feat: send request to visualization if getDriver is called

To satisfy project description

Each driver has a name, surname, nationality, and set of characteristics (e.g. driving on the wet, aggressiveness, etc..) that the manager can visualize.

core/src/main/java/cz/muni/pa165/service/DriverService.java

@@ -4,11 +4,20 @@ import cz.muni.pa165.data.model.Driver;
 import cz.muni.pa165.data.repository.DriverRepository;
 import cz.muni.pa165.exceptions.BadRequestException;
 import cz.muni.pa165.exceptions.ResourceNotFoundException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.client.RestClientException;
+import org.springframework.web.client.RestTemplate;
 
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
 
 /**
@@ -17,19 +26,35 @@ import java.util.Optional;
 @Service
 public class DriverService extends DomainService<Driver> {
 
+    private static final Logger log = LoggerFactory.getLogger(DriverService.class);
+
     private final DriverRepository driverRepository;
 
+    private final RestTemplate restTemplate;
+
+    private static final String VISUALIZATION_MODULE_URL = "http://localhost:8082/visualization";
+
     @Autowired
-    public DriverService(DriverRepository repository) {
+    public DriverService(DriverRepository repository, RestTemplate restTemplate) {
         super(repository, Driver.class);
         driverRepository = repository;
+        this.restTemplate = restTemplate;
     }
 
     @Transactional(readOnly = true)
     public Driver findById(Long id) {
-        return driverRepository.findById(id)
-                .orElseThrow(() ->
-                        new ResourceNotFoundException(entityClass, id));
+        Optional<Driver> dbDriver = driverRepository.findById(id);
+        if (dbDriver.isEmpty()) {
+            throw new ResourceNotFoundException(entityClass, id);
+        }
+
+        try {
+            sendPostRequest(dbDriver.get());
+        } catch (RestClientException | IllegalArgumentException e) {
+            log.debug(String.format("The visualization module is not reachable on the URL: %s", VISUALIZATION_MODULE_URL));
+        }
+
+        return dbDriver.get();
     }
 
     public Driver update(Long id, Driver driver) {
@@ -66,5 +91,17 @@ public class DriverService extends DomainService<Driver> {
 
         repository.delete(driverFromDb.get());
     }
+
+    private void sendPostRequest(Driver driver) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("data", driver.toString());
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.setContentType(MediaType.APPLICATION_JSON);
+        HttpEntity<Map<String, Object>> request = new HttpEntity<>(body, headers);
+        restTemplate.postForObject(VISUALIZATION_MODULE_URL, request, String.class);
+
+        log.debug(String.format("Sent request %s to %s.", request, VISUALIZATION_MODULE_URL));
+    }
 }