| 1 | /** |
| 2 | * Licensed to jclouds, Inc. (jclouds) under one or more |
| 3 | * contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. jclouds licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.jclouds.compute.predicates; |
| 20 | |
| 21 | import static com.google.common.base.Preconditions.checkNotNull; |
| 22 | |
| 23 | import java.util.Set; |
| 24 | |
| 25 | import org.jclouds.compute.domain.ComputeMetadata; |
| 26 | import org.jclouds.compute.domain.NodeMetadata; |
| 27 | import org.jclouds.compute.domain.NodeState; |
| 28 | import org.jclouds.util.Preconditions2; |
| 29 | |
| 30 | import com.google.common.base.Predicate; |
| 31 | import com.google.common.base.Predicates; |
| 32 | import com.google.common.collect.ImmutableSet; |
| 33 | |
| 34 | /** |
| 35 | * Container for node filters (predicates). |
| 36 | * |
| 37 | * This class has static methods that create customized predicates to use with |
| 38 | * {@link org.jclouds.compute.ComputeService}. |
| 39 | * |
| 40 | * @author Oleksiy Yarmula |
| 41 | */ |
| 42 | public class NodePredicates { |
| 43 | |
| 44 | private static class ParentLocationId implements Predicate<ComputeMetadata> { |
| 45 | private final String id; |
| 46 | |
| 47 | private ParentLocationId(String id) { |
| 48 | this.id = id; |
| 49 | } |
| 50 | |
| 51 | @Override |
| 52 | public int hashCode() { |
| 53 | final int prime = 31; |
| 54 | int result = 1; |
| 55 | result = prime * result + ((id == null) ? 0 : id.hashCode()); |
| 56 | return result; |
| 57 | } |
| 58 | |
| 59 | @Override |
| 60 | public boolean equals(Object obj) { |
| 61 | if (this == obj) |
| 62 | return true; |
| 63 | if (obj == null) |
| 64 | return false; |
| 65 | if (getClass() != obj.getClass()) |
| 66 | return false; |
| 67 | ParentLocationId other = (ParentLocationId) obj; |
| 68 | if (id == null) { |
| 69 | if (other.id != null) |
| 70 | return false; |
| 71 | } else if (!id.equals(other.id)) |
| 72 | return false; |
| 73 | return true; |
| 74 | } |
| 75 | |
| 76 | @Override |
| 77 | public boolean apply(ComputeMetadata nodeMetadata) { |
| 78 | if (nodeMetadata.getLocation().getParent() == null) |
| 79 | return false; |
| 80 | return id.equals(nodeMetadata.getLocation().getParent().getId()); |
| 81 | } |
| 82 | |
| 83 | @Override |
| 84 | public String toString() { |
| 85 | return "ParentLocationId [id=" + id + "]"; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | private static class LocationId implements Predicate<ComputeMetadata> { |
| 90 | @Override |
| 91 | public int hashCode() { |
| 92 | final int prime = 31; |
| 93 | int result = 1; |
| 94 | result = prime * result + ((id == null) ? 0 : id.hashCode()); |
| 95 | return result; |
| 96 | } |
| 97 | |
| 98 | @Override |
| 99 | public boolean equals(Object obj) { |
| 100 | if (this == obj) |
| 101 | return true; |
| 102 | if (obj == null) |
| 103 | return false; |
| 104 | if (getClass() != obj.getClass()) |
| 105 | return false; |
| 106 | LocationId other = (LocationId) obj; |
| 107 | if (id == null) { |
| 108 | if (other.id != null) |
| 109 | return false; |
| 110 | } else if (!id.equals(other.id)) |
| 111 | return false; |
| 112 | return true; |
| 113 | } |
| 114 | |
| 115 | private final String id; |
| 116 | |
| 117 | private LocationId(String id) { |
| 118 | this.id = id; |
| 119 | } |
| 120 | |
| 121 | @Override |
| 122 | public boolean apply(ComputeMetadata nodeMetadata) { |
| 123 | return id.equals(nodeMetadata.getLocation().getId()); |
| 124 | } |
| 125 | |
| 126 | @Override |
| 127 | public String toString() { |
| 128 | return "locationId(" + id + ")"; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Return nodes in the specified location. |
| 134 | * |
| 135 | * @param id |
| 136 | * id of the location |
| 137 | * @return predicate |
| 138 | */ |
| 139 | public static Predicate<ComputeMetadata> locationId(final String id) { |
| 140 | checkNotNull(id, "id must be defined"); |
| 141 | return new LocationId(id); |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Return nodes in the specified parent location. |
| 146 | * |
| 147 | * @param id |
| 148 | * id of the location |
| 149 | * @return predicate |
| 150 | */ |
| 151 | public static Predicate<ComputeMetadata> parentLocationId(final String id) { |
| 152 | checkNotNull(id, "id must be defined"); |
| 153 | return new ParentLocationId(id); |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Return nodes with the specific ids Note: returns all nodes, regardless of the state. |
| 158 | * |
| 159 | * @param ids |
| 160 | * ids of the resources |
| 161 | * @return predicate |
| 162 | */ |
| 163 | public static <T extends ComputeMetadata> Predicate<T> withIds(String... ids) { |
| 164 | checkNotNull(ids, "ids must be defined"); |
| 165 | final Set<String> search = ImmutableSet.copyOf(ids); |
| 166 | return new Predicate<T>() { |
| 167 | @Override |
| 168 | public boolean apply(T nodeMetadata) { |
| 169 | return search.contains(nodeMetadata.getId()); |
| 170 | } |
| 171 | |
| 172 | @Override |
| 173 | public String toString() { |
| 174 | return "withIds(" + search + ")"; |
| 175 | } |
| 176 | }; |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * return everything. |
| 181 | */ |
| 182 | public static Predicate<ComputeMetadata> all() { |
| 183 | return Predicates.<ComputeMetadata> alwaysTrue(); |
| 184 | } |
| 185 | |
| 186 | /** |
| 187 | * Return nodes in the specified group. Note: returns all nodes, regardless of the state. |
| 188 | * |
| 189 | * @param group |
| 190 | * group to match the items |
| 191 | * @return predicate |
| 192 | */ |
| 193 | public static Predicate<NodeMetadata> inGroup(final String group) { |
| 194 | Preconditions2.checkNotEmpty(group, "group must be defined"); |
| 195 | return new Predicate<NodeMetadata>() { |
| 196 | @Override |
| 197 | public boolean apply(NodeMetadata nodeMetadata) { |
| 198 | return group.equals(nodeMetadata.getGroup()); |
| 199 | } |
| 200 | |
| 201 | @Override |
| 202 | public String toString() { |
| 203 | return "inGroup(" + group + ")"; |
| 204 | } |
| 205 | }; |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * |
| 210 | * @see #inGroup(String) |
| 211 | */ |
| 212 | @Deprecated |
| 213 | public static Predicate<NodeMetadata> withTag(final String tag) { |
| 214 | return inGroup(tag); |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * Return nodes with specified group that are in the NODE_RUNNING state. |
| 219 | * |
| 220 | * @param group |
| 221 | * group to match the items |
| 222 | * @return predicate |
| 223 | */ |
| 224 | public static Predicate<NodeMetadata> runningInGroup(final String group) { |
| 225 | Preconditions2.checkNotEmpty(group, "group must be defined"); |
| 226 | return new Predicate<NodeMetadata>() { |
| 227 | @Override |
| 228 | public boolean apply(NodeMetadata nodeMetadata) { |
| 229 | return group.equals(nodeMetadata.getGroup()) && nodeMetadata.getState() == NodeState.RUNNING; |
| 230 | } |
| 231 | |
| 232 | @Override |
| 233 | public String toString() { |
| 234 | return "runningInGroup(" + group + ")"; |
| 235 | } |
| 236 | }; |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * |
| 241 | * @see #inGroup(String) |
| 242 | */ |
| 243 | @Deprecated |
| 244 | public static Predicate<NodeMetadata> runningWithTag(final String tag) { |
| 245 | return runningInGroup(tag); |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * Match nodes with State == RUNNING |
| 250 | */ |
| 251 | public static final Predicate<NodeMetadata> RUNNING = new Predicate<NodeMetadata>() { |
| 252 | @Override |
| 253 | public boolean apply(NodeMetadata nodeMetadata) { |
| 254 | return nodeMetadata.getState() == NodeState.RUNNING; |
| 255 | } |
| 256 | |
| 257 | @Override |
| 258 | public String toString() { |
| 259 | return "RUNNING"; |
| 260 | } |
| 261 | }; |
| 262 | |
| 263 | /** |
| 264 | * Match nodes with State == NODE_TERMINATED |
| 265 | */ |
| 266 | public static final Predicate<NodeMetadata> TERMINATED = new Predicate<NodeMetadata>() { |
| 267 | @Override |
| 268 | public boolean apply(NodeMetadata nodeMetadata) { |
| 269 | return nodeMetadata.getState() == NodeState.TERMINATED; |
| 270 | } |
| 271 | |
| 272 | @Override |
| 273 | public String toString() { |
| 274 | return "TERMINATED"; |
| 275 | } |
| 276 | }; |
| 277 | |
| 278 | } |