Java in Container

Repository contains pptx presentation and users-app Java application used in my talk: "Java in Container - Best Practicies for containerized Java Apps" which I gave at JDD

Presentation

JavaInContainer.pptx

Java Application

Application used as Demo in my presentation is located HERE. It's simple REST API application, features:

• Spring Boot App
• Uses MySQL as storage
• REST API
• Purpose - CRUD operations over Users dataset

Prerequisits

• Java 8+
• Docker
• Maven

Database deploy

cd users-app/db
./mysql.sh start # starts docker image with MySQL locally
./mysql.sh create-db  # creates DB in docker image with MySQL
./mysql.sh test  # tests whether the DB is working properly, the output should be:
+----+-----------+------------+------------+
| id | firstName | secondName | birthDate  |
+----+-----------+------------+------------+
|  1 | Tom       | Tailor     | 1962-07-04 |
|  2 | Tommy     | Hilfiger   | 1976-01-28 |
|  3 | Coco      | Chanel     | 1917-02-14 |
+----+-----------+------------+------------+

Application deploy

Application uses mysql as address of DB, so to configure your local development please add 127.0.0.1 mysql entry in your /etc/hosts file to make it working locally.

Please note that all commands are run from users-app directory.

Build java app:

./mvnw clean install

Run Java app:

java -jar target/users-app-1.0.jar

To test whether application works, open: http://localhost:8080/api/users - 3 users should be shown to you.

To build docker image with appropriate Dockerfile:

docker build -f v1.Dockerfile --tag="mateuszdyminski/users-app:v1" .

where v1 if prefix for Dockerfile, there are 6 different Dockerfiles provided.

To run application in Docker:

docker run -d --link db:mysql -p 8080:8080 "mateuszdyminski/users-app:v1"

Credits

This presentation would not have been possible without:

• Docker Containers & Java: What I Wish I Had Been Told
• Docker signals
• Spring Boot Docker

Images comes from: https://unsplash.com/