com.buabook.common

Class Systems

java.lang.Object

com.buabook.common.Systems

public final class Systems
extends Object

Host System Interface Methods

(c) 2015 - 2017 Sport Trades Ltd

Since:

17 Jun 2015

Version:

1.1.0

Author:

Jas Rajasansir

Constructor Summary

Constructors

Constructor and Description
Systems()

Method Summary

Modifier and Type	Method and Description
static File	getApplicationRoot(Class<?> bootClass) Determines the root folder that the application is running from based on the location of class containing the application main method.
static String	getConfig(String envPropName) Provides a way of retrieving system configuration from either an environment variable first or, if not set, then a Java system property.

Methods inherited from class java.lang.Object

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

Constructor Detail

Systems

public Systems()

Method Detail

getApplicationRoot

public static File getApplicationRoot(Class<?> bootClass)
                               throws IllegalArgumentException

Determines the root folder that the application is running from based on the location of class containing the application main method.

Parameters:

bootClass - The class containing the main method

Returns:

The root folder the application resides in. If the application is in a JAR, it will return the folder that contains the JAR.

Throws:

IllegalArgumentException

getConfig

public static String getConfig(String envPropName)
                        throws IllegalArgumentException

Provides a way of retrieving system configuration from either an environment variable first or, if not set, then a Java system property.

Parameters:

envPropName - The system configuration value to load

Returns:

The system property value

Throws:

IllegalArgumentException - If the property is not set

See Also:

System.getenv(String), System.getProperty(String)