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use a cached singleton for ConfigFactory.load()

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Havoc Pennington 2011-11-28 12:46:11 -05:00
parent 9aae9e2a80
commit cfb4887d50
1 changed files with 9 additions and 3 deletions
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12
config/src/main/java/com/typesafe/config/ConfigFactory.java
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@ -120,15 +120,21 @@ public final class ConfigFactory {
.resolve(resolveOptions);
}
private static class DefaultConfigHolder {
static final Config defaultConfig = load("application");
}
/**
* Loads a default configuration, equivalent to {@link #load(String)
* load("application")}. This configuration should be used by libraries and
* frameworks unless an application provides a different one.
* <p>
* This method may return a cached singleton.
*
* @return configuration for an application
*/
public static Config load() {
return load("application");
return DefaultConfigHolder.defaultConfig;
}
/**
@ -207,11 +213,11 @@ public final class ConfigFactory {
* {@link java.lang.System#getProperties()}, parsed and converted as with
* {@link #parseProperties}. This method can return a global immutable
* singleton, so it's preferred over parsing system properties yourself.
*
*
* <p>
* {@link #load} will include the system properties as overrides already, as
* will {@link #defaultReference} and {@link #defaultOverrides}.
*
*
* <p>
* Because this returns a singleton, it will not notice changes to system
* properties made after the first time this method is called.