org.apache.hadoop.tools.distcp2.mapred

类 RetriableFileCopyCommand

java.lang.Object

org.apache.hadoop.tools.distcp2.util.RetriableCommand

org.apache.hadoop.tools.distcp2.mapred.RetriableFileCopyCommand

public class RetriableFileCopyCommand
extends RetriableCommand

This class extends RetriableCommand to implement the copy of files, with retries on failure.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	RetriableFileCopyCommand.CopyReadException Special subclass of IOException.

字段概要

从类继承的字段 org.apache.hadoop.tools.distcp2.util.RetriableCommand

description

构造器概要

构造器

构造器和说明
RetriableFileCopyCommand(boolean skipCrc, String description) Create a RetriableFileCopyCommand.
RetriableFileCopyCommand(String description) Constructor, taking a description of the action.

方法概要

方法

限定符和类型	方法和说明
protected Object	doExecute(Object... arguments) Implementation of RetriableCommand::doExecute().

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

execute, setRetryPolicy

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

RetriableFileCopyCommand

public RetriableFileCopyCommand(String description)

Constructor, taking a description of the action.

参数:

description - Verbose description of the copy operation.

RetriableFileCopyCommand

public RetriableFileCopyCommand(boolean skipCrc,
                        String description)

Create a RetriableFileCopyCommand.

参数:

skipCrc - Whether to skip the crc check.

description - A verbose description of the copy operation.

方法详细资料

doExecute

protected Object doExecute(Object... arguments)
                    throws Exception

Implementation of RetriableCommand::doExecute(). This is the actual copy-implementation.

指定者:

doExecute 在类中 RetriableCommand

参数:

arguments - Argument-list to the command.

返回:

Number of bytes copied.

抛出:

Exception: - CopyReadException, if there are read-failures. All other failures are IOExceptions.

Exception - Throws Exception on complete failure.