configuration - How do <context:include-filter> and <context:exclude-filter> work in Spring?

Question

I have several services:

• example.MailService
• example.LDAPService
• example.SQLService
• example.WebService
• example.ExcelService

annotated with @Service annotation. How can I exclude all services except one?

For example I want to use only MailService. I use the following configuration:

<context:component-scan base-package="example">
    <context:include-filter type="aspectj" expression="example..MailService*" />
    <context:exclude-filter type="aspectj" expression="example..*Service*" />
</context:component-scan>

but now all services are excluded.

Why all services are excluded if exists one rule to include MailService?

Answer 1

Another way to perform this registration is with a single inclusion filter.

<context:component-scan base-package="example" use-default-filters="false">
    <context:include-filter type="aspectj" expression="example..MailService*" />
</context:component-scan>

The "use-default-filters" attribute must be set to "false" in this case to keep Spring from adding a default filter equivalent to

<context:include-filter type="annotation" 
                        expression="org.springframework.stereotype.Component"/>