Dockerfile for 1brc

.dockerignore

@@ -0,0 +1,13 @@
+.github
+.git
+.idea
+*.log
+*.zip
+measurements.txt
+measurements_1B.txt
+out_expected.txt
+out_expected_1B.txt
+target/
+
+Dockerfile
+.env

.gitignore

@@ -45,4 +45,4 @@ out/
 # 1BRC
 /measurements*.txt
 /*.out
-out_expected.txt
+out_expected*.txt

.mvn/wrapper/maven-wrapper.properties

@@ -14,5 +14,5 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.4/apache-maven-3.8.4-bin.zip
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/4.0.0-alpha-8/apache-maven-4.0.0-alpha-8-bin.zip
 wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar

Dockerfile

@@ -0,0 +1,78 @@
+#
+#  Copyright 2023 The original authors
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#
+
+# syntax=docker/dockerfile:1
+# Use an official Fedora Linux as a base image
+FROM fedora:latest as build-sdkman
+ARG JAVA_VERSIONS
+# Maintain a variable providing a list of required packages (for easier maintenance)
+ENV _PACKAGES="curl zip unzip"
+# Maintain a variable providing a list of java versions to always install (for easier maintenance)
+ENV _JAVA_VERSIONS="21.0.1-open"
+# Install necessary packages
+RUN dnf -y update && dnf -y install ${_PACKAGES}
+# Clear DNF caches to reduce image size
+RUN dnf clean all
+# Install SDKMAN!
+RUN curl -s "https://get.sdkman.io" | bash
+# this SHELL command is needed to allow using source
+SHELL ["/bin/bash", "-c"]
+# Look for SDKMAN and load it into the shell session
+RUN echo "source /root/.sdkman/bin/sdkman-init.sh" >> /root/.bashrc
+# Install default java versions
+RUN for JAVA_VERSION in $_JAVA_VERSIONS; do source "/root/.sdkman/bin/sdkman-init.sh" && sdk install java $JAVA_VERSION;  done
+# Install jbang
+RUN source "/root/.sdkman/bin/sdkman-init.sh" && sdk install jbang
+# Install SDK versions
+RUN for JAVA_VERSION in $JAVA_VERSIONS; do source "/root/.sdkman/bin/sdkman-init.sh" && sdk install java $JAVA_VERSION;  done
+
+FROM fedora:latest as build-1brc
+ARG PACKAGES
+# Maintain a variable providing a list of required packages (for easier maintenance)
+ENV _PACKAGES="diffutils perl-Digest-SHA hyperfine jq numactl bc gcc zlib-devel git"
+
+COPY --from=build-sdkman /root/.sdkman /root/.sdkman
+# Source sdkman in all shells (alternative to adding to PATH)
+# this SHELL command is needed to allow using source
+SHELL ["/bin/bash", "-c"]
+# Look for SDKMAN and load it into the shell session
+RUN echo "source /root/.sdkman/bin/sdkman-init.sh" >> /root/.bashrc
+# Manually add sdkman to PATH
+ENV PATH="/root/.sdkman/bin:$PATH"
+# Install necessary packages
+RUN dnf -y update && dnf -y install ${_PACKAGES}
+# Install requested extra build packages
+RUN if [ -n "$PACKAGES" ] ; then dnf -y install $PACKAGES ; else echo "PACKAGES is empty, run docker build --build_arg PACKAGES=<extra packages to install in the image> ." ; fi
+# Clear DNF caches to reduce image size
+RUN dnf clean all
+
+ARG REPOSITORY="https://github.com/gunnarmorling/1brc.git"
+# Checkeout the repository
+RUN git clone $REPOSITORY
+
+WORKDIR 1brc
+# Initialize SDKMAN and download project dependencies to work offline
+RUN source "/root/.sdkman/bin/sdkman-init.sh" \
+# Cache local repo
+    && ./mvnw dependency:go-offline \
+# Build the project
+    && ./mvnw package
+
+FROM build-1brc
+# Set the working directory in the container to /app
+WORKDIR /1brc
+# Copy the files from the workspace
+COPY / .

README.md

@@ -266,6 +266,26 @@ or directly on the .java file:
 
 When you run this, it will generate a flamegraph in profile.html. You can then open this in a browser and see where your program is spending its time.
 
+## Building the Docker image
+
+Build the image by default it will install java 21.0.1-open.
+
+❗To keep the image size reasonable it will not generate the measurements_1B.txt and out_expected.txt files
+
+```shell
+    docker build . -t 1brc
+```
+To configure the build image you can pass the following build_arg
+* --build-arg JAVA_VERSION=\<additional java distribuitions to install>
+* --build-arg PACKAGES=\<additional packages to install with dnf> 
+```shell
+  docker build -build-arg JAVA_VERSIONS="21.0.1-graal 21.0.1-graalce" . -t 1brc  
+```
+When running the container you need to specify the measurements_1B.txt and out_expected.txt files.
+```shell
+  docker run -it -v ${pwd}/measurements_1B.txt:/1brc/measurements_1B.txt -v ${pwd}/out_expected_1B.txt:/1brc/out_expected.txt 1brc
+```
+
 ## Rules and limits
 
 * Any of these Java distributions may be used:

pom.xml

@@ -207,7 +207,7 @@
                 <exclude>**/.dontdelete</exclude>
                 <exclude>**/measurements*.txt</exclude>
                 <exclude>**/measurements*.out</exclude>
-                <exclude>out_expected.txt</exclude>
+                <exclude>out_expected*.txt</exclude>
                 <exclude>github_users.txt</exclude>
                 <!-- Cliff asked to be named as the copyright holder for his entry; -->
                 <exclude>src/main/java/dev/morling/onebrc/CalculateAverage_cliffclick.java</exclude>