| /** |
| * Licensed to jclouds, Inc. (jclouds) under one or more |
| * contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. jclouds licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.jclouds.elb.loadbalancer.strategy; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.jclouds.aws.util.AWSUtils.getRegionFromLocationOrNull; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| |
| import javax.annotation.Resource; |
| import javax.inject.Inject; |
| import javax.inject.Named; |
| import javax.inject.Singleton; |
| |
| import org.jclouds.compute.domain.NodeMetadata; |
| import org.jclouds.domain.Location; |
| import org.jclouds.elb.ELBClient; |
| import org.jclouds.elb.domain.LoadBalancer; |
| import org.jclouds.loadbalancer.domain.LoadBalancerMetadata; |
| import org.jclouds.loadbalancer.reference.LoadBalancerConstants; |
| import org.jclouds.loadbalancer.strategy.LoadBalanceNodesStrategy; |
| import org.jclouds.logging.Logger; |
| |
| import com.google.common.base.Function; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Lists; |
| |
| /** |
| * |
| * @author Adrian Cole |
| */ |
| @Singleton |
| public class ELBLoadBalanceNodesStrategy implements LoadBalanceNodesStrategy { |
| @Resource |
| @Named(LoadBalancerConstants.LOADBALANCER_LOGGER) |
| protected Logger logger = Logger.NULL; |
| protected final ELBClient client; |
| protected final Function<LoadBalancer, LoadBalancerMetadata> converter; |
| |
| @Inject |
| protected ELBLoadBalanceNodesStrategy(ELBClient client, Function<LoadBalancer, LoadBalancerMetadata> converter) { |
| this.client = checkNotNull(client, "client"); |
| this.converter = checkNotNull(converter, "converter"); |
| } |
| |
| @Override |
| public LoadBalancerMetadata createLoadBalancerInLocation(Location location, String name, String protocol, |
| int loadBalancerPort, int instancePort, Iterable<? extends NodeMetadata> nodes) { |
| checkNotNull(location, "location"); |
| String region = getRegionFromLocationOrNull(location); |
| |
| List<String> availabilityZones = Lists.newArrayList(Iterables.transform(nodes, |
| new Function<NodeMetadata, String>() { |
| |
| @Override |
| public String apply(NodeMetadata from) { |
| return from.getLocation().getId(); |
| } |
| })); |
| |
| client.createLoadBalancerInRegion(region, name, protocol, loadBalancerPort, instancePort, |
| availabilityZones.toArray(new String[] {})); |
| |
| List<String> instanceIds = Lists.newArrayList(Iterables.transform(nodes, new Function<NodeMetadata, String>() { |
| |
| @Override |
| public String apply(NodeMetadata from) { |
| return from.getProviderId(); |
| } |
| })); |
| |
| String[] instanceIdArray = instanceIds.toArray(new String[] {}); |
| |
| Set<String> registeredInstanceIds = client.registerInstancesWithLoadBalancerInRegion(region, name, |
| instanceIdArray); |
| |
| // deregister instances |
| boolean changed = registeredInstanceIds.removeAll(instanceIds); |
| if (changed) { |
| List<String> list = new ArrayList<String>(registeredInstanceIds); |
| instanceIdArray = new String[list.size()]; |
| for (int i = 0; i < list.size(); i++) { |
| instanceIdArray[i] = list.get(i); |
| } |
| if (instanceIdArray.length > 0) |
| client.deregisterInstancesWithLoadBalancerInRegion(region, name, instanceIdArray); |
| } |
| return converter.apply(Iterables.getOnlyElement(client.describeLoadBalancersInRegion(region, name))); |
| } |
| } |