Configuring Java Stack

Java Stack

Standards Compliance

Dimensions: 11/13 (Foundation + Quality Gates + Security)

Toolchain

Stack Dimensions

Quick Reference

mvn clean install -DskipTests
mvn spotless:apply
mvn spotbugs:check checkstyle:check
mvn compile
mvn test -Dgroups="!integration"
mvn clean verify -Dgroups="!integration"

Docker Compatibility

Web services: Bind to 0.0.0.0 (not 127.0.0.1)

# application.properties
server.address=0.0.0.0
server.port=${PORT:8080}

Standard Justfile Interface

Implements: aug-just/justfile-interface (Level 0 baseline) Requires: aug-just plugin for justfile management

set shell := ["bash", "-uc"]

# Show all available commands
default:
    @just --list

# Install dependencies and setup development environment
dev-install:
    mvn clean install -DskipTests

# Format code (auto-fix)
format:
    mvn spotless:apply

# Lint code (auto-fix, complexity threshold=10)
lint:
    mvn spotbugs:check checkstyle:check

# Type check code
typecheck:
    mvn clean compile

# Run unit tests
test:
    mvn test -Dgroups="!integration"

# Run tests in watch mode
test-watch:
    mvn fizzed-watcher:run

# Run unit tests with coverage threshold (96%)
coverage:
    mvn clean verify -Dgroups="!integration" -Djacoco.haltOnFailure=true

# Run integration tests with coverage report (no threshold)
integration-test:
    mvn verify -Dgroups="integration"

# Detailed complexity report for refactoring decisions
complexity:
    mvn pmd:pmd

# Show N largest files by lines of code
loc N="20":
    @echo "📊 Top {{N}} largest files by LOC:"
    @cloc src/ --by-file --include-lang=Java --quiet | sort -rn | head -{{N}}

# Show outdated packages
deps:
    mvn versions:display-dependency-updates

# Check for security vulnerabilities
vulns:
    mvn dependency-check:check

# Analyze licenses (flag GPL, etc.)
lic:
    mvn license:add-third-party

# Generate software bill of materials
sbom:
    mvn org.cyclonedx:cyclonedx-maven-plugin:makeAggregateBom

# Build artifacts
build:
    mvn clean package

# Run all quality checks (format, lint, typecheck, coverage - fastest first)
check-all: format lint typecheck coverage
    @echo "✅ All checks passed"

# Remove generated files and artifacts
clean:
    mvn clean

pom.xml Configuration

Key plugins:

<properties>
    <maven.compiler.source>21</maven.compiler.source>
    <maven.compiler.target>21</maven.compiler.target>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
    <!-- JUnit 5 -->
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter</artifactId>
        <version>5.10.1</version>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <!-- Spotless: formatting -->
        <plugin>
            <groupId>com.diffplug.spotless</groupId>
            <artifactId>spotless-maven-plugin</artifactId>
            <version>2.43.0</version>
            <configuration>
                <java>
                    <googleJavaFormat>
                        <version>1.19.2</version>
                        <style>GOOGLE</style>
                    </googleJavaFormat>
                </java>
            </configuration>
        </plugin>

        <!-- SpotBugs: static analysis -->
        <plugin>
            <groupId>com.github.spotbugs</groupId>
            <artifactId>spotbugs-maven-plugin</artifactId>
            <version>4.8.3.0</version>
            <configuration>
                <effort>Max</effort>
                <threshold>Low</threshold>
                <failOnError>true</failOnError>
            </configuration>
        </plugin>

        <!-- JaCoCo: coverage -->
        <plugin>
            <groupId>org.jacoco</groupId>
            <artifactId>jacoco-maven-plugin</artifactId>
            <version>0.8.11</version>
            <executions>
                <execution>
                    <id>check</id>
                    <goals>
                        <goal>check</goal>
                    </goals>
                    <configuration>
                        <rules>
                            <rule>
                                <limits>
                                    <limit>
                                        <counter>LINE</counter>
                                        <value>COVEREDRATIO</value>
                                        <minimum>0.96</minimum>
                                    </limit>
                                </limits>
                            </rule>
                        </rules>
                    </configuration>
                </execution>
            </executions>
        </plugin>

        <!-- Checkstyle: complexity check -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-checkstyle-plugin</artifactId>
            <version>3.3.1</version>
            <configuration>
                <configLocation>google_checks.xml</configLocation>
                <failsOnError>true</failsOnError>
            </configuration>
        </plugin>
    </plugins>
</build>

Notes

• Tag integration tests: @Tag("integration") (JUnit 5)
• Unit tests (untagged) run in check-all with 96% threshold
• Treat compiler warnings as errors: -Xlint:all -Werror

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