Hello, Nathan, Had Nikolay said anything about JVM modification? As far as I understand him the class library should be just enhanced with this smart class loader.
Now imagine how our reproducers would look in JIRA: java -cp http://svn.apache.org/... -Djava.system.class.loader=org.apache.harmony.Nikolagent TestClass Just cut & paste it in your console with Harmony JRE in PATH! Nikolay's class loader will manage dependencies in the class path (or should I call it source path now?), download required source files to the temporary cache, compile them and execute. This class loader can even decide should it launch the test via TestNG runner or JUnit. It can understand OSGi bundles. It can download binary modules from maven repositories worldwide. We can even think of distributed test execution over computers of Harmony community members. This can be a protocol for you to test your changes on Pavel's Linux if Pavel sets some security checkbox in his Harmony JRE allowing a trust mode for test requests from Harmony committers. Doesn't this sound cool? With best regards, Alexei Fedotov, Intel Middleware Products Division >-----Original Message----- >From: Nathan Beyer [mailto:[EMAIL PROTECTED] >Sent: Saturday, October 07, 2006 3:04 AM >To: harmony-dev@incubator.apache.org >Subject: Re: [general] Dynamic class loading > >Stefano is correct, this doesn't require anything special in the VM. >In fact, the basics of this already exist -- JavaServer Pages. > >Is compiling code a big problem? > >-Nathan > >On 10/6/06, Stefano Mazzocchi <[EMAIL PROTECTED]> wrote: >> Nikolay Chugunov wrote: >> > From the beginning of learning Java and till now I hate to compile java >> > source code before run it. I propose to develop easy solution for this >> > problem: compile java sources on fly. >> > >> > Command to do it can look like: >> > >> > >> > >> > java -cp ...:mytool.jar >> > -Djava.system.class.loader=classloader.MyClassLoaderHelloWorld >> > >> > >> > >> > When executing any application, if MyClassLoader does not find compiled >> > class in class path, it will try to find file-source of this class with >> > java >> > extension in class path. If MyClassLoader finds this file, then >> > MyClassLoader will compile source on fly and load class to >MyClassLoader >> > using *defineClass* method. >> > >> > >> > >> > The second improvement which I propose to develop is to load jar file >from >> > internet, if user specify URL to jar file in command line. >> > >> > >> > >> > MyClassLoader may cache compiled classes and loaded jars. MyClassLoader >may >> > use standard and Eclipse compiler to compile sources. Also >MyClassLoader >> > may >> > compile on fly other sources (like Jasmin). The base of my tool will be >> > existing URLClassLoader in Harmony. >> > >> > >> > What do you think about my proposals? >> >> hmmm, I've thought about implementing something like this several times >> myself.... but I don't think you need to modify a JVM to achieve that, >> you can just execute a "loader" class that than knows your "source path" >> and has access to a nice compiler and does compilation at class loading >> time. >> >> or am I wrong? >> >> -- >> Stefano. >> >> >> --------------------------------------------------------------------- >> Terms of use : http://incubator.apache.org/harmony/mailing.html >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] >> >> --------------------------------------------------------------------- Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
