Mastering Microservices with Java - Third Edition

OpenFeign client implementation

OpenFeign client is another alternative that helps with executing the REST API calls. Its main advantage is that it removes the boilerplate code. Have a look at the code mentioned in step 3. It is sleek, readable, and contains less code compared to others.

It just needs a Java interface that has the REST API signatures—that's it. Then, you can use it. For each service, you can define a separate Feign interface. It works very well with Eureka. Use of OpenFeign requires the following steps:

1. First, you need to add a new dependency in the pom.xml file on booking-service, as shown in the following example:

<!-- OpenFeign client dependency --><dependency>  <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> ...