org.apache.hadoop.ant

Class DfsTask

java.lang.Object

org.apache.tools.ant.ProjectComponent

org.apache.tools.ant.Task

org.apache.hadoop.ant.DfsTask

All Implemented Interfaces:

Cloneable

Direct Known Subclasses:

DfsBaseConditional

@InterfaceAudience.Private
public class DfsTask
extends org.apache.tools.ant.Task

FsShell wrapper for ant Task.

Field Summary

Fields

Modifier and Type	Field and Description
protected LinkedList<String>	argv
protected String	cmd
protected org.apache.tools.ant.AntClassLoader	confloader
protected OutputStream	err
protected String	errprop
protected boolean	failonerror
protected OutputStream	out
protected String	outprop

Fields inherited from class org.apache.tools.ant.Task

target, taskName, taskType, wrapper

Fields inherited from class org.apache.tools.ant.ProjectComponent

description, location, project

Constructor Summary

Constructors

Constructor and Description
DfsTask()

Method Summary

Methods

Modifier and Type	Method and Description
void	execute() Invoke FsShell.main(java.lang.String[]) after a few cursory checks of the configuration.
protected void	popContext() Create the appropriate output properties with their respective output, restore System.out, System.err and release any resources from created ClassLoaders to aid garbage collection.
protected int	postCmd(int exit_code)
protected void	pushContext() Save the current values of System.out, System.err and configure output streams for FsShell.
void	setArgs(String args) Sets the argument list from a String of comma-separated values.
void	setCmd(String cmd) Sets the command to run in FsShell.
void	setConf(String confpath) Sets the path for the parent-last ClassLoader, intended to be used for Configuration.
void	setErr(String errprop) Sets the property into which System.err will be written.
void	setFailonerror(boolean failonerror) Sets a property controlling whether or not a BuildException will be thrown if the command returns a value less than zero or throws an exception.
void	setOut(String outprop) Sets the property into which System.out will be written.

Methods inherited from class org.apache.tools.ant.Task

bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, init, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType

Methods inherited from class org.apache.tools.ant.ProjectComponent

clone, getDescription, getLocation, getProject, setDescription, setLocation, setProject

Methods inherited from class java.lang.Object

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

Field Detail

confloader

protected org.apache.tools.ant.AntClassLoader confloader

out

protected OutputStream out

err

protected OutputStream err

cmd

protected String cmd

argv

protected final LinkedList<String> argv

outprop

protected String outprop

errprop

protected String errprop

failonerror

protected boolean failonerror

Constructor Detail

DfsTask

public DfsTask()

Method Detail

setCmd

public void setCmd(String cmd)

Sets the command to run in FsShell.

Parameters:

cmd - A valid command to FsShell, sans "-".

setArgs

public void setArgs(String args)

Sets the argument list from a String of comma-separated values.

Parameters:

args - A String of comma-separated arguments to FsShell.

setOut

public void setOut(String outprop)

Sets the property into which System.out will be written.

Parameters:

outprop - The name of the property into which System.out is written. If the property is defined before this task is executed, it will not be updated.

setErr

public void setErr(String errprop)

Sets the property into which System.err will be written. If this property has the same name as the property for System.out, the two will be interlaced.

Parameters:

errprop - The name of the property into which System.err is written. If the property is defined before this task is executed, it will not be updated.

setConf

public void setConf(String confpath)

Sets the path for the parent-last ClassLoader, intended to be used for Configuration.

Parameters:

confpath - The path to search for resources, classes, etc. before parent ClassLoaders.

setFailonerror

public void setFailonerror(boolean failonerror)

Sets a property controlling whether or not a BuildException will be thrown if the command returns a value less than zero or throws an exception.

Parameters:

failonerror - If true, throw a BuildException on error.

pushContext

protected void pushContext()

Save the current values of System.out, System.err and configure output streams for FsShell.

popContext

protected void popContext()

Create the appropriate output properties with their respective output, restore System.out, System.err and release any resources from created ClassLoaders to aid garbage collection.

postCmd

protected int postCmd(int exit_code)

execute

public void execute()
             throws org.apache.tools.ant.BuildException

Invoke FsShell.main(java.lang.String[]) after a few cursory checks of the configuration.

Overrides:

execute in class org.apache.tools.ant.Task

Throws:

org.apache.tools.ant.BuildException