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https://issues.apache.org/jira/browse/WW-4244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harry Chan updated WW-4244:
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Summary: ShowConfigAction.execute() throws InstantiationException when the
Action has NO nullary constructor (was: ShowConfigAction.execute throws
InstantiationException when the Action has NO nullary constructor)
> ShowConfigAction.execute() throws InstantiationException when the Action has
> NO nullary constructor
> ---------------------------------------------------------------------------------------------------
>
> Key: WW-4244
> URL: https://issues.apache.org/jira/browse/WW-4244
> Project: Struts 2
> Issue Type: Bug
> Components: Plugin - Config Browser
> Affects Versions: 2.3.15.3
> Reporter: Harry Chan
>
> In my case, I use Guice for DI and constructor injection is used in many
> Actions.
> When I enable the Config Browser feature and click the Action in the Action
> information page, it shows the error message
> {quote}Unable to execute
> org.apache.struts2.config_browser.ShowConfigAction{quote}
> After a brief code tracing, I found that in the *ShowConfigAction.execute()*,
> it uses *clazz.newInstance()* for creating the action instance. And the
> java-doc of the *newInstance()* claims that *it would throw the
> InstantiationException if the class has no nullary constructor*.
> I think one of the quick fix would be added default-constructor into those
> Actions(I have tested it and it works). However, I think it would not be a
> good solution as the extra constructor is a redundancy to me and would
> increase the maintenance cost.
> I am wondering if the ShowConfigAction could use *ObjectFactory.buildBean()*
> for creating the action instance.
> P.S: Please correct me if I use the Config Browser Plugin in the wrong way.
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