Whenever i compile my widgetset using the eclipse compilation tool (plugin) and maven install. The tomcat server cannot find this file even though it's placed right under my VAADIN/themes/widgetsets folder?
The error i get isnt very helpful:
Feb 20, 2012 7:20:47 PM com.vaadin.terminal.gwt.server.AbstractApplicationServlet serveStaticResourcesInVAADIN
INFO: Requested resource [VAADIN/widgetsets/org.bixin.dugsi.web.DugsiManagerWidgetset.gwt.xml/org.bixin.dugsi.web.DugsiManagerWidgetset.gwt.xml.nocache.js] not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder.
EDIT:
if anyone else noticed this, the file nocache.js is located in VAADIN/widgetsets/org.bixin.dugsi.web.DugsiManagerWidgetset but the server is looking in
VAADIN/widgetsets/org.bixin.dugsi.web.DugsiManagerWidgetset.gwt.xml/
it added .gwt.xml to file directory for some reason? how can i fix this
How can i refresh tomcat within eclipse?
Have you checked that the .gwt.xml postfix is not in your web.xml. It should be:
<init-param>
<description>Application widgetset</description>
<param-name>widgetset</param-name>
<param-value>org.bixin.dugsi.web.DugsiManagerWidgetset</param-value>
</init-param>
You can see detailed Vaadin compilation command on the first few lines of console output by enabling "verbose compilation output" on Properties -> Vaadin section. Your file may be located in wrong place other than specified in verbose compilation command.
Also, your related file may be located in a directory which has space characters. This may be an error for the compiler.
Error may be caused of another unrelated item too. Probably you can find the real cause by examining verbose compilation output.
Related
i had a problem running Internationalization code (GWT teck. on Eclipse) and had the following console result
Jul 16, 2014 9:45:11 AM java.util.prefs.WindowsPreferences <init>
WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
[WARN] Server class 'org.eclipse.jetty.servlet.listener.ELContextCleaner' could not be found in the web app, but was found on the system classpath
[WARN] Adding classpath entry 'file:/C:/Dev/eclipse-standard-kepler-SR2-win32-x86_64/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.6.0/gwt-2.6.0/gwt-dev.jar' to the web app classpath for this session
Searching online found out something about creating new key
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\JavaSoft\Prefs
if So then how to create this KEY??
and what exactly causes this problem??
These are WARN lines, so they shouldn't cause any compilation or runtime problem and your project should eventually compile and run.
It seems some code in your server wants to store something using the java.util.prefs api and it is failing because your preferences repository has some problems (maybe permissions, or it is full, etc) or the class using it is storing something wrong.
The GWT compiler, stores some info in your java preferences as well, but it does it in compile time, so if it failed you should see a different line, see CheckForUpdates class.
Other WARN lines in your logs are normal in dev-mode.
I downloaded gflot for my gwt project. To get to know the library I created a test project called "FlotDemo". I'm using Eclipse and created a plain vanilla gwt project with the help of the project creation wizard (the stuff with the greeting servlet and so on)
This is what I did:
Downloaded gflot-3.1.1.jar and copied it into /war/WEB-INF/lib
Added in Project->Properties->Java Build Path->Libraries gflot-jar to the path
Added <inherits name="ca.nanometrics.gflot.GFlot"/> to my "FlotDemo.gwt.xml"
Went to gFlot example and copy an pasted it to my EntryPoint class
So after step 4, eclipse strangly cannot resolve the objects from gflot I used in the code. I tried to run the web app anyway in the gwt simulator but it quit with the error message:
2013-06-05 17:24:51.212 java[12069:707] [Java CocoaComponent compatibility mode]: Enabled
2013-06-05 17:24:51.213 java[12069:707] [Java CocoaComponent compatibility mode]: Setting timeout for SWT to 0.100000
Loading modules
flotdemo.FlotDemo
Loading inherited module 'flotdemo.FlotDemo'
Loading inherited module 'ca.nanometrics.gflot.GFlot'
[ERROR] Unable to find 'ca/nanometrics/gflot/GFlot.gwt.xml' on your classpath; could be a typo, or maybe you forgot to include a classpath entry for source?
[ERROR] Line 11: Unexpected exception while processing element 'inherits'
com.google.gwt.core.ext.UnableToCompleteException: (see previous log entries)
at com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:308)
What am I doing wrong here?
<inherits name="ca.nanometrics.gflot.GFlot"/> is the old one.
Since 3.0, use <inherits name='com.googlecode.gflot.GFlot'/> instead.
See the example.
I'm having this exception with some stubs generateds by Axis2:
"The type org.apache.axiom.om.OMElement cannot be resolved. It is
indirectly referenced from required .class files"
I've been reading many posts, and trying to find a solution. What I've found so far is to add the apache tomcat 5.5 library to the build path. It removed the error in the java file, but then, when I to execute any java program inside the project, I got this error:
'Launching myApp' has encountered a problem Exception occurred
executing command line. Cannot run program "C:\Program
Files\Java\jdk1.5.0_22\bin\javaw.exe" (in directory
"D:\Digicel\workspace\Digicel\myClassSample"): CreateProcess error=87,
The parameter is incorrect
then if I remove the apache tomcat library from the build path, I can run the other java programs, but not the one mentioned initially.
Any thoughts about it?
Okay, I've found the cause of the problem with the help of a friend :)
The thing is that Eclipse is aware that one of my dependencies, depends of another library, and Eclipse is checking for it when it tries to build the code.
So, what I've done is try to check which jar file contains this library: " org.apache.axiom.om.OMElement".
I've googled it and found that it is "axiom-api-1.2.10.jar" and finally my file compiled with 0 errors.
He also explained to me that my original solution of adding the apache tomcat server library is adding all the jars that cames with apache tomcat (which is a big list), and probably there may have been a version conflict with my current list of added jars.
So, the fix was to find the appropriate jar and add it to the project.
This error can also occur when a indirect dependency has a corrupt jar file. This may be caused by problems at the public maven repository.
If this is the case removing the local maven repository to download fresh jar files will fix your problem:
rm -Rf ~/.m2/repository/{enter/path/to/broken/stuff}
Goto Maven >Update Maven project>checkmark the Force update >Then Run
..That error Will gone....
Trying to use Apache POI in a Eclipse JSP project. The POI jar is in the project's Java Resources Library list.
<%# page import="org.apache.poi.hssf.usermodel.HSSFSheet"%>
at run the following error occurs:
An error occurred at line: 7 in the
generated java file Only a type can be
imported.
org.apache.poi.hssf.usermodel.HSSFWorkbook
resolves to a package
Any ideas? Thanks
Don Lawton
The message indicates that the class could not be found on the classpath of your deployed application. Did you make sure that the POI jar is in your WEB-INF/lib folder?
Same happened to me, even when the needed jars were indeed in the WEB-INF folder.
I was using the provided server in SpringSource ToolSuite (STS). It took me several attempts to clean, republish, etc... before it finally worked.
I am just starting with GWT. I use Eclipse and have installed the GWT plugin.
I have followed the directions here Maven GWT 2.0 and Eclipse to set up a GWT project using the gwt-maven-plugin. When I run the Maven goals gwt:compile gwt:run, GWT Development Mode is launched and I can copy the url from it to my browser and view the label.
However, the project has this problem:
Description: The web.xml file does not exist
Resource: WEB-INF
Path: /GWTExample/war
Location: Unknown
Type: Google Web App Problem
If I try to run the project as a Google Web Application, I get this warning:
[WARN] No startup URLs supplied and no plausible ones found -- use -startupUrl
I can get rid of the problem by copying the web.xml to the war directory, but I still get the URL issue when running as a Google Web App.
If I'm using Maven and GWT in Eclipse, should I just ignore the web.xml problem and always run applications in development mode via the Maven goals? Or is there a way to set things so I can run as a Google Web App?
EDIT: Related to the above, is it possible to debug a GWT app running in development mode started by gwt:compile gwt:run? I have added breakpoints to my application but it doesn't stop on them. I'm not sure if it is something I've configured wrong or if it's just not possible.
Update:
In response to Prem's answer...
When I run a compile gwt:run, the web.xml file isn't copied. When I run the install gwt:run, I get this error:
[INFO] --- gwt-maven-plugin:1.2:test (default) # SampleGWT ---
[INFO] using GWT jars from project dependencies : 2.0.4
[INFO] establishing classpath list (scope = test)
[ERROR] java.lang.NoClassDefFoundError: org/codehaus/mojo/gwt/test/MavenTestRunner
[ERROR] Caused by: java.lang.ClassNotFoundException: org.codehaus.mojo.gwt.test.MavenTestRunner
[ERROR] at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
[ERROR] at java.security.AccessController.doPrivileged(Native Method)
[ERROR] at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
[ERROR] at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
[ERROR] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
[ERROR] at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
[ERROR] Could not find the main class: org.codehaus.mojo.gwt.test.MavenTestRunner. Program will exit.
[ERROR] Exception in thread "main"
I’m guessing that bug http://jira.codehaus.org/browse/MGWT-24 is included in version 1.2 of the gwt-maven-plugin. Normally I wouldn’t run install on a project that builds a war file, but I would expect to at least get past the test phase of the build cycle.
Does anybody have any idea why I would get this error on the install but not the compile goals? Also, should I be expecting either goal to copy the web.xml file from src/main/webapp/WEB-INF/web.xml to the /war directory?
Description: The web.xml file does not exist
gwt-maven-plugin creates a project with 'war' packaging format (it's a web app so no surpirse here). Web.xml for this project will be under 'src/main/webapp' folder which will be copied to the 'war' directory (which is set as the output directory) as part of the 'resources' phase in the maven build life-cycle. You should always use
mvn compile gwt:run
or
mvn install gwt:run
so that resources are copied, all java files are compiled and gwt:compile is also invoked (since it is bound to the 'compile' phase automatically)
[WARN] No startup URLs supplied and no plausible ones found -- use -startupUrl
As per the stackoverflow link you used as reference, only your maven build file is setup with startupUrl. In order for it to work in Eclipse, you must edit the Run Configuration of your project and add the '-statupUrl' command line arguments to the existing arguments in the "Arguments" panel.
However, this is just a warning and it should not stop you from running your GWT application from eclipse. If you are facing the same "web.xml" problem here as well, it could be because you did not compile your project in your IDE before invoking "Run as Web Application". I suggest you to disable "Build Automatically" option for this project and always build it manually and invoke "GWT Compile" and then try "Run as web application"
EDIT: Related to the above, is it possible to debug a GWT app running in development mode started by gwt:compile gwt:run?
In general you must use "Remote Application" debug configuration for remote debugging a process. However I am not sure if it will work for GWT projects.
I got me too this warning:
No startup URLs supplied and no plausible ones found
when I have followed this gwt tutorial
In that screenshot there is no checkbox with "Generate sample code" . In my IDE ( sdk 2.5) it is, so I have unchecked...
It wasn't created any of the server and client packages, I have created the client manually, as the tutorial required. The tutorial until that step doesn't say I must have a server package too. That and his configuration is missing from project.
If you right-click on your project and go to Properties -> Google -> Web Application, your WAR directory might be something like either war or src/main/webapp/WEB-INF/classes.
Change that to src/main/webapp.
Also un-check the box next to "Launch and delploy from this directory..."
That's what fixed this problem for me. It also fixed the "can't find gwt-servlet.jar" problem at the same time.