Develop Reference

Camunda Cockpit doesn't start

I am using Windows 10, jdk 1.8.0, Eclipse Neon 3.0, wildfly 10 downloaded from camunda website, which includes Camunda BPM as part of WildFly 10.
My porblem: Camunda cockpit doesn't start in browser and gives 404 error! I'd like to know how to start make it appear. I was using Tomcat server and it worked, but now that I am using wildfly the cockpit doesn't start.
What I have done is as follows:
I have designed a BPMN model. Then by following the instruction in the following link:
https://docs.camunda.org/get-started/javaee6/
I have saved my BPMN model in src>main>resources, made the java classes in a maven project, add dependencies to pom.xml. Successfully built the project. Right click on the pom.xml, run as maven clean, run as maven isntall. After .war file is created in target folder copy it in camunda-bpm-wildfly10-7.7.0 > server > wildfly-10.1.0.Final > standalone > deployments, run start-camunda.bat. At this moment a page in browser opens with "404 - Not Found" error.
The cannot send the error I am getting at cmd.exe-standalone.bat because stackoverflow detects links in it and I can't use more than 2 links, but I can see my deployed file (myFile.war.deployed) in deployments!
I appreciate appreciate your help.
.5 (Final)

vaadin4spring security sample: failed to load widgetset

I am desperately trying to build a little Vaadin project with login secured pages/views. I have found vaadin4spring and thought I could start based on the security sample. However, after importing the project and running it, I am receiving the message (without any changes at the project):
Failed to load the widgetset:
./VAADIN/widgetsets/org.vaadin.spring.samples.security.Widgetset/org.vaadin.spring.samples.security.Widgetset.nocache.js?1424243461387
I have also tried to compile the widgetset manually, which wasn’t possible at the beginning (missing WebContent folder). After converting the project to use WebFacets and adding Dynamic Web Module the compilation was possible. But the widgetset related error message was still the same.
Can anybody help me with this problem? I have the feeling that it is just a little thing I am missing.

I think you have imported the sample somehow wrong, because you are talking about WebContent folder. I bet you are using eclipse (because of WTP related WebContent folder).
Delete the old project from workspace and possible settings files eclipse created
Choose File->Import->Maven->Existing Maven Project
You probably want to make one fresh install before you start to play with the project: from the top level "parent-pom" project, choose with right click: Run as -> Maven install. Get a cup of coffee, the build will take a while.
Enjoy!
To start e.g. the Security sample you seem to have tried, just execute the main method from org.vaadin.spring.samples.security.ApplicationInitializer. In eclipse, right click on the class and choose Run as Java Application and the app will launch with embedded Tomcat at http://localhost:8080/

Why won't basic spring 4 sample run with Eclipse kepler?

I am using the sample project code here that i've downloaded from the following:
http://javahash.com/spring-4-mvc-hello-world-tutorial-full-example/
Direct link here:
http://javahash.com/wp-content/uploads/2014/02/Spring4MVCHelloWorld.zip
I have Eclipse Kepler SR2 (J2EE), Tomcat 7 64-bit, Java 7.
The project does not appear to be a web project, so I add "Dynamic Web Module" version 3.0 and "Java" (version 1.7) to it. I right click, maven install, which appears to run fine. When I try to actually deploy it on tomcat, it does not give any errors in the console, but when the browser window pops up it shows a 404
http://localhost:8080/Spring4MVCHelloWorld/
HTTP Status 404 - /Spring4MVCHelloWorld/
--------------------------------------------------------------------------------
type Status report
message /Spring4MVCHelloWorld/
description The requested resource is not available.
--------------------------------------------------------------------------------
Apache Tomcat/6.0.39
That said, how do I get this "basic" example running in eclipse? Anyone able to get this working successfully? It feels like it should be more trivial than the 5 hours I've spent on trying to get this sample code working to no avail.
UPDATE:
Still continues to fail despite using Tomcat 7.0 server.
Download the sample, extract contents to workspace directory.
"Import Existing Project" in Eclipse
Since there is no "Run On Server" option, I right click on the imported project directory and hit "Properties".
I go to "Project Facets" and check 2 things: "Dynamic Web Module" (3.0) and "Java" (1.7) and hit apply then "Ok".
I right click on the project Spring4MVCHelloWorld and click "Maven"->"Update Project". Then I click "Run On Server".
There are no errors in the console, but the web browser that pops up in eclipse shows a HTTP STATUS 404.
I tried going to:
http://localhost:8080/Spring4MVCHelloWord/hello
and the same:
HTTP Status 404 - /Spring4MVCHelloWorld/hello
shows up, but the tomcat shows up as:
Apache Tomcat/7.0.53
Note that this is the 64-bit version. What steps am I missing? How do I get around this silent failing?

Apart from what Dimitri stated, your log seems to indicate that you are using
Apache Tomcat/6.0.39
That version of Tomcat does not support ServletContainerInitializer which your Spring web application depends on for configuration. Upgrade to a Tomcat version 7+.
It seems like the Maven update doesn't work for you (or for me).
First, go into Properties -> Deployment Assembly. You need to get rid of Web Content if it's there and add src/main/webapp (which is a maven convention). You also need to add the Maven Dependencies as shown below.
Finally, and this might not be necessary, delete the web.xml provided to you and re-create it by selecting and right clicking Deployment Descriptor in the Project Explorer and clicking Generate Deployment Descriptor Stub.
Also, make sure your Java Build Path in the Properties has a Java 7+ version of the JRE.

As far as I can see your controller only maps to /hello, which means your URL should be:
http://localhost:8080/Spring4MVCHelloWorld/hello
Another thing that might be interesting to you is that if your having problems with certain project facets (like Dynamic Web Module) not being recognized, you can usually fix them by righ clicking your project, opening the Maven menu and choosing Update Project.

Creating and debugging app with springmvc and eclipse with internal server

I currently have a sprimgmvc app that uses maven. I am currently using mvn:package to build war and deploy it to tomcat to develop and this is getting very cumbersome. I dont have the eclipse configured to automatically build and deploy to tomcat for that matter?
Can anyone please provide me steps that I need to take so that if I make any changes in my project I can just hit save and run and it will deploy to the tomcat OR a way in which I dont use tomcat but use maybe jetty or something else to build and test my app?
Thank you

download STS > Import your project as maven project to the new workspace > mvn install (only once to download all your dependencies) > run AS > Server > baam!
For any other eclipse version pretty much the same but you need to open the server window and configure tomcat , basically open the server tab > new > select your tomcat installation path and then .. just run it on the server. You can even modify code while running your app.

I was able to make this work using some helpers from: Running Tomcat from within Eclipse always gives me 404 (but index.html works) and following these steps:
I suspected that there was something wrong with the initial set up in eclipse. So, I closed the project in eclipse using: Right Click project > Close Project
Then I deleted any files related with eclipse from the folder. These were: .settings, .project, .classpath
I then Re-imported the project as maven project.
I used Window > Show view > server view
In the server view I created a new server and pointed it to XAMPP > tomcat since I already had tomcat.
Right click on the project > Run As > Run on Server.
It should run properly at that point in the browser as well
Make sure to check Right Click Project > Properties > Deployment Assembly - There should be Maven Dependencies added to the project and the deploy path for that should be "WEB-INF/lib"

here is a my way to debug and run maven web project with eclipse. though code is not hot deployed but it works fine for me.
Steps are as follows
open command prompt and go to your project directory. Lets say it is /opt/myhome/myproj
run mvnDebug tomcat:run command, make sure you have mvn and mvnDebug at system path
A message will be appeared like one mentioned in screenshot attached below, this states that maven is waiting for remote connection.
Now we need to Remotely connect to maven from IDE. To do that
Right click on the project and select "DebugAs" ---> "Debug configuration"
Add an new entry under Remote Java application with highlighted details and then select Debug button.
switch back to your terminal and you will get a screen like one displayed below
your web app is ready to debug, put a break point and call it and your IDE will switch to debug perspective
We are done with it. now if you make some changes in your code. you need to stop it from terminal with Ctrl-C and re-execute mvnDebug tomcat:run and then Remote Debug from IDE.
As i mentioned in starting code is not hot deployable as in local debug mode but it is pretty much better approach than rebuilding war and deploy it to external tomcat instance.
I hope this targets your query

How to deploy portlets to Liferay?

I have faced problems in trying to install new portlets to Liferay running on Glassfish domain. I figured out the flow very lately and want to share it with others also. So, please read the answer and hope this helps someone :)
(Pre requisites for the problem is that I knew that adding projects running on Glassfish is done with a autodeploy folder, but making them visible on Liferay was another story.)

So, you make first a .war file let's say a portlet of name your_file.war. You wanna have it running on a glassfish domain under Liferay portal.
Steps to success:
1) Navigate to Control Panel -> Plugins Installation on Liferay
2) hit Install new portlets
3) hit Configuration
4) Fill in to Deploy Directory a new place for deployment let's say [your domain]/autodeploy2
5) Check that in the next line target is [your domain]/autodeploy (it is the Glassfish default deployment directory)
6) hit save
Now deployment will be done by copy pasting files to that new directory [your domain]/autodeploy2. The rest of it is handled automatically. Setting takes action imediatedly.
Done with deployment: Make a victory jig and enjoy :)
..you stop dancing and face a bug. You want a new revision to be deployed.. In this case, continue reading.
So, you have built your war again and want to re-deploy. Do the following:
1) undeploy old stuff from (your domain)/autodeploy folder by deleting the war file. Don't delete any other file.
2) result is that your_file.war_UnDeployed file will appear.
3) deploy new file by copying the newly built war in (your domain)/autodeploy2 folder.
4) result is that your_file.war_deployed will appear in (your domain)/autodeploy folder.
Make a dance again :)

There is several methods to deploy plugins (portlets, hooks, filters...) into your Liferay Portal.
If you're using Administration you can do it as Mico descripted. but if you're using Maven, Gradle, Ant, Ivi... you can configure their deployment descriptors and redirect their outputs (that are the wars) to the hotdeploy server folder (If you're using Tomcat, JBoss, Glassfish...).
This approach is quite better because you can create backup webapp folder and restore it whenever you want easily.

Below are not for Glassfish but common startup steps:
To install a portlet in lliferay portal
• first install liferay portal from below link
http://www.liferay.com/en_GB/community/wiki//wiki/Main/Liferay+IDE+Getting+Started+Tutorial
this requires installation of
liferay ide
liferay portal bundled with tomcat
add this tomcat as run server time and start it, it will start liferay portal
• create a portlet application
• open liferay at localhost:8080 and goto Admin -> control panel
• goto Plugins Configuration
• goto Intall tab and give location of war file (some logging error might come
at tomcat console, ignore it)
• again goto home page at localhost:8080 and click + button
• go at the bottom in the list and u will find ur portlet
• click add button present at the right side of it and ur portlet would be added to the page.
Modifying code of portel requires to uninstall and install again the portlet from war file.
All existing added portlets would also be modified.