public static String getStringFromContext(Context context, String key, String defaultValue) {
        String value = context.getString(key);
        value = (value != null) ? value : getInstance().getProperties().getOrDefault(key, defaultValue);
        return value;
    }
getStringFromContext

@param context
@param key
@param defaultValue
@return
inlong-dataproxy/dataproxy-source/src/main/java/org/apache/inlong/dataproxy/config/CommonConfigHolder.java