This project is a mini-twitter app which enables console based users to post messages, follow other users and see their timeline and message wall.

The domain model uses only two entities:

Timeline (Id, Username, Message, Created) - keeps all users messages

Follows (Id, Username, followUser) - keeps which user follows which

The server side utilises Spring Data to abstract out the data access (H2 is used for standalone test and MySQL for deployment) and then provides a HATEOAS REST interface through Spring MVC.

The main console is a very simple java app that connects to the server side via REST interface.

Technologies used:

• Java 8 (date, streams, lamdbas)
• Spring (REST, Data, MVC)
• Flyway
• Gradle
• Embedded Tomcat with H2 for standalone tests
• Docker to build a Tomcat + MySQL container and deploy the app there.

All critical and complex methods are test covered.

Console live test output:

cd console
gradlew run

> Alice -> I love the weather today
Posted a new message for Alice
> Bob -> Damn! We lost!
Posted a new message for Bob
> Bob -> Good game though.
Posted a new message for Bob
> Alice
Alice's timeline:
I love the weather today (39 seconds ago)
> Bob
Bob's timeline:
Good game though. (7 seconds ago)
Damn! We lost! (28 seconds ago)
> Charlie -> I'm in New York today! Anyone wants to have a coffee?
Posted a new message for Charlie
> Charlie follows Alice
Charlie is now following Alice
> Charlie follows Bob
Charlie is now following Bob
> Charlie wall
Charlie's wall:
Charlie - I'm in New York today! Anyone wants to have a coffee?(2 minutes ago)
Bob - Good game though.(3 minutes ago)
Bob - Damn! We lost!(4 minutes ago)
Alice - I love the weather today(4 minutes ago)

./gradlew tomcatRunWar

docker-compose build
docker-compose up

To clear docker volumes:

cd docker-volumes
./clear.sh

cd console
./gradlew run

• You can choose between two profiles: embedded and mysql
• You can change the default profile in: src/main/webapp/WEB-INF/web.xml - spring.profiles.active context-param

You can change the current properties in gradle.properties file - use local ~/.gradle/gradle.properties to store the passwords securely

• http://localhost:8080/javanetwork/api/v1/`{userId}`/timeline.json
• http://localhost:8080/javanetwork/api/v1/`{userId}`/follows.json
• http://localhost:8080/javanetwork/api/v1/`{userId}`/wall.json