Pular para o conteúdo principal

Thorntail development mode: no more redeploys

As a Java developer you know the pain which is having to redeploy the entire application when you want to test the code change you made.

You know that there are IDE plugins that can help in this task, but these IDE plugins may only work in certain conditions, like deploying a WAR in an application server. In 2018 this may not be the case, you may not be working with an application server, you may be doing a fat JAR with all your stuff in there.Or you may not be even using an IDE.

We already talked about Wildfly Swarm here and it was recently renamed to Thorntail and it comes with an out of the box plugin that allows you to set a DEV MODE. In DEV MODE your Java server side code can magically be reloaded without any action on your side, you just have to compile the code, it  watches the class changes and reload the server! Yes, guys, this is Java and no redeploy it needed anymore.

Thorntail hello world

This is Thorntail


To show this feature let's start from the beginning: a Thorntail hello world. There's no Thorntail release, but we can use the snapshot version and there's a hello world example available in Thorntail github, but I used a maven archetype. The following command (considering you have maven and java installed) will generate a simple JAX-RS  (make sure you have added the following repository to your settings.xml:  https://oss.sonatype.org/content/repositories/snapshots)

mvn archetype:generate \
    -DarchetypeGroupId=io.thorntail.archetypes \
    -DarchetypeArtifactId=thorntail-jaxrs-archetype \
    -DarchetypeVersion=1.0-SNAPSHOT \
    -DgroupId=org.fxapps \
    -DartifactId=hello-thorntail \
    -Dversion=1.0-SNAPSHOT

Once you generate your project notice it will come with a built in test. Thorntail has a test framework as well, isn't that awesome?



Run mvn clean package then you can run your service in a few different ways depending on the mode you choose in the thorntail maven plugin (see the documentation for more information). By default it looks to use the mode thin, so to run your app you need to run the script $PROJECT_HOME/target/$FINAL_NAME-bin/bin/run.sh 

Our Hello World is done. Now I want to add a new method to my JAX-RS resource MyResource, don't want to build the project every time I modify MyResource.java, so let's try the thorntail dev tools. 

Using Thorntail dev tools


The first action is to add the thorntail-devtools dependency to the project's pom.xml:


Then make sure that you are using thing mode in thorntail plugin, see:


According to the documentation it will be only active if we set the system variable THORNTAIL_DEV_MODE. So let's set it to reload:

THORNTAIL_DEV_MODE=reload

Having that done, package the project one time by running mvn package, then run the same script mentioned previously: $PROJECT_HOME/target/$FINAL_NAME-bin/bin/run.sh 

In the screencast below it you can see how it works (restart mode).



With a simple tool I can observe changes in the src/main directory and run mvn compile.
In the video you will see only the restart mode, I will update this post with reload mode soon.

That's all, folks the application code can be found on my github!
Marcadores:

Comentários

Postar um comentário

Postagens mais visitadas deste blog

Creating custom Work Item Handler in BPM Suite/jBPM 6

Hi all! In this post I am going to share my experience creating a work item handler for BPM Suite 6.0.3 (which is very similar to jbpm as explained in a previous post ). The Hello World Work Item Handler Let's create a really simple WorkItemHandler just to print "Hello World" in the console. Of course you can implement more feature and make it receive parameters, access database, web services, etc. But in this post we will keep it simple. Really simple. First thing to do is to create a maven project for my WorkItemHandler. Here's the pom.xml of my Maven project: Notice that we are importing jbpm dependency so we can find the java interface that is used to create work item handlers. Now we can start coding. Let's create a class name HelloWorkItemHandler in package org.jugvale.jbpm, here is the simple code: Now we can build our project and go to BPM Suite to configure it so we can use this workitem. Registering the WorkItemHandler UPDATE...
17 comentários
Leia mais

Simplest JavaFX ComboBox autocomplete

Based on this Brazilian community post , I've created a sample Combobox auto complete. What it basically does is: When user type with the combobox selected, it will work on a temporary string to store the typed text; Each key typed leads to the combobox to be showed and updated If backspace is type, we update the filter Each key typed shows the combo box items, when the combobox is hidden, the filter is cleaned and the tooltip is hidden:   The class code and a sample application is below. I also added the source to my personal github , sent me PR to improve it and there are a lot of things to improve, like space and accents support.
2 comentários
Leia mais

Dancing lights with Arduino - The idea

I have been having fun with Arduino these days! In this article I am going to show how did I use an electret mic with Arduino to create a Dancing Lights circuit. Dancing Lights   I used to be an eletronician before starting the IT college. I had my own electronics maintenance office to fix television, radios, etc. In my free time I used to create electronic projects to sell and I made a few "reais" selling a version of Dancing lights, but it was too limited: it simply animated lamps using a relay in the output of a 4017 CMOS IC. The circuit was a decimal counter  controlled by a 555. 4017 decimal counter. Source in the image When I met Arduino a few years ago, I was skeptical because I said: I can do this with IC, why should I use a microcontroller. I thought that Arduino was for kids. But now my pride is gone and I am having a lot of fun with Arduino :-) The implementation of Dancing Lights with Arduino uses an electret mic to capture the sound and light leds...
Postar um comentário
Leia mais