@PostMapping("/plugin/saveOrUpdate")
    public Mono<String> saveOrUpdate(@RequestBody final PluginData pluginData) {
        LOG.info("saveOrUpdate apache shenyu local plugin for {}", pluginData.getName());
        subscriber.onSubscribe(pluginData);
        return Mono.just(Constants.SUCCESS);
    }
Add plugin string.

@param pluginData the plugin data
@return the string
shenyu-web/src/main/java/org/apache/shenyu/web/controller/LocalPluginController.java