de.kumpe.hadooptimizer.examples
Class Example

java.lang.Object
  org.apache.hadoop.conf.Configured
      de.kumpe.hadooptimizer.examples.Example

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable

Direct Known Subclasses:

Convert, OptimizerExample, SvgRenderer

public abstract class Example
extends org.apache.hadoop.conf.Configured

Base class for all "executables" in the examples module. It delivers a basic infrastructure for a common workflow:

1. createOptions()
2. processCommandLine()
3. execute()

Author:

Christian Kumpe

Field Summary

static String	BANNER_TEXT
protected String	baseDir
static String	COMMAND_LINE Command line key in Configuration
protected org.apache.commons.cli.CommandLine	commandLine
protected static org.apache.commons.logging.Log	log
protected PrintWriter	logFile
protected static String	OPTION_GUI
protected static String	OPTION_HELP
protected static String	OPTION_LOG_LEVEL
protected Collection<Runnable>	shutdownHooks

Constructor Summary

Example()

Method Summary

protected org.apache.commons.cli.Options	createOptions()
protected abstract void	execute()
protected abstract String	getVersionInfo()
InputStream	intputStream(String filename)
OutputStream	outputStream(String filename)
protected void	processCommandLine()
void	run(String[] args)

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Field Detail

BANNER_TEXT

public static final String BANNER_TEXT

See Also:

Constant Field Values

OPTION_HELP

protected static final String OPTION_HELP

See Also:

Constant Field Values

OPTION_GUI

protected static final String OPTION_GUI

See Also:

Constant Field Values

OPTION_LOG_LEVEL

protected static final String OPTION_LOG_LEVEL

See Also:

Constant Field Values

COMMAND_LINE

public static final String COMMAND_LINE

Command line key in Configuration

See Also:

Constant Field Values

log

protected static final org.apache.commons.logging.Log log

shutdownHooks

protected final Collection<Runnable> shutdownHooks

commandLine

protected org.apache.commons.cli.CommandLine commandLine

baseDir

protected final String baseDir

logFile

protected PrintWriter logFile

Constructor Detail

Example

public Example()

Method Detail

createOptions

protected org.apache.commons.cli.Options createOptions()
                                                throws Exception

Throws:

Exception

run

public void run(String[] args)
         throws Exception

Throws:

Exception

getVersionInfo

protected abstract String getVersionInfo()

execute

protected abstract void execute()
                         throws Exception

Throws:

Exception

processCommandLine

protected void processCommandLine()
                           throws Exception

Throws:

Exception

outputStream

public OutputStream outputStream(String filename)
                          throws IOException

Throws:

IOException

intputStream

public InputStream intputStream(String filename)
                         throws IOException

Throws:

IOException