com.qcloud.cos.transfer

类 TransferManagerUtils

java.lang.Object

com.qcloud.cos.transfer.TransferManagerUtils

public class TransferManagerUtils
extends Object

Internal utilities for multipart uploads with TransferManager.

构造器概要

构造器

构造器和说明
TransferManagerUtils()

方法概要

方法

限定符和类型	方法和说明
static long	calculateOptimalPartSize(PutObjectRequest putObjectRequest, TransferManagerConfiguration configuration) Returns the optimal part size, in bytes, for each individual part upload in a multipart upload.
static long	calculateOptimalPartSizeForCopy(CopyObjectRequest copyObjectRequest, TransferManagerConfiguration configuration, long contentLengthOfSource) Calculates the optimal part size of each part request if the copy operation is carried out as multi-part copy.
static ThreadPoolExecutor	createDefaultExecutorService() Returns a new thread pool configured with the default settings.
static PauseStatus	determinePauseStatus(Transfer.TransferState transferState, boolean forceCancel) Determines the pause status based on the current state of transfer.
static long	getContentLength(PutObjectRequest putObjectRequest) Returns the size of the data in this request, otherwise -1 if the content length is unknown.
static File	getRequestFile(PutObjectRequest putObjectRequest) Convenience method for getting the file specified in a request.
static boolean	isUploadParallelizable(PutObjectRequest putObjectRequest, boolean isUsingEncryption) Returns true if the specified upload request can use parallel part uploads for increased performance.
static boolean	shouldUseMultipartUpload(PutObjectRequest putObjectRequest, TransferManagerConfiguration configuration) Returns true if the the specified request should be processed as a multipart upload (instead of a single part upload).

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

TransferManagerUtils

public TransferManagerUtils()

方法详细资料

createDefaultExecutorService

public static ThreadPoolExecutor createDefaultExecutorService()

Returns a new thread pool configured with the default settings.

返回:

A new thread pool configured with the default settings.

isUploadParallelizable

public static boolean isUploadParallelizable(PutObjectRequest putObjectRequest,
                             boolean isUsingEncryption)

Returns true if the specified upload request can use parallel part uploads for increased performance.

参数:

putObjectRequest - The request to check.

isUsingEncryption - True if the upload is an encrypted upload, otherwise false.

返回:

True if this request can use parallel part uploads for faster uploads.

getContentLength

public static long getContentLength(PutObjectRequest putObjectRequest)

Returns the size of the data in this request, otherwise -1 if the content length is unknown.

参数:

putObjectRequest - The request to check.

返回:

The size of the data in this request, otherwise -1 if the size of the data is unknown.

calculateOptimalPartSize

public static long calculateOptimalPartSize(PutObjectRequest putObjectRequest,
                            TransferManagerConfiguration configuration)

Returns the optimal part size, in bytes, for each individual part upload in a multipart upload.

参数:

putObjectRequest - The request containing all the details of the upload.

configuration - Configuration values to use when calculating size.

返回:

The optimal part size, in bytes, for each individual part upload in a multipart upload.

shouldUseMultipartUpload

public static boolean shouldUseMultipartUpload(PutObjectRequest putObjectRequest,
                               TransferManagerConfiguration configuration)

Returns true if the the specified request should be processed as a multipart upload (instead of a single part upload).

参数:

putObjectRequest - The request containing all the details of the upload.

configuration - Configuration settings controlling how transfer manager processes requests.

返回:

True if the the specified request should be processed as a multipart upload.

getRequestFile

public static File getRequestFile(PutObjectRequest putObjectRequest)

Convenience method for getting the file specified in a request.

calculateOptimalPartSizeForCopy

public static long calculateOptimalPartSizeForCopy(CopyObjectRequest copyObjectRequest,
                                   TransferManagerConfiguration configuration,
                                   long contentLengthOfSource)

Calculates the optimal part size of each part request if the copy operation is carried out as multi-part copy.

参数:

copyObjectRequest - the original request.

configuration - configuration containing the default part size.

contentLengthOfSource - content length of the Qcloud COS object.

返回:

the optimal part size for a copy part request.

determinePauseStatus

public static PauseStatus determinePauseStatus(Transfer.TransferState transferState,
                               boolean forceCancel)

Determines the pause status based on the current state of transfer.