org.apache.logging.log4j.util

Class SystemPropertiesPropertySource

java.lang.Object

org.apache.logging.log4j.util.SystemPropertiesPropertySource

All Implemented Interfaces:

PropertySource

public class SystemPropertiesPropertySource
extends Object
implements PropertySource

PropertySource backed by the current system properties. Other than having a higher priority over normal properties, this follows the same rules as PropertiesPropertySource.

Since:

2.10.0

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.logging.log4j.util.PropertySource

PropertySource.Comparator, PropertySource.Util

Constructor Summary

Constructors

Constructor and Description
SystemPropertiesPropertySource()

Method Summary

Modifier and Type	Method and Description
boolean	containsProperty(String key) For PropertySources that cannot iterate over all the potential properties this provides a direct lookup.
void	forEach(BiConsumer<String,String> action) Iterates over all properties and performs an action for each key/value pair.
CharSequence	getNormalForm(Iterable<? extends CharSequence> tokens) Converts a list of property name tokens into a normal form.
int	getPriority() Returns the order in which this PropertySource has priority.
String	getProperty(String key) For PropertySources that cannot iterate over all the potential properties this provides a direct lookup.
Collection<String>	getPropertyNames() Returns the list of all property names.
static String	getSystemProperty(String key, String defaultValue) Used by bootstrap code to get system properties without loading PropertiesUtil.

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemPropertiesPropertySource

public SystemPropertiesPropertySource()

Method Detail

getSystemProperty

public static String getSystemProperty(String key,
                                       String defaultValue)

Used by bootstrap code to get system properties without loading PropertiesUtil.

getPriority

public int getPriority()

Description copied from interface: PropertySource

Returns the order in which this PropertySource has priority. A higher value means that the source will be searched later and can be overridden by other property sources.

Specified by:

getPriority in interface PropertySource

Returns:

priority value

forEach

public void forEach(BiConsumer<String,String> action)

Description copied from interface: PropertySource

Iterates over all properties and performs an action for each key/value pair.

Specified by:

forEach in interface PropertySource

Parameters:

action - action to perform on each key/value pair

getNormalForm

public CharSequence getNormalForm(Iterable<? extends CharSequence> tokens)

Description copied from interface: PropertySource

Converts a list of property name tokens into a normal form. For example, a list of tokens such as "foo", "bar", "baz", might be normalized into the property name "log4j2.fooBarBaz".

Specified by:

getNormalForm in interface PropertySource

Parameters:

tokens - list of property name tokens

Returns:

a normalized property name using the given tokens

getPropertyNames

public Collection<String> getPropertyNames()

Description copied from interface: PropertySource

Returns the list of all property names.

Specified by:

getPropertyNames in interface PropertySource

Returns:

list of property names

getProperty

public String getProperty(String key)

Description copied from interface: PropertySource

For PropertySources that cannot iterate over all the potential properties this provides a direct lookup.

Specified by:

getProperty in interface PropertySource

Parameters:

key - The key to search for.

Returns:

The value or null;

containsProperty

public boolean containsProperty(String key)

Description copied from interface: PropertySource

For PropertySources that cannot iterate over all the potential properties this provides a direct lookup.

Specified by:

containsProperty in interface PropertySource

Parameters:

key - The key to search for.

Returns:

The value or null;