2012/4/7 <souvik.da...@wipro.com>: > Hello Chris, > > Thanks a lot for responding to my post. > > [Chris]What do you mean "not able to access its content"? Do you get 404s? > 500s? Does the thread hang? Does the JVM crash? > > [Souvik]: When I am trying to access the content of usb_1, I am getting 404 > error. > Here are the details: > HTTP Status 404 > message < This is blank> > description The requested resource () is not available. > > [Souvik] > > [Chris]Q:What about starting Tomcat with no USB devices, then trying to > access the resources, then attaching the devices and trying again? > Ans: Only usb_0 works. > > [Chris]Q:What happens when both devices are connected *before* you start > Tomcat? > Ans: Only in this case I could access both the devices. > > [Chris] Honestly, I'm not sure why you'd want to run a web server off a device > which isn't guaranteed to be available. > > [Souvik] Actually I am developing a HTML5 App which would run on an embedded > target. One of the functionalities of the application is to allow user to > playback and browse the media content available in an USB stick. Since I am > using Webkit browser so some features of HTML5 do not run from file:// url > and therefore the pages need to be served from a local web server. I have > chosen tomcat for that. > > So it seems to achieve my goal, I need to first connect usb sticks to all the > available usb ports on my target and then start tomcat6. As mentioned by > you,is the server keeping this information in the cache so that in future > when a USB device is connected to a port, it is able to make that out? > Is this understanding correct?
1. You are (ab)using Tomcat Autodeployment feature. If docbase of a webapp is not readable, it really cannot start. (Just a guess. If you looked at the logs your would see it more clearly). 2. It is possible to control deployment process via JMX. That is to deploy new contexts when needed - the Manager webapp does that. But I think that using contexts to display those USB sticks is not a good thing. One thing to beware is that when application is undeployed all its contents is deleted (so you risk to delete all data from that USB stick). I think it would be better to write a servlet that will serve static files from the stick. It should not be hard. It might be based on Tomcat's DefaultServlet, but actually yours can be more simple: 1. You do not need to use servlet API to get the resources. You have to use direct file access using java.io. 2. Your access is read-only. You do not need to support writing. Best regards, Konstantin Kolinko --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
