public RuleData obtainRuleData(final String pluginName, final String path) {
        final Map<String, RuleData> lruMap = RULE_DATA_MAP.get(pluginName);
        return Optional.ofNullable(lruMap).orElse(Maps.newHashMap()).get(path);
    }
get rule data.

@param pluginName pluginName
@param path path
@return ruleData
shenyu-plugin/shenyu-plugin-base/src/main/java/org/apache/shenyu/plugin/base/cache/MatchDataCache.java