// 簡(jiǎn)化后的Maven擴(kuò)展加載邏輯
public class DefaultExtensionManager {
    public void loadExtensions(List<Artifact> extensions) {
        for (Artifact artifact : extensions) {
            // 加載包含META-INF/maven/extension.xml的JAR
            ExtensionDescriptor descriptor = loadDescriptor(artifact);
            // 注冊(cè)自定義生命周期組件
            registerComponents(descriptor.getComponents());
            // 合并自定義生命周期定義
            mergeLifecycles(descriptor.getLifecycles());
        }
    }
}

<!-- pom.xml -->
<build>
    <plugins>
        <plugin>
            <artifactId>maven-plugin-plugin</artifactId>
            <extensions>true</extensions>
        </plugin>
    </plugins>
</build>

<extension>
    <components>
        <component>
            <role>org.apache.maven.lifecycle.Lifecycle</role>
            <implementation>com.example.ParallelLifecycle</implementation>
        </component>
    </components>
</extension>

public class ParallelLifecycle extends Lifecycle {
    public ParallelLifecycle() {
        super("parallel", Arrays.asList(
            new Phase("parallel-compile", 
                Collections.singletonList("com.example:parallel-compiler-plugin:compile")),
            new Phase("parallel-test")
        ));
    }
}

<lifecycles xmlns="http://maven.apache.org/LIFECYCLES_1_0_0"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://maven.apache.org/LIFECYCLES_1_0_0 
            http://maven.apache.org/xsd/lifecycles-1.0.0.xsd">
    
    <lifecycle>
        <id>custom</id>
        <phases>
            <phase>
                <id>pre-integration</id>
                <executions>
                    <execution>
                        <goals>
                            <goal>prepare</goal>
                        </goals>
                        <plugin>
                            <groupId>com.example</groupId>
                            <artifactId>integration-plugin</artifactId>
                        </plugin>
                    </execution>
                </executions>
            </phase>
            <!-- 更多階段定義 -->
        </phases>
    </lifecycle>
</lifecycles>

<phase>
    <id>post-deploy</id>
    <executions>
        <execution>
            <goals>
                <goal>scan</goal>
            </goals>
            <configuration>
                <target>production</target>
            </configuration>
            <plugin>
                <groupId>com.security</groupId>
                <artifactId>vulnerability-scanner</artifactId>
            </plugin>
        </execution>
    </executions>
</phase>

<pluginGroups>
    <pluginGroup>com.example.lifecycle</pluginGroup>
</pluginGroups>

<profiles>
    <profile>
        <id>prod</id>
        <build>
            <plugins>
                <plugin>
                    <groupId>com.security</groupId>
                    <artifactId>vulnerability-scanner</artifactId>
                    <executions>
                        <execution>
                            <phase>post-deploy</phase>
                            <goals>
                                <goal>full-scan</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </profile>
</profiles>

<mojo>
    <goal>deploy-check</goal>
    <phase>post-deploy</phase>
    <requiresDependencyResolution>runtime</requiresDependencyResolution>
    <implementation>com.example.DeployCheckerMojo</implementation>
</mojo>

<plugin>
    <groupId>com.example</groupId>
    <artifactId>os-specific-plugin</artifactId>
    <executions>
        <execution>
            <phase>post-deploy</phase>
            <goals>
                <goal>linux-deploy</goal>
            </goals>
            <configuration>
                <os>linux</os>
            </configuration>
            <conditions>
                <os>
                    <family>unix</family>
                </os>
            </conditions>
        </execution>
        <execution>
            <phase>post-deploy</phase>
            <goals>
                <goal>windows-deploy</goal>
            </goals>
            <conditions>
                <os>
                    <family>windows</family>
                </os>
            </conditions>
        </execution>
    </executions>
</plugin>

@Mojo(name = "validate")
public class ValidationMojo extends AbstractMojo {
    @Parameter(property = "threshold", required = true)
    private int threshold;
    
    public void execute() throws MojoExecutionException {
        if (threshold < 0) {
            throw new MojoExecutionException("Invalid threshold value");
        }
    }
}

// 通過(guò)Session傳遞數(shù)據(jù)
getPluginContext().put("build.timestamp", new Date());

// 其他插件獲取
Date timestamp = (Date) getPluginContext().get("build.timestamp");

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-antrun-plugin</artifactId>
            <executions>
                <execution>
                    <id>notify-jira</id>
                    <phase>post-deploy</phase>
                    <goals><goal>run</goal></goals>
                    <configuration>
                        <target>
                            <taskdef name="jira" 
                                classname="com.atlassian.jira.ant.JiraTask"/>
                            <jira .../>
                        </target>
                    </configuration>
                </execution>
                <execution>
                    <id>send-email</id>
                    <phase>post-deploy</phase>
                    <goals><goal>run</goal></goals>
                    <configuration>
                        <target>
                            <mail .../>
                        </target>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

<!-- lifecycle.xml -->
<lifecycle>
    <id>security</id>
    <phases>
        <phase name="pre-commit"/>
        <phase name="security-scan"/>
        <phase name="compliance-report"/>
    </phases>
</lifecycle>

<plugin>
    <groupId>com.sec</groupId>
    <artifactId>security-scanner</artifactId>
    <executions>
        <execution>
            <phase>security-scan</phase>
            <goals>
                <goal>full-scan</goal>
            </goals>
        </execution>
    </executions>
</plugin>

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-invoker-plugin</artifactId>
    <executions>
        <execution>
            <phase>compliance-report</phase>
            <goals>
                <goal>run</goal>
            </goals>
            <configuration>
                <parallelThreads>4</parallelThreads>
                <projectsDirectory>compliance-tests</projectsDirectory>
            </configuration>
        </execution>
    </executions>
</plugin>