| /* |
| * Copyright 2016-present 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.store.resource.impl; |
| |
| import com.google.common.collect.ImmutableList; |
| import org.onlab.util.GuavaCollectors; |
| import org.onosproject.net.resource.ContinuousResource; |
| import org.onosproject.net.resource.ResourceAllocation; |
| import org.onosproject.net.resource.ResourceConsumerId; |
| |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| // internal use only |
| final class ContinuousResourceAllocation { |
| private final ContinuousResource original; |
| private final ImmutableList<ResourceAllocation> allocations; |
| |
| static ContinuousResourceAllocation empty(ContinuousResource original) { |
| return new ContinuousResourceAllocation(original, ImmutableList.of()); |
| } |
| |
| ContinuousResourceAllocation(ContinuousResource original, |
| ImmutableList<ResourceAllocation> allocations) { |
| this.original = original; |
| this.allocations = allocations; |
| } |
| |
| // for serializer |
| private ContinuousResourceAllocation() { |
| this.original = null; |
| this.allocations = null; |
| } |
| |
| /** |
| * Checks if there is enough resource volume to allocated the requested resource |
| * against the specified resource. |
| * |
| * @param request requested resource |
| * @return true if there is enough resource volume. Otherwise, false. |
| */ |
| // computational complexity: O(n) where n is the number of allocations |
| boolean hasEnoughResource(ContinuousResource request) { |
| double allocated = allocations.stream() |
| .filter(x -> x.resource() instanceof ContinuousResource) |
| .map(x -> (ContinuousResource) x.resource()) |
| .mapToDouble(ContinuousResource::value) |
| .sum(); |
| double left = original.value() - allocated; |
| return request.value() <= left; |
| } |
| |
| ImmutableList<ResourceAllocation> allocations() { |
| return allocations; |
| } |
| |
| ContinuousResourceAllocation allocate(ResourceAllocation value) { |
| return new ContinuousResourceAllocation(original, ImmutableList.<ResourceAllocation>builder() |
| .addAll(allocations) |
| .add(value) |
| .build()); |
| } |
| |
| ContinuousResourceAllocation release(ContinuousResource resource, ResourceConsumerId consumerId) { |
| List<ResourceAllocation> nonMatched = allocations.stream() |
| .filter(x -> !(x.consumerId().equals(consumerId) && |
| ((ContinuousResource) x.resource()).value() == resource.value())) |
| .collect(Collectors.toList()); |
| |
| List<ResourceAllocation> matched = allocations.stream() |
| .filter(x -> (x.consumerId().equals(consumerId) && |
| ((ContinuousResource) x.resource()).value() == resource.value())) |
| .collect(Collectors.toList()); |
| |
| if (!matched.isEmpty()) { |
| matched.remove(0); |
| } |
| |
| return new ContinuousResourceAllocation(original, |
| Stream.concat(nonMatched.stream(), matched.stream()) |
| .collect(GuavaCollectors.toImmutableList())); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| ContinuousResourceAllocation that = (ContinuousResourceAllocation) o; |
| |
| if (!original.equals(that.original)) { |
| return false; |
| } |
| return allocations.equals(that.allocations); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(original, allocations); |
| } |
| } |