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Java example source code file (S3Uploader.java)

This example Java source code file (S3Uploader.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abortmultipartuploadrequest, amazons3, amazons3client, completemultipartuploadrequest, initiatemultipartuploadrequest, initiatemultipartuploadresult, list, multiplefileupload, putobjectrequest, set, string, transfermanager, uploadpartrequest, util

The S3Uploader.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    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.deeplearning4j.aws.s3.uploader;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import com.amazonaws.services.s3.model.*;
import com.amazonaws.services.s3.transfer.MultipleFileUpload;
import com.amazonaws.services.s3.transfer.TransferManager;
import com.amazonaws.services.s3.transfer.Upload;
import org.deeplearning4j.aws.s3.BaseS3;

import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;

/**
 * Uploads files to S3
 * 
 * @see {@link BaseS3}
 * @author Adam Gibson
 *
 */
public class S3Uploader extends BaseS3 {


    /**
     * Multi part upload for big files
     * @param file the file to upload
     * @param bucketName the bucket name to upload
     */
    public void multiPartUpload(File file,String bucketName) {
        AmazonS3 client = new AmazonS3Client(creds);
        bucketName = ensureValidBucketName(bucketName);

        List<Bucket> buckets = client.listBuckets();
        for(Bucket b : buckets)
            if(b.getName().equals(bucketName)) {
                doMultiPart(client,bucketName,file);
                return;
            }

        //bucket didn't exist: create it
        client.createBucket(bucketName);
        doMultiPart(client,bucketName, file);
    }

    /**
     * Upload the file to the bucket.
     * Will create the bucket if it hasn't already been created
     * @param file the file to upload
     * @param bucketName the name of the bucket
     */
	public void upload(File file,String bucketName) {
		AmazonS3 client = new AmazonS3Client(creds);
		bucketName = ensureValidBucketName(bucketName);

		List<Bucket> buckets = client.listBuckets();
		for(Bucket b : buckets) 
			if(b.getName().equals(bucketName)) {
				client.putObject(bucketName, file.getName(), file);
				return;
			}
		
		//bucket didn't exist: create it
		client.createBucket(bucketName);
		client.putObject(bucketName, file.getName(), file);
		
	}

    private void doMultiPart(AmazonS3 s3Client,String bucketName,File file) {
        // Create a list of UploadPartResponse objects. You get one of these
        // for each part upload.
        List<PartETag> partETags = new ArrayList<>();

        // Step 1: Initialize.
        InitiateMultipartUploadRequest initRequest = new
                InitiateMultipartUploadRequest(bucketName, file.getName());
        InitiateMultipartUploadResult initResponse =
                s3Client.initiateMultipartUpload(initRequest);

        long contentLength = file.length();
        long partSize = 5242880; // Set part size to 5 MB.

        try {
            // Step 2: Upload parts.
            long filePosition = 0;
            for (int i = 1; filePosition < contentLength; i++) {
                // Last part can be less than 5 MB. Adjust part size.
                partSize = Math.min(partSize, (contentLength - filePosition));

                // Create request to upload a part.
                UploadPartRequest uploadRequest = new UploadPartRequest()
                        .withBucketName(bucketName).withKey(file.getName())
                        .withUploadId(initResponse.getUploadId()).withPartNumber(i)
                        .withFileOffset(filePosition)
                        .withFile(file)
                        .withPartSize(partSize);

                // Upload part and add response to our list.
                partETags.add(
                        s3Client.uploadPart(uploadRequest).getPartETag());

                filePosition += partSize;
            }

            // Step 3: Complete.
            CompleteMultipartUploadRequest compRequest = new
                    CompleteMultipartUploadRequest(
                    bucketName,
                    file.getName(),
                    initResponse.getUploadId(),
                    partETags);

            s3Client.completeMultipartUpload(compRequest);
        } catch (Exception e) {
            s3Client.abortMultipartUpload(new AbortMultipartUploadRequest(
                    bucketName, file.getName(), initResponse.getUploadId()));
        }
    }

	private String ensureValidBucketName(String bucketName) {
		String formatted = bucketName.replaceAll("\\s+","_");
		int length = bucketName.length();
		if(length >= 62)
			length = 62;
		formatted = formatted.substring(0,length);
		formatted = formatted.replace(".","d");
		formatted = formatted.toLowerCase();
		if(formatted.endsWith("-"))
			formatted = formatted.substring(0,length - 1);
		
		return formatted;
	}
	
	public void upload(File file,String name,String bucketName) {
		AmazonS3 client = getClient();
		bucketName = ensureValidBucketName(bucketName);
		List<Bucket> buckets = client.listBuckets();
	//	ObjectMetadata med = new ObjectMetadata();
//		med.setContentLength(fileLength);
		for(Bucket b : buckets)
			if(b.getName().equals(bucketName)) {
				//client.putObject(bucketName, name, is, med);
				client.putObject(new PutObjectRequest(bucketName, name, file));
				return;
			}
		
		//bucket didn't exist: createComplex it
		client.createBucket(bucketName);
		//client.putObject(bucketName, name, is, med);
		client.putObject(new PutObjectRequest(bucketName, name, file));
	}
	

	public MultipleFileUpload uploadFolder(String bucketName, String keyPrefix,  File folderPath, boolean includeSubDir) {
		TransferManager transfer = new TransferManager(getClient());
		return transfer.uploadDirectory(bucketName, keyPrefix, folderPath, includeSubDir);
	}

	public MultipleFileUpload uploadFileList(String bucketName, File folderPath, List<File> fileList, String keyPrefix){
		TransferManager transfer = new TransferManager(getClient());
		return transfer.uploadFileList(bucketName, keyPrefix, folderPath, fileList);
	}


}

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