How to resolve the requested resource is not available error in spring boot which runs on tomcat server?

Question

I had successfully run my spring boot application in localhost.

But when I had run it from the CWP panel tomcat server, I am getting the error given below. How to resolve this error? Do I need anything else to run on a CWP panel tomcat server?

Steps which I had followed

1. Extends the SpringBootServletInitializer class in the main class.

   @SpringBootApplication
   public class GDriveAppJavaApplication extends SpringBootServletInitializer {
     @Override
     protected SpringApplicationBuilder configure( SpringApplicationBuilder builder) {
        return builder.sources(GDriveAppJavaApplication.class);
     }
    public static void main(String[] args) {
       SpringApplication.run(GDriveAppJavaApplication.class, args);
     }
   
   }
   

2. Update packaging JAR to WAR

3. Added Tomcat starter dependency with scope as provided

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
   

4. Application properties

    server.servlet.context-path=/GDriveAppJava
   

5. Generated war file(GDriveAppJava) and copied to webapps folder in the tomcat as shown below.

6. Controller file

   @RestController
   @AllArgsConstructor
   public class FileController {
   
      @Autowired
      private FileManager fileManager;
   
      @Autowired
      private FileRepository fileRepository;
   
      @PostMapping(value = "/upload/{user_id}")
      public ResponseEntity<FileEntity> uploadFIle(@RequestParam("file") MultipartFile file,@PathVariable String user_id){
          FileEntity updated = fileManager.uploadFile(file, user_id);
          return new ResponseEntity<FileEntity>(updated, HttpStatus.OK);
      }
   
      @GetMapping(path="/viewByUserId/{user_id}")
      public List<FileEntity> viewByUserid(@PathVariable String user_id) 
      {
           return fileRepository.findByUserId(user_id);
      }
   
      @GetMapping("/downloadFile/{file_id}")
      public void download(@PathVariable String file_id, HttpServletResponse response) throws IOException, GeneralSecurityException {
         fileManager.downloadFile(file_id, response.getOutputStream());
      }
   
      @GetMapping(path="/viewByFileId/{file_id}")
      public List<FileEntity> viewByFileId(@PathVariable String file_id) 
      {
         return fileRepository.findByFileId(file_id);
      }
   

   }

Application properties

spring.jpa.hibernate.ddl-auto=update
spring.datasource.url=jdbc:jdbc:mysql://${MYSQL_HOST:localhost}:3306/user123_gdriveapp
spring.datasource.username=user123//my server username
spring.datasource.password=password123//my server password
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
spring.jpa.show-sql: true


spring.servlet.multipart.max-file-size=100MB
spring.servlet.multipart.max-request-size=100MB

server.servlet.context-path=/GDriveAppJava







        

Answer 1

Step 1: You need to generate a war file and deploy it to the tomcat server. Referring to https://codezup.com/deploy-spring-boot-war-to-external-tomcat/ for generating war file.

Step 2: Search the war file to target folder. Then rename the war file. for example: gdapp.war. Then depoloy the .war file to the tomcat server.

Step 3: Access the application using the file name in the URL. example: gdapp/GDriveAppJava/...

Note: Make sure you have configured your database properly.