feat support restart application api.

src/main/java/run/halo/app/Application.java

@@ -1,9 +1,11 @@
 package run.halo.app;
 
+import org.springframework.boot.ApplicationArguments;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
 import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
 import org.springframework.scheduling.annotation.EnableAsync;
@@ -25,12 +27,29 @@ import run.halo.app.repository.base.BaseRepositoryImpl;
 @EnableJpaRepositories(basePackages = "run.halo.app.repository", repositoryBaseClass = BaseRepositoryImpl.class)
 public class Application extends SpringBootServletInitializer {
 
+    private static ConfigurableApplicationContext context;
+
     public static void main(String[] args) {
         // Customize the spring config location
         System.setProperty("spring.config.additional-location", "file:${user.home}/.halo/,file:${user.home}/halo-dev/");
 
         // Run application
-        SpringApplication.run(Application.class, args);
+        context = SpringApplication.run(Application.class, args);
+    }
+
+    /**
+     * Restart Application.
+     */
+    public static void restart() {
+        ApplicationArguments args = context.getBean(ApplicationArguments.class);
+
+        Thread thread = new Thread(() -> {
+            context.close();
+            context = SpringApplication.run(Application.class, args.getSourceArgs());
+        });
+
+        thread.setDaemon(false);
+        thread.start();
     }
 
     @Override

src/main/java/run/halo/app/controller/admin/api/AdminController.java

@@ -4,6 +4,7 @@ import io.swagger.annotations.ApiOperation;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.*;
+import run.halo.app.Application;
 import run.halo.app.cache.lock.CacheLock;
 import run.halo.app.model.dto.EnvironmentDTO;
 import run.halo.app.model.dto.StatisticDTO;
@@ -100,9 +101,20 @@ public class AdminController {
         adminService.updateAdminAssets();
     }
 
-    @GetMapping("spring/logs")
-    @ApiOperation("Get application logs")
-    public BaseResponse<String> getSpringLogs() {
-        return BaseResponse.ok(HttpStatus.OK.getReasonPhrase(), adminService.getSpringLogs());
+    @GetMapping("spring/application.yaml")
+    @ApiOperation("Get application config content")
+    public BaseResponse<String> getSpringApplicationConfig() {
+        return BaseResponse.ok(HttpStatus.OK.getReasonPhrase(), adminService.getApplicationConfig());
+    }
+
+    @PutMapping("spring/application.yaml/update")
+    @ApiOperation("Update application config content")
+    public void updateSpringApplicationConfig(@RequestParam(name = "content") String content) {
+        adminService.updateApplicationConfig(content);
+    }
+
+    @PostMapping("/spring/restart")
+    public void restartApplication() {
+        Application.restart();
     }
 }

src/main/java/run/halo/app/service/AdminService.java

@@ -23,7 +23,7 @@ public interface AdminService {
 
     int REFRESH_TOKEN_EXPIRED_DAYS = 30;
 
-    String LOGS_PATH = "logs/spring.log";
+    String APPLICATION_CONFIG_NAME = "application.yaml";
 
     /**
      * Authenticates.
@@ -84,9 +84,16 @@ public interface AdminService {
     void updateAdminAssets();
 
     /**
-     * Get spring logs.
+     * Get application.yaml content.
      *
-     * @return recently logs.
+     * @return application.yaml content
      */
-    String getSpringLogs();
+    String getApplicationConfig();
+
+    /**
+     * Save application.yaml content.
+     *
+     * @param content new content
+     */
+    void updateApplicationConfig(String content);
 }

src/main/java/run/halo/app/service/impl/AdminServiceImpl.java

@@ -40,6 +40,8 @@ import run.halo.app.utils.HaloUtils;
 import java.io.File;
 import java.io.IOException;
 import java.lang.management.ManagementFactory;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.List;
@@ -443,12 +445,22 @@ public class AdminServiceImpl implements AdminService {
     }
 
     @Override
-    public String getSpringLogs() {
-        File file = new File(haloProperties.getWorkDir(), LOGS_PATH);
+    public String getApplicationConfig() {
+        File file = new File(haloProperties.getWorkDir(), APPLICATION_CONFIG_NAME);
         if (!file.exists()) {
-            return "暂无日志";
+            return "";
         }
         FileReader reader = new FileReader(file);
         return reader.readString();
     }
+
+    @Override
+    public void updateApplicationConfig(String content) {
+        Path path = Paths.get(haloProperties.getWorkDir(), APPLICATION_CONFIG_NAME);
+        try {
+            Files.write(path, content.getBytes(StandardCharsets.UTF_8));
+        } catch (IOException e) {
+            throw new ServiceException("保存配置文件失败", e);
+        }
+    }
 }