Hello struts-dev,
This day I start to build new service for ServiceManager -
CommandService. It would be based on FactoryService (early published
as BeanFactory).
FactoryService (as BeanFactory) build on base of Abstract Factory
pattern. So its idea is to generate beans and store it to the some
context. Now I found such approach as limited.
CommandService idea is based on Command pattern. There are two
entity types on playground - Command and Processor. Processor's
missing is to perform Command and prepare predefined count of result
objects. Every action can contain list of calls to the Processors
with appropriate Commands. The most simple way to pass results from
on Porcessor to another is to perfom processing and store result in
some context (request, session, etc.). More flexible way is to
write nested calls to the Processors with appropriate Commands. And
generally all this stuff (set of Processors and
Commands) can be used to build some kind of scripting in
struts-config.xml with BSF framework.
Example of service manager config in struts-config -
<service-manager>
<process-registrations>
<process-registration name="preprocess"/>
</process-registrations>
<service-registrations>
<service-registration
name="command"
type="org.apache.struts.service.command.CommandService"
useDigester="true">
<command-service>
<processors>
<processor name="jdbcUpdate" type="some.package.Class">
<result
name="totalUpdated"
type="java.lang.Integer"/>
</processor>
</processors>
<commands>
<command
name="createUser"
command="insert into rb.user( name ) values ( ? )">
<processors>
<processor name="jdbcUpdate"/>
</processors>
<parameter
name="method"
type="java.lang.String"
value="preparedStatement"/>
<parameter
name="userName"
type="java.lang.String"/>
</command>
</commands>
</command-service>
</service-registrations>
</service-manager>
<action-mappings>
<action path="/user/insert"
type="some.package.Action"
name="userForm"
input="/WEB-INF/jsp/userEdit.jsp">
<perform-command name="createUser"/>
<forward name="success" path="/WEB-INF/jsp/userList.jsp"/>
</action>
</action-mappings>
--
Best regards,
Oleg mailto:[EMAIL PROTECTED]
