I want to deploy an application with a web interface. I want to use Spring YARN for this because that eases all the basic setup, and I can start the application with java -jar.
What steps do I have to do to:
have my application expose a web interface
have the tracking URI I get when submitting it proxy to that web interface
Unfortunately, I cannot find anything about this on the net, there is npthing on that particular issue in the Spring documentation and Google searches do not get me the correct results either.
Easiest way to do this is simply use Spring YARN Boot application model and framework is then trying to do the heavy lifting on your behalf. I actually showed a demo of this during my session at SpringOne 2GX 2014. You can find my session recording from youtube https://www.youtube.com/watch?v=qlvX7_r9aUA.
Interesting stuff for this particular feature is at the end (starting from 1:16:22) and you can see how web server address is registered into YARN resource manager and how I query it using a Spring YARN Boot CLI (around 1:32:13). Spring YARN will actually see that there is an embedded servlet context and registers it automatically. In this demo property "server.port=0" makes tomcat to choose random port which is then registered.
Code for this particular UI demo can be found from github https://github.com/SpringOne2GX-2014/JanneValkealahti-SpringYarn/tree/master/gs-yarn-rabbit. Demo was around RabbitMQ just to have some real UI functionality and not just a dummy hello world page.
There's also more up-to-date sample in https://github.com/spring-projects/spring-hadoop-samples/tree/master/boot/yarn-store-groups which doesn't have a real UI(just Boot management endpoints). Thought it's relatively easy to add Spring MVC magic there just by following normal Boot functionality(i.e. following https://spring.io/guides/gs/rest-service).
Lemmy know if this helps!
Related
I am working on a spring boot application.
I wanted to know what happens when the application started running and before it becomes ready for user interaction.
I tried going through the console logs but I am still unsure as to what happens when.
I believe you should elaborate a bit more your question. That's because you can build different types of applications using Spring Boot. In a nutshell, during the start up the application will basically try to load the "beans" defined in the related context(s), pre-configured components, define the active profile, properties files, etc. Also some Spring and application events are generated during the start up.
A good way to understand what's going on behind the scenes is running the application in DEBUG mode. By default, the log level of the application is set as INFO.
Have a look at this link for further details:
http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#boot-features-spring-application
I hope this can help you as start point.
I would like to set up a standalone swagger-ui application, to view the different APIs from different servers in one central place.
In a second step I would like to customise swagger-ui to show multiple APIs at once.
I don't want to add swagger-ui to all the servers that provide swagger api-docs though.
To do so I would like to use spring boot and thought this should be an easy task. However, I have trouble getting it to work.
Here is what I did:
Generated a Spring Boot application using https://start.spring.io
included spring-boot-starter-web
added io.springfox:springfox-swagger-ui:2.3.1 dependency
When opening http://localhost:8080/swagger-ui.html I see a 404 error and UI seems broken:
Is there any reason for using Spring-boot instead of a simple web server for this?
See for example here with Nginx, including some basic authentication (pretty old link but still looking alright), or in the ReadMe of the swagger-ui github reposiory directly for easily serving with Connect/gulp-serve inside Docker (the setup can also be reproduced directly without Docker if wanted).
Also I have no idea why you're getting resources requested by the page on a different port... Just ask in case you still need help now on this topic.
Is there a Spring Integration endpoint which connects to Gigaspaces?
As a general point, I am also interested to know what is the best documentation for using Spring together with Gigaspaces. Am surprised that there does not appear to be a lot of material written on this. Is Gigaspaces still the preferred option for scaling Spring applications, or are there better solutions?
GigaSpaces XAP using Spring as its native configuration. XAP container running Spring container internally.
Every XAP component (data grid node , data grid proxy , event handler ....) exposed via Spring. IDE integration and Unit tests done via Spring application context.
You can deploy spring app as is into XAP. XAP will scale it and make it HA.
See more:
http://docs.gigaspaces.com/xap102tut/spring-integration.html
http://docs.gigaspaces.com/sbp/spring-data.html
Is the question is "How my application based on spring-integration can easily push objects into GigaSpaces XAP?" or "How can I use the spring-integration framework from my code deployed in GigaSpaces XAP (so collocated with the data)?"
For the first question, I am unaware of any off-the-shelf end-points. But it is very easy to program: you will have to decorate your pojo (by annotation for example, to say where are indexes etc.)
You can use JMS integration (use GS XAP as a JMS broker), but I don't think it is the best way here...
For the second question, a GigaSpaces XAP application is mainly a Spring context. By default, there is no use of Spring integration, but it is very very easy to integrate as we have already in a Spring stack.
I have been searching for an example Spring Webservice which is being protected using oauth 2.0..
Looking around I found https://github.com/spring-projects/spring-security-oauth/tree/master/samples/oauth2 but there some files seems to be missing from the project.
Two things that I am looking for is :
When user authenticates, user name and password goes to /login.do , now I can not understand how this Servlet is being configured, if its not controller. web.xml is missing.
When I try to see how beans configured then applicationContext.xml is also missing. I am not able to find those files in order to see how things are configured.
Help Required :
Should I use annotation in order to configure my web service or xml configuration. I am willing to use the latest version, and leverage advanced configurations, for better security.
I have another Single page application ( HTML5 ) , which accesses data from this spring web service, which is being hosted on Google App Engine. My ultimate objective is to create a chrome plugin of (html5) pages and use my service from there..
Please suggest a better path so that I can achieve my objectives.
Best regards,
Shashank Pratap
Apologize for late reply.
1) Regarding Oauth2.0 implementation : Since GAE does not support Servlet 3.0 therefore, developer is restricted to servlet 2.5. Therefore I found that we are restricted to 1.0.5.RELEASE. I was able to configure it successfully.
Best Practice on GAE : Rather than following this approach, I would suggest others to use Google Endpoints. As it supports oauth2.0 as well as we can develop REST API relatively quickly.
Scale ability and Response time : Since I was using Spring dependency injection along with spring security, application responded slower than the combination of Google Endpoints and Google Juice, as juice does injection just in time, where as spring prepares everything as soon as new instance starts, which created problem for me.
2) Chrome Plugin is completely different story. :-)
Please correct if I am wrong.
Thanks,
Shashank Pratap
My application uses Spring Security and Spring MVC and is hosted on Glassfish 3.1.2.
I'm looking for a forum software (phpBB like) that I can integrate easily in my app.
Does anyone know some ?
I found JForum but it's a web app which needs to be installed... Maybe should I install it and copy the directory in my application?
I tried jForum, and even if it seems that the project is not continuing, it fits to my application.
To get it working with Spring, I had to use SSO (Single sign-on) by modifying jForum config.
In the file SystemGlobals.properties, I had to change property authentication.type = default to authentication.type = sso.
jForum will use the remote user of the request context.
See classes below for more informations
net.jforum.JForum
net.jforum.ControllerUtils
net.jforum.sso.RemoteUserSSO
net.jforum.sso.SSOUtils