pushkar-90

# Unzip the Fat JAR
RUN mkdir -p target/extracted && \
    java -Djarmode=layertools -jar target/*.jar extract --destination target/extracted

# Copy layers individually for maximum caching
COPY --from=build /app/target/extracted/dependencies/ ./
COPY --from=build /app/target/extracted/spring-boot-loader/ ./
COPY --from=build /app/target/extracted/application/ ./

ENTRYPOINT ["java", "org.springframework.boot.loader.launch.JarLauncher"]

pushkar-90

@WebMvcTest(ProductController.class)
class ProductControllerTest {

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    private ProductService productService; // Service must be mocked in a slice test

    @Test

pushkar-90

@Testcontainers
@SpringBootTest
class MyIntegrationTest {

    @Container
    @ServiceConnection
    static PostgreSQLContainer<?> postgres = new PostgreSQLContainer<>("postgres:16-alpine");

    @Test
    void testDatabaseLogic() {

pushkar-90

@WebMvcTest(UserController.class)
class UserControllerTest {

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    private UserService userService; // This mock is injected into UserController

    @Test

pushkar-90

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class MyIntegrationTest {

    @Autowired
    private WebTestClient webTestClient;

    @Test
    void testHelloWorldEndpoint() {
        webTestClient.get().uri("/api/hello")
            .exchange()

pushkar-90

dependencies {
    developmentOnly 'org.springframework.boot:spring-boot-devtools'
}

pushkar-90

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <optional>true</optional>
</dependency>

pushkar-90

server:
  shutdown: graceful

spring:
  lifecycle:
    timeout-per-shutdown-phase: 30s

pushkar-90

databaseChangeLog:
  - changeSet:
      id: 1
      author: gemini
      changes:
        - createTable:
            tableName: users
            columns:
              - column:
                  name: id

pushkar-90

CREATE TABLE users (
    id BIGINT PRIMARY KEY,
    username VARCHAR(255) NOT NULL
);