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In other tutorials, we examined the phases of the clean, default (build), and site lifecycles. It is possible to attach a goal to one of these phases so that it is executed when the phase is executed. In another tutorial, we created a plugin called "maven-howdy-plugin" containing the goal "howdy-world". Here, we will see how to attach this goal to the "validate" phase of the mavenSW default lifecycle.

The following fragment of a pom.xml file shows how to attach the "howdy-world" goal to the "validate" lifecycle phase. To do this, we specify the executions.execution.goals.goal to be "howdy-world", and we specify the executions.execution.phase to be "validate".

Plugin entry from pom.xml

...
	<plugin>
		<groupId>com.maventest</groupId>
		<artifactId>maven-howdy-plugin</artifactId>
		<version>1.0-SNAPSHOT</version>
		<executions>
			<execution>
				<goals>
					<goal>howdy-world</goal>
				</goals>
				<phase>validate</phase>
			</execution>
		</executions>
	</plugin>
...

Here is the pom.xml file for a project called "aproject". It contains the plugin code to attach "howdy-world" to the "validate" phase. The pluginRepositories section was used to download the plugin from an ArchivaS remote snapshots repository.

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.maventest</groupId>
	<artifactId>aproject</artifactId>
	<packaging>jar</packaging>
	<version>1.0-SNAPSHOT</version>
	<name>aproject</name>
	<url>http://maven.apache.org</url>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>com.maventest</groupId>
				<artifactId>maven-howdy-plugin</artifactId>
				<version>1.0-SNAPSHOT</version>
				<executions>
					<execution>
						<goals>
							<goal>howdy-world</goal>
						</goals>
						<phase>validate</phase>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>
	<pluginRepositories>
		<pluginRepository>
			<id>archiva.snapshots</id>
			<url>http://192.168.1.7:8081/archiva/repository/snapshots</url>
		</pluginRepository>
	</pluginRepositories>
</project>

To test, I'll perform a "mvn validate" on the "aproject" project.

The goal successfully executed for the "validate" phase, as shown here in the console output.

Console output from 'mvn validate' on 'aproject'

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building aproject
[INFO]    task-segment: [validate]
[INFO] ------------------------------------------------------------------------
[INFO] snapshot com.maventest:maven-howdy-plugin:1.0-SNAPSHOT: checking for updates from archiva.snapshots
[INFO] [howdy:howdy-world {execution: default}]
[INFO] Hi there!!!
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2 seconds
[INFO] Finished at: Tue Feb 19 02:18:43 PST 2008
[INFO] Final Memory: 1M/2M
[INFO] ------------------------------------------------------------------------