| 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.util.Map; |
| 22 | import java.util.Set; |
| 23 | |
| 24 | import javax.annotation.Resource; |
| 25 | import javax.inject.Inject; |
| 26 | import javax.inject.Singleton; |
| 27 | |
| 28 | import org.jclouds.ec2.EC2Client; |
| 29 | import org.jclouds.ec2.domain.AvailabilityZoneInfo; |
| 30 | import org.jclouds.ec2.services.AvailabilityZoneAndRegionClient; |
| 31 | import org.jclouds.http.HttpResponseException; |
| 32 | import org.jclouds.location.Region; |
| 33 | import org.jclouds.location.suppliers.RegionIdToZoneIdsSupplier; |
| 34 | import org.jclouds.logging.Logger; |
| 35 | import org.jclouds.util.Suppliers2; |
| 36 | |
| 37 | import com.google.common.base.Function; |
| 38 | import com.google.common.base.Supplier; |
| 39 | import com.google.common.collect.ImmutableMap; |
| 40 | import com.google.common.collect.ImmutableMap.Builder; |
| 41 | import com.google.common.collect.ImmutableSet; |
| 42 | import com.google.common.collect.Iterables; |
| 43 | import com.google.common.collect.Maps; |
| 44 | |
| 45 | @Singleton |
| 46 | public class DescribeAvailabilityZonesInRegion implements RegionIdToZoneIdsSupplier { |
| 47 | @Resource |
| 48 | protected Logger logger = Logger.NULL; |
| 49 | |
| 50 | private final AvailabilityZoneAndRegionClient client; |
| 51 | private final Supplier<Set<String>> regions; |
| 52 | |
| 53 | @Inject |
| 54 | public DescribeAvailabilityZonesInRegion(EC2Client client, @Region Supplier<Set<String>> regions) { |
| 55 | this.client = client.getAvailabilityZoneAndRegionServices(); |
| 56 | this.regions = regions; |
| 57 | } |
| 58 | |
| 59 | @Override |
| 60 | public Map<String, Supplier<Set<String>>> get() { |
| 61 | Builder<String, Set<String>> map = ImmutableMap.builder(); |
| 62 | HttpResponseException exception = null; |
| 63 | // TODO: this should be parallel |
| 64 | for (String region : regions.get()) { |
| 65 | try { |
| 66 | ImmutableSet<String> zones = ImmutableSet.copyOf(Iterables.transform(client |
| 67 | .describeAvailabilityZonesInRegion(region), new Function<AvailabilityZoneInfo, String>() { |
| 68 | |
| 69 | @Override |
| 70 | public String apply(AvailabilityZoneInfo arg0) { |
| 71 | return arg0.getZone(); |
| 72 | } |
| 73 | |
| 74 | })); |
| 75 | if (zones.size() > 0) |
| 76 | map.put(region, zones); |
| 77 | } catch (HttpResponseException e) { |
| 78 | // TODO: this should be in retry handler, not here. |
| 79 | if (e.getMessage().contains("Unable to tunnel through proxy")) { |
| 80 | exception = e; |
| 81 | logger.error(e, "Could not describe availability zones in Region: %s", region); |
| 82 | } else { |
| 83 | throw e; |
| 84 | } |
| 85 | } |
| 86 | } |
| 87 | ImmutableMap<String, Set<String>> result = map.build(); |
| 88 | if (result.isEmpty() && exception != null) { |
| 89 | throw exception; |
| 90 | } |
| 91 | return Maps.transformValues(result, Suppliers2.<Set<String>> ofInstanceFunction()); |
| 92 | } |
| 93 | |
| 94 | } |