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This article introduces the knowledge of "metadata Center Analysis after dubbo 2.7". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

After dubbo 2.7, dubbo provides a new feature that provides the storage of related metadata in the corresponding registry.

Taking zk as an example, the information of relevant metadata is stored under the path of zk: / dubbo/metadata/ {full name of service interface class} / provider/ {application}.

{"parameters": {"side": "provider", "release": "2.7.1", "methods": "sayHello", "deprecated": "false", "dubbo": "2.0.2", "default.dynamic": "false", "interface": "com.wuhulala.dubbo.gateway.GreetingService", "generic": "false", "default.deprecated": "false" "application": "first-dubbo-provider", "default.register": "true", "dynamic": "false", "register": "true", "anyhost": "true"}, "canonicalName": "com.wuhulala.dubbo.gateway.GreetingService", "codeSource": "file:/D:/code/github/2019-up/dubbo-gateway/dubbo-gateway-core/target/classes/" "methods": [{"name": "sayHello", "parameterTypes": ["java.lang.String"], "returnType": "java.lang.String"}], "types": [{"type": "int"}, {"type": "java.lang.String" "properties": {"value": {"type": "char []"}, "hash": {"type": "int"}}, {"type": "char"}]}

What is useful to us is the methods information, which we can use to make generalization calls.

The specific implementation references are as follows:

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