Ken Yap
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to Google Web Toolkit
I'm using GWT 2.0 with Eclipse Galileo (3.5). Currently the project
works fine, but it's all client side interaction at the moment.
I want to use HTTP as the data transfer method, because that's what
will be used in production, together with JSON. I want a HttpServet
for testing in my Eclipse project because of Single Origin Policy.
Basically I took the Greeting example and replaced the
GreetingServiceImpl servlet with mine that extends HttpServlet. I
edited the names in web.xml.
However when I debug as a web app Jetty cannot find my servlet class:
ClassNotFoundException. I have checked the my Servlet is compiled into
a class file in war/WEB-INF/blah/blah/... The classpath has not been
changed.
How can I get Jetty to load my servlet? Something about needing to
provide a log destination?
Here are the console messages when I debug as web app:
WARNING: EXCEPTION
java.lang.ClassNotFoundException:
org.au.george.nice.server.HistoryServlet
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
at
com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:
151)
at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
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.ServletHolder.doStart(ServletHolder.java:
242)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:
685)
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
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:
185)
at
com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:
146)
at
com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:
222)
at
com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:
86)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:421)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1035)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:783)
at com.google.gwt.dev.DevMode.main(DevMode.java:275)
Jun 23, 2010 2:51:09 PM
com.google.appengine.tools.development.ApiProxyLocalImpl log
SEVERE: [1277304669131000] javax.servlet.ServletContext log:
unavailable
javax.servlet.UnavailableException:
org.au.george.nice.server.HistoryServlet
at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:79)
at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:
242)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:
685)
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
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:
185)
at
com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:
146)
at
com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:
222)
at
com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:
86)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:421)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1035)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:783)
at com.google.gwt.dev.DevMode.main(DevMode.java:275)
Jun 23, 2010 2:51:09 PM com.google.apphosting.utils.jetty.JettyLogger
warn
WARNING: failed historyServlet: java.lang.NullPointerException
Jun 23, 2010 2:51:09 PM com.google.apphosting.utils.jetty.JettyLogger
warn
WARNING: Failed startup of context
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext@25861086{/,/
home/ken/workspace/NICE/war}
java.lang.NullPointerException
at java.lang.Class.isAssignableFrom(Native Method)
at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:
256)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:
685)
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
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:
185)
at
com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:
146)
at
com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:
222)
at
com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:
86)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:421)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1035)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:783)
at com.google.gwt.dev.DevMode.main(DevMode.java:275)
Jun 23, 2010 2:51:09 PM
com.google.appengine.tools.development.DevAppServerImpl start