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List:       struts-dev
Subject:    [jira] [Resolved] (WW-4410) Custom configuration providers accessing servlet-context
From:       "Lukasz Lenart (JIRA)" <jira () apache ! org>
Date:       2016-02-25 20:31:18
Message-ID: JIRA.12745513.1412261421000.148277.1456432278396 () Atlassian ! JIRA
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     [ https://issues.apache.org/jira/browse/WW-4410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel \
]

Lukasz Lenart resolved WW-4410.
-------------------------------
    Resolution: Fixed
      Assignee: Lukasz Lenart

> Custom configuration providers accessing servlet-context
> --------------------------------------------------------
> 
> Key: WW-4410
> URL: https://issues.apache.org/jira/browse/WW-4410
> Project: Struts 2
> Issue Type: Improvement
> Components: Dispatch Filter
> Affects Versions: 2.3.16.3
> Reporter: Lorenzo Bernacchioni
> Assignee: Lukasz Lenart
> Priority: Minor
> Labels: configuration, custom, provider, servlet-context
> Fix For: 2.3.25, 2.5
> 
> 
> I'm using custom configuration providers following the suggestion of [this \
> post|http://cppoon.wordpress.com/2013/11/11/change-apache-struts2-configuration-programmatically/comment-page-1/#comment-157].
>  I figured out that my custom configuration provider needed access to the \
> servlet-context so I patched the code in the Dispatcher class to let, in case the \
> constructor is available, instantiate a ConfigurationProvider with the \
> servlet-context as argument {code}
> private void init_CustomConfigurationProviders() {
> 	String configProvs = initParams.get("configProviders");
> 	if (configProvs != null) {
> 		String[] classes = configProvs.split("\\s*[,]\\s*");
> 		for (String cname : classes) {
> 			try {
> 				Class cls = ClassLoaderUtil.loadClass(cname, this.getClass());
> 				
> 				ConfigurationProvider prov;
> 				try {
> 					Constructor constructor = cls.getConstructor(ServletContext.class);
> 					prov = (ConfigurationProvider)constructor.newInstance(servletContext);
> 				} catch (Exception e) {
> 					prov = (ConfigurationProvider)cls.newInstance();	
> 				}
> 				configurationManager.addContainerProvider(prov);
> 			} catch (InstantiationException e) {
> 				throw new ConfigurationException("Unable to instantiate provider: "+cname, e);
> 			} catch (IllegalAccessException e) {
> 				throw new ConfigurationException("Unable to access provider: "+cname, e);
> 			} catch (ClassNotFoundException e) {
> 				throw new ConfigurationException("Unable to locate provider class: "+cname, e);
> 			}
> 		}
> 	}
> }
> {code}



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