| 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.ec2.suppliers; |
| 20 | |
| 21 | import java.net.URI; |
| 22 | import java.util.Map; |
| 23 | import java.util.Set; |
| 24 | |
| 25 | import javax.inject.Inject; |
| 26 | import javax.inject.Singleton; |
| 27 | |
| 28 | import org.jclouds.ec2.EC2Client; |
| 29 | import org.jclouds.ec2.services.AvailabilityZoneAndRegionClient; |
| 30 | import org.jclouds.location.Region; |
| 31 | import org.jclouds.location.suppliers.RegionIdToURISupplier; |
| 32 | import org.jclouds.util.Suppliers2; |
| 33 | |
| 34 | import com.google.common.base.Predicates; |
| 35 | import com.google.common.base.Supplier; |
| 36 | import com.google.common.collect.Maps; |
| 37 | |
| 38 | @Singleton |
| 39 | public class DescribeRegionsForConfiguredRegions implements RegionIdToURISupplier { |
| 40 | private final AvailabilityZoneAndRegionClient client; |
| 41 | private final Supplier<Set<String>> regions; |
| 42 | |
| 43 | @Inject |
| 44 | public DescribeRegionsForConfiguredRegions(EC2Client client, @Region Supplier<Set<String>> regions) { |
| 45 | this.client = client.getAvailabilityZoneAndRegionServices(); |
| 46 | this.regions = regions; |
| 47 | } |
| 48 | |
| 49 | @Singleton |
| 50 | @Region |
| 51 | @Override |
| 52 | public Map<String, Supplier<URI>> get() { |
| 53 | Set<String> regionWhiteList = regions.get(); |
| 54 | Map<String, URI> regionToUris = client.describeRegions(); |
| 55 | if (regionWhiteList.size() > 0) |
| 56 | regionToUris = Maps.filterKeys(regionToUris, Predicates.in(regionWhiteList)); |
| 57 | return Maps.transformValues(regionToUris, Suppliers2.<URI> ofInstanceFunction()); |
| 58 | } |
| 59 | } |