/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.ec2.compute.strategy;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.Iterables.getOnlyElement;
import java.util.NoSuchElementException;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.jclouds.aws.util.AWSUtils;
import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.compute.strategy.GetNodeMetadataStrategy;
import org.jclouds.ec2.EC2Client;
import org.jclouds.ec2.domain.RunningInstance;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
/**
*
* @author Adrian Cole
*/
@Singleton
public class EC2GetNodeMetadataStrategy implements GetNodeMetadataStrategy {
private final EC2Client client;
private final Function<RunningInstance, NodeMetadata> runningInstanceToNodeMetadata;
@Inject
protected EC2GetNodeMetadataStrategy(EC2Client client,
Function<RunningInstance, NodeMetadata> runningInstanceToNodeMetadata) {
this.client = checkNotNull(client, "client");
this.runningInstanceToNodeMetadata = checkNotNull(runningInstanceToNodeMetadata, "runningInstanceToNodeMetadata");
}
@Override
public NodeMetadata getNode(String id) {
checkNotNull(id, "id");
String[] parts = AWSUtils.parseHandle(id);
String region = parts[0];
String instanceId = parts[1];
try {
RunningInstance runningInstance = getRunningInstanceInRegion(region, instanceId);
return runningInstanceToNodeMetadata.apply(runningInstance);
} catch (NoSuchElementException e) {
return null;
}
}
public RunningInstance getRunningInstanceInRegion(String region, String id) {
return getOnlyElement(Iterables.concat(client.getInstanceServices().describeInstancesInRegion(region, id)));
}
}