Package org.apache.accumulo.core.conf

Class ConfigurationTypeHelper

java.lang.Object

org.apache.accumulo.core.conf.ConfigurationTypeHelper

public class ConfigurationTypeHelper
extends Object

Constructor Summary

Constructors

Constructor	Description
ConfigurationTypeHelper()

Method Summary

Modifier and Type	Method	Description
static <T> T	getClassInstance(String context, String clazzName, Class<T> base)	Loads a class in the given classloader context.
static <T> T	getClassInstance(String context, String clazzName, Class<T> base, T defaultInstance)	Loads a class in the given classloader context, suppressing any exceptions, and optionally providing a default instance to use.
static long	getFixedMemoryAsBytes(String str)	Interprets a string specifying bytes.
static double	getFraction(String str)	Interprets a string specifying a fraction.
static long	getMemoryAsBytes(String str)	Interprets a string specifying a Memory type which is specified as a long integer followed by an optional B (bytes), K (KB), M (MB), G (GB) or % (percentage).
static int	getNumThreads(String threads)	Get the number of threads from string property.
static long	getTimeInMillis(String str)	Interprets a string specifying a time duration.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConfigurationTypeHelper

public ConfigurationTypeHelper()

Method Detail

getFixedMemoryAsBytes

public static long getFixedMemoryAsBytes(String str)

Interprets a string specifying bytes. A bytes type is specified as a long integer followed by an optional B (bytes), K (KB), M (MB), or G (GB).

Parameters:

str - String value

Returns:

interpreted memory size in bytes

getMemoryAsBytes

public static long getMemoryAsBytes(String str)

Interprets a string specifying a Memory type which is specified as a long integer followed by an optional B (bytes), K (KB), M (MB), G (GB) or % (percentage).

Parameters:

str - String value

Returns:

interpreted memory size in bytes

getTimeInMillis

public static long getTimeInMillis(String str)

Interprets a string specifying a time duration. A time duration is specified as a long integer followed by an optional d (days), h (hours), m (minutes), s (seconds), or ms (milliseconds). A value without a unit is interpreted as seconds.

Parameters:

str - string value

Returns:

interpreted time duration in milliseconds

getFraction

public static double getFraction(String str)

Interprets a string specifying a fraction. A fraction is specified as a double. An optional % at the end signifies a percentage.

Parameters:

str - string value

Returns:

interpreted fraction as a decimal value

getClassInstance

public static <T> T getClassInstance(String context,
                                     String clazzName,
                                     Class<T> base,
                                     T defaultInstance)

Loads a class in the given classloader context, suppressing any exceptions, and optionally providing a default instance to use.

Parameters:

context - the per-table context, can be null

clazzName - the name of the class to load

base - the type of the class

defaultInstance - a default instance if the class cannot be loaded

Returns:

a new instance of the class, or the defaultInstance

getClassInstance

public static <T> T getClassInstance(String context,
                                     String clazzName,
                                     Class<T> base)
                              throws ClassNotFoundException,
                                     IOException,
                                     InstantiationException,
                                     IllegalAccessException

Loads a class in the given classloader context.

Parameters:

context - the per-table context, can be null

clazzName - the name of the class to load

base - the type of the class

Returns:

a new instance of the class

Throws:

ClassNotFoundException

IOException

InstantiationException

IllegalAccessException

getNumThreads

public static int getNumThreads(String threads)

Get the number of threads from string property. If the value ends with C, then it will be multiplied by the number of cores.