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S3BlobStore.java
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/
S3BlobStore.java
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/*
* Copyright (c) 2013 Nigel Duffy
*
* 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.nickelproject.nickel.blobStore;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.io.IOUtils;
import org.nickelproject.util.RethrownException;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.model.AmazonS3Exception;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.PutObjectRequest;
import com.google.inject.Inject;
import com.google.inject.name.Named;
public class S3BlobStore extends BlobStoreBase {
private static final int notFoundCode = 404;
private final AmazonS3 s3Client;
private final String bucketName;
@Inject
S3BlobStore(final AmazonS3 s3Client,
@Named("BucketName") final String bucketName,
@Named("CheckContainsThreshold") final long checkContainsThreshold) {
super(checkContainsThreshold);
this.bucketName = bucketName;
this.s3Client = s3Client;
}
@Override
public final byte[] get(final BlobRef blobRef) {
InputStream inputStream = null;
try {
inputStream = getAsStream(blobRef);
return inputStream == null ? null : IOUtils.toByteArray(getAsStream(blobRef));
} catch (final IOException e) {
throw RethrownException.rethrow(e);
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (final IOException e) {
throw RethrownException.rethrow(e);
}
}
}
}
@Override
public final boolean contains(final BlobRef blobRef) {
boolean retVal = true;
try {
s3Client.getObjectMetadata(bucketName, blobRef.toString());
} catch (final AmazonS3Exception e) {
if (e.getStatusCode() == notFoundCode) {
retVal = false;
} else {
throw RethrownException.rethrow(e);
}
}
return retVal;
}
@Override
public final InputStream getAsStream(final BlobRef blobRef) {
return contains(blobRef) ? s3Client.getObject(bucketName, blobRef.toString()).getObjectContent() : null;
}
@Override
public final void putByteArray(final BlobRef blobRef, final byte[] pBytes) {
final ByteArrayInputStream vByteArrayInputStream = new ByteArrayInputStream(pBytes);
final ObjectMetadata vMetadata = new ObjectMetadata();
vMetadata.setContentLength(pBytes.length);
s3Client.putObject(new PutObjectRequest(bucketName, blobRef.toString(), vByteArrayInputStream, vMetadata));
}
}