| 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.compute.strategy; |
| 20 | |
| 21 | import static com.google.common.base.Preconditions.checkNotNull; |
| 22 | import static com.google.common.base.Predicates.and; |
| 23 | import static com.google.common.base.Predicates.notNull; |
| 24 | import static com.google.common.collect.Iterables.concat; |
| 25 | import static com.google.common.collect.Iterables.filter; |
| 26 | import static com.google.common.collect.Iterables.transform; |
| 27 | import static org.jclouds.concurrent.FutureIterables.transformParallel; |
| 28 | |
| 29 | import java.util.Set; |
| 30 | import java.util.concurrent.ExecutorService; |
| 31 | import java.util.concurrent.Future; |
| 32 | |
| 33 | import javax.annotation.Resource; |
| 34 | import javax.inject.Inject; |
| 35 | import javax.inject.Named; |
| 36 | import javax.inject.Singleton; |
| 37 | |
| 38 | import org.jclouds.Constants; |
| 39 | import org.jclouds.compute.domain.ComputeMetadata; |
| 40 | import org.jclouds.compute.domain.NodeMetadata; |
| 41 | import org.jclouds.compute.predicates.NodePredicates; |
| 42 | import org.jclouds.compute.reference.ComputeServiceConstants; |
| 43 | import org.jclouds.compute.strategy.ListNodesStrategy; |
| 44 | import org.jclouds.ec2.EC2AsyncClient; |
| 45 | import org.jclouds.ec2.domain.Reservation; |
| 46 | import org.jclouds.ec2.domain.RunningInstance; |
| 47 | import org.jclouds.location.Region; |
| 48 | import org.jclouds.logging.Logger; |
| 49 | |
| 50 | import com.google.common.base.Function; |
| 51 | import com.google.common.base.Predicate; |
| 52 | import com.google.common.base.Supplier; |
| 53 | import com.google.common.collect.ImmutableSet; |
| 54 | |
| 55 | /** |
| 56 | * |
| 57 | * @author Adrian Cole |
| 58 | */ |
| 59 | @Singleton |
| 60 | public class EC2ListNodesStrategy implements ListNodesStrategy { |
| 61 | @Resource |
| 62 | @Named(ComputeServiceConstants.COMPUTE_LOGGER) |
| 63 | protected Logger logger = Logger.NULL; |
| 64 | |
| 65 | protected final EC2AsyncClient client; |
| 66 | protected final Supplier<Set<String>> regions; |
| 67 | protected final Function<RunningInstance, NodeMetadata> runningInstanceToNodeMetadata; |
| 68 | protected final ExecutorService executor; |
| 69 | |
| 70 | @Inject |
| 71 | protected EC2ListNodesStrategy(EC2AsyncClient client, @Region Supplier<Set<String>> regions, |
| 72 | Function<RunningInstance, NodeMetadata> runningInstanceToNodeMetadata, |
| 73 | @Named(Constants.PROPERTY_USER_THREADS) ExecutorService executor) { |
| 74 | this.client = checkNotNull(client, "client"); |
| 75 | this.regions = checkNotNull(regions, "regions"); |
| 76 | this.runningInstanceToNodeMetadata = checkNotNull(runningInstanceToNodeMetadata, "runningInstanceToNodeMetadata"); |
| 77 | this.executor = checkNotNull(executor, "executor"); |
| 78 | } |
| 79 | |
| 80 | @Override |
| 81 | public Set<? extends ComputeMetadata> listNodes() { |
| 82 | return listDetailsOnNodesMatching(NodePredicates.all()); |
| 83 | } |
| 84 | |
| 85 | @Override |
| 86 | public Set<? extends NodeMetadata> listDetailsOnNodesMatching(Predicate<ComputeMetadata> filter) { |
| 87 | Iterable<? extends RunningInstance> instances = pollRunningInstances(); |
| 88 | Iterable<? extends NodeMetadata> nodes = filter(transform(filter(instances, notNull()), |
| 89 | runningInstanceToNodeMetadata), and(notNull(), filter)); |
| 90 | return ImmutableSet.copyOf(nodes); |
| 91 | } |
| 92 | |
| 93 | protected Iterable<? extends RunningInstance> pollRunningInstances() { |
| 94 | Iterable<? extends Set<? extends Reservation<? extends RunningInstance>>> reservations = transformParallel( |
| 95 | regions.get(), new Function<String, Future<? extends Set<? extends Reservation<? extends RunningInstance>>>>() { |
| 96 | |
| 97 | @Override |
| 98 | public Future<Set<? extends Reservation<? extends RunningInstance>>> apply(String from) { |
| 99 | // see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7126754 |
| 100 | return castToSpecificTypedFuture(client.getInstanceServices().describeInstancesInRegion(from)); |
| 101 | } |
| 102 | |
| 103 | }, executor, null, logger, "reservations"); |
| 104 | |
| 105 | return concat(concat(reservations)); |
| 106 | } |
| 107 | |
| 108 | @SuppressWarnings("unchecked") |
| 109 | private static <T> Future<T> castToSpecificTypedFuture(Future<? extends T> input) { |
| 110 | return (Future<T>) input; |
| 111 | } |
| 112 | } |