Max Rydahl Andersen [
https://community.jboss.org/people/maxandersen] modified the
document:
"JBoss Tools Litmus test(s) for project examples/archetypes"
To view the document, visit:
https://community.jboss.org/docs/DOC-17655
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You have created you awesome project example or archetype which creates such example - now
how do you know if it works well and especially works well with JBoss Tools ?
h2. Import + Run
The basic litmus test for an example that is a web/ear applicaiton is the following
steps:
1) The project can be imported directly and without any errors and no serious warnings
with either *File > Import > Existing Projects into Workspace* or *File > Import
> Existing Maven Projects **
2) The project can be "Runned" on an Installed JBoss server in JBoss Tools by
right clicking the project and choose *Run As > Run On Server* which should cause the
server to get started, the project to be deployed and then be shown in a web browser
(either internally inside Eclipse or externally dependent on your configuration)
*Note:* For #1 if your project example/archetype is available from JBoss Central view then
this is the basic operation JBoss Central does so using steps in #1 or from JBoss Central
are equally good to test if the example works.
If the project deploys and run after the two steps above there is a good chance you've
at enabled users to easily try out the example, but there can be a few other good
tests/validations to do to make sure the project is using things like Maven and JBoss
Tools to the fullest and without encouraging bad practices.
Here are a few of the ones we have noticed while trying out examples from various teams:
h3. Unnecessary/wrong Jar's being packaged / Missing proper dependency scope
It's a common occurrence that when you use Maven you have a tendency to just add
dependencies to the project until things start to work - unfortunately that can have the
sideeffect of adding unnecessary jar's into the War or Ear which makes the deployment
unnecessary heavy and might cause hard to understand/fix runtime issues.
Adding the following to a pom.xml:
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
</dependency>
will have such potential side effect.
It will make the project compile if it uses CDI api's but it will also bundle the CDI
jars into the project. For JBoss AS 7.x this probably will be fine at runtime since JBoss
AS 7.x will choose its CDI classes over the bundled API's but it for sure makes your
deployment too big and filled with jars that has no purpose.
The proper solution is to remember to set the proper dependency scope, like this:
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<scope>provided</scope>
</dependency>
Now the project will compile but will assume the jar's are provided in the runtime and
thus not bundle the jars.
Thus to fix this look at the actual generated war deployment from mvn command line AND
JBoss Tools (since there might be subtle differences) and check if all the files
(especially the jars) in the deployment actually deserves to be present.
Note: this test is for some a great eyeopener how it affects users of runtimes if the
runtimes pom.xml is way too greedy about adding dependencies that is not warranted.
h2. Not utilizing the IDE where it should or could
The whole point of using pom.xml is so that tools (like Maven, Eclipse, IntelliJ, netbeans
etc.) has a common set of metadata to read and from that do what it does best: provide
tools for editing, navigating, building, deploying etc.
Most runtime devs know what Maven does since they use it to build the runtime, but fewer
actually realizes what an IDE does since many rutime devs does not actually try and use
their runtime as a user, not realizing which features the IDE provides or could provide.
An example is that JBoss Tools server adapter actually provides incrementally deployment
of files, meaning there is no time spent on packaging/deployment - it just happens when
you save the individual files.
More to come...
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