in spectator-web-spring/src/main/java/com/netflix/spectator/controllers/filter/PrototypeMeasurementFilter.java [62:73]
public TagFilterPattern(PrototypeMeasurementFilterSpecification.TagFilterSpecification spec) {
if (spec == null) return;
String keySpec = spec.getKey();
String valueSpec = spec.getValue();
if (keySpec != null && !keySpec.isEmpty() && !keySpec.equals(".*")) {
key = Pattern.compile(keySpec);
}
if (valueSpec != null && !valueSpec.isEmpty() && !valueSpec.equals(".*")) {
value = Pattern.compile(valueSpec);
}
}