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mvnd: Maven Daemon

The mvnd project aims to provide a daemon infrastructure for maven based builds. It borrows techniques from Gradle and Takari to provide a simple and efficient system.

Install mvnd

  • Download the latest ZIP suitable for your platform from https://github.com/mvndaemon/mvnd/releases

  • Unzip to a directory of your choice

  • Add the bin directory to PATH

  • Optionally, you can create ~/.m2/mvnd.properties and set the java.home property in case you do not want to bother with setting JAVA_HOME environment variable.

  • Test whether mvnd works:

    $ mvnd --version
Maven Daemon 0.0.0 (native)
Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /home/ppalaga/orgs/mvnd/mvnd/daemon/target/maven-distro
Java version: 11.0.1, vendor: AdoptOpenJDK, runtime: /home/data/jvm/adopt-openjdk/jdk-11.0.1+13
Default locale: en_IE, platform encoding: UTF-8
OS name: "linux", version: "5.6.13-200.fc31.x86_64", arch: "amd64", family: "unix"

    If you are on Windows and see a message that VCRUNTIME140.dll was not found, you need to install vc_redist.x64.exe from https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads. See oracle/graal#1762 for more information.

Usage

mvnd is designed to accept the same command line options like stock mvn (plus some extras - see below), e.g.:

mvnd clean install

mvnd specific options

--status lists running daemons

--stop kills all running daemons

Build mvnd from source

Prerequisites:

  • git

  • Maven

  • Download and unpack GraalVM CE from GitHub

  • Set JAVA_HOME to where you unpacked GraalVM in the previous step. Check that java -version output is as expected:

    $ $JAVA_HOME/bin/java -version
openjdk version "11.0.7" 2020-04-14
OpenJDK Runtime Environment GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02)
OpenJDK 64-Bit Server VM GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02, mixed mode, sharing)

  • Install the native-image tool:

    $ $JAVA_HOME/bin/gu install native-image

  • native-image may require additional software to be installed depending on your platform - see the native-image documentation.

Build mvnd

$ git clone https://github.com/mvndaemon/mvnd.git
$ cd mvnd
$ mvn clean verify -Pnative
...
$ cd client
$ file target/mvnd
target/mvnd: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=93a554f3807550a13c986d2af9a311ef299bdc5a, for GNU/Linux 3.2.0, with debug_info, not stripped
$ ls -lh target/mvnd
-rwxrwxr-x. 1 ppalaga ppalaga 25M Jun  2 13:23 target/mvnd

This project is still in prototype mode, so feedback is most welcomed!