@Override
    public void notify(ConfigChangeEvent value) {
        if (EventType.DELETE.equals(value.getEventType())) {
            activeSetting(null);
        } else {
            activeSetting(value.getNewValue());
        }
    }
Apdex threshold configuration dictionary adapter. Looking up a service apdex threshold from dynamic config service.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/ApdexThresholdConfig.java