0%

name相同问题

name相同问题

在使用@FeignClient的时候,发现多个@FeignClient中的name相同就无法启动,当然了,这是因为bean名称重复了,创建bean的时候报的错,但是如何解决呢?

可以配置不同的contextId来进行解决

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
@FeignClient(name = "SPRINGCLOUD2-PROVIDER",contextId = "DeptClient",fallbackFactory = DeptClientFallBackFactory.class)
public interface DeptClient {

@GetMapping(value = "/dept/get/{id}")
CommonResult<Dept> get(@PathVariable("id") long id);

@GetMapping("/timeout")
String timeout();
}


@FeignClient(name = "SPRINGCLOUD2-PROVIDER",contextId = "DeptClient1",fallbackFactory = DeptClientFallBackFactory.class)
public interface DeptClient1 {

@GetMapping(value = "/dept/get/{id}")
CommonResult<Dept> get(@PathVariable("id") long id);

@GetMapping("/timeout")
String timeout();
}

为什么可以这样解决呢?

在FeignClientsRegistrar中进行@FeignClient注册时,对于bean的名称是调用getClientName(Map<String, Object> client)方法来获取的

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
private String getClientName(Map<String, Object> client) {
if (client == null) {
return null;
}
String value = (String) client.get("contextId");
if (!StringUtils.hasText(value)) {
value = (String) client.get("value");
}
if (!StringUtils.hasText(value)) {
value = (String) client.get("name");
}
if (!StringUtils.hasText(value)) {
value = (String) client.get("serviceId");
}
if (StringUtils.hasText(value)) {
return value;
}

throw new IllegalStateException("Either 'name' or 'value' must be provided in @"
+ FeignClient.class.getSimpleName());
}

代码也比较简单,可以看到是先获取的contextId,如果配置了 contextId 就会用 contextId,如果没有配置就会去 value 然后是 name 最后是 serviceId