Exception in using objectify in GAE

Question

I am writing a GAE program which use objectify. I download objectify-4.0b1.jar form here and add modify WEB-INF/web.xml according to this. However, when I run my program, I got the following warnings. Another guy encoutered nearly the same problem as mine, but the solution may be different since I do use the latest jar file. It seems that com.googlecode.objectify.ObjectifyFilter can not be loaded. Anyone can tell me why?

EXCEPTION 
java.lang.ClassNotFoundException: com.googlecode.objectify.ObjectifyFilter
    at com.google.appengine.runtime.Request.process-0c7af5c4835ec917(Request.java)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:359)
    at org.mortbay.util.Loader.loadClass(Loader.java:91)
    at org.mortbay.util.Loader.loadClass(Loader.java:71)
    at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:73)
    at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:81)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:662)
    at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
    at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
    at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
    at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
    at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
    at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
    at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
    at java.lang.Thread.run(Thread.java:722)
W 2013-02-19 22:52:33.149
Failed startup of context com.google.apphosting.utils.jetty.RuntimeAppEngineWebAppContext@1687c76{/,/base/data/home/apps/s~zcbtest10/1.365432563369214216}
javax.servlet.UnavailableException: com.googlecode.objectify.ObjectifyFilter
    at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:79)
    at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:81)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:662)
    at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
    at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
    at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
    at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:219)
    at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:194)
    at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:134)
    at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:447)
    at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
    at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
    at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
    at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
    at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
    at java.lang.Thread.run(Thread.java:722)

I'm using the latest objectify with GAE 1.7.5 on eclipse.

The most obvious answer is that your objectify jar is not deployed to GAE along with other stuff — Peter Knego
@Peter How can I check whether or not the jar file has been deployed? If it isn't deployed, what I shall do? (The deployment is done by the plugin of eclipse.) — zcb

Romin Romin · Accepted Answer · 2013-02-20T08:57:52

Please copy the Objectify JAR file in the WEB-INF\lib folder of your project. This will make the Objectify classes available to the Web Container when it runs your application.

Exception in using objectify in GAE

1 Answers