kingluo commented on code in PR #8400:
URL: https://github.com/apache/apisix/pull/8400#discussion_r1043239482


##########
apisix/plugins/inspect.lua:
##########
@@ -0,0 +1,62 @@
+--
+-- Licensed to the Apache Software Foundation (ASF) under one or more
+-- contributor license agreements.  See the NOTICE file distributed with
+-- this work for additional information regarding copyright ownership.
+-- The ASF licenses this file to You under the Apache License, Version 2.0
+-- (the "License"); you may not use this file except in compliance with
+-- the License.  You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+local core = require("apisix.core")
+local plugin = require("apisix.plugin")
+local inspect = require("apisix.inspect")
+local ngx = ngx
+
+
+local plugin_name = "inspect"
+
+
+local schema = {
+    type = "object",
+    properties = {},
+}
+
+
+local _M = {
+    version = 0.1,
+    priority = 200,
+    name = plugin_name,
+    schema = schema,
+}
+
+
+function _M.check_schema(conf, schema_type)
+    return core.schema.check(schema, conf)
+end
+
+
+function _M.init()
+    local attr = plugin.plugin_attr(plugin_name)

Review Comment:
   This plugin is special: it's global and not associated with routes. It needs 
to load the config and run in the `init()` method, which is called when the 
plugin first loaded.
   Loading plugins happens before plugin_metadata initialization, so I think 
it's not suitable to use metadata for this plugin. And also, this plugin does 
not need to change the config at runtime.
   
   
https://github.com/apache/apisix/blob/4694685c60f1c4db57c9d3920b90567ae9e32e5c/apisix/plugin.lua#L746-L757



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