org.apache.hadoop.tools.distcp2

类 FileBasedCopyListing

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.tools.distcp2.CopyListing

org.apache.hadoop.tools.distcp2.FileBasedCopyListing

所有已实现的接口:

Configurable

public class FileBasedCopyListing
extends CopyListing

FileBasedCopyListing implements the CopyListing interface, to create the copy-listing for DistCp, by iterating over all source paths mentioned in a specified input-file.

构造器概要

构造器

构造器和说明
FileBasedCopyListing(Configuration configuration, Credentials credentials) Constructor, to initialize base-class.

方法概要

方法

限定符和类型	方法和说明
void	doBuildListing(Path pathToListFile, DistCpOptions options) Implementation of CopyListing::buildListing().
protected long	getBytesToCopy() Return the total bytes that distCp should copy for the source paths This doesn't consider whether file is same should be skipped during copy
protected long	getNumberOfPaths() Return the total number of paths to distcp, includes directories as well This doesn't consider whether file/dir is already present and should be skipped during copy
protected void	validatePaths(DistCpOptions options) Validate input and output paths

从类继承的方法 org.apache.hadoop.tools.distcp2.CopyListing

buildListing, getCopyListing, getCredentials, setCredentials

从类继承的方法 org.apache.hadoop.conf.Configured

getConf, setConf

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

FileBasedCopyListing

public FileBasedCopyListing(Configuration configuration,
                    Credentials credentials)

Constructor, to initialize base-class.

参数:

configuration - The input Configuration object.

credentials - - Credentials object on which the FS delegation tokens are cached. If null delegation token caching is skipped

方法详细资料

validatePaths

protected void validatePaths(DistCpOptions options)
                      throws IOException,
                             org.apache.hadoop.tools.distcp2.CopyListing.InvalidInputException

Validate input and output paths

指定者:

validatePaths 在类中 CopyListing

参数:

options - - Input options

抛出:

IOException

org.apache.hadoop.tools.distcp2.CopyListing.InvalidInputException

doBuildListing

public void doBuildListing(Path pathToListFile,
                  DistCpOptions options)
                    throws IOException

Implementation of CopyListing::buildListing(). Iterates over all source paths mentioned in the input-file.

指定者:

doBuildListing 在类中 CopyListing

参数:

pathToListFile - Path on HDFS where the listing file is written.

options - Input Options for DistCp (indicating source/target paths.)

抛出:

IOException

getBytesToCopy

protected long getBytesToCopy()

Return the total bytes that distCp should copy for the source paths This doesn't consider whether file is same should be skipped during copy

指定者:

getBytesToCopy 在类中 CopyListing

返回:

total bytes to copy

getNumberOfPaths

protected long getNumberOfPaths()

Return the total number of paths to distcp, includes directories as well This doesn't consider whether file/dir is already present and should be skipped during copy

指定者:

getNumberOfPaths 在类中 CopyListing

返回:

Total number of paths to distcp