org.jclouds.aws.ec2.compute.functions.RegionAndIdToImage.java Source code

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Here is the source code for org.jclouds.aws.ec2.compute.functions.RegionAndIdToImage.java

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/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
 *
 * ====================================================================
 * Licensed 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.aws.ec2.compute.functions;

import static org.jclouds.aws.ec2.options.DescribeImagesOptions.Builder.imageIds;

import javax.annotation.Resource;
import javax.inject.Inject;
import javax.inject.Singleton;

import org.jclouds.aws.ec2.EC2Client;
import org.jclouds.aws.ec2.compute.domain.RegionAndName;
import org.jclouds.compute.domain.Image;
import org.jclouds.logging.Logger;

import com.google.common.base.Function;
import com.google.common.collect.Iterables;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public final class RegionAndIdToImage implements Function<RegionAndName, Image> {
    @Resource
    protected Logger logger = Logger.NULL;

    private final ImageParser parser;
    private final EC2Client sync;

    @Inject
    public RegionAndIdToImage(ImageParser parser, EC2Client sync) {
        this.parser = parser;
        this.sync = sync;
    }

    public Image apply(RegionAndName key) {
        try {
            org.jclouds.aws.ec2.domain.Image image = Iterables.getOnlyElement(
                    sync.getAMIServices().describeImagesInRegion(key.getRegion(), imageIds(key.getName())));
            return parser.apply(image);
        } catch (Exception e) {
            logger.warn(e, "could not find image %s/%s: %s", key.getRegion(), key.getName(), e.getMessage());
            return null;
        }
    }
}