Hi Toby: Thanks for you feedback. I've did a small prototype: http://ask-me.appspot.com/ . It's working fine locally, but it's throwing the following exception when executed on the app-engine:
javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.albertattard.askme.client.utils.AssessmentTO com.albertattard.askme.client.AssessorService.assessCode(java.lang.String)' threw an unexpected exception: java.lang.VerifyError: (class: org/codehaus/janino/ByteArrayClassLoader, method: findClass signature: (Ljava/lang/String;)Ljava/lang/Class;) Illegal type in constant pool at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:360) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:546) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:166) at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86) at javax.servlet.http.HttpServlet.service(HttpServlet.java:713) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093) at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:237) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:313) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:830) at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:139) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:235) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:4823) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:4821) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:359) at com.google.net.rpc.impl.Server$2.run(Server.java:820) at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56) at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:516) at com.google.net.rpc.impl.Server.startRpc(Server.java:775) at com.google.net.rpc.impl.Server.processRequest(Server.java:348) at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:436) at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319) at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290) at com.google.net.async.Connection.handleReadEvent(Connection.java:428) at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:762) at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:207) at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:101) at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251) at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:374) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.VerifyError: (class: org/codehaus/janino/ByteArrayClassLoader, method: findClass signature: (Ljava/lang/String;)Ljava/lang/Class;) Illegal type in constant pool at org.codehaus.janino.SimpleCompiler.compileToClassLoader(SimpleCompiler.java) at org.codehaus.janino.SimpleCompiler.cook(SimpleCompiler.java) at org.codehaus.janino.Cookable.cook(Cookable.java) at org.codehaus.janino.Cookable.cook(Cookable.java) at org.codehaus.janino.Cookable.cook(Cookable.java) at com.albertattard.askme.server.DemoSwapAssessor.assess(DemoSwapAssessor.java:21) at com.albertattard.askme.server.AssessorServiceImpl.assessCode(AssessorServiceImpl.java:15) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_$3.run(Method_.java:149) at java.security.AccessController.doPrivileged(Native Method) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.privilegedInvoke(Method_.java:147) at com.google.apphosting.runtime.security.shared.intercept.java.lang.reflect.Method_.invoke(Method_.java:120) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527) ... 43 more The janino ByteArrayClassLoader is not working well (not accepted) on the app-engine :( Any other options? Cheers, Albert Attard Marie von Ebner-Eschenbach<http://www.brainyquote.com/quotes/authors/m/marie_von_ebnereschenbac.html> - "Even a stopped clock is right twice a day." 2009/8/14 Toby Reyelts <[email protected]> > > We don't have any near term plans to whitelist javax.tools. Do you think > something like janino <http://www.janino.net/> might work for you? > > > On Fri, Aug 14, 2009 at 2:50 AM, Albert Attard <[email protected]>wrote: > >> Hi everyone: >> >> Background about the problem: >> I'm a Java lecturer and would like to create an automated question >> web application similar to a multiple choice questions and answers but where >> the students can practice coding instead of simply selecting an answer. >> >> Multiple choice questions are very popular in web exams as these are fully >> automated. You do the test and the system corrects it for you and gives you >> the results there and then. I would like to go one step further and have the >> student to supply a code fragment or even a class(es) and have the system >> automatically correcting it in a similar fashion to the multiple choice >> questions. >> >> Example (in a nutshell): >> The student is asked to write a method: that given an array of int and two >> indices of type int (between 0 and the size of the array - 1), this method >> will swap the elements at the given indices. The student >> will write the method in the provided text area and submit it. Then the >> system will include this method into a class, compile it and by >> using reflection executes it with an array of values (similar to JUnit) to >> ensure that it is working as expected. During this process the system will >> be awarding the student marks and will display the final result together >> with comments as required. >> >> Google Appengine >> I have a prototype and it works great on Tomcat. Yes I know that it >> is subject to Java code injection but that's not an issue at this >> stage. This issue can be fixed at a later stage. Unfortunately I cannot >> implement it on the Google Appengine as most of the >> required functionality, such as writing to a file or JavaCompiler is >> disabled . I've managed to compile the classes to database (without writing >> to the file system) and load classes from database (without reading from the >> file system), which can integrate well with the provided datastore. >> Is there a way (or a procedure) of implementing such a system on >> the Google Appengine? This application will be a free education tool >> for everyone who would like to use it. >> >> Thanks in advance, >> Albert Attard >> >> Ted Turner <http://www.brainyquote.com/quotes/authors/t/ted_turner.html> - >> "Sports is like a war without the killing." >> >> >> > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~----------~----~----~----~------~----~------~--~---
