SpringBoot Tutorial

Videos Available here

All the tutorial videos are available on Saggu.uk YouTube channel.

Spring Profiles

How to run using a profile?

mvn spring-boot:run -DskipTests -Dspring-boot.run.profiles={Profile-Name}

e.g. For Dev

mvn spring-boot:run -DskipTests -Dspring-boot.run.profiles={Profile-Name}

e.g. Different Port

mvn spring-boot:run -Dspring-boot.run.arguments=--server.port=8080
mvn spring-boot:run -Dspring-boot.run.arguments=--server.port=8090

or

mvn clean install -DskipTests
java -jar target/springboot-tutorial-0.0.1-SNAPSHOT.jar --server.port=8080 --management.server.port=9090

Spring Caching

Note: Just enable one cache provider

Redis

Dependency

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
    <version>${cache.version}</version>
</dependency>

application.yml

Add the following:

spring:
  cache:
    redis:
      time-to-live: 100S
    type: redis

How to install Redis using Docker?

• docker pull redis
• docker run --name saggu.uk -p 6379:6379 -d redis

Hazelcast

Dependency

<dependency>
    <groupId>com.hazelcast</groupId>
    <artifactId>hazelcast-all</artifactId>
    <version>4.2.4</version>
</dependency>

Add hazelcast.yaml

hazelcast:
  network:
    join:
      multicast:
        enabled: true

Flyway

Using Maven

H2

mvn clean -Dflyway.configFiles=src/main/docker/flyway-h2.conf -Dflyway.locations=filesystem:src/main/resources/db/migration/ flyway:migrate

Postgres

mvn clean -Dflyway.configFiles=src/main/docker/flyway-postgres.conf -Dflyway.url=jdbc:postgresql://localhost:5432/postgres -Dflyway.locations=filesystem:src/main/resources/db/migration/ flyway:migrate

Other goals

Official doc: https://flywaydb.org/documentation/usage/maven/

Name	Description
migrate	Migrates the database
clean	Drops all objects in the configured schemas
info	Prints the details and status information about all the migrations
validate	Validates the applied migrations against the ones available on the classpath
undo	Flyway Teams Undoes the most recently applied versioned migration
baseline	Baselines an existing database, excluding all migrations up to and including baselineVersion
repair	Repairs the schema history table

Connect to H2 Database from IntelliJ

Database > Add New > H2
    URL: `jdbc:h2:file:./springboot-tutorial/target/foobar`<br>
    UserName: sa<br>
    Pwd: <Empty>

Using Docker

Run docker compose up -d from src/main/docker folder.

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