On 17/10/2019 11:00, Rony G. Flatscher (Apache) wrote: > Being interested in analyzing what is needed to enable Tomcat JSP's to > be deployable with any Java scripting languages (i.e. with > javax.script.ScriptEngines) instead of Java.
A potentially huge amount of work if you propose replicating JSP functionality (tag libraries, EL support, etc.) but with a different language. > Motivation: there are programmers who are not able to program in Java, > but have broad expertise in programming with other languages like > Javascript, PHP, Rexx, Python, etc. If such programmers could devise > JSPs using their programming language of choice instead of (or in > addition to) Java, they would become able to take advantage of Tomcat. > > Idea: since Java 6 the javax.script package defines a Java scripting > framework which can be used to generically create the Java program > necessary to deploy the code in JSPs. E.g. the 'request' and 'response' > objects could be supplied as arguments via the > ScriptContext.ENGINGE_SCOPE Bindings in a Java array named > ScriptEngine.ARGV, but also objects like 'out' could be made available > to all Java scripting languages. This in essence should allow any (JVM) > langugage implementing a javax.script.ScriptEngine to be used as a > programming language in a JSP by merely denoting its name in "<%@ page > language="LANGUAGE" contentType="text/html"%>, where LANGUAGE could then > be e.g. "javascript", "jython", "netrexx", "rexx", ... instead of "java". > > The question(s): > > * Where would one find a document/tutorial with a conceptual overview > of processing a JSP file? The JSP specification. https://cwiki.apache.org/confluence/display/tomcat/Specifications > * Which class(es) are used to process JSPs with the language attribute > set to "java" in the current implementation of Tomcat, assuming that > it would be feasible to subclass (or create alternatives of) those > class(es) to add generic support for JSR223 (javax.script.ScriptEngine)? org.apache.jasper.* Mark --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org
