I installed Eclipse Luna in XP yesterday and opened the sample project "Mutlipage Editor". When I click "Run" all that happens is another copy of Eclipse opens looking like the first copy but all the workspace boxes are empty.
I guess I was expecting either an emulator to start or the ability to run it on my Android phone. Can anyone get me started please?
When you run an Eclipse plugin it has to run in an instance of Eclipse so that all the other plugins that the plugin depends on are available.
The default 'Multipage Editor' is associated with a file type (.mpe I think). So create a file with that type and open it to see the editor.
You can also write an Eclipse Rich Client Program (RCP) where you can select the available plugins and the look of the UI, but this requires additional code.
I am having problems when editing template-files(HTML-files) in my Maven-project. I have made the Maven-project an Eclipse-project with the command "mvn eclipse:eclipse" (if it matters). I am using the Apache Velocity Engine as template engine for this project.
The problem arises when I'm editing the files in Sublime, and then save the file and refresh the browser. The changes does not show! If I however open the template file in Eclipse, just open it, I can even just open and close it right away, and THEN refresh the browser, the changes will show.
I have done a test to see if this problem occurs on other simple projects as well, and with a single HTML-file and a simple http-server, the work I save in Sublime shows as normal.
Does anybody know what is happening here? Am I bound to keep on using Eclipse as a HTML-editor? :( Does the Eclipse project files prevent me from using other editors? Why are the changes only showing when I open the files in Eclipse?
Any help is greatly appreciated!
In order for the changes to take place you have to right-click the file in Eclipse explorer tab and choose "refresh" in order for the (static) changes to be reloaded to Apache. For dynamic changes you'll need to restart apache or use a plugin such as JRebel.
Eclipse copies the files to the "target"-folder in the webapp. Sublime(and others) does not do this automatically, so you need to do this manually, or by a plug-in that will copy the files on save.
I have the source code for the VersionOne plugin. I am wanting to modify the code because I am getting a NullPointerException when I click a specific button on the plugin which crashes eclipse. I was wondering what steps I need to take in eclipse to import the source code, modify it, and get it to run. I have read over how to create a new plugin project, but I have never tried importing a plugin before. Plugin Source
Once you have imported the project and that seems to work fine, just run it like any other plugin.
I.e:
Set the breakpoints you want in the code
Click the "Run as..."
In the run dialog start up a new Eclipse instance
On the tab "plugins" make sure your imported plugin is selected
If you are using the plugin at the same time, make sure that the non-workspace is not selected
In the new Eclipse instance, set up a situation that will provoke the bug
You need the following things to do that:
From Eclipse download a distro with PDE (Plugin Development) included.
The source pages
Some configuration management tool like Git or Subversion.
You do then the following steps:
Unzip your sources locally somewhere and add them to the CM system.
Create an eclipse plugin project from that source location (depending on Git or SVN different steps).
Create a run configuration for Eclipse that includes that plugin. That is similar to creating a run configuration for Java, but your Java application is then eclipse (see the Help on Eclipse Application Launcher). You have to ensure that in the "Plug-ins Tab", your new plugin is included. After you have started it, you should see the new feature implemented in the new running eclipse. To debug it, you just have to press the debug button instead of the run button. You may then add breakpoints to the source code of your plugin to see how it is working.
You are then able to start a new eclipse application which includes the plugin and make your tests there. You are able to set breakpoints, debug the code and so on. If you find the error, you can change the code, test it, and as a result have a difference to the source you had initially. The best would be then to make a patch and send it back to the originator.
To deploy it then to others is a different story, and is well documented.
On my Mac computer, I follow the tutorial on this page to get the Taipan example run, but still failed so many times.
Switch to the Plug-in Development perspective and open the models folder within the org.eclipse.gmf.examples.taipan project. Explore each of the models found hereand their element properties. You'll notice that there are full and RCP versions of the generated Taipan examples to explore.
When I try to run as "Eclipse application", it launches a new eclipse app but the dialog box Examples does not have the 'Taipan Diagram' as it says:
create an empty project and a new 'TaiPan Diagram' found in the Examples folder of the New dialog
What are the possible causes? Someone helps me to solve it out?
I'm assuming that your plugin is working fine and doesnt show compilation errors?
Then the most likely reason is that you havent chosen your plugin to be active in your launch dialog.
I answered a similar question with this:
My guess is that you have just created the plugin, but aren't running it in your current Eclipse instance. That can be verified by opening the view "Plugin registry". That will show a list of all plugins, see if the plugin you have created is in that list.
If you click on the run button in Eclipse you will open a run configuration dialog. In one of the tabs, you get to choose what plugins should be available. Make sure your plug-in is selected. This will start up a new Eclipse instance that will run your plugin.
To make your plugin be a part of your ordinary Eclipse installation, you will need to export it to a jar and copy that jar to the dropins catalog.
What is the straight-forward way of importing one of the GWT samples in eclipse Helios + GWT 2.1.1. It seems like the content of the zip file doesn't contain any project files for eclipse.
I tried the following:
create a GWT project 'bla'
Delete the src ad war folder and
replace it with the src and war
folder from the sample
refresh the project in eclipse
hit 'run'
[ERROR] Unable to find
'bla/bla.gwt.xml' on
your classpath; could be a typo, or
maybe you forgot to include a
classpath entry for source?
So I go to the run configuration and remove the path for the example projects from the arguments list. I also changed the name of hosted html page to the one in the sample. Hit 'run' and:
[ERROR] Invalid version number "2.0"
passed to external.gwtOnLoad(),
expected "2.1"; your hosted mode
bootstrap file may be out of date;
Now I need an out of date version of GWT to run these samples? What is going on, I just want to look at a sample to learn a new concept.
Reading the readme.txt in the GWT samples directory I came across a solution that works on Eclipse 3.7. Assuming you have ant installed on your machine, execute the following from the sample's directory:
ant eclipse.generate
This will generate both the .classpath and .project files needed to import the sample into Eclipse and run it.
Here the relevant excerpt from README.txt:
-- Option A: Import your project into Eclipse (recommended) --
If you use Eclipse, you can simply import the generated project into
Eclipse. We've tested against Eclipse 3.4 and 3.5. Later versions
will likely also work, earlier versions may not.
If the directory containing this file does not have a .classpath or
.project file, generate them by running 'ant eclipse.generate'
In Eclipse, go to the File menu and choose:
File -> Import... -> Existing Projects into Workspace
Browse to the directory containing this file, select "Mail".
Be sure to uncheck "Copy projects into workspace" if it is checked.
Click Finish. You can now browse the project in Eclipse.
To launch your web app in GWT development mode, go to the Run menu and
choose:
Run -> Open Debug Dialog...
Under Java Application, you should find a launch configuration
named "Mail". Select and click "Debug".
You can now use the built-in debugger to debug your web app in
development mode.
In eclipse 3.7, instead of Run -> Open Debug Dialog..., its Run -> Debug Configurations. I got both the showcase and mail samples running following those commands. Should work for all of the other samples as well.
The examples that come with GWT SDK were built in different ways. Some are Maven builds, others use Ant. Eclipse can handle these common builds directly, but you have to choose the right option.
So, if you want to open the Expenses project in eclipse, you would look in the projects root directory (i.e. ../gwt2.4/samples/Expenses) where you'll find a file called pom.xml. That is a Maven build file. To import it into your Work space select:
File->Import...
Open Maven->Existing Maven Projects, and click on Next > button
Browse your file system til you reach the Expenses folder. Click on it and Select OK.
At this point it will show you the Projects in that directory in the Projects: area of the window...only one in this case: /pom.xml com.google.gwt.sample.expenses:...etc.
click on the checkbox for that project, Next>
Finally, it ask you to map plugins. You'll need to select in the drop down menu under Actions the required plugins (such as m2e).
In other project folders you may find a build.xml file instead. That's an Ant build file. To import that you do something similar, but different (of course!):
File->New->Project...
Open the Java folder and select "Java Project from Existing Ant Buildfile", Next >
Click the Browse button, dig through your directory to the project folder and select the build.xml file, and Open it.
Project name should fill in automatically, just select the declaration to use in the middle window and click Finish.
Since those tutorial only include the src and war directory, the idea remains to:
create a new project following this tutorial
remove any created class part of the example files which are automatically added (see Issue 1547)
Unfortunately the Google Plugin does not allow to created a new Web Application Project without creating template files. The template files are nice for the first try but annoying if you want to start from scratch with a new GWT application.
copy the src and war directory in place within the now empty project
Following your ticket 5847 (No easy and straight-forward way to make examples work in eclipse),
as xo4yhamope comments, you need the right GWT option.
and did you consider the Issue 5038 about the error message:
Unable to find 'xxxx.gwt.xml' on your classpath;
could be a typo, or maybe you forgot to include a classpath entry for source?
This message usually means you attempted to refresh the browser before dev mode has had a chance to finish loading the module.
The uppercase/lowercase confusion happens because the module has been renamed to 'stockwatcher', but dev mode cannot map 'stockwatcher' to "StockWatcher' until it has finished loading the entire module.
So, it's just a matter of waiting a few seconds longer after the Development Mode pane says I should go to http://127.0.0.1:8888/StockWatcher.html?gwt.codesvr=127.0.0.1:9997 ?
That seems a little messed up. It should wait until it's actually ready before telling me it's ok, because users (like me) are going to go there as soon as the UI says it's ready.
The other confusing part is that the server begins serving the host page as soon as that message in the UI comes up. Because this was happening, I assumed that the server was completely up, even though (as it turns out) it wasn't.
Anyway, waiting a few more seconds seems to resolve the "Unable to find 'stockwatcher.gwt.xml' on your classpath" problem. Thanks!
I'm beginning to suspect this is a bug in the samples. I am adding this answer so it can be marked as an answer when I get confirmation about that.
I was trying out some other samples and came across this page. At the top is a little explanation for how to download and import the sample.
Before you begin
The StockWatcher project
This tutorial builds on the GWT
concepts and the StockWatcher
application created in the Build a
Sample GWT Application tutorial.
If you have not completed the Build a
Sample GWT Application tutorial and
are familiar with basic GWT concepts,
you can import the StockWatcher
project as coded to this point.
Download the StockWatcher project.
Unzip the file.
Import the project into Eclipse
From the File menu, select the Import... menu option.
Select the import source General > Existing Projects into
Workspace. Click the Next button.
For the root directory, browse to and select the StockWatcher
directory (from the unzipped file).
Click the Finish button.
If you are using ant, edit the
gwt.sdk property in
StockWatcher/build.xml to point to
where you unzipped GWT.
Now this is what I call straight-forward and easy.
At that point I had already built the StockWatcher in a previous tutorial but I got intrigued by the fact that it was explained exactly as I tried it the first time. So I downloaded the project and it had the correct eclipse project structure. I tried to import it 'et voila' I have the project in eclipse. I runs out of the box (with warnings). That is how expected the samples to be.
This experience leads me into thinking that the sample projects are malformed (as eclipse projects) and need to be updated. Let's hope my issue report leads to results.
-- Option A: Import your project into Eclipse (recommended) --
If you use Eclipse, you can simply import the generated project into Eclipse.
We've tested against Eclipse 3.4 and 3.5. Later versions will likely also
work, earlier versions may not.
If the directory containing this file does not have a .classpath or .project
file, generate them by running 'ant eclipse.generate'
In Eclipse, go to the File menu and choose:
File -> Import... -> Existing Projects into Workspace
Browse to the directory containing this file,
select "Mail".
Be sure to uncheck "Copy projects into workspace" if it is checked.
Click Finish.
You can now browse the project in Eclipse.
Copy from readme.txt supplied by samples. I tried this method, it's OK.
To import GWT showcase(2.5.1) I did following steps:
Create a new Google Web Application Project
New –> Other –> Google –> Web Application Project
Provide the project name “Showcase” and the Package name is com.google.gwt.sample.showcase
Click Finish
Go to eclipse plugin folder and traverse to the gwt
Under that folder go to gwt-2.3.\samples\Showcase
Copy (Ctrl C) all the contents. The contents are
a. src
b. test
c. war
d. build.xml
e. README.txt
In the eclipse, right click on the Showcase project and paste. Overwrite all the files
The files should start copying without any problem
Right click on the Showcase and Run As “Web Application”
You should have your Showcase working like Gem!
For me it worked like a charm ;)
Ref : http://simplestepswebdev.wordpress.com/2011/05/16/import-gwt-samples-into-eclipse/