I'm trying to build a project structure like this:
Project
|--Web_module.war
|--Data_module.jar(Spring)
|--Util_module.jar
|--other public api...
which means, different modules should be packed into different jars, so i have to have more spring configurations(application-context.xml) for different modules (e.g. for data module and for web module).
My question, how could I organize all the configuration files to include them correctly in the web module.
Thanks in advance.
Plan to have a single eclipse project for each jar file that you anticipate.
Choose the jars files / eclipse projects as per your project functionality to be modular and self contained, as far as possible.
Use junit tests in each eclipse project to thoroughly test individual projects/modules, using spring unit test support
Each eclipse project will contain its own spring config context file eg Util_module project might contain a util-context.xml
Finally have an eclipse dynamic web project as a wrapper web application which will aggregate all your "module" projects
UI artifacts like HTML, JS, JSPs, etc plus java code which uses web application contexts like controllers, servlet filters etc should be included in the eclipse web project
In the eclipse web project's java build path, but the module "projects" as "required" projects
In the eclipse web project's deployment assembly, add module "projects" as dependencies.
now when you build-all and deploy the web app, all depending module projects will compile and deploy as well, but more importantly, all project functionality will be divided into seperate modular projects
setup dependencies between projects with care, so as not to introduce cyclic dependencies
dont be afraid to refactor project structure when needed to maintain clean and relevant modules
For your modules to publish their own configuration (and your main application to detect them automatically), you can, in your main applicationContext.xml, import other context.xml files from the classpath using a pattern with wildcards :
<import resource="classpath*:conf/moduleContext.xml" />
This tells spring to find and read files in all jars that match conf/moduleContext.xml.
Note there is a little limitation to this : you must have your context files in at least one directory (not in the root of the classpath). This is why in my example you have de "conf" directory.
Related
We have a EAR project which has a WAR project. Maven is used, so pom.xml. As typical of any project, this project also contains a big feature (say Job Scheduling "JBS") among many other features. As it is planned to retire this whole project in the near future, it is discouraged heavily to spend much on working on this project (whether bugs or enhancements).
Therefore, for the sake of running the (JBS) feature as a separate application, the whole EAR project was duplicated (also to save time/cost). As a result, all the Java packages and classes (necessary for JBS project) were duplicated. In this situation, if we update one or more classes in the main project, this (JBS) feature project/application gets outdated (and needs update).
The fact is that this JBS feature project ONLY requires many packages of Java classes (from the main EAR-WAR project), and do not require 99% of the web modules and others. I am removing all the unnecessary things from JBS project. Then I would like to create a JAR library with all the java classes, so JBS project can have a dependency on this JAR.
I do not know if it is a good idea to separate these classes out of the main project (to create another Java project). I would like to continue to have these classes as part of the main project. Then, it will be good, as and when one or more of these classes are changed, a new version of the JAR will be generated (right away). And the JBS project would then make use of this updated JAR.
How can we accomplish this? I understand, through maven, we can do a build/package jar/war/ear on a project of that nature. I am not an expert with maven (and did not learn it systematically).
But, is there a way to create one or more JARs additionally from inside WAR pom.xml? In other words: I mean pom.xml of WAR will create a WAR. In addition to creating a WAR, can maven help create additional JAR? Or can maven create two packages out of one pom.xml?
Or should I create a separate module in the main project with all these packages/classes, and have its own pom.xml to generate the necessary JAR? For this, most probably I need to modify the structure of the main project. I would like to avoid this unless there is no way out.
Can you advice?
It seems like the best thing for you would be to create a multi-module project that both contains the JAR and the other project. This way, you can easily change/build them together, but you create separate artifacts.
I'm fairly unexperienced and all new to the whole world of build tools so here's my situation: I am developing a webapp with JSF, PrimeFaces and Hibernate on wildfly-9.0.2-final. All java files (incl. ManagedBeans, DAOs, Model classes, etc.) are currently in a regular eclipse java project called MyApp-CORE. There is no html or any other resources in that project, but all the third-party libraries like PrimeFaces, commons-xy, etc. Then I got two dynamic web projects with all the .xhtml files and stuff. Both web projects include the CORE in their build path (all done via eclipse built-in tools). Basically I followed Structure for multiple JSF projects with shared code so far. All projects are versioned using Git. I was now asking myself how to mavenize the whole thing and also how to properly include tests. The final result should be:
I want a build file for each web project that includes the CORE dependency and all of it's transitive dependencies, creates a .war file and deploys it either on the production system or locally (Depending on some parameters I want to be able to maintain).
This buildfile could then for instance test and build the CORE and then the .war file.
Since I'm using JSF, mostly the only option for testing is JSFUnit. Should I test each web project individually and put all the test cases there (which would be highly redundant because they're mostly the same, just a few features are different) or should I rather create a separate web project called MyApp-TEST which tests the CORE.jar and also - depending on some configuration - each web project.
I've already created a structure that makes it possible to include the core in the web project but unfortunately I loose the perks of hot deployment in wildfly when just including it as a dependency from my local maven repository.
So, to summarize it:
What would be a best practice for this setup, eventually leading to a continuous integration scenario?
How should I include the test cases (full integration tests that test actual UI behaviour)?
Which Tool (Maven, Gradle, Ant, etc.) would be best for that task?
Keep using hot deployment for smooth development?
Thanks in advance for any comments, hints or shared experience!
I'm looking for creating a small web framework on top of the standard servlet-3.x specifications. Main motive is to reduce the boiler plate codes and abstractions. After I read the servlet specifications it looks without using JAX-RS or SparkJava I can create small web framework for API developments.
I'm planning to use the web-fragments method to create my framework level filters, and other beans and package it as jar. So application developer create the war project with web.xml with the metadata-complete option set to false.
I can see the web-fragment project template in eclipse but I want to develop this project using maven. With Intellij I can't see any such options for web fragment projects alone. I want to create simple maven project which ship the jar with web-fragment.xml in it, so other war projects can make use of it.
So is there any plugins or other options available to develop web fragment projects in Intellij ?
Any jar file added to the WEB-INF/lib directory of a web application is technically a "web fragment", whether it has a META-INF/web-fragment.xml file or not.
Therefore, you just need to create a maven project with "jar" packaging and import it into Intellij Idea.
Create a maven project for the fragment. Set the packaging to jar. There is no need to create a war project.
Configure an empty Artifact in the Project Structure dialog:
Using the toolbar buttons, add the WEB-INF/lib folders. Then create an Archive and add the compile output:
Add a Tomcat run configuration, and in the Deployment tab, add the Artifact you just created:
I created an example project that includes all that: https://github.com/ThomasR/web-fragment-idea. Please note that it requires TomEE+.
I have removed pom.xml from my eclipse project folder.
And I choose run on server option and everything works fine.
I am new to Spring MVC and have been given this project as an interview round.
Spring version 4.0.6, Tomcat 7, Eclipse Juno
Any help here is appreciated.
pom.xml is the build configuration file for the Maven building tool, Using Maven is optional as you can use any building tool of choice, for example Ant, Maven, Gradle ... etc
The idea behind this build configuration file is that you can define all your dependencies of your project (Spring, Struts, Hibernate, ... etc), source code repository, test cases classes, war file generation info, any other configuration for your project. and If you want to give me your project, you could only give me that pom.xml, and I would simply run maven on this file, and it will download your source code and dependencies, run test cases, build war file and deploy it on application server.
For more information, check the POM reference here
pom.xml is a maven configuration file. You don't need it to run a Spring MVC application.
Having said this, sin maven is what you usually use to build a project, you are not going to be able to build it again if you removed the pom.xml file.
Possible reasons:
You did not reference any Spring MVC class in your Web Appliction
Your Tomcat already has the Spring MVC in its libraries
Spring MVC libraries are copied in your Lib folder of your Web project, so they are carried along within the war (or exploded by the Tomcat plug-in for Eclipse).
As Pablo pointed out, you do not need Maven to add dependencies to your projects.
Why there's a difference in Default Source Lookup Path between GWT and java launch configurations?
In multi-module projects instead of containing projects, the Default folder contains the class folders of those projects!
It causes "Source not found" errors when the debugger steps into a dependency project.
I know I can add projects manually. Just want to know why this difference is needed.
The only project in the list is the associated with the .launch.
GWT needs '.java' source files of dependencies to be able to compile (translate to js) while the Java launcher needs only '.class' compiled files.
I suppose you know GWT has a different way to manage dependencies (through modules within the same project), which is good for some advanced GWT practices like loading a module's js lazily (this feature doesn't work with "foreign" libs/projects).
So this could also be an answer for why eclipse GWT doesn't suppose you will have more projects (but more modules instead)
Finally if you really have an independent GWT lib that you're maintaining this is an issue as you said.