mirror of
https://github.com/TheWhiteDog9487/WebAPI.git
synced 2026-08-11 23:01:30 +08:00
systemd服务自动管理来啦！
应该也许可能大概说不准没啥毛病吧，AI和我都反复审查过，有问题再说！ 干就完了！
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@@ -23,7 +23,7 @@ class OpenAPIConfiguration {
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.contact(new Contact()
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.name("TheWhiteDog9487")
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.url("https://www.github.com/TheWhiteDog9487/WebAPI"))
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.version("0.4.4")
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.version("0.5.0")
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.license(new License()
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.name("WTFPL")
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.url("https://spdx.org/licenses/WTFPL")) )
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@@ -0,0 +1,161 @@
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package xyz.thewhitedog9487.WebAPI.Startup;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.boot.CommandLineRunner;
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import org.springframework.stereotype.Component;
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import java.lang.reflect.InvocationTargetException;
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import java.net.URISyntaxException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.List;
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@Slf4j
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@Component
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class SystemdInstallerManager implements CommandLineRunner {
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static String TemplateContent = """
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[Unit]
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Description=WebAPI
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After=network.target
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[Service]
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User=%s
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WorkingDirectory=%s
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ExecStart=%s
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Restart=always
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Type=simple
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[Install]
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WantedBy=multi-user.target
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""";
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String CurrentOS = System.getProperty("os.name");
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String CurrentUser = System.getProperty("user.name");
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Path CurrentExecutableFilePath = GetExecutblePath();
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Path WorkingDirectory = CurrentExecutableFilePath.getParent();
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Path ServiceFileDirectory = Path.of("/etc/systemd/system/");
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Path ServiceFileName = Path.of("WebAPI.service");
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String SoftLinkFileName = "Current";
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Path SymbolicLinkPath = WorkingDirectory.resolve(SoftLinkFileName);
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/**
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* 检测当前运行环境是否为GraalVM生成的Native Image
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*/
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boolean IsImageCode(){
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try {
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return (boolean) Class.forName("org.graalvm.nativeimage.ImageInfo")
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.getMethod("inImageCode")
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.invoke(null);
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} catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException | ClassNotFoundException e) {
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return false; } }
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/**
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* 获取当前可执行文件的路径。
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* <br>
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* 如果是通过GraalVM生成的Native Image，则返回可执行文件的路径
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* <br>
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* 如果是直接用JRE运行的JAR包，则返回JAR文件的路径
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*/
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Path GetExecutblePath(){
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try {
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var IsImageCode = IsImageCode();
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log.debug("IsImageCode: {}", IsImageCode);
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if( IsImageCode == true ){
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Object ExecutablePath = Class.forName("org.graalvm.nativeimage.ProcessProperties")
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.getMethod("getExecutableName")
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.invoke(null);
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log.debug("ExecutablePath: {}", ExecutablePath);
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return Path.of((String) ExecutablePath); }
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else{
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log.debug("IsImageCode is false");
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// ↓ 没有错误，但是获取Jar包位置的代码在catch里面，扔一个异常出去以进入catch分支
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// ↓ 这个主要是针对使用GraalVM的JVM而不是Native Image的情况
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throw new RuntimeException("Not Image Code"); }
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} catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException | ClassNotFoundException |
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RuntimeException e) {
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try {
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return Path.of(SystemdInstallerManager.class
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.getProtectionDomain()
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.getCodeSource()
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.getLocation()
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.toURI()
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.getPath());
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} catch (URISyntaxException ex) {
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throw new RuntimeException(ex);}}}
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@Override
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public void run(String... args) throws Exception {
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for (String Argument : args) {
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if ( List.of("install", "--install").contains(Argument) == true ) {
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/*
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在Native Image / Jar文件旁边生成指向自身的，名为Current的软连接
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然后在软连接旁生成systemd服务文件，执行目标指向软连接
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*/
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log.info("开始安装systemd服务");
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log.debug("SystemProperties.os.name: {}", CurrentOS);
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if ( CurrentOS.startsWith("Linux") ) {
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log.debug("SystemProperties.user.name: {}", CurrentUser);
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if (CurrentUser.equals("root") == false) {
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log.error("只有root才有权在系统层级安装systemd服务，但是JVM报告的当前用户是{}", CurrentUser);
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throw new IllegalStateException("请使用root用户运行此命令以安装为systemd服务"); }
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log.debug("CurrentExecutableFilePath: {}", CurrentExecutableFilePath);
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log.debug("WorkingDirectory: {}", WorkingDirectory);
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log.debug("SymbolicLinkPath: {}", SymbolicLinkPath);
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Files.deleteIfExists(SymbolicLinkPath);
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Files.createSymbolicLink(SymbolicLinkPath, CurrentExecutableFilePath);
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log.info("成功创建指向当前程序的软链接: {} -> {}", SymbolicLinkPath, CurrentExecutableFilePath);
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Path CurrentJavaPath = null;
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var IsImageCode = IsImageCode();
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if ( IsImageCode == false ) {
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CurrentJavaPath = Path.of("/proc/self/exe").toRealPath();
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log.debug("CurrentJavaPath: {}", CurrentJavaPath); }
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var ExecCommand = (IsImageCode == true) ?
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SymbolicLinkPath.toString() :
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CurrentJavaPath + " -jar " + SymbolicLinkPath.toString();
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log.debug("ExecCommand: {}", ExecCommand);
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var ServiceFileContent = String.format(
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TemplateContent,
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CurrentUser,
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WorkingDirectory,
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ExecCommand);
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log.debug("ServiceFileContent: \n{}", ServiceFileContent);
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Files.deleteIfExists( WorkingDirectory.resolve(ServiceFileName) );
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Files.writeString(WorkingDirectory.resolve(ServiceFileName), ServiceFileContent);
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log.info("成功创建systemd服务文件: {}", WorkingDirectory.resolve(ServiceFileName));
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Files.deleteIfExists( ServiceFileDirectory.resolve(ServiceFileName) );
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Files.createSymbolicLink(ServiceFileDirectory.resolve(ServiceFileName), WorkingDirectory.resolve(ServiceFileName));
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log.info("成功创建指向服务文件的软链接: {} -> {}", ServiceFileDirectory.resolve(ServiceFileName), WorkingDirectory.resolve(ServiceFileName));
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new ProcessBuilder("systemctl", "daemon-reload").start().waitFor();
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log.info("已完成systemd守护进程重载");
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new ProcessBuilder("systemctl", "enable", ServiceFileName.toString()).start().waitFor();
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log.info("已启用systemd服务: {}", ServiceFileName);
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new ProcessBuilder("systemctl", "start", ServiceFileName.toString()).start().waitFor();
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log.info("已启动systemd服务: {}", ServiceFileName); }
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else if ( CurrentOS.startsWith("Windows") ) {
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log.error("只有Linux才能使用systemd，但是JVM报告的当前系统是{}", CurrentOS);
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throw new IllegalStateException("Windows系统不支持systemd服务管理，暂不支持在Windows上自动管理服务。"); }
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System.exit(0);
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}
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else if ( List.of("uninstall", "--uninstall").contains(Argument) == true ) {
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log.info("开始卸载systemd服务");
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log.debug("SystemProperties.os.name: {}", CurrentOS);
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if ( CurrentOS.startsWith("Windows") ) {
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log.error("只有Linux才能使用systemd，但是JVM报告的当前系统是{}", CurrentOS);
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throw new IllegalStateException("Windows系统不支持systemd服务管理，暂不支持在Windows上自动管理服务。"); }
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else if ( CurrentOS.startsWith("Linux") ) {
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if (CurrentUser.equals("root") == false) {
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log.error("只有root才有权在系统层级卸载systemd服务，但是JVM报告的当前用户是{}", CurrentUser);
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throw new IllegalStateException("请使用root用户运行此命令以卸载systemd服务"); }
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new ProcessBuilder("systemctl", "stop", ServiceFileName.toString()).start().waitFor();
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log.info("已停止systemd服务: {}", ServiceFileName);
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new ProcessBuilder("systemctl", "disable", ServiceFileName.toString()).start().waitFor();
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log.info("已禁用systemd服务: {}", ServiceFileName);
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Files.deleteIfExists(ServiceFileDirectory.resolve(ServiceFileName));
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log.info("成功删除systemd服务文件: {}", ServiceFileDirectory.resolve(ServiceFileName));
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Files.deleteIfExists(WorkingDirectory.resolve(ServiceFileName));
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log.info("成功删除程序旁的服务文件: {}", WorkingDirectory.resolve(ServiceFileName));
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Files.deleteIfExists(SymbolicLinkPath);
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log.info("成功删除指向程序自身的软链接: {}", SymbolicLinkPath);
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new ProcessBuilder("systemctl", "daemon-reload").start().waitFor();
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log.info("已完成systemd守护进程重载"); }
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System.exit(0); } } } }
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