问题
I just realized a JSF (web JavaScript application) that connect to a MongoDB database and generate a report (PDF) thanks to JasperReports Library (so with a .java file).
Is it possible to do the same thing with a web application in CoffeeScript and Node.js? I am really new to this, so I don't know where to start.
For example: Is it possible to run a .java thanks to Node.js or CoffeeScript?
回答1:
JSF is actually a JavaServer Faces application, not a JavaScript application. JavaScript (which Node.js, CoffeeScript are based on) is not equivalent to Java despite the similarity in names.
If you already have a JSF-based application then you already should have everything you need to create a web-based application. There is no need for Node.js, CoffeeScript, etc.
Go take a look at JSP, Tomcat, etc. to figure out how to render web pages rather than output to PDF and you should be set.
回答2:
If you want to rewrite your application in javascript and run it on node.js, you should be able to use PDFKit to build the PDFs.
If you only wish to use your existing application and integrate it with a node.js server, I think you would be wise to run them in parallel (or proxy requests to your JSF application through node, in case that makes sense). It's hard to give a better answer unless you can state more clearly what it is you want to accomplish.
回答3:
Yes, it's possible. You can start / stop / control another process with Node.js - so You can start .java in another process and use it to generate PDF. But ... it may be not very efficient in terms of resource usage, so it's an open question.
Or, you can write a simple worker that will generate PDF from JSON data and use 0MQ or other inter-process communications between Node.js and this Java worker.
He-he, JSF was one of the worst technologies I ever saw (I believe it's still in the same state now as it was in 2007 when I left Java), even dumb JSP and servlets was better...
来源：https://stackoverflow.com/questions/9499579/coffeescript-node-js-mongodb-and-jasperreports-is-it-possible