feat: Bundle a MySQL driver

README.md

@@ -150,6 +150,21 @@ For example, using PostgreSQL:
 
 See the [docker-compose file](docker/docker-compose.yml) (profile: `postgres`) for a sample configuration with PostgreSQL. 
 
+The configuration for using MySql is similar but with an additional setting for the Hibernate naming strategy:
+
+```
+- spring.datasource.url=jdbc:mysql://db:3306/simple_monitor
+- spring.datasource.username=root
+- spring.datasource.password=zeebe
+- spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver
+- spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect
+- spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
+```
+
+* the MySql database driver is already bundled
+
+See the [docker-compose file](docker/docker-compose.yml) (profile: `mysql`) for a sample configuration with MySql.
+
 ## Code of Conduct
 
 This project adheres to the Contributor Covenant [Code of

docker/docker-compose.yml

@@ -65,6 +65,42 @@ services:
     profiles:
       - postgres
 
+  simple-monitor-mysql:
+    container_name: zeebe-simple-monitor-mysql
+    image: ghcr.io/camunda-community-hub/zeebe-simple-monitor:2.4.1
+    environment:
+      - zeebe.client.broker.gateway-address=zeebe:26500
+      - zeebe.client.worker.hazelcast.connection=zeebe:5701
+      - spring.datasource.url=jdbc:mysql://mysql-zeebe-simple-monitor:3306/simple_monitor?createDatabaseIfNotExist=true
+      - spring.datasource.username=root
+      - spring.datasource.password=zeebe
+      - spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver
+      - spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect
+      - spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
+    ports:
+      - "8082:8082"
+    depends_on:
+      - zeebe
+      - mysql-zeebe-simple-monitor
+    networks:
+      - zeebe_network
+    profiles:
+      - mysql
+
+  mysql-zeebe-simple-monitor:
+    image: mysql:8
+    restart: always
+    environment:
+      MYSQL_ROOT_PASSWORD: zeebe
+    volumes:
+      - mysql-zeebe-simple-monitor-data:/var/lib/mysql
+    networks:
+      - zeebe_network
+    profiles:
+      - mysql
+
 volumes:
   postgres-zeebe-simple-monitor-data:
     driver: local
+  mysql-zeebe-simple-monitor-data:
+    driver: local

pom.xml

@@ -145,6 +145,11 @@
             <artifactId>postgresql</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+        </dependency>
+
         <!-- js libs -->
 
         <dependency>
@@ -206,6 +211,13 @@
             <scope>test</scope>
         </dependency>
 
+        <dependency>
+            <groupId>org.testcontainers</groupId>
+            <artifactId>mysql</artifactId>
+            <version>1.17.3</version>
+            <scope>test</scope>
+        </dependency>
+
         <!-- hot swapping, live reload -->
         <dependency>
             <groupId>org.springframework.boot</groupId>

src/test/java/io/zeebe/monitor/repository/ZeebeApplicationMysqlTest.java

@@ -0,0 +1,28 @@
+package io.zeebe.monitor.repository;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+import org.springframework.transaction.annotation.Transactional;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest
+@ContextConfiguration(
+        classes = {TestContextJpaConfiguration.class},
+        loader = AnnotationConfigContextLoader.class)
+@Transactional
+@ActiveProfiles({"mysql-docker", "application-junittest.yaml"})
+public class ZeebeApplicationMysqlTest {
+
+    @Autowired
+    private VariableRepository variableRepository;
+
+    @Test
+    void setup_of_mysql_should_work() {
+        assertThat(variableRepository).isNotNull();
+    }
+}

src/test/resources/application-mysql-docker.yaml

@@ -0,0 +1,13 @@
+spring:
+  datasource:
+    url: jdbc:tc:mysql:latest:///test
+    username: test
+    password: test
+  jpa:
+    properties:
+      hibernate:
+        dialect: org.hibernate.dialect.MySQL8Dialect
+      naming:
+        physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
+    hibernate:
+      ddl-auto: create