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18.6. Configuring iText

Document generation itself requires no additional configuration, but some minor configuration can make your application more user-friendly.
The default implementation serves PDF documents from a generic URL, /seam-doc.seam. Many users prefer to see a URL that contains the actual document name and extension — /myDocument.pdf, for example. To serve fully named files, the DocumentStoreServlet must contain mappings for each document type: 
<servlet> 
  <servlet-name>Document Store Servlet</servlet-name> 
  <servlet-class>
    org.jboss.seam.document.DocumentStoreServlet
  </servlet-class> 
</servlet> 
<servlet-mapping> 
  <servlet-name>Document Store Servlet</servlet-name> 
  <url-pattern>DOCUMENT_TYPE</url-pattern> 
</servlet-mapping>
DOCUMENT_TYPE can take on the following values:
  • *.pdf
  • *.xls
  • *.csv
To include multiple document types, add a <servlet-mapping> element, with <servlet-name> and <url-pattern> sub-elements, for each desired document type.
The use-extensions option instructs the DocumentStore component to generate URLs with the correct filename extension for the generated document type. 
<components xmlns="http://jboss.com/products/seam/components" 
            xmlns:document="http://jboss.com/products/seam/document" 
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
            xsi:schemaLocation=" 
                http://jboss.com/products/seam/document 
                http://jboss.com/products/seam/document-2.2.xsd 
                http://jboss.com/products/seam/components 
                http://jboss.com/products/seam/components-2.2.xsd"> 
  <document:document-store use-extensions="true"/> 
</components>
The DocumentStore holds documents in conversation scope, so documents will expire when the conversation ends. At that point, references to the document will be invalid. Specify a default view to show when a document does not exist by editing the error-page property of documentStore. 
<document:document-store use-extensions="true" 
          error-page="/documentMissing.seam" />
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