External Web Application Resources Access

With WebSphere or Tomcat Web servers, it is possible to specify resources external to a Web application that are accessed via a URL. Adelia first attempts to use the URL; if no URL has been specified, Adelia searches for the file in the execution context.

The following Adelia runtime configuration files are managed as external resources:

• The CfgConfiguration.properties file
  URL: url/adelia/CfgConfiguration.

• Middleware session pool configuration files
  URL: url/adelia/poolSession_<PoolName>
  (where PoolName = Pool in the case of the Pool.properties file (pool by default))

• Middleware session preparer configuration files
  URL: url/adelia/SessionPrep_<SessionPreparerName>

• The MWCLIENT.INI file
  The reference to the file or URL is made via the ID_FILE_CONFIG key:
  ID_FILE_CONFIG = [URL]<reference resource name>;<(complete) name of real file>
  Example: ID_FILE_CONFIG =[URL]url/myMwClient;MWCLIENT.INI

• The MWSERVER.INI file
  The reference to the file or URL is made via the ID_FILE_CONFIG_SRV key:
  ID_FILE_CONFIG_SRV = [URL]<reference resource name>;<(complete) name of real file>

• The apiva.properties file
  The reference to the file or URL is made via the ID_FILE_CONFIG_APIVA key:
  ID_FILE_CONFIG_APIVA  =[URL]url/apiva;apiva.properties

• The CfgWebServices.xml file
  The reference to the file or URL is made via the ID_FILE_CONFIG_WEBSERVICES key:
  ID_FILE_CONFIG_WEBSERVICES=[URL]url/cfgwebservices;CfgWebServices.xml

• The log4j2.xml file
  The reference to the file or URL is made via the ID_FILE_CONFIG_LOG4J key:
  ID_FILE_CONFIG_LOG4J=[URL]url/log4j;log4j2.xml

Implementation

• Any external resources must be declared in the Web application's web.xml file, as follows:

<resource-ref id="ResourceUrl_on_myfile">

<description>url on myfile</description>

<res-ref-name>url/myfile</res-ref-name>

<res-type>java.net.URL</res-type>

<res-auth>Container</res-auth>

<res-sharing-scope>Shareable</res-sharing-scope>

</resource-ref>

• Click the following link for information on defining resources in WebSphere:
  http://www-128.ibm.com/developerworks/websphere/library/techarticles/0502_botzum/0502_botzum.html. Information is also available from the Websphere Infocenter, using the keywords "Using URL resources within an application", or "Outsourcing Web application resources".

• For Tomcat, a resource is defined by specifying the following <Resource> tag in the server.xml file or associated context XML file (conf/localhost/MyApp.xml):

<Context crossContext="true" debug="5" docBase="MonAppli" path="/MonAppli" reloadable="true">

...

<Resource auth="Container"  name="url/monfichier" factory="com.hardis.adelia.common.URLFactory" type="java.net.URL" url="file:///c:/MonRepertoire/fichier.xxx" />

...

</Context>

Note:

In order to allow ".properties" files that contain application settings to be accessed as external resources, the VaToolBxJavaQueryValue function in the VaToolBx DLL takes into account any resources defined as URLs.

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