I'd like to know the main differences between CloudFoundry and Google App Engine for a personnal project.
I have a web application that currently runs on GAE and i'am thinking to move it to CloudFoundry for various technical reasons.
I'd like to use :
Spring MVC & Spring Security.
a full implementation of JPA instead of DataNucleus.
mavenize my project properly, i can't make the maven-gae-plugin works.
Is CloudFoundry a good alternative to GAE in my case?
What is the complexity of the migration?
Thanks
It shouldn't be too hard to migrate the app.
http://blog.springsource.org/2011/11/10/using-cloud-foundry-services-with-spring-part-4-%E2%80%93-spring-profiles/ and the whole series of articles has lot of details on how to bind your Spring app to a cloudfoundry data source.
http://blog.springsource.com/2011/09/22/rapid-cloud-foundry-deployments-with-maven/ has details about the cloudfoundry maven plugin, for deployment
To migrate your data, you may want to use the remote api http://code.google.com/appengine/docs/java/tools/remoteapi.html or bulkloader to export, then CloudFoundry Caldecott to import your data in CloudFoundry http://blog.cloudfoundry.com/post/12928974099/now-you-can-tunnel-into-any-cloud-foundry-data-service
http://start.cloudfoundry.com/frameworks/java/spring/spring.html the getting started in cloudfoundry for spring is a good place to start learning about deploying spring apps to cloudfoundry.
I hope this helps.
I can only answer the maven part: see this for a working multimodule example: https://github.com/leanengine/LeanEngine-Server
you must use it like this:
mvn gae:unpack // downloads GAE classes to your maven repo
mvn clean install package
cd lean-server-example
mvn gae:execute // starts a local server
Related
I have a web app built with Java, Spring MVC, and JDBC. The result is a WAR file.
To run it, the user has to install Java 8 JDK and Tomcat, and deploy the WAR file to the Tomcat server.
It would be great if they could just download the one file run it as a standalone application.
That is, run "the WAR file" and just browse to http://localhost:8080/myapp
Also, on Windows it would be great it was setup as a Server (like Tomcat is when installed with the installer).
Is there any way to do this? Maybe with Spring Boot or something new like that?
Yep, Spring boot is the way to go.
It allows you to build an executable Jar with all dependencies and a Tomcat (by default, can be changed) embedded.
But users will still need to download a JRE to execute the Jar, and a database if it's required, but you can use en embedded database like H2, HSQLDB..., depends what is your needs.
Yes . you can use spring boot to achieve your results. Kindly refer the below link for sample code
https://mkyong.com/spring-boot/spring-boot-hello-world-example-jsp/
You can use embedded jetty server using maven but that would require you to setup few things your app and may have align your existing app, please check this article for more information.
Jetty is similar to tomcat server in terms of running spring application, there are not much difference in terms of development. Tomcat is just more famous.
Other option as others said, is to migrate your app to spring boot which would be easy if you already have app written in spring (But that depends how much code you have and how much time you have)
After some radical changes to our schema and reading some posts on why you should avoid in memory databases.
We have decided to use MySQL locally for testing and developing. Using a MySQL docker container with a volume for persistence.
This is fairly straightforward however the issues we are having are the following:
Requires the container to be executed separate from the spring boot application (a manual task docker run
Same goes for stopping the container, its a independant process
My question is essentially, is it possible to have spring boot (when using a dev config profile) to manage this docker container.
i.e. I start development work in IntelliJ and run the service, the service checks if the container is running, if not starts it up.
If this idea is bad, then please let me know.
For testing its not issue, because we are using a maven docker plugin to create the container during the maven lifecycle.
Its more for devs working locally, and getting the service running locally with ease.
Any suggestions welcomed!
Bonus for Intellij setup!
It maybe a trivial question for experienced web application developers, but for me as a new developer, I cannot understand that why do we need an application container(like Tomcat or Wildfly) when deploying a Spring Boot web application to Openshift, Heroku, or Google App Engine, etc? My understanding is that Spring Boot already contains an embedded container (Tomcat). Can someone explain this to me? Thanks
SpringBoot is Java API that relies on an embedded Java Servlet engine to support the API calls. These dependencies are typically pulled in by Maven as dependencies. So for the end user, it just looks like a FAR JAR with a bunch dependencies included (where one of those dependencies is Embed Tomcat, Jetty or Undertow for example)
More information can be found on the main SpringBoot project page.
I have developed a micro service (Spring Boot REST service, deployed as executable JAR) to track all activities from third party projects as my requirement and its working now.
Currently it's working apart of some projects, and now I have updated service with some additional features.
But I can't move it to live server without restarting the existing service as it is deployed as jar. I'm afraid to restart my service, restart may be leads to lose data of integrated projects.
What improvements can I make in my architecture to solve my problem?
What about JRebel plugin. It worked perfectly for me, but, unfortunately, it's not a free app. Like alternative, (i used this approach with Spring MVC, with Spring Boot it could be otherwise), I set up a soft link in work directory on a compiled path in JBoss (in my case it was dir with name target and *.class and *.jar files). As for me, the first solution with JRebel is the most appropriate for you.
Finally got a solution as commented by #Gimby .
We can do it by deploying multiple instances of services and it bound to a service registry ,Here i achieved it by using eureka as registry service and also used zuul as proxy .
I am looking for a mvn project template that can be downloaded and used as a kick-off for a web application.
The requeriments are:
Spring security (for user authentication and pages accesing control)
Hibernate integration (for data persistance like users and more)
The application must run on tomcat (i use TomEE)
I have a web application already running with pages and servlets and daos, persistence.xml and more. The problem is that i cant find the way to integrate this app with spring security, and for this reason i am looking for a project template...
Give Spring Boot a shot. You can either use Spring Tool Suite or Spring Initializer site to get a secure web app running and using hibernate as ORM.
You can later choose to run the app in the embedded Tomcat/Jetty or package as WAR and deploy in container of your choice.