Exec maven plugin java parameters

MojoHaus /
Exec Maven Plugin /
Usage
| Last Published: 2022-07-19
| Version: 3.1.0
Maven

Usage

Exec goal

You can formally specify all the relevant execution information in the plugin configuration. Depending on your use case, you can also specify some or all information using system properties.

Command line

Using system properties you would just execute it like in the following example.

mvn exec:exec -Dexec.executable="maven" [-Dexec.workingdir="/tmp"] -Dexec.args="-X myproject:dist"

POM Configuration

Add a configuration similar to the following to your POM:

 .   org.codehaus.mojo exec-maven-plugin 3.1.0  . exec    maven /tmp -X myproject:dist . en_US      .

Java goal

This goal helps you run a Java program within the same VM as Maven.

Differences compared to plain command line

The goal goes to great length to try to mimic the way the VM works, but there are some subtle differences. Today all differences come from the way the goal deals with thread management.

command line	Java Mojo
The VM exits as soon as the only remaining threads are daemon threads	By default daemon threads are joined and interrupted once all known non daemon threads have quit. The join timeout is customisable The user might wish to further cleanup by stopping the unresponsive threads. The user can disable the full extra thread management (interrupt/join/[stop])

Read the documentation for the java goal for more information on how to configure this behavior.

If you find out that these differences are unacceptable for your case, you may need to use the exec goal to wrap your Java executable.

Command line

If you want to execute Java programs in the same VM, you can either use the command line version

mvn exec:java -Dexec.mainClass="com.example.Main" [-Dexec.args="argument1"] .

POM Configuration

or you can configure the plugin in your POM:

 .   org.codehaus.mojo exec-maven-plugin 3.1.0  . java    com.example.Main argument1 .  myproperty myvalue  .     .

Note: The java goal doesn’t spawn a new process. Any VM specific option that you want to pass to the executed class must be passed to the Maven VM using the MAVEN_OPTS environment variable. E.g.

Otherwise consider using the exec goal.

Источник

Exec Maven Plugin — Running Java Programs from Maven Build

While we believe that this content benefits our community, we have not yet thoroughly reviewed it. If you have any suggestions for improvements, please let us know by clicking the “report an issue“ button at the bottom of the tutorial.

exec:exec — can be used to execute any program in a separate process.
exec:java — can be used to run a Java program in the same VM.

In this tutorial, we will learn how to use exec:java to run a Java program from our maven project.

Step 1: Adding exec-maven-plugin Configurations to pom.xml

If you want to use any maven plugin, you need to configure it in the pom.xml build section. Just add the below plugin configuration to your project pom.xml file.

plugin> groupId>org.codehaus.mojogroupId> artifactId>exec-maven-pluginartifactId> version>1.6.0version> configuration> mainClass>com.journaldev.maven.utils.BuildInfomainClass> configuration> plugin>

The most important point to note here is the “mainClass” element inside the “configuration”. This is where we specify the Java class that will be executed by the exec:java goal.

Here is the content of the Java class. It’s a simple class where we are printing Java version details and the current time.

package com.journaldev.maven.utils; import java.time.LocalDateTime; public class BuildInfo  public static void main(String[] args)  String javaVersion = Runtime.version().toString(); String time = LocalDateTime.now().toString(); System.out.println("********\nBuild Time: " + time + "\nJava Version: " + javaVersion + "\n********"); > >

Step 2: Running the maven build with exec:java goal

Here is the output when we run the maven build with the exec:java goal.

$ mvn exec:java [INFO] Scanning for projects... [INFO] [INFO] --------------- com.journaldev.maven:maven-example-jar >--------------- [INFO] Building maven-example-jar 0.0.1-SNAPSHOT [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- exec-maven-plugin:1.6.0:java (default-cli) @ maven-example-jar --- ******** Build Time: 2020-01-10T12:44:17.718061 Java Version: 13.0.1+9 ******** [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 0.591 s [INFO] Finished at: 2020-01-10T12:44:17+05:30 [INFO] ------------------------------------------------------------------------ $

References:

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Источник

Exec maven plugin java parameters

Запуск программ Java в сборке Maven

1: Настройка плагина в pom.xml

2: Запуск сборки maven с целью exec:java