Generally
speaking you will only need one dwr.xml file and that will be in the default
position: WEB-INF/dwr.xml.
So you can leave this paramter out.
There
are 3 reasons why you might wish to specify a different position for
dwr.xml:
· You
wish to keep dwr.xml with the files that it gives access to. In which case the
section might have a param-value something like <param-value>WEB-INF/classes/com/yourco/dwr/dwr.xml</param-value>.
· You
may have a large number of remoted classes and wish to keep the definitions in
separate files. In this case you will have the section above repeated several
times each with a different param-name
that begins 'config' and each pointing at a different file. DWR will read them
all in turn.
· DWR
can use J2EE URL security built into the servlet spec to give different groups
of users access to different functions. You simply define more than one dwr
servlet by repeating the stanza at the top of the page with different names,
urls and permissions.
If
you do wish to use it then the syntax is as follows:
<init-param> <param-name>config*****</param-name> <param-value>WEB-INF/dwr.xml</param-value> <description>What config file do we use?</description></init-param>Where
config***** means any param-name that begins with the string 'config'. This
parameter can be specified as many times as required, however the param-name
should be different for each.
An
example configuration to use J2EE servlet security is as
follows:
<servlet> <servlet-name>dwr-user-invoker</servlet-name> <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class> <init-param> <param-name>config-user</param-name> <param-value>WEB-INF/dwr-user.xml</param-value> </init-param></servlet><servlet> <servlet-name>dwr-admin-invoker</servlet-name> <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class> <init-param> <param-name>config-admin</param-name> <param-value>WEB-INF/dwr-admin.xml</param-value> </init-param></servlet><servlet-mapping> <servlet-name>dwr-admin-invoker</servlet-name> <url-pattern>/dwradmin/*</url-pattern></servlet-mapping><servlet-mapping> <servlet-name>dwr-user-invoker</servlet-name> <url-pattern>/dwruser/*</url-pattern></servlet-mapping> <security-constraint> <display-name>dwr-admin</display-name> <web-resource-collection> <web-resource-name>dwr-admin-collection</web-resource-name> <url-pattern>/dwradmin/*</url-pattern> </web-resource-collection> <auth-constraint> <role-name>admin</role-name> </auth-constraint></security-constraint><security-constraint> <display-name>dwr-user</display-name> <web-resource-collection> <web-resource-name>dwr-user-collection</web-resource-name> <url-pattern>/dwruser/*</url-pattern> </web-resource-collection> <auth-constraint> <role-name>user</role-name> </auth-constraint></security-constraint>Powered by ScribeFire.
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