Section 3: Integrate Microservices
Integration with other DIGIT services
A separate class should be created for integrating with each dependent microservice. Only one method from that class should be called from the main service class for integration.
In this guide, we will be showcasing how we can integrate our microservices with other microservices like MDMS, IdGen, User and Workflow.
For interacting with other microservices, we can create and implement the following
ServiceRequestRepository class under repository package -package digit.repository;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import lombok.extern.slf4j.Slf4j;
import org.egov.tracer.model.ServiceCallException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.web.client.HttpClientErrorException;
import org.springframework.web.client.RestTemplate;
import java.util.Map;
@Repository
@Slf4j
public class ServiceRequestRepository {
private ObjectMapper mapper;
private RestTemplate restTemplate;
@Autowired
public ServiceRequestRepository(ObjectMapper mapper, RestTemplate restTemplate) {
this.mapper = mapper;
this.restTemplate = restTemplate;
}
public Object fetchResult(StringBuilder uri, Object request) {
mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
Object response = null;
try {
response = restTemplate.postForObject(uri.toString(), request, Map.class);
}catch(HttpClientErrorException e) {
log.error("External Service threw an Exception: ",e);
throw new ServiceCallException(e.getResponseBodyAsString());
}catch(Exception e) {
log.error("Exception while fetching from searcher: ",e);
}
return response;
}
}
Last modified 2mo ago