org.apache.oodt.cas.filemgr.datatransfer.S3DataTransferer Maven / Gradle / Ivy

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The file management component of a Catalog and Archive Service. This component purposefully separates data stores and metadata stores as standard interfaces, and provides some out of the box backend implementations of them (including one based on the javax.sql.DataSource interface). This component provides everything that you need to catalog, archive and manage files, and directories, and their associated metadata.

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/*
 * 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.apache.oodt.cas.filemgr.datatransfer;

import static com.amazonaws.services.s3.model.ObjectMetadata.AES_256_SERVER_SIDE_ENCRYPTION;
import static com.google.common.base.Preconditions.checkNotNull;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;

import org.apache.oodt.cas.filemgr.structs.Product;
import org.apache.oodt.cas.filemgr.structs.Reference;
import org.apache.oodt.cas.filemgr.structs.exceptions.DataTransferException;
import org.apache.tika.io.IOUtils;

import com.amazonaws.AmazonClientException;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.model.DeleteObjectRequest;
import com.amazonaws.services.s3.model.GetObjectRequest;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.PutObjectRequest;
import com.amazonaws.services.s3.model.S3Object;
import com.amazonaws.services.s3.model.S3ObjectInputStream;

/**
 * {@link DataTransfer} which put/gets files in/from Amazon S3 storage.
 * 
 * @author [email protected] (Brian Foster)
 */
public class S3DataTransferer implements DataTransfer {

	private final AmazonS3 s3Client;
	private final String bucketName;
	private final boolean encrypt;

	public S3DataTransferer(AmazonS3 s3Client, String bucketName, boolean encrypt) {
		this.s3Client = checkNotNull(s3Client);
		this.bucketName = checkNotNull(bucketName);
		this.encrypt = encrypt;
	}

	@Override
	public void setFileManagerUrl(URL url) {}

	@Override
	public void transferProduct(Product product) throws DataTransferException, IOException {
		for (Reference ref : product.getProductReferences()) {
      String origRef = stripProtocol(ref.getOrigReference(), false);
		  String dataStoreRef = stripProtocol(ref.getDataStoreReference(), true);
			try {
			  PutObjectRequest request = new PutObjectRequest(
			      bucketName, dataStoreRef, new File(origRef));
			  if (encrypt) {
  				ObjectMetadata requestMetadata = new ObjectMetadata();
  				requestMetadata.setServerSideEncryption(AES_256_SERVER_SIDE_ENCRYPTION);     
  				request.setMetadata(requestMetadata);
			  }
        s3Client.putObject(request);
			} catch (AmazonClientException e) {
				throw new DataTransferException(String.format(
				    "Failed to upload product reference %s to S3 at %s", origRef,
				    dataStoreRef), e);
			}
		}
	}

	@Override
	public void retrieveProduct(Product product, File directory) throws DataTransferException,
	    IOException {
		for (Reference ref : product.getProductReferences()) {
      GetObjectRequest request = new GetObjectRequest(bucketName, stripProtocol(
          ref.getDataStoreReference(), true));
			S3Object file = s3Client.getObject(request);
			stageFile(file, ref, directory);
		}
	}

  @Override
  public void deleteProduct(Product product) throws DataTransferException, IOException {
    for (Reference ref : product.getProductReferences()) {
      DeleteObjectRequest request = new DeleteObjectRequest(bucketName, stripProtocol(
          ref.getDataStoreReference(), true));
      try {
        s3Client.deleteObject(request);
      } catch (AmazonClientException e) {
        throw new DataTransferException(String.format(
            "Failed to delete product reference %s from S3", ref.getDataStoreReference()), e);
      }
    }
  }

	private void stageFile(S3Object file, Reference ref, File directory) throws IOException {
		S3ObjectInputStream inStream = null;
		FileOutputStream outStream = null;
		try {
			inStream = file.getObjectContent();
			outStream = new FileOutputStream(new File(directory, new File(
			    stripProtocol(ref.getDataStoreReference(), false)).getName()));
			IOUtils.copy(inStream, outStream);
		} catch (IOException e) {
			throw e;
		} finally {
			try { inStream.close(); } catch (Exception e) {}
			try { outStream.close(); } catch (Exception e) {}
		}
	}

	private String stripProtocol(String ref, boolean stripLeadingSeparator) throws IOException {
	  try {
      String path = new URI(ref).getPath();
      if (stripLeadingSeparator) {
        path = path.replaceAll("^/", "");
      }
      return path;
    } catch (URISyntaxException e) {
      throw new IOException(e);
    }
	}
}