Dockerfile.flink

## BUILD STAGE
FROM eclipse-temurin:18-jdk AS build

RUN apt-get update && \
  apt-get install -y maven wget && \
  apt-get clean

# Set the working directory in the container
WORKDIR /opt/flink

# Download kafka binaries, so we can communicate with the kafka cluster
RUN wget https://archive.apache.org/dist/kafka/3.0.0/kafka_2.13-3.0.0.tgz && \
   tar xzf kafka_2.13-3.0.0.tgz && \
   rm kafka_2.13-3.0.0.tgz

# Add the Kafka command-line tools to the PATH
ENV PATH="/opt/flink/kafka_2.13-3.0.0/bin:${PATH}"

# Copy only the POM file to download dependencies
COPY flinkfood-demo/pom.xml .
COPY flinkfood-demo/CustomerViewJob/pom.xml .
COPY flinkfood-demo/RestaurantViewJob/pom.xml .
COPY flinkfood-demo/DishViewJob/pom.xml .

# Download dependencies
RUN mvn -B dependency:resolve-plugins dependency:resolve clean package

# Copy the rest of the project
COPY flinkfood-demo/ .

# Run Maven build and create necessary directories
RUN mvn clean package

# Copy the entry script to the build stage
COPY flink_start.sh /opt/flink/entry.sh
RUN chmod +x /opt/flink/entry.sh

## RUN STAGE
# Use a smaller base image for the runtime stage
FROM flink:latest

# Set the working directory in the container
WORKDIR /opt/flink

# Copy necessary files from the build stage
COPY --from=build /opt/flink /opt/flink

# Execute the entry script as the CMD
CMD ["/opt/flink/entry.sh"]