DHorse 打包原理
- 2022-12-13 浙江
本文字数：4241 字
阅读完需：约 14 分钟
插件打包
这种方式是平时最常用的，首先要下载并安装 maven 环境，然后在被打包的项目中引入插件，有各种各样的打包插件，比如 springboot 自带插件：
<plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <version>2.5.6</version> <configuration> <classifier>execute</classifier> <mainClass>com.test.Application</mainClass> </configuration> <executions> <execution> <goals> <goal>repackage</goal> </goals> </execution> </executions></plugin>
复制代码
再比如，通用的打包插件：
<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-assembly-plugin</artifactId> <version>3.8.2</version> <configuration> <appendAssemblyId>false</appendAssemblyId> <descriptors> <descriptor>src/main/resources/assemble.xml</descriptor> </descriptors> <outputDirectory>../target</outputDirectory> </configuration> <executions> <execution> <id>make-assembly</id> <phase>package</phase> <goals> <goal>single</goal> </goals> </execution> </executions></plugin>
复制代码
等等。然后再通过运行mvn clean package命令进行打包。
DHorse的技术选型
在《DHorse系列文章之镜像制作》这篇文章里已经说过，DHorse作为一个简单易用的 DevOps 开发平台，在一开始设计时就考虑到了对外部环境的依赖性。无论是从安装还是从使用的角度，都应该尽量减少对外部环境的依赖。同样，打包时也应该去除对 maven 环境的依赖。那么，如何实现呢？可以使用嵌入式 maven 插件 maven-embedder 来实现，首先在平台项目里引入依赖，如下：
<dependency> <groupId>org.apache.maven</groupId> <artifactId>maven-embedder</artifactId> <version>3.8.1</version></dependency><dependency> <groupId>org.apache.maven</groupId> <artifactId>maven-compat</artifactId> <version>3.8.1</version></dependency><dependency> <groupId>org.apache.maven.resolver</groupId> <artifactId>maven-resolver-connector-basic</artifactId> <version>1.7.1</version></dependency><dependency> <groupId>org.apache.maven.resolver</groupId> <artifactId>maven-resolver-transport-http</artifactId> <version>1.7.1</version></dependency>
复制代码
运行如下代码，就可以对 hello 项目进行打包了：
String[] commands = new String[] { "clean", "package", "-Dmaven.test.skip" };String pomPath = "D:/hello/pom.xml";MavenCli cli = new MavenCli();try { cli.doMain(commands, pomPath, System.out, System.out);} catch (Exception e) { e.printStackTrace();}
复制代码
但是，一般情况下，我们通过 maven 的 settings 文件还会做一些配置，比如配置工作目录、nexus 私服地址、Jdk 版本、编码方式等等，如下：
<?xml version="1.0" encoding="UTF-8"?><settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd"> <localRepository>C:/m2/repository</localRepository> <profiles> <profile> <id>myNexus</id> <repositories> <repository> <id>nexus</id> <name>nexus</name> <url>https://repo.maven.apache.org/maven2</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </repository> </repositories> <pluginRepositories> <pluginRepository> <id>nexus</id> <name>nexus</name> <url>https://repo.maven.apache.org/maven2</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </pluginRepository> </pluginRepositories> </profile>
<profile> <id>java11</id> <activation> <activeByDefault>true</activeByDefault> <jdk>11</jdk> </activation> <properties> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target> <maven.compiler.compilerVersion>11</maven.compiler.compilerVersion> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.build.outputEncoding>UTF-8</project.build.outputEncoding> </properties> </profile> </profiles> <activeProfiles> <activeProfile>myNexus</activeProfile> </activeProfiles></settings>
复制代码
通过查看 MavenCli 类发现，doMain(CliRequest cliRequest)方法有比较丰富的参数，CliRequest 的代码如下：
package org.apache.maven.cli;
public class CliRequest{ String[] args;
CommandLine commandLine;
ClassWorld classWorld;
String workingDirectory;
File multiModuleProjectDirectory;
boolean debug;
boolean quiet;
boolean showErrors = true;
Properties userProperties = new Properties();
Properties systemProperties = new Properties();
MavenExecutionRequest request;
CliRequest( String[] args, ClassWorld classWorld ) { this.args = args; this.classWorld = classWorld; this.request = new DefaultMavenExecutionRequest(); }
public String[] getArgs() { return args; }
public CommandLine getCommandLine() { return commandLine; }
public ClassWorld getClassWorld() { return classWorld; }
public String getWorkingDirectory() { return workingDirectory; }
public File getMultiModuleProjectDirectory() { return multiModuleProjectDirectory; }
public boolean isDebug() { return debug; }
public boolean isQuiet() { return quiet; }
public boolean isShowErrors() { return showErrors; }
public Properties getUserProperties() { return userProperties; }
public Properties getSystemProperties() { return systemProperties; }
public MavenExecutionRequest getRequest() { return request; }
public void setUserProperties( Properties properties ) { this.userProperties.putAll( properties ); }}
复制代码
可以看出，这些参数非常丰富，也许可以满足我们的需求，但是 CliRequest 只有一个默认修饰符的构造方法，也就说只有位于 org.apache.maven.cli 包下的类才有访问 CliRequest 构造方法的权限，我们可以在平台项目里新建一个包 org.apache.maven.cli，然后再创建一个类（如：DefaultCliRequest）继承自 CliRequest，然后实现一个 public 的构造方法，就可以在任何包里使用该类了，如下代码：
package org.apache.maven.cli;
import org.codehaus.plexus.classworlds.ClassWorld;
public class DefaultCliRequest extends CliRequest{
public DefaultCliRequest(String[] args, ClassWorld classWorld) { super(args, classWorld); } public void setWorkingDirectory(String directory) { this.workingDirectory = directory; }}
复制代码
定义好参数类型 DefaultCliRequest 后，我们再来看看打包的代码：
public void doPackage() { String[] commands = new String[] { "clean", "package", "-Dmaven.test.skip" }; DefaultCliRequest request = new DefaultCliRequest(commands, null); request.setWorkingDirectory("D:/hello/pom.xml");
Repository repository = new Repository(); repository.setId("nexus"); repository.setName("nexus"); repository.setUrl("https://repo.maven.apache.org/maven2"); RepositoryPolicy policy = new RepositoryPolicy(); policy.setEnabled(true); policy.setUpdatePolicy("always"); policy.setChecksumPolicy("fail"); repository.setReleases(policy); repository.setSnapshots(policy);
String javaVesion = "11"; Profile profile = new Profile(); profile.setId("java11"); Activation activation = new Activation(); activation.setActiveByDefault(true); activation.setJdk(javaVesion); profile.setActivation(activation); profile.setRepositories(Arrays.asList(repository)); profile.setPluginRepositories(Arrays.asList(repository));
Properties properties = new Properties(); properties.put("java.home", "D:/java/jdk-11.0.16.2"); properties.put("java.version", javaVesion); properties.put("maven.compiler.source", javaVesion); properties.put("maven.compiler.target", javaVesion); properties.put("maven.compiler.compilerVersion", javaVesion); properties.put("project.build.sourceEncoding", "UTF-8"); properties.put("project.reporting.outputEncoding", "UTF-8"); profile.setProperties(properties); MavenExecutionRequest executionRequest = request.getRequest(); executionRequest.setProfiles(Arrays.asList(profile));
MavenCli cli = new MavenCli(); try { cli.doMain(request); } catch (Exception e) { e.printStackTrace(); }}
复制代码
如果需要设置其他参数，也可以通过以上参数自行添加。
划线
评论
复制
发布于: 刚刚阅读数: 4
我笑世人看不穿 2018-11-08 加入
还未添加个人简介
评论