Sho SHIMIZU | 78ee25c | 2015-07-16 15:54:14 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.net.newresource.impl; |
| 17 | |
| 18 | import com.google.common.annotations.Beta; |
| 19 | import com.google.common.collect.ImmutableList; |
| 20 | import org.apache.felix.scr.annotations.Component; |
| 21 | import org.apache.felix.scr.annotations.Reference; |
| 22 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 23 | import org.apache.felix.scr.annotations.Service; |
| 24 | import org.onosproject.net.newresource.DefaultResource; |
| 25 | import org.onosproject.net.newresource.DefaultResourceAllocation; |
| 26 | import org.onosproject.net.newresource.Resource; |
| 27 | import org.onosproject.net.newresource.ResourceAllocation; |
| 28 | import org.onosproject.net.newresource.ResourceConsumer; |
| 29 | import org.onosproject.net.newresource.ResourceService; |
| 30 | import org.onosproject.net.newresource.ResourceStore; |
| 31 | |
| 32 | import java.util.ArrayList; |
| 33 | import java.util.Arrays; |
| 34 | import java.util.Collection; |
| 35 | import java.util.List; |
| 36 | import java.util.Optional; |
| 37 | import java.util.stream.Collectors; |
| 38 | |
| 39 | import static com.google.common.base.Preconditions.checkNotNull; |
| 40 | |
| 41 | /** |
| 42 | * An implementation of ResourceService. |
| 43 | */ |
| 44 | @Component(immediate = true, enabled = false) |
| 45 | @Service |
| 46 | @Beta |
| 47 | public final class ResourceManager implements ResourceService { |
| 48 | |
| 49 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 50 | protected ResourceStore store; |
| 51 | |
| 52 | @SuppressWarnings("unchecked") |
| 53 | @Override |
| 54 | public <S, T> Optional<ResourceAllocation<S, T>> allocate(ResourceConsumer consumer, Resource<S, T> resource) { |
| 55 | checkNotNull(consumer); |
| 56 | checkNotNull(resource); |
| 57 | |
| 58 | List<ResourceAllocation<?, ?>> allocations = allocate(consumer, ImmutableList.of(resource)); |
| 59 | if (allocations.isEmpty()) { |
| 60 | return Optional.empty(); |
| 61 | } |
| 62 | |
| 63 | assert allocations.size() == 1; |
| 64 | |
| 65 | ResourceAllocation<?, ?> allocation = allocations.get(0); |
| 66 | |
| 67 | assert allocation.subject().getClass() == resource.subject().getClass(); |
| 68 | assert allocation.resource().getClass() == resource.resource().getClass(); |
| 69 | |
| 70 | // cast is ensured by the assertions above |
| 71 | return Optional.of((ResourceAllocation<S, T>) allocation); |
| 72 | } |
| 73 | |
| 74 | @Override |
| 75 | public List<ResourceAllocation<?, ?>> allocate(ResourceConsumer consumer, |
| 76 | List<? extends Resource<?, ?>> resources) { |
| 77 | checkNotNull(consumer); |
| 78 | checkNotNull(resources); |
| 79 | |
| 80 | if (resources.stream().anyMatch(x -> !isValid(x))) { |
| 81 | return ImmutableList.of(); |
| 82 | } |
| 83 | |
| 84 | // TODO: implement support of resource hierarchy |
| 85 | // allocation for a particular resource implies allocations for all of the sub-resources need to be done |
| 86 | |
| 87 | boolean success = store.allocate(resources, consumer); |
| 88 | if (!success) { |
| 89 | return ImmutableList.of(); |
| 90 | } |
| 91 | |
| 92 | return resources.stream() |
| 93 | .map(x -> new DefaultResourceAllocation<>(x.subject(), x.resource(), consumer)) |
| 94 | .collect(Collectors.toList()); |
| 95 | } |
| 96 | |
| 97 | @Override |
| 98 | public List<ResourceAllocation<?, ?>> allocate(ResourceConsumer consumer, Resource<?, ?>... resources) { |
| 99 | checkNotNull(consumer); |
| 100 | checkNotNull(resources); |
| 101 | |
| 102 | return allocate(consumer, Arrays.asList(resources)); |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | public <S, T> boolean release(ResourceAllocation<S, T> allocation) { |
| 107 | checkNotNull(allocation); |
| 108 | |
| 109 | return release(ImmutableList.of(allocation)); |
| 110 | } |
| 111 | |
| 112 | @Override |
| 113 | public boolean release(List<? extends ResourceAllocation<?, ?>> allocations) { |
| 114 | checkNotNull(allocations); |
| 115 | |
| 116 | List<DefaultResource<?, ?>> resources = allocations.stream() |
| 117 | .map(x -> new DefaultResource<>(x.subject(), x.resource())) |
| 118 | .collect(Collectors.toList()); |
| 119 | List<ResourceConsumer> consumers = allocations.stream() |
| 120 | .map(ResourceAllocation::consumer) |
| 121 | .collect(Collectors.toList()); |
| 122 | |
| 123 | return store.release(resources, consumers); |
| 124 | } |
| 125 | |
| 126 | @Override |
| 127 | public boolean release(ResourceAllocation<?, ?>... allocations) { |
| 128 | checkNotNull(allocations); |
| 129 | |
| 130 | return release(ImmutableList.copyOf(allocations)); |
| 131 | } |
| 132 | |
| 133 | @Override |
| 134 | public boolean release(ResourceConsumer consumer) { |
| 135 | checkNotNull(consumer); |
| 136 | |
| 137 | Collection<ResourceAllocation<?, ?>> allocations = getResourceAllocations(consumer); |
| 138 | return release(ImmutableList.copyOf(allocations)); |
| 139 | } |
| 140 | |
| 141 | @Override |
| 142 | public <S, T> Collection<ResourceAllocation<S, T>> getResourceAllocations(S subject, Class<T> cls) { |
| 143 | checkNotNull(subject); |
| 144 | checkNotNull(cls); |
| 145 | |
| 146 | Collection<Resource<S, T>> resources = store.getAllocatedResources(subject, cls); |
| 147 | List<ResourceAllocation<S, T>> allocations = new ArrayList<>(resources.size()); |
| 148 | for (Resource<S, T> resource: resources) { |
| 149 | // We access store twice in this method, then the store may be updated by others |
| 150 | Optional<ResourceConsumer> consumer = store.getConsumer(resource); |
| 151 | if (consumer.isPresent()) { |
| 152 | allocations.add( |
| 153 | new DefaultResourceAllocation<>(resource.subject(), resource.resource(), consumer.get())); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | return allocations; |
| 158 | } |
| 159 | |
| 160 | @Override |
| 161 | public Collection<ResourceAllocation<?, ?>> getResourceAllocations(ResourceConsumer consumer) { |
| 162 | checkNotNull(consumer); |
| 163 | |
| 164 | Collection<Resource<?, ?>> resources = store.getResources(consumer); |
| 165 | return resources.stream() |
| 166 | .map(x -> new DefaultResourceAllocation<>(x.subject(), x.resource(), consumer)) |
| 167 | .collect(Collectors.toList()); |
| 168 | } |
| 169 | |
| 170 | @Override |
| 171 | public <S, T> boolean isAvailable(Resource<S, T> resource) { |
| 172 | checkNotNull(resource); |
| 173 | |
| 174 | Optional<ResourceConsumer> consumer = store.getConsumer(resource); |
| 175 | return !consumer.isPresent(); |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Returns if the specified resource is in the resource range. |
| 180 | * E.g. VLAN ID against a link must be within 12 bit address space. |
| 181 | * |
| 182 | * @param resource resource to be checked if it is within the resource range |
| 183 | * @param <S> type of the subject |
| 184 | * @param <T> type of the resource |
| 185 | * @return true if the resource within the range, false otherwise |
| 186 | */ |
| 187 | private <S, T> boolean isValid(Resource<S, T> resource) { |
| 188 | // TODO: implement |
| 189 | return true; |
| 190 | } |
| 191 | } |