Java S3Object類代碼示例

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
public ExternalResourceMetaData getMetaData(URI location, boolean revalidate) {
    LOGGER.debug("Attempting to get resource metadata: {}", location);
    S3Object s3Object = s3Client.getMetaData(location);
    if (s3Object == null) {
        return null;
    }
    try {
        ObjectMetadata objectMetadata = s3Object.getObjectMetadata();
        return new DefaultExternalResourceMetaData(location,
            objectMetadata.getLastModified().getTime(),
            objectMetadata.getContentLength(),
            objectMetadata.getContentType(),
            objectMetadata.getETag(),
            null); // Passing null for sha1 - TODO - consider using the etag which is an MD5 hash of the file (when less than 5Gb)
    } finally {
        IoActions.closeQuietly(s3Object);
    }
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
@Override
public S3Object getObject(GetObjectRequest getObjectRequest)
        throws AmazonClientException, AmazonServiceException {
    // in ESBlobStoreContainerTestCase.java, the prefix is empty,
    // so the key and blobName are equivalent to each other
    String blobName = getObjectRequest.getKey();

    if (!blobs.containsKey(blobName)) {
        throw new AmazonS3Exception("[" + blobName + "] does not exist.");
    }

    // the HTTP request attribute is irrelevant for reading
    S3ObjectInputStream stream = new S3ObjectInputStream(
            blobs.get(blobName), null, false);
    S3Object s3Object = new S3Object();
    s3Object.setObjectContent(stream);
    return s3Object;
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
private S3Object doGetS3Object(URI uri, boolean isLightWeight) {
    S3RegionalResource s3RegionalResource = new S3RegionalResource(uri);
    String bucketName = s3RegionalResource.getBucketName();
    String s3BucketKey = s3RegionalResource.getKey();
    configureClient(s3RegionalResource);

    GetObjectRequest getObjectRequest = new GetObjectRequest(bucketName, s3BucketKey);
    if (isLightWeight) {
        //Skip content download
        getObjectRequest.setRange(0, 0);
    }

    try {
        return amazonS3Client.getObject(getObjectRequest);
    } catch (AmazonServiceException e) {
        String errorCode = e.getErrorCode();
        if (null != errorCode && errorCode.equalsIgnoreCase("NoSuchKey")) {
            return null;
        }
        throw ResourceExceptions.getFailed(uri, e);
    }
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
/**
 * Performs a {@link GetObjectRequest} to the S3 bucket by file id for the file
 *
 * @param fileLocationId Id of the file to search for
 * @return file found from S3
 */
@Override
public InputStream getFileByLocationId(String fileLocationId) {
	final String bucketName = environment.getProperty(Constants.BUCKET_NAME_ENV_VARIABLE);
	if (Strings.isNullOrEmpty(bucketName)) {
		API_LOG.warn("No bucket name is specified.");
		return null;
	}

	GetObjectRequest getObjectRequest = new GetObjectRequest(bucketName, fileLocationId);

	S3Object s3Object = amazonS3.getObject(getObjectRequest);

	API_LOG.info("Successfully retrieved the file from S3 bucket {}", getObjectRequest.getBucketName());

	return s3Object.getObjectContent();
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
@Override
public InputStream readBlob(String blobName) throws IOException {
    int retry = 0;
    while (retry <= blobStore.numberOfRetries()) {
        try {
            S3Object s3Object = SocketAccess.doPrivileged(() -> blobStore.client().getObject(blobStore.bucket(), buildKey(blobName)));
            return s3Object.getObjectContent();
        } catch (AmazonClientException e) {
            if (blobStore.shouldRetry(e) && (retry < blobStore.numberOfRetries())) {
                retry++;
            } else {
                if (e instanceof AmazonS3Exception) {
                    if (404 == ((AmazonS3Exception) e).getStatusCode()) {
                        throw new NoSuchFileException("Blob object [" + blobName + "] not found: " + e.getMessage());
                    }
                }
                throw e;
            }
        }
    }
    throw new BlobStoreException("retries exhausted while attempting to access blob object [name:" + blobName + ", bucket:" + blobStore.bucket() + "]");
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
/**
 * Tests if an object can be uploaded asynchronously
 *
 * @throws Exception not expected
 */
@Test
public void shouldUploadInParallel() throws Exception {
  final File uploadFile = new File(UPLOAD_FILE_NAME);

  s3Client.createBucket(BUCKET_NAME);

  final TransferManager transferManager = createDefaultTransferManager();
  final Upload upload =
      transferManager.upload(new PutObjectRequest(BUCKET_NAME, UPLOAD_FILE_NAME, uploadFile));
  final UploadResult uploadResult = upload.waitForUploadResult();

  assertThat(uploadResult.getKey(), equalTo(UPLOAD_FILE_NAME));

  final S3Object getResult = s3Client.getObject(BUCKET_NAME, UPLOAD_FILE_NAME);
  assertThat(getResult.getKey(), equalTo(UPLOAD_FILE_NAME));
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
private void writeLocalFile(
        final S3Object s3Object, 
        final File file) {

    try(FileOutputStream fileOutputStream 
            = new FileOutputStream(file)) {

        IOUtils.copy(
                s3Object.getObjectContent(), 
                fileOutputStream);
        
    } catch (IOException ioException) {
        throw new SecretsLockerException(
                ioException);
    }

    file.deleteOnExit();
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
/**
 * Get the original inventory report from S3, unzip it, and transfer it into a String format.
 * @return inventReport String
 * @throws IOException when getting object from S3 fails
 * or the checksum of the inventory report and the checksum specified in the manifest file not match
 */
public String getInventoryReportToString() throws IOException {
    String inventReportKey = locator.getKey();
    String bucketName = inventoryManifest.getSourceBucket();

    try (S3Object s3InventoryReport = s3Client.getObject(
            new GetObjectRequest(bucketName, inventReportKey))) {
        InputStream objectData = s3InventoryReport.getObjectContent();
        byte[] zippedData = IOUtils.toByteArray(objectData);
        String actualChecksum = DigestUtils.md5Hex(zippedData);
        String expectedChecksum = locator.getMD5checksum();
        if (!actualChecksum.equals(expectedChecksum)) {
            throw new ChecksumMismatchException (expectedChecksum, actualChecksum);
        }
        return IOUtils.toString(new GZIPInputStream(new ByteArrayInputStream(zippedData)));
    }
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
/**
 * Check if the MD5s of manifest.json and manifest.checksum equal
 * if so, pull out the manifest file and map it into a POJO
 * @return inventoryManifestStorage InventoryManifest, which stores all the elements of the manifest.json file
 */
public InventoryManifest getInventoryManifest() throws Exception {
    // Get manifest.json and transfer it to String
    GetObjectRequest requestJson = new GetObjectRequest(bucketName, bucketKeyJson);
    S3Object jsonObject = s3Client.getObject(requestJson);
    String jsonFile = inputStreamToString(jsonObject.getObjectContent());
    jsonObject.close();

    // Get manifest.checksum and transfer it to String with no whitespace
    GetObjectRequest requestChecksum = new GetObjectRequest(bucketName, bucketKeyChecksum);
    S3Object checksumObject = s3Client.getObject(requestChecksum);
    String expectedChecksum = inputStreamToString(checksumObject.getObjectContent())
            .replaceAll("\\s","");
    checksumObject.close();

    // Compare manifest.json and manifest.checksum's MD5 value
    String actualChecksum = DigestUtils.md5Hex(jsonFile);
    if (!actualChecksum.equals(expectedChecksum)) {
        throw new ChecksumMismatchException (expectedChecksum, actualChecksum);
    }

    return mapper.readValue(jsonFile, InventoryManifest.class);
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
@SuppressWarnings("resource")
@Override
public PutObjectResult putObject(PutObjectRequest putObjectRequest) throws AmazonClientException, AmazonServiceException {
    putObjectRequests.add(putObjectRequest);
    
    S3Object s3Object = new S3Object();
    s3Object.setBucketName(putObjectRequest.getBucketName());
    s3Object.setKey(putObjectRequest.getKey());
    if (putObjectRequest.getFile() != null) {
        try {
            s3Object.setObjectContent(new FileInputStream(putObjectRequest.getFile()));
        } catch (FileNotFoundException e) {
            throw new AmazonServiceException("Cannot store the file object.", e);
        }
    } else {
        s3Object.setObjectContent(putObjectRequest.getInputStream());
    }
    objects.add(s3Object);
    
    PutObjectResult putObjectResult = new PutObjectResult();
    putObjectResult.setETag("3a5c8b1ad448bca04584ecb55b836264");
    return putObjectResult;
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
/**
 * Puts an Object; Copies that object to a new bucket; Downloads the object from the new
 * bucket; compares checksums
 * of original and copied object
 *
 * @throws Exception if an Exception occurs
 */
@Test
public void shouldCopyObject() throws Exception {
  final File uploadFile = new File(UPLOAD_FILE_NAME);
  final String sourceKey = UPLOAD_FILE_NAME;
  final String destinationBucketName = "destinationBucket";
  final String destinationKey = "copyOf/" + sourceKey;

  final PutObjectResult putObjectResult =
      s3Client.putObject(new PutObjectRequest(BUCKET_NAME, sourceKey, uploadFile));

  final CopyObjectRequest copyObjectRequest =
      new CopyObjectRequest(BUCKET_NAME, sourceKey, destinationBucketName, destinationKey);
  s3Client.copyObject(copyObjectRequest);

  final com.amazonaws.services.s3.model.S3Object copiedObject =
      s3Client.getObject(destinationBucketName, destinationKey);

  final String copiedHash = HashUtil.getDigest(copiedObject.getObjectContent());
  copiedObject.close();

  assertThat("Sourcefile and copied File should have same Hashes",
      copiedHash,
      is(equalTo(putObjectResult.getETag())));
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
@Override
public boolean load(BuildCacheKey key, BuildCacheEntryReader reader) {
  if (s3.doesObjectExist(bucketName, key.getHashCode())) {
    logger.info("Found cache item '{}' in S3 bucket", key.getHashCode());
    S3Object object = s3.getObject(bucketName, key.getHashCode());
    try (InputStream is = object.getObjectContent()) {
      reader.readFrom(is);
      return true;
    } catch (IOException e) {
      throw new BuildCacheException("Error while reading cache object from S3 bucket", e);
    }
  } else {
    logger.info("Did not find cache item '{}' in S3 bucket", key.getHashCode());
    return false;
  }
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
@Test
public void copyOneObject() throws Exception {
  client.putObject("source", "data", inputData);

  Path sourceBaseLocation = new Path("s3://source/");
  Path replicaLocation = new Path("s3://target/");
  List<Path> sourceSubLocations = new ArrayList<>();
  S3S3Copier s3s3Copier = newS3S3Copier(sourceBaseLocation, sourceSubLocations, replicaLocation);
  Metrics metrics = s3s3Copier.copy();
  assertThat(metrics.getBytesReplicated(), is(7L));
  assertThat(metrics.getMetrics().get(S3S3CopierMetrics.Metrics.TOTAL_BYTES_TO_REPLICATE.name()), is(7L));
  S3Object object = client.getObject("target", "data");
  String data = IOUtils.toString(object.getObjectContent());
  assertThat(data, is("bar foo"));
  assertThat(registry.getGauges().containsKey(RunningMetrics.S3S3_CP_BYTES_REPLICATED.name()), is(true));
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
@Test
public void copyMultipleObjects() throws Exception {
  // Making sure we only request 1 file at the time so we need to loop
  ListObjectsRequestFactory mockListObjectRequestFactory = Mockito.mock(ListObjectsRequestFactory.class);
  when(mockListObjectRequestFactory.newInstance()).thenReturn(new ListObjectsRequest().withMaxKeys(1));

  client.putObject("source", "bar/data1", inputData);
  client.putObject("source", "bar/data2", inputData);

  Path sourceBaseLocation = new Path("s3://source/bar/");
  Path replicaLocation = new Path("s3://target/foo/");
  List<Path> sourceSubLocations = new ArrayList<>();
  S3S3Copier s3s3Copier = new S3S3Copier(sourceBaseLocation, sourceSubLocations, replicaLocation, s3ClientFactory,
      transferManagerFactory, mockListObjectRequestFactory, registry, s3S3CopierOptions);
  Metrics metrics = s3s3Copier.copy();
  assertThat(metrics.getBytesReplicated(), is(14L));

  S3Object object1 = client.getObject("target", "foo/data1");
  String data1 = IOUtils.toString(object1.getObjectContent());
  assertThat(data1, is("bar foo"));
  S3Object object2 = client.getObject("target", "foo/data2");
  String data2 = IOUtils.toString(object2.getObjectContent());
  assertThat(data2, is("bar foo"));
}
 

import com.amazonaws.services.s3.model.S3Object; //導入依賴的package包/類
/**
 * Attempt to fetch a secret from S3.
 *
 * @param s3path where to fetch it from
 * @return the content of the file found on S3
 * @throws IOException on problems streaming the content of the file
 * @throws AmazonS3Exception on problems communicating with amazon
 */
private String getS3Value(final SecretPath s3path) throws IOException, AmazonS3Exception {
    LOG.info("Fetching secret from s3://" + s3path.bucket + "/" + s3path.key);
    if (s3Client == null) {
        if (awsCredentialsProvider != null) {
            s3Client = AmazonS3ClientBuilder.standard().withCredentials(awsCredentialsProvider)
                    .build();
        } else {
            s3Client = AmazonS3ClientBuilder.standard().build();
        }
    }
    final S3Object s3object
            = s3Client.getObject(new GetObjectRequest(s3path.bucket, s3path.key));
    final BufferedReader reader
            = new BufferedReader(new InputStreamReader(s3object.getObjectContent()));
    final StringBuilder b = new StringBuilder();
    String line;
    while((line = reader.readLine()) != null) {
        b.append(line);
    }
    LOG.info("Found secret");
    reader.close();
    return b.toString();
}