Java 自更新Spring启动应用程序
我想做的是编写一个自更新的SpringBoot2.2.5应用程序 我编写了一个带有RESTController的springbootstarterweb应用程序来控制更新过程(我知道REST路径没有正确设置,例如/update/update…) 该过程应如下所示:Java 自更新Spring启动应用程序,java,spring-boot,auto-update,Java,Spring Boot,Auto Update,我想做的是编写一个自更新的SpringBoot2.2.5应用程序 我编写了一个带有RESTController的springbootstarterweb应用程序来控制更新过程(我知道REST路径没有正确设置,例如/update/update…) 该过程应如下所示: 从应用程序库中使用自传的OpenJDK启动Spring引导应用程序 检查服务器()上是否有可用的更新 将更新下载到本地目录,并将所有文件解压缩到临时的“更新目录”。() 关闭Spring启动应用程序,包括JVM() 修改应用程序文件夹
@SpringBootApplication
public class SelfupdateApplication {
public static void main(String[] args) {
SpringApplication.run(SelfupdateApplication.class, args);
}
public static void update() {
try {
SelfupdateApplication.restartApplication(null);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Sun property pointing the main class and its arguments. Might not be defined
* on non Hotspot VM implementations.
*/
public static final String SUN_JAVA_COMMAND = "sun.java.command";
/**
* Restart the current Java application
*
* @param runBeforeRestart some custom code to be run before restarting
* @throws IOException
*/
public static void restartApplication(Runnable runBeforeRestart) throws IOException {
try {
// java binary
String java = System.getProperty("java.home") + "/bin/java";
System.out.println("Java-Home: " + java);
// vm arguments
List<String> vmArguments = ManagementFactory.getRuntimeMXBean().getInputArguments();
StringBuffer vmArgsOneLine = new StringBuffer();
for (String arg : vmArguments) {
// if it's the agent argument : we ignore it otherwise the
// address of the old application and the new one will be in conflict
if (!arg.contains("-agentlib")) {
vmArgsOneLine.append(arg);
vmArgsOneLine.append(" ");
}
}
// init the command to execute, add the vm args
final StringBuffer cmd = new StringBuffer("\"" + java + "\" " + vmArgsOneLine);
// program main and program arguments
String[] mainCommand = System.getProperty(SUN_JAVA_COMMAND).split(" ");
// program main is a jar
if (mainCommand[0].endsWith(".jar")) {
// if it's a jar, add -jar mainJar
cmd.append("-jar " + new File(mainCommand[0]).getPath());
} else {
// else it's a .class, add the classpath and mainClass
cmd.append("-cp \"" + System.getProperty("java.class.path") + "\" " + mainCommand[0]);
}
// finally add program arguments
for (int i = 1; i < mainCommand.length; i++) {
cmd.append(" ");
cmd.append(mainCommand[i]);
}
// execute the command in a shutdown hook, to be sure that all the
// resources have been disposed before restarting the application
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
try {
Runtime.getRuntime().exec(cmd.toString());
} catch (IOException e) {
e.printStackTrace();
}
}
});
// execute some custom code before restarting
if (runBeforeRestart != null) {
runBeforeRestart.run();
}
// exit
System.exit(0);
} catch (Exception e) {
// something went wrong
throw new IOException("Error while trying to restart the application", e);
}
}
}
@RestController
@RequestMapping("/update")
public class UpdateController {
@GetMapping("/download")
public boolean download() {
File currentDir = new File(System.getProperty("user.dir"));
File destDir = new File(currentDir.getAbsolutePath() + File.separator + "update_lib");
File downloadDir = new File("C:/temp/selfupdate/someServer/update");
try {
FileUtils.copyDirectory(downloadDir, destDir);
} catch (IOException e) {
e.printStackTrace();
return false;
}
return true;
}
@GetMapping("/check")
public void check() {
// not relevant for now
SomeHelper.checkForUpdate();
}
@GetMapping("/update")
public void update() {
SelfupdateApplication.update();
}
@GetMapping("/restart")
public void restart() {
try {
SelfupdateApplication.restartApplication(null);
} catch (IOException e) {
e.printStackTrace();
}
}
@GetMapping("/alive")
public String alive() {
return "Yes i am still here ;-)";
}
@GetMapping("/shutdown")
public String shutdown() {
Thread thread = new Thread() {
public void run() {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.exit(0);
}
};
thread.start();
return "System shutdown initiated";
}
@GetMapping("/version")
public String version() {
return "0.0.1";
}
}