gr.abiss.calipso.fs.S3FilePersistenceServiceImpl.java Source code

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Here is the source code for gr.abiss.calipso.fs.S3FilePersistenceServiceImpl.java

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/**
 * calipso-hub-framework - A full stack, high level framework for lazy application hackers.
 * Copyright  2005 Manos Batsis (manosbatsis gmail)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package gr.abiss.calipso.fs;

import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Field;

import javax.annotation.PostConstruct;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.CannedAccessControlList;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.PutObjectRequest;

/**
 * An implementation of {@link FilePersistenceService} that uses Amazon S3 for
 * file storage. Configuration properties from dev.properties:
 * 
 * build.aws_access_key_id=
 * build.aws_secret_access_key=
 * build.aws_namecard_bucket=:
 * 
 * from bean config: awsAccessKey, awsSecretAccessKey, nameCardBucket
 * 
 */
public class S3FilePersistenceServiceImpl implements FilePersistenceService {

    private static final Logger LOGGER = LoggerFactory.getLogger(S3FilePersistenceServiceImpl.class);

    @Value("${aws_namecard_bucket}")
    private String nameCardBucket;

    @Value("${aws_access_key_id}")
    private String awsAccessKey;

    @Value("${aws_secret_access_key}")
    private String awsSecretAccessKey;

    private AmazonS3Client s3Client;

    @PostConstruct
    public void postConstruct() {
        // create S3 credentials
        BasicAWSCredentials credentials = new BasicAWSCredentials(awsAccessKey, awsSecretAccessKey);
        // setup client
        this.s3Client = new AmazonS3Client(credentials);
        LOGGER.debug("Created S3 client");
    }

    /**
     * Save file in S3
     * @see gr.abiss.calipso.fs.FilePersistenceService#saveFile(java.io.InputStream, long, java.lang.String, java.lang.String)
     */
    @Override
    public String saveFile(InputStream in, long contentLength, String contentType, String path) {
        String url;
        // create metadata
        ObjectMetadata meta = new ObjectMetadata();
        meta.setContentLength(contentLength);
        meta.setContentType(contentType);

        // save to bucket
        s3Client.putObject(new PutObjectRequest(nameCardBucket, path, in, meta)
                .withCannedAcl(CannedAccessControlList.PublicRead));
        // set the URL to return
        url = s3Client.getUrl(nameCardBucket, path).toString();
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("File saved: " + path + ", size: " + contentLength + ", contentType: " + contentType);
        }
        return url;
    }

}