[Proposal] Framework plugin architecture (was Re: [s2] Logging levels)

Don Brown Mon, 11 Sep 2006 16:32:55 -0700

The way I propose to solve this problem is to implement "FrameworkPlugins". A framework plugin is a jar that contains framework extensionclasses and configuration, which only need to be dropped into theclasspath to be activated.

A plugin would consist of:

- struts-default.xml: A Struts config file defining the interceptors,interceptor stacks, results, packages, and/or actions

- The Java classes and resources

On startup, Struts would search for and load all the struts-default.xmlfiles first, then load the application-specific struts.xml files. Thiswould allow you to easily install and use a plugin as easily as copyinga jar file into your application.

Each plugin's would define its own package that contains its results,interceptors, and actions. Then, for an application to use the plugin,simply have its packages extend the plugin's package(s):


<package name="myApp" extends="default,jsf,jasper">....</package>

Initial candidates for plugins would be:
- JSF support
- Jasper Reports support
- Pell support

To implement this proposal, we would need to split out the jasper, pell,and jsf code into their own artifacts and give them their ownstruts-default.xml file. We could extend the framework idea to extractany code that uses an optional jar, including support for things likeSpring or Velocity. This would make a nice one-to-one mapping betweenoptional jars and their Struts plugin, and would simplify core to boot.


Of course, this would be targeted for 2.0.1 :)

Don

Ted Husted wrote:

On 9/11/06, Don Brown <[EMAIL PROTECTED]> wrote:

Make sure you get the latest xwork, as a lot of the changes where inthere.

I updated XWork, but now there are even more logging statements thanbefore :(


Sep 11, 2006 5:21:05 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2546 ms
Sep 11, 2006 5:21:06 PM
com.opensymphony.xwork2.config.providers.InterceptorBuilder
constructInterceptorReference
WARNING: Unable to load config class
org.apache.struts2.jsf.FacesSetupInterceptor at interceptor -

jar:file:/C:/opt/Apache/Tomcat-5.5/webapps/struts2-mailreader/WEB-INF/lib/struts2-core-2.0.0.jar!/struts-default.xml:57:97

probably due to a missing jar, which might be fine if you never plan
to use the jsfSetup interceptor
Sep 11, 2006 5:21:06 PM
com.opensymphony.xwork2.config.providers.InterceptorBuilder
constructInterceptorReference
WARNING: Unable to load config class
org.apache.struts2.jsf.RestoreViewInterceptor at interceptor -

jar:file:/C:/opt/Apache/Tomcat-5.5/webapps/struts2-mailreader/WEB-INF/lib/struts2-core-2.0.0.jar!/struts-default.xml:58:100

probably due to a missing jar, which might be fine if you never plan
to use the jsfRestore interceptor
Sep 11, 2006 5:21:06 PM
com.opensymphony.xwork2.config.providers.InterceptorBuilder
constructInterceptorReference
WARNING: Unable to load config class
org.apache.struts2.jsf.ApplyRequestValuesInterceptor at interceptor -

jar:file:/C:/opt/Apache/Tomcat-5.5/webapps/struts2-mailreader/WEB-INF/lib/struts2-core-2.0.0.jar!/struts-default.xml:59:105

probably due to a missing jar, which might be fine if you never plan
to use the jsfApply interceptor
Sep 11, 2006 5:21:06 PM
com.opensymphony.xwork2.config.providers.InterceptorBuilder
constructInterceptorReference
WARNING: Unable to load config class
org.apache.struts2.jsf.ProcessValidationsInterceptor at interceptor -

jar:file:/C:/opt/Apache/Tomcat-5.5/webapps/struts2-mailreader/WEB-INF/lib/struts2-core-2.0.0.jar!/struts-default.xml:60:108

probably due to a missing jar, which might be fine if you never plan
to use the jsfValidate interceptor
Sep 11, 2006 5:21:06 PM
com.opensymphony.xwork2.config.providers.InterceptorBuilder
constructInterceptorReference
WARNING: Unable to load config class
org.apache.struts2.jsf.UpdateModelValuesInterceptor at interceptor -

jar:file:/C:/opt/Apache/Tomcat-5.5/webapps/struts2-mailreader/WEB-INF/lib/struts2-core-2.0.0.jar!/struts-default.xml:61:105

probably due to a missing jar, which might be fine if you never plan
to use the jsfUpdate interceptor
Sep 11, 2006 5:21:06 PM
com.opensymphony.xwork2.config.providers.InterceptorBuilder
constructInterceptorReference
WARNING: Unable to load config class
org.apache.struts2.jsf.InvokeApplicationInterceptor at interceptor -

jar:file:/C:/opt/Apache/Tomcat-5.5/webapps/struts2-mailreader/WEB-INF/lib/struts2-core-2.0.0.jar!/struts-default.xml:62:105

probably due to a missing jar, which might be fine if you never plan
to use the jsfInvoke interceptor
Sep 11, 2006 5:21:09 PM
com.opensymphony.xwork2.config.providers.InterceptorBuilder
constructInterceptorReference
WARNING: Unable to load config class
org.apache.struts2.jsf.FacesSetupInterceptor at interceptor -