THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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| Code Block |
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public class ExceptionsMethodLevelAction {
@Action(value = "exception1", exceptionMappings = {
@ExceptionMapping(exception = "java.lang.NullPointerException", result = "success", params = {"param1", "val1"})
})
public String run1() throws Exception {
return null;
}
}
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Actions in jar files
By default the Convention plugin will not scan jar files for actions. To enable jar scanning, two things need to be done:
- Enable jar scanning
Code Block xml xml <constant name="struts.convention.action.disableJarScanning" value="false"/> - Add regular expressions that match the URL of the jar file
Please note that the regular expression will be evaluated against the URL of the jar, and not the name only.Code Block xml xml <constant name="struts.convention.action.includeJars" value=".*/myjar1-.*?jar(!/)?,.*/myjar2-.*?jar(!/)?"
Automatic configuration reloading
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- I get an error like "There is no Action mapped for namespace /orders and action name view.". This means that the URL /orders/view.action is not mapping to any action class. Check the namespace and the name of the action.
- I get an error like "No result defined for action "my.example.actions.orders.ViewAction and result success". This means that the action was mapped to the right URL, but the Convention plugin was unable to find a success result for it. Check that the result file exists, like /WEB-INF/content/orders/view-success.jsp, like /WEB-INF/content/orders/view-success.jsp.
- I get lots of errors like "java.lang.Exception: Could not load org/apache/velocity/runtime/resource/loader/ClasspathResourceLoader.class". This happens when struts.convention.action.disableJarScanning is false, and struts.convention.action.includeJars is matching jar URLs from external jars.
Configuration reference
Add a constant element to your struts config file to change the value of a configuration setting, like:
...
Name | Default Value | Description |
|---|---|---|
struts.convention.action.disableJarScanning | true | Scan jar files for actions |
struts.convention.action.includeJars |
| Comma separated list of regular expressions of jar URLs to be scanned (ignored unless struts.convention.action.disableJarScanning is false) |
struts.convention.action.packages |
| An optional list of action packages that this should create configuration for (they don't need to match a locator pattern) |
struts.convention.result.path | /WEB-INF/content/ | Directory where templates are located |
struts.convention.result.flatLayout | true | If set to false, the result can be put in its own directory: resultsRoot/namespace/actionName/result.extension |
struts.convention.action.suffix | Action | Suffix used to find actions based on class names |
struts.convention.action.disableScanning | false | Scan packages for actions |
struts.convention.action.mapAllMatches | false | Create action mappings, even if no @Action is found |
struts.convention.action.checkImplementsAction | true | Check if an action implements com.opensymphony.xwork2.Action to create an action mapping |
struts.convention.default.parent.package | convention-default | Default parent package for action mappins |
struts.convention.action.name.lowercase | true | Convert action name to lowercase |
struts.convention.action.name.separator | - | Separator used to build the action name, MyAction -> my-action. This character is also used as the separator between the action name and the result in templates, like action-result.jsp |
struts.convention.package.locators | action,actions,struts,struts2 | Packages whose name end with one of these strings will be scanned for actions |
struts.convention.package.locators.disable | false | Disable the scanning of packages based on package locators |
struts.convention.exclude.packages | org.apache.struts.*, | Packages excluded from the action scanning |
struts.convention.package.locators.basePackage |
| If set, only packages that start with its value will be scanned for actions |
struts.convention.relative.result.types | dispatcher,velocity,freemarker | The list of result types that can have locations that are relative and the result location (which is the resultPath plus the namespace) prepended to them |
struts.convention.redirect.to.slash | true | A boolean parameter that controls whether or not this will handle unknown actions in the same manner as Apache, Tomcat and other web servers. This handling will send back a redirect for URLs such as /foo to /foo/ if there doesn't exist an action that responds to /foo |