Fix HSF-0009 error due to unimplemented service interface - Enterprise Distributed Application Service

This error occurs when an HSF provider bean does not implement the declared service interface. Use the following information to diagnose and fix the issue.

Error message

java.lang.IllegalArgumentException: The specified interface [<interface-name>] is not implemented in the real service object [<service-object>].

Example:

java.lang.IllegalArgumentException: The specified interface [com.taobao.hsf.jar.test.HelloWorldService] is not implemented in the real service object [com.taobao.hsf.jar.test.HelloWorldServiceImpl@10f0a3e8].

Placeholder	Description
`<interface-name>`	The Java interface declared in the HSF provider configuration.
`<service-object>`	The bean instance that HSF attempts to publish.

Cause

The bean specified in the target property of the HSF provider does not implement the declared service interface. HSF validates the implements relationship at publish time and throws this IllegalArgumentException when the check fails.

Possible causes

The provider bean class does not include the service interface in its implements clause.
The interface name or bean class name in the HSF provider configuration contains a typo.
The bean class implements a different version of the interface (package name mismatch).

Solution

Verify that the provider bean class implements the declared service interface and that the configuration references the correct class names.

Open the provider bean class and confirm it implements the interface specified in your HSF provider configuration.

Incorrect (triggers HSF-0009):

// The provider bean does NOT implement the service interface
public class HelloWorldServiceImpl {
    public String sayHello(String name) {
        return "Hello, " + name;
    }
}

Correct:

// The provider bean implements the service interface
public class HelloWorldServiceImpl implements HelloWorldService {
    @Override
    public String sayHello(String name) {
        return "Hello, " + name;
    }
}