Re: How Do I Tell Clojure Which Classloader to Use?
I found the answer and fixed it and it works! Yes, *use-context-classloader* is true by default. But, the context classloader wasn't the right classloader, so I had to set context classloader to the right classloader, at the right place before any clojure code is called like this: Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader()); Whoop! Found this online which also helped me figure this out: http://www.assembla.com/spaces/clojure/tickets/260-cannot-load-clojure-classes-from-jar-files-outside-classpath-using-urlclassloader Mudge On Jul 5, 4:53 am, Chas Emerick wrote: > Clojure does use the context classloader by default for its "root" > classloader (on top of which it sometimes creates new > DynamicCLassloaders). This behaviour is controlled by the value of > *use-context-classloader*, which is true by default. > > I don't have any java web start experience, so I'm afraid I can't > provide any further advice. Anyone else here that does? > > - Chas > > On Jul 4, 2010, at 6:53 AM, Nick Mudge wrote: > > > I am writing a 3rd party module in Clojure for a Java Web Start > > application written in Java. > > > I am using Clojure 1.1. > > > I think that my clojure program and clojure.jar are on the classpath > > and are being loaded because when clojure.jar is not seen on the class > > path this error results: java.lang.ClassNotFoundException: > > clojure.lang.IFn > > I am not getting that error so I think that my clojure program and > > clojure.jar are seen on the classpath and are being loaded. > > > This is the error I am getting: > > Could not locate clojure/core__init.class or clojure/core.clj on > > classpath > > > I think that clojure uses the system classloader by default. Is this > > correct? However, according to the Java Web Start documentation, the > > system classloader doesn't work with Java Web Start: > >http://java.sun.com/j2se/1.5.0/docs/guide/javaws/developersguide/faq > > > The Java Web Start documentation says that the following classloader > > should be used: > > ClassLoader cl = Thread.getCurrent().getContextClassLoader(); > > > My question is, how do I tell clojure to use this classloader so that > > clojure can load it's own code? > > > -- > > You received this message because you are subscribed to the Google > > Groups "Clojure" group. > > To post to this group, send email to clojure@googlegroups.com > > Note that posts from new members are moderated - please be patient > > with your first post. > > To unsubscribe from this group, send email to > > clojure+unsubscr...@googlegroups.com > > For more options, visit this group at > >http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How Do I Tell Clojure Which Classloader to Use?
Is there a way to tell which classloader clojure is using? On Jul 5, 4:53 am, Chas Emerick wrote: > Clojure does use the context classloader by default for its "root" > classloader (on top of which it sometimes creates new > DynamicCLassloaders). This behaviour is controlled by the value of > *use-context-classloader*, which is true by default. > > I don't have any java web start experience, so I'm afraid I can't > provide any further advice. Anyone else here that does? > > - Chas > > On Jul 4, 2010, at 6:53 AM, Nick Mudge wrote: > > > I am writing a 3rd party module in Clojure for a Java Web Start > > application written in Java. > > > I am using Clojure 1.1. > > > I think that my clojure program and clojure.jar are on the classpath > > and are being loaded because when clojure.jar is not seen on the class > > path this error results: java.lang.ClassNotFoundException: > > clojure.lang.IFn > > I am not getting that error so I think that my clojure program and > > clojure.jar are seen on the classpath and are being loaded. > > > This is the error I am getting: > > Could not locate clojure/core__init.class or clojure/core.clj on > > classpath > > > I think that clojure uses the system classloader by default. Is this > > correct? However, according to the Java Web Start documentation, the > > system classloader doesn't work with Java Web Start: > >http://java.sun.com/j2se/1.5.0/docs/guide/javaws/developersguide/faq > > > The Java Web Start documentation says that the following classloader > > should be used: > > ClassLoader cl = Thread.getCurrent().getContextClassLoader(); > > > My question is, how do I tell clojure to use this classloader so that > > clojure can load it's own code? > > > -- > > You received this message because you are subscribed to the Google > > Groups "Clojure" group. > > To post to this group, send email to clojure@googlegroups.com > > Note that posts from new members are moderated - please be patient > > with your first post. > > To unsubscribe from this group, send email to > > clojure+unsubscr...@googlegroups.com > > For more options, visit this group at > >http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How Do I Tell Clojure Which Classloader to Use?
Also I should note that all my clojure code is compiled to classes and the classes are jarred and sent to the Java Web Start program along with clojure.jar. On Jul 4, 3:53 am, Nick Mudge wrote: > I am writing a 3rd party module in Clojure for a Java Web Start > application written in Java. > > I am using Clojure 1.1. > > I think that my clojure program and clojure.jar are on the classpath > and are being loaded because when clojure.jar is not seen on the class > path this error results: java.lang.ClassNotFoundException: > clojure.lang.IFn > I am not getting that error so I think that my clojure program and > clojure.jar are seen on the classpath and are being loaded. > > This is the error I am getting: > Could not locate clojure/core__init.class or clojure/core.clj on > classpath > > I think that clojure uses the system classloader by default. Is this > correct? However, according to the Java Web Start documentation, the > system classloader doesn't work with Java Web > Start:http://java.sun.com/j2se/1.5.0/docs/guide/javaws/developersguide/faq > > The Java Web Start documentation says that the following classloader > should be used: > ClassLoader cl = Thread.getCurrent().getContextClassLoader(); > > My question is, how do I tell clojure to use this classloader so that > clojure can load it's own code? -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: How Do I Tell Clojure Which Classloader to Use?
Clojure does use the context classloader by default for its "root" classloader (on top of which it sometimes creates new DynamicCLassloaders). This behaviour is controlled by the value of *use-context-classloader*, which is true by default. I don't have any java web start experience, so I'm afraid I can't provide any further advice. Anyone else here that does? - Chas On Jul 4, 2010, at 6:53 AM, Nick Mudge wrote: I am writing a 3rd party module in Clojure for a Java Web Start application written in Java. I am using Clojure 1.1. I think that my clojure program and clojure.jar are on the classpath and are being loaded because when clojure.jar is not seen on the class path this error results: java.lang.ClassNotFoundException: clojure.lang.IFn I am not getting that error so I think that my clojure program and clojure.jar are seen on the classpath and are being loaded. This is the error I am getting: Could not locate clojure/core__init.class or clojure/core.clj on classpath I think that clojure uses the system classloader by default. Is this correct? However, according to the Java Web Start documentation, the system classloader doesn't work with Java Web Start: http://java.sun.com/j2se/1.5.0/docs/guide/javaws/developersguide/faq.html#211 The Java Web Start documentation says that the following classloader should be used: ClassLoader cl = Thread.getCurrent().getContextClassLoader(); My question is, how do I tell clojure to use this classloader so that clojure can load it's own code? -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
How Do I Tell Clojure Which Classloader to Use?
I am writing a 3rd party module in Clojure for a Java Web Start application written in Java. I am using Clojure 1.1. I think that my clojure program and clojure.jar are on the classpath and are being loaded because when clojure.jar is not seen on the class path this error results: java.lang.ClassNotFoundException: clojure.lang.IFn I am not getting that error so I think that my clojure program and clojure.jar are seen on the classpath and are being loaded. This is the error I am getting: Could not locate clojure/core__init.class or clojure/core.clj on classpath I think that clojure uses the system classloader by default. Is this correct? However, according to the Java Web Start documentation, the system classloader doesn't work with Java Web Start: http://java.sun.com/j2se/1.5.0/docs/guide/javaws/developersguide/faq.html#211 The Java Web Start documentation says that the following classloader should be used: ClassLoader cl = Thread.getCurrent().getContextClassLoader(); My question is, how do I tell clojure to use this classloader so that clojure can load it's own code? -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
