I would like to use an ajax toolkit/framework like ZK (www.zkoss.org) or GWT. But I don't know whether it's possible to bundle resources in a JAR? Do you know which one support such resource loading?
Not sure what your goal is, but if its to bundle a web application into one file, then you can do that with a WAR file - assuming your deploying onto a java webcontainer like tomcat or jboss.
My goal is to summarize the Java-classes and also their Templates-files for the view of various application modules, each in one Java-Jar-File. These modules I use in another application, which of course I summarize in a WAR-File for Deployment. I would like to know which ajax-Framework/Toolkit does support this.
Take a look at http://www.ztemplates.org which is simple and easy to learn. This one allows you to put all related templates, javascript and css into one jar and use it transparently. Means you even have not to care about declaring the needed javascript in your page when using a provided component, as the framework does it for you.
Related
I like Dart, I have been playing with it for a while. I'd like to integrate with my Maven web app project based on Spring Boot.
I suppose the correct way is to use dart-maven-plugin. But I'm not sure how to properly glue it in place. Spring Boot has its own structure, Maven as well and Dart makes that none the better.
I will need probably the entry point for Dart part, means Spring Boot templates folder needs to include the html resources from Dart.
I would appreciate any idea, best practices.
PS: the aforementioned dart-maven-plugin is not really vivid, should I be afraid using it at all, as I don't see any progress there, compared to Dart itself.
UPDATE
So this can be solution(note I have only one so called "entry point"- .dart file so far)
normal Dart structure in src/main/dart
user dart-maven-plugin's pub build command into ${project.build.directory}/dart
maven-resources-plugin:copy-resources from ${project.build.directory}/dart/web to ${project.build.directory}/classes/public/
make war
I'm still able to use Intellij's Dart integration from src/main/dart.
The Spring Boot maps classes/public/ folder to / so the dart file and html files are loaded properly.
It's not ideal, but it works so far. Please fell free to write down any comments.
I have tried a few times to use dart in a maven project myself and always ran into some problems. Right now I'm developing my dart apps in a separate module that I build with pub which connects to the maven based java backends with rest.
This has several advantages for me, for example:
I can use pub and avoid problems with outdated maven plugins
I use the serving mechanism that fits best for the static dart code and assets (in my case a docker image with nginx)
I have a clean separation of backend and frontend code with a tailored REST API
As I like the microservice approach I also use spring session together with zuul (via spring-cloud).
If you want to combine dart with generated html from for example JSPs or another templating engine, then this isn't a good approach for you. But IMHO dart is not yet very well suited for these kind of architectures.
I am working on a large scale system using PrimeFaces 5.0, Java EE 7, Maven 3.0.5, Netbeans 7.4 & GlassFish 4.0
I want to implement it as (multiple WARs , multiple EJBs , one EAR).
Multiple wars could have common files like (JS, CSS, XHTML, Backbeans & Converters)
i have achieved this using jar which contains this resources.
different WAR files, shared resources
I need a session-scoped bean to be shared between different wars, I found this but i found it more than what i need.
http://docs.oracle.com/cd/E18686_01/coh.37/e18690/glassfish.htm#CEGBDHJB
so my questions is:
Is using a jar is the right approach to share what i want ??
where do i put jars like primefaces or omnifaces in the project where they use the same class loader ??
How can i share session-scoped between different wars ??
I have been working on a ear project with similar requirements as yours, according to our experience :
Sure. We have seperated our war projects and use them as extended controllers to carry out front end logic and passing data to view, and they make their service calls via a jar file called common-services.jar . Our whole service layer is living on a single jar file. However if you ask my personal opinion, I think it would have made a lot sense to create a third war file just for the services, and talk restful with all the front-end repos. That way service calls could be opened to third party users without any further work. So to sum it all up, yes it is an acceptable approach, but you should also consider packing it as war.
On a parent pom above all war, so all war files use the same version and it is managed from a single pom.
Carry all session based operations to your third jar / war we have discussed in question 1. Makes much more sense that way. Or I suppose you will need solutions like single sign on. But my first suggestion works like a charm for us.
Grails has amazing validation; is it possible to use it independent of the Grails framework?
We have a Java/Groovy Camel-based web application we can't convert to a Grails application. I'd love to use the Grails-style validation with the declarative constraints but have been unable to successfully configure the application to work with Grails libraries without converting the whole thing.
The validation provided by Grails is just a wrapper around Spring's bean validation framework. Since Grails is open source you can take a look at how it's done and adapt it to your own needs. The best place to start looking is the GrailsDomainClassValidator and DomainClassGrailsPlugin to get an idea of how it's done. Another point of interest would be the #Validateable AST annotation.
As far as I know, and from what I can see in the source, there isn't a stand alone way to do this outside of a Grails project without writing your own adaptation/implementation.
You can use a external validation without problem. It is possible, for example, using a external "jar" (that do a validation) file on the "lib" folder of your Grails project. Through this way, you can use the API of this jar file. It's a simple way that you can use.
I'm having a problem I simply can't get my head around.
I'm creating a jsf application where I (as administrator) can upload a jar file, and that way around update the application.
Through this tutorial: http://docs.oracle.com/javase/tutorial/deployment/jar/jarclassloader.html I have managed to classload the jar file. The first issue is that I can only class load as "Object" and not cast to an other class type. I get a ClassCastException.
JarClassLoader jcl=new JarClassLoader(url);
Class cl= jcl.retreiveClass(jcl.getMainClassName());
Object ob=cl.newInstance(); //I would like to make this a RouteBuilder object instead of Object
Concretely I'm using Apache Camel, where I can add routes to an existing "core" (CamelContext). What's happening is that I have the core of apache camel running in my web app, and I can then add routes runtime. It's a route I want to package as a jar and load into the app runtime (I want to develop and test the route in my local environment, and then afterwords upload it to the production application). A concrete route is just a simple java class that extends RouteBuilder. I want to upload the jar, classLoad (URLClassLoader) the main class (maybe the whole jar? - does that make sense?), and convert it to a RouteBuilder. This seems to be impossible. I have chosen to upload the jar file to a folder outside my war, so that the routes do not get erased when I restart the webapp (is this smart or should this be done in an other way?). Is that a problem regarding name spaces? Furthermore, I haven't been able to find out whether I need to traverse my entire jar file and classload ever single class inside. Any comments on that?
To me it seems like I have some fundamental misconceptions on how extending / updating a java application is done. I simply can't find any good examples/explanations on how to solve my problem and therefore I conclude that I don't get this on a conceptual level.
Could someone elaborate on how to extend a running jsf application (I guess the same issues are relevant in native java apps), explain how to upload and class load a jar at runtime, and how to cast loaded classes to other class types than Object?
Thanks
Lasse
If you are interested in loading Routes without stopping your application you could consider using an OSGi container like Karaf. Karaf provides support for Apache Camel routes out-of-the-box: http://camel.apache.org/karaf.html
All class loading is managed by the OSGi container and you just need to run some commands to update things. I am not sure if this could work with your JSF application but it worths to take a look.
I've got a Spring MVC application and I've decided that I'd like to try using GWT for the front end. I'd like to continue using MVC as I'll also be using Spring Security and some other springy stuff.
I'm aware of the GWT-SL project, and I guess I'll use it. The documentation is light on examples unfortunately.
What I'm wondering now is.... how do I reconfigure my project so that I can use GWT? I'm assuming that I'll lose the ability to run in hosted mode, and I suppose that's ok. Do I just add the GWT and GWT-SL jars, reconfigure my web.xml, and add a package to my project for the GWT code?
I'm using Eclipse 3.4. My existing project is standard web project.
With the new version of the GWT plugin, you'd have all the benefits of the hosted mode browser without having to modify any options. The GWTHandler from the GWT-SL will take care of your rpc call mapping. However, you will have a problem with your existing domain objects structure. You will either have to put them in GWT's 'client' package, or mirror your existing domain objects to enable them to be compiled to javascript. I have been looking for a stable non-invasive framework for doing this, but have yet to find one. Gilead looks promising, but you will have to extend its classes on your domain.
I have posted a view month ago my simple project (3 classes) how to integrate GWT with existing Spring MVC application. Simple sample also provided.
Try it, it is clear and simple: http://code.google.com/p/gspring.
You won't lose hosted mode. I don't know if you're using the internal server for that - I use -noserver so I can't help you there.
Other than that, I guess the documentation is quite clear. Have you hit any specific problems?