org.apache.hadoop.hbase.util

Class AbstractHBaseTool

java.lang.Object

org.apache.hadoop.hbase.util.AbstractHBaseTool

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

Direct Known Subclasses:

CoprocessorValidator, CreateSnapshot, DataBlockEncodingValidator, ExportSnapshot, HFileContentValidator, RegionMover, SnapshotInfo

@InterfaceAudience.Private
public abstract class AbstractHBaseTool
extends Object
implements org.apache.hadoop.util.Tool

Common base class used for HBase command-line tools. Simplifies workflow and command-line argument parsing.

Field Summary

Fields

Modifier and Type	Field and Description
protected String[]	cmdLineArgs
protected org.apache.hadoop.conf.Configuration	conf
static int	EXIT_FAILURE
static int	EXIT_SUCCESS
static String	LONG_HELP_OPTION
protected org.apache.hbase.thirdparty.org.apache.commons.cli.Options	options
static String	SHORT_HELP_OPTION

Constructor Summary

Constructors

Constructor and Description
AbstractHBaseTool()

Method Summary

Modifier and Type	Method and Description
protected void	addOption(org.apache.hbase.thirdparty.org.apache.commons.cli.Option option)
protected abstract void	addOptions() Override this to add command-line options using addOptWithArg(java.lang.String, java.lang.String) and similar methods.
protected void	addOptNoArg(String opt, String description)
protected void	addOptNoArg(String shortOpt, String longOpt, String description)
protected void	addOptWithArg(String opt, String description)
protected void	addOptWithArg(String shortOpt, String longOpt, String description)
protected void	addRequiredOption(org.apache.hbase.thirdparty.org.apache.commons.cli.Option option)
protected void	addRequiredOptWithArg(String opt, String description)
protected void	addRequiredOptWithArg(String shortOpt, String longOpt, String description)
protected void	doStaticMain(String[] args) Call this from the concrete tool class's main function.
protected abstract int	doWork() The "main function" of the tool
org.apache.hadoop.conf.Configuration	getConf()
double	getOptionAsDouble(org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine cmd, String opt, double defaultValue)
int	getOptionAsInt(org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine cmd, String opt, int defaultValue)
long	getOptionAsLong(org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine cmd, String opt, int defaultValue)
protected org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLineParser	newParser() Create the parser to use for parsing and validating the command line.
protected org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine	parseArgs(String[] args)
static int	parseInt(String s, int minValue, int maxValue)
static long	parseLong(String s, long minValue, long maxValue) Parse a number and enforce a range.
protected void	printUsage()
protected void	printUsage(String usageStr, String usageHeader, String usageFooter)
protected void	processOldArgs(List<String> args) For backward compatibility.
protected abstract void	processOptions(org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine cmd) This method is called to process the options after they have been parsed.
int	run(String[] args)
void	setConf(org.apache.hadoop.conf.Configuration conf)

Methods inherited from class java.lang.Object

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

Field Detail

EXIT_SUCCESS

public static final int EXIT_SUCCESS

See Also:

Constant Field Values

EXIT_FAILURE

public static final int EXIT_FAILURE

See Also:

Constant Field Values

SHORT_HELP_OPTION

public static final String SHORT_HELP_OPTION

See Also:

Constant Field Values

LONG_HELP_OPTION

public static final String LONG_HELP_OPTION

See Also:

Constant Field Values

options

protected final org.apache.hbase.thirdparty.org.apache.commons.cli.Options options

conf

protected org.apache.hadoop.conf.Configuration conf

cmdLineArgs

protected String[] cmdLineArgs

Constructor Detail

AbstractHBaseTool

public AbstractHBaseTool()

Method Detail

addOptions

protected abstract void addOptions()

Override this to add command-line options using addOptWithArg(java.lang.String, java.lang.String) and similar methods.

processOptions

protected abstract void processOptions(org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine cmd)

This method is called to process the options after they have been parsed.

doWork

protected abstract int doWork()
                       throws Exception

The "main function" of the tool

Throws:

Exception

processOldArgs

protected void processOldArgs(List<String> args)

For backward compatibility. DO NOT use it for new tools. We have options in existing tools which can't be ported to Apache CLI's Option. (because they don't pass validation, for e.g. "-copy-to". "-" means short name which doesn't allow '-' in name). This function is to allow tools to have, for time being, parameters which can't be parsed using Option. Overrides should consume all valid legacy arguments. If the param 'args' is not empty on return, it means there were invalid options, in which case we'll exit from the tool. Note that it's called before processOptions(CommandLine), which means new options' values will override old ones'.

getConf

public org.apache.hadoop.conf.Configuration getConf()

Specified by:

getConf in interface org.apache.hadoop.conf.Configurable

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

run

public int run(String[] args)
        throws IOException

Specified by:

run in interface org.apache.hadoop.util.Tool

Throws:

IOException

newParser

protected org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLineParser newParser()

Create the parser to use for parsing and validating the command line. Since commons-cli lacks the capability to validate arbitrary combination of options, it may be helpful to bake custom logic into a specialized parser implementation. See LoadTestTool for examples.

Returns:

a new parser specific to the current tool

parseArgs

protected org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine parseArgs(String[] args)
                                                                            throws org.apache.hbase.thirdparty.org.apache.commons.cli.ParseException

Throws:

org.apache.hbase.thirdparty.org.apache.commons.cli.ParseException

printUsage

protected void printUsage()

printUsage

protected void printUsage(String usageStr,
                          String usageHeader,
                          String usageFooter)

addOption

protected void addOption(org.apache.hbase.thirdparty.org.apache.commons.cli.Option option)

addRequiredOption

protected void addRequiredOption(org.apache.hbase.thirdparty.org.apache.commons.cli.Option option)

addRequiredOptWithArg

protected void addRequiredOptWithArg(String opt,
                                     String description)

addRequiredOptWithArg

protected void addRequiredOptWithArg(String shortOpt,
                                     String longOpt,
                                     String description)

addOptNoArg

protected void addOptNoArg(String opt,
                           String description)

addOptNoArg

protected void addOptNoArg(String shortOpt,
                           String longOpt,
                           String description)

addOptWithArg

protected void addOptWithArg(String opt,
                             String description)

addOptWithArg

protected void addOptWithArg(String shortOpt,
                             String longOpt,
                             String description)

getOptionAsInt

public int getOptionAsInt(org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine cmd,
                          String opt,
                          int defaultValue)

getOptionAsLong

public long getOptionAsLong(org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine cmd,
                            String opt,
                            int defaultValue)

getOptionAsDouble

public double getOptionAsDouble(org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine cmd,
                                String opt,
                                double defaultValue)

parseLong

public static long parseLong(String s,
                             long minValue,
                             long maxValue)

Parse a number and enforce a range.

parseInt

public static int parseInt(String s,
                           int minValue,
                           int maxValue)

doStaticMain

protected void doStaticMain(String[] args)

Call this from the concrete tool class's main function.