predicate); |
| } |
| |
| /** |
| * Returns the predicate associated with the specified resource. |
| * |
| * @param resource resource whose associated predicate is to be returned |
| * @param <T> type of the resource |
| * @return predicate associated with the resource |
| * Null if the resource doesn't have an associated predicate. |
| */ |
| @SuppressWarnings("unchecked") |
| private <T> Predicate<T> lookupPredicate(T resource) { |
| return (Predicate<T>) boundaries.get(resource.getClass()); |
| } |
| |
| /** |
| * Returns if the specified resource is in the resource range. |
| * E.g. VLAN ID against a link must be within 12 bit address space. |
| * |
| * @param resource resource to be checked if it is within the resource range |
| * @return true if the resource within the range, false otherwise |
| */ |
| boolean isValid(ResourcePath resource) { |
| List<Object> flatten = resource.components(); |
| Object bottom = flatten.get(flatten.size() - 1); |
| Predicate<Object> predicate = lookupPredicate(bottom); |
| if (predicate == null) { |
| return true; |
| } |
| |
| return predicate.test(bottom); |
| } |
| } |