Java S3ObjectInputStream.close方法代碼示例

import com.amazonaws.services.s3.model.S3ObjectInputStream; //導入方法依賴的package包/類
/**
 * S3 block read would be achieved through the AmazonS3 client. Following
 * are the steps to achieve: (1) Create the objectRequest from bucketName
 * and filePath. (2) Set the range to the above created objectRequest. (3)
 * Get the object portion through AmazonS3 client API. (4) Get the object
 * content from the above object portion.
 *
 * @param bytesFromCurrentOffset
 *          bytes read till now from current offset
 * @param bytesToFetch
 *          the number of bytes to be fetched
 * @return the number of bytes read, -1 if 0 bytes read
 * @throws IOException
 */

@Override
protected int readData(final long bytesFromCurrentOffset, final int bytesToFetch) throws IOException
{
  GetObjectRequest rangeObjectRequest = new GetObjectRequest(s3Params.bucketName, s3Params.filePath);
  rangeObjectRequest.setRange(offset + bytesFromCurrentOffset, offset + bytesFromCurrentOffset + bytesToFetch - 1);
  S3Object objectPortion = s3Params.s3Client.getObject(rangeObjectRequest);
  S3ObjectInputStream wrappedStream = objectPortion.getObjectContent();
  buffer = ByteStreams.toByteArray(wrappedStream);
  wrappedStream.close();
  int bufferLength = buffer.length;
  if (bufferLength <= 0) {
    return -1;
  }
  return bufferLength;
}
 

import com.amazonaws.services.s3.model.S3ObjectInputStream; //導入方法依賴的package包/類
/**
 * S3 block read would be achieved through the AmazonS3 client. Following are the steps to achieve:
 * (1) Create the objectRequest from bucketName and filePath.
 * (2) Set the range to the above created objectRequest.
 * (3) Get the object portion through AmazonS3 client API.
 * (4) Get the object content from the above object portion.
 * @return the block entity
 * @throws IOException
 */
@Override
protected Entity readEntity() throws IOException
{
  entity.clear();
  GetObjectRequest rangeObjectRequest = new GetObjectRequest(
      bucketName, filePath);
  rangeObjectRequest.setRange(offset, blockMetadata.getLength() - 1);
  S3Object objectPortion = s3Client.getObject(rangeObjectRequest);
  S3ObjectInputStream wrappedStream = objectPortion.getObjectContent();
  byte[] record = ByteStreams.toByteArray(wrappedStream);
  entity.setUsedBytes(record.length);
  entity.setRecord(record);
  wrappedStream.close();
  return entity;
}
 

import com.amazonaws.services.s3.model.S3ObjectInputStream; //導入方法依賴的package包/類
@Override
public int read(final byte[] b, final int off, final int len)
	throws IOException
{
	final S3Object object =
		s3.getObject(new GetObjectRequest(bucketName, key).withRange(pos, pos +
			len));

	final S3ObjectInputStream stream = object.getObjectContent();
	final int r = stream.read(b, off, len);
	stream.close();
	pos += r;
	return r;
}
 

import com.amazonaws.services.s3.model.S3ObjectInputStream; //導入方法依賴的package包/類
/**
 * Download a file
 */
@Override
public boolean download(String localFile) {
	try {
		if (!isFile()) return false;

		S3Object s3object = getS3().getObject(new GetObjectRequest(bucketName, key));
		if (verbose) System.out.println("Downloading '" + this + "'");
		updateInfo(s3object);

		// Create local file
		mkdirsLocal(localFile);
		FileOutputStream os = new FileOutputStream(getLocalPath());

		// Copy S3 object to file
		S3ObjectInputStream is = s3object.getObjectContent();
		int count = 0, total = 0, lastShown = 0;
		byte data[] = new byte[BUFFER_SIZE];
		while ((count = is.read(data, 0, BUFFER_SIZE)) != -1) {
			os.write(data, 0, count);
			total += count;

			if (verbose) {
				// Show every MB
				if ((total - lastShown) > (1024 * 1024)) {
					System.err.print(".");
					lastShown = total;
				}
			}
		}
		if (verbose) System.err.println("");

		// Close streams
		is.close();
		os.close();
		if (verbose) Timer.showStdErr("Donwload finished. Total " + total + " bytes.");

		// Update last modified info
		updateLocalFileLastModified();

		return true;
	} catch (Exception e) {
		Timer.showStdErr("ERROR while downloading " + this);
		throw new RuntimeException(e);
	}
}