public static void populateSystemPropertiesFromDefaults(final String initialProperties)
throws IOException {
URL initialPropertiesLocation;
if (initialProperties == null) {
initialPropertiesLocation = Broker.class.getClassLoader().getResource("system.properties");
} else {
initialPropertiesLocation = (new File(initialProperties)).toURI().toURL();
}
Properties props = new Properties(CommonProperties.asProperties());
if (initialPropertiesLocation != null) {
try (InputStream inStream = initialPropertiesLocation.openStream()) {
props.load(inStream);
}
}
Set<String> propertyNames = new HashSet<>(props.stringPropertyNames());
propertyNames.removeAll(System.getProperties().stringPropertyNames());
for (String propName : propertyNames) {
System.setProperty(propName, props.getProperty(propName));
}
}
