Author: remy.maucherat(a)jboss.com Date: 2013-10-01 11:11:54 -0400 (Tue, 01 Oct 2013) New Revision: 2272 Modified: branches/7.4.x/webapps/docs/aio.xml Log: Fix the doc on IO, for sendfile and mention websockets features. Modified: branches/7.4.x/webapps/docs/aio.xml =================================================================== --- branches/7.4.x/webapps/docs/aio.xml 2013-10-01 10:31:15 UTC (rev 2271) +++ branches/7.4.x/webapps/docs/aio.xml 2013-10-01 15:11:54 UTC (rev 2272) @@ -406,29 +406,49 @@ asynchronously in the most efficient way. Instead of sending a large response using blocking writes, it is possible to write content to a static file, and write it using a sendfile code. A caching valve could take advantage of this to cache the - response data in a file rather than store it in memory. Sendfile support is - available if the request attribute <code>org.apache.tomcat.sendfile.support</code> - is set to <code>Boolean.TRUE</code>. + response data in a file rather than store it in memory. </p> <p> Any servlet can instruct JBoss Web to perform a sendfile call by setting the appropriate response attributes. It is also necessary to correctly set the content length - for the response. When using sendfile, it is best to ensure that neither the + for the response. When using sendfile, it is usually necessary to ensure that neither the request or response have been wrapped, since as the response body will be sent later - by the connector itself, it cannot be filtered. Other than setting the 3 needed - request attributes, the servlet should not send any response data, but it may use - any method which will result in modifying the response header (like setting cookies). + by the connector itself, it cannot be filtered. The servlet should not send any response data, + but it may use any method which will result in modifying the response header (like setting cookies). </p> - <ul> - <li>org.apache.tomcat.sendfile.filename: Canonical filename of the file which will be sent as - a String</li> - <li>org.apache.tomcat.sendfile.start: Start offset as a Long</li> - <li>org.apache.tomcat.sendfile.end: End offset as a Long</li> - </ul> + <p> + The Servlet should first check if the request object can be cast to the internal + org.apache.catalina.connector.RequestFacade type, then use the hasSendfile() method to + determine if the connector used supports sendfile and has it enabled. The file content is then + sent using the sendFile(String path, String absolutePath, long start, long end) method on the + response, after casting it to the org.apache.catalina.connector.ResponseFacade type. + Path is the pathname of the file relative to the webapp root if is located inside it, + absolutePath allows sending any other file from the system (path should in this case be set + to null). Start and end specify the start and end offset of the data that should be sent. + </p> </section> + <section name="Tomcat Websockets API"> + + <p> + JBoss Web supports the Apache Tomcat 7 Websockets API which provides a ready to use + toolkit for building simple websockets enabled web applications. + </p> + + </section> + + <section name="Websockets 1.0 API"> + + <p> + JBoss Web supports the Websockets 1.0 API specification included in Java EE 7. To enable it + in your application, add a JAR declaring the org.apache.tomcat.websocket.server.WsSci + Servlet container initializer. + </p> + + </section> + </body> </document>