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• Development Containers Images
• Available Dev Container Features

Learn more

• Development Containers Specification
• Dev Containers tutorial
• Learn to create a development container
• Main Dev Containers documentation
• How educators can use dev containers
• How students can use dev containers

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        val result = mockMvc.perform(get("/api/v1/books/978-4-7710-1067-3"))
            .andDo(MockMvcResultHandlers.print())
            .andExpect(status().isOk)
            .andReturn()
        val javaType = objectMapper.typeFactory.constructCollectionType(List::class.java, Book::class.java)
        val bookObject: List<Book> = objectMapper.readValue(result.response.contentAsString, javaType)
        assertThat(bookObject[0].price).isEqualTo(100)

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Boot Spring Cloud GCP

Spring Cloud GCP with Cloud SQL

$ ./gradlew clean bootRun --args=""--spring.cloud.gcp.sql.instance-connection-name=(gcloud sql instances describe my-mysql --format='value(connectionName)')""

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.gitignore for Gradle and Maven

HELP.md

### Gradle ###
.gradle
build/
!gradle/wrapper/gradle-wrapper.jar
!**/src/main/**/build/
!**/src/test/**/build/

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Best Practices to build Java Container

1. Use explicit and deterministic Docker base image tags
2. Install only what you need in production in the Java container image
3. Find and fix security vulnerabilities in your Java Docker image
4. Use multi-stage builds
5. Don’t run Java apps as root
6. Properly handle events to safely terminate a Java application
7. Gracefully tear down Java applications
8. Use .dockerignore

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Run Spring Boot app with Profile

Profile

app.name=sample
app.name.profile=default
#---
spring.config.activate.on-profile=dev
app.name.profile=dev
#---

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@ConfigurationProperties

src/main/resources/application.properties

app.config.app-name=Sample

src/main/java/*/properties/AppConfigProperties.java

@Getter

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Project by Gradle Init

$ gradle init -p simple-app --type java-application --dsl groovy --test-framework junit-jupiter --project-name simple-app --package simple.app

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envsubst Template

Template

$ echo 'pwd=${PWD}' > sample.tpl

Convert with Environment Variables

$ envsubst < sample.tpl > sample.txt

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Surefire Report

$ ./mvnw clean \
    test -Dmaven.test.failure.ignore=true \
    site -DgenerateReports=false \
    surefire-report:report

Surefire Report