Dockerfile

# FluxPay Engine Dockerfile
# jammy (NOT alpine) — Alpine's musl libc crashes Gradle native-platform lib on ARM/Docker

FROM eclipse-temurin:21-jdk-jammy AS builder
WORKDIR /app

# Gradle wrapper & build files first for caching
COPY gradlew gradlew.bat ./
COPY gradle/ gradle/
COPY build.gradle settings.gradle ./

# Download dependencies (cached layer)
RUN ./gradlew dependencies --no-daemon || true

# Copy source
COPY src/ src/

# Build (skip tests — run separately)
RUN ./gradlew build -x test --no-daemon

# Runtime image
FROM eclipse-temurin:21-jre-jammy
WORKDIR /app

# Jolokia agent for JMX metrics exposure via HTTP
ARG JOLOKIA_VERSION=2.1.2
ADD https://repo1.maven.org/maven2/org/jolokia/jolokia-agent-jvm/${JOLOKIA_VERSION}/jolokia-agent-jvm-${JOLOKIA_VERSION}-javaagent.jar \
    /app/jolokia-agent-jvm.jar

# Copy built jar
COPY --from=builder /app/build/libs/*.jar app.jar

EXPOSE 8080 8778

ENTRYPOINT ["java", "-javaagent:/app/jolokia-agent-jvm.jar=port=8778,host=0.0.0.0", "-jar", "app.jar"]