how can I start a HttpServlet in an Eclipse GWT project?

[Ken Yap]

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

[Ken Yap]

Never mind, it was a silly typo of mine, I transposed the org and au
in the web.xml file. ClassNotFound meant exactly that. Sometimes it
pays to go to bed when tired and look at it with fresh eyes in the
morning.

It really does work to write a class to extend HttpServlet to handle
parts of the URL space for use in development, and also production if
you wish.