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Java Forum / General / May 2006Where do the Java imports exist?
I work from home and connect to the office over a VPN. When I'm connected to the office, it takes over 5 minutes for me to create a web service using IBM Rational Application Developer 6.0. When I am not connected to the VPN, it takes about a minute. Under both scenarios, the java source code is local on my machine. I had our network guy run a packet trace and the slow down was Rational attempting to resolve things like java.io. It can't find it on the internet, so then it attempts java.io.<company name>.com. Eventually it times out and goes onto the next one. Where does java.io actually exist? I thought it was local on my machine as part of the java or Rational installation. Does it actually go out to the internet for these imports? Is there a way to tell Rational a specific place to look? Your development environment must be seriously f.cked up if it looks for something that is installed locally on a remote machine... RTFM and get your system set up correctly, most likely you have foolishly told it to do something it shouldn't, like connect to your company servers for things that are on your harddrive (either that or IBM has done something foolish in creating their "tools", wouldn't be the first time). >I work from home and connect to the office over a VPN. When I'm > connected to the office, it takes over 5 minutes for me to create a web [quoted text clipped - 8 lines] > Does it actually go out to the internet for these imports? Is there a > way to tell Rational a specific place to look? > I work from home and connect to the office over a VPN. When I'm > connected to the office, it takes over 5 minutes for me to create a web [quoted text clipped - 8 lines] > Does it actually go out to the internet for these imports? Is there a > way to tell Rational a specific place to look? It's in rt.jar Mark Thanks, Mark. I located the rt.jar file and included it in my ClassPath statement. It didn't make a difference. Is there something else I need to do with it? >Thanks, Mark. I located the rt.jar file and included it in my >ClassPath statement. It didn't make a difference. Is there something >else I need to do with it? You don't put rt.jar on the classpath. It is included automatically. See http://mindprod.com/jgloss/classpath.html  SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. If it's included automatically, do you know why it might be looking on the internet rather than on my local machine? > If it's included automatically, do you know why it might be looking on > the internet rather than on my local machine? Relatively few people run Rational; the high price tag gives it a very limited distribution. Also your problem sounds very strange to me. Basically you java compiler is "looking on the network" for basic required components. What network? Via what protocol? Do you have a build procedure that works outside your IDE? Say, an ANT script that you can run from a shell with a standard JDK? What happens if you disable the network entirely? Have you put your question on any IBM forums? >If it's included automatically, do you know why it might be looking on >the internet rather than on my local machine? Java.exe wakes up and looks in the registry to find the current JVM. That is how it finds rt.jar. What is your evidence it is looking on the Internet for rt.jar? Assuming it truly is, check out the registry entries to see if they are screwed. You might consider uninstalling all Java, wiping out all registry entries and starting from scratch installing JVMs and JREs in chronological order, ideally just one. see http://mindprod.com/jgloss/jdk.html http://mindprod.com/jgloss/registry.html SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. > Thanks, Mark. I located the rt.jar file and included it in my > ClassPath statement. It didn't make a difference. Is there something > else I need to do with it? If you are using Sun's JDK with the IBM front-end, (I don't know your toolset), the system finds rt.jar (formally classes.zip) by looking in the "bootclasspath". Both javac and java have a bootclasspath command line argument to allow you to over-ride the default location, which in your case appears to be messed up somehow. As a temporary measure try to set the bootclasspath command line argument for your IBM tool, and see if that helps. The default bootclasspath is probably stored in a config file someplace, or in the registry for windows. Search for "rt.jar", and change the bad network location to your local location. but make sure you have the right version! -Wayne Pollock Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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