Spring Boot Microservices communication using Rest Template - spring

Question

I am trying to implement to Rest Template to talk to another Microservice but it's not working properly, I am new to spring please help me complete this code.
#GetMapping("/name")
public Product name(){//#PathVariable String name){
RestTemplate restTemplate = new RestTemplate();
Product x = restTemplate.getForObject("http://localhost:8081/products", Product.class);
return x;
}
2021-03-18 10:31:34.072 ERROR 56434 --- [nio-8080-exec-2]
o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for
servlet [dispatcherServlet] in context with path [] threw exception
[Request processing failed; nested exception is
org.springframework.web.client.RestClientException: Error while
extracting response for type [class com.java.connect.entity.Product]
and content type [application/json]; nested exception is
org.springframework.http.converter.HttpMessageNotReadableException:
JSON parse error: Cannot deserialize instance of
com.java.connect.entity.Product out of START_ARRAY token; nested
exception is
com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot
deserialize instance of com.java.connect.entity.Product out of
START_ARRAY token
at [Source: (PushbackInputStream); line: 1, column: 1]] with root cause

Answer 1

You don't get a single Product but an array of Products.
So you have to use
ResponsEntity<Product[]> response = restTemplate.getForObject("http://localhost:8081/products", Product[].class);
Product[] products = response.getBody();
But I think this is not what you want and I assume that name would be a query parameter of the rest endpoint. So you have to pass name like this:
#GetMapping("/name")
public Product name(){#PathVariable String name){
RestTemplate restTemplate = new RestTemplate();
Product x = restTemplate.getForObject("http://localhost:8081/products?name=" + name, Product.class);
return x;
}

Answer 2

You need to make below changes to get list of products using RestTemplate.
ResponseEntity<Product[]> response =
restTemplate.getForEntity(
"http://localhost:8080/products/",
Product[].class);
Product [] products = response.getBody();