org.jclouds.aws.s3.blobstore.functions.BucketToResourceMetadata.java Source code

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Here is the source code for org.jclouds.aws.s3.blobstore.functions.BucketToResourceMetadata.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.s3.blobstore.functions;

import java.util.NoSuchElementException;
import java.util.Set;

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

import org.jclouds.aws.s3.S3Client;
import org.jclouds.aws.s3.domain.BucketMetadata;
import org.jclouds.blobstore.ContainerNotFoundException;
import org.jclouds.blobstore.domain.MutableStorageMetadata;
import org.jclouds.blobstore.domain.StorageMetadata;
import org.jclouds.blobstore.domain.StorageType;
import org.jclouds.blobstore.domain.internal.MutableStorageMetadataImpl;
import org.jclouds.collect.Memoized;
import org.jclouds.domain.Location;
import org.jclouds.logging.Logger;

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

/**
 * @author Adrian Cole
 */
@Singleton
public class BucketToResourceMetadata implements Function<BucketMetadata, StorageMetadata> {
    private final S3Client client;
    private final Location onlyLocation;
    private final Supplier<Set<? extends Location>> locations;

    @Resource
    protected Logger logger = Logger.NULL;

    @Inject
    BucketToResourceMetadata(S3Client client, @Memoized Supplier<Set<? extends Location>> locations) {
        this.client = client;
        this.onlyLocation = locations.get().size() == 1 ? Iterables.get(locations.get(), 0) : null;
        this.locations = locations;
    }

    public StorageMetadata apply(BucketMetadata from) {
        MutableStorageMetadata to = new MutableStorageMetadataImpl();
        to.setName(from.getName());
        to.setType(StorageType.CONTAINER);
        to.setLocation(onlyLocation != null ? onlyLocation : getLocation(from));
        return to;
    }

    private Location getLocation(BucketMetadata from) {
        try {
            Set<? extends Location> locations = this.locations.get();
            final String region = client.getBucketLocation(from.getName());
            assert region != null : String.format("could not get region for %s", from.getName());
            if (region != null) {
                try {
                    return Iterables.find(locations, new Predicate<Location>() {

                        @Override
                        public boolean apply(Location input) {
                            return input.getId().equalsIgnoreCase(region.toString());
                        }

                    });
                } catch (NoSuchElementException e) {
                    logger.error("could not get location for region %s in %s", region, locations);
                }
            } else {
                logger.error("could not get region for %s", from.getName());
            }
        } catch (ContainerNotFoundException e) {
            logger.error(e, "could not get region for %s, as service suggests the bucket doesn't exist",
                    from.getName());
        }
        return null;
    }
}