Lab 11

Steps and Files

1. Environment variable
2. getJavaVersion()
3. Test

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Lab#11 Configuration with Environment interface

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In this lab we will read configurations with Environment interface in the accounts microservice e.g. JAVA_HOME

1. Environment variable

Step #1 Add an Environment variable to AccountController class

import org.springframework.core.env.Environment;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.annotation.Validated;
import jakarta.validation.Valid;

@RestController
@RequestMapping(path = "/api", produces = MediaType.APPLICATION_JSON_VALUE)
//@AllArgsConstructor
@Validated
public class AccountController {


    private IAccountsService iAccountsService;

    @Value("${build.version}")
    private String buildVersion;

    @Autowired
    private Environment environment;

    @Value
    public AccountController(IAccountsService iAccountsService) {
        this.iAccountsService = iAccountsService;
    }

2. getJavaVersion()

Step #2 Build a REST API to read the property and return to user. In the AccountController

getJavaVersion()

    @GetMapping("/java-version")
    public ResponseEntity<String> getJavaVersion() {
        return ResponseEntity.status(HttpStatus.OK).body(environment.getProperty("JAVA_HOME"));
    }

3. Test

Step #3 Test using Postman