[英]How to setup a FF4j RegionFlippingStrategy based on RestController path parameters?
I've just started using FF4j to switch between 2 different API implementations depending on which market the user is on (market = brand/country pair).我刚刚开始使用 FF4j 在 2 个不同的 API 实现之间切换,具体取决于用户所在的市场(市场 = 品牌/国家对)。 Here is the code snippet:这是代码片段:
@RestController
@RequestMapping("/{brand}/{country}")
public class HomeController {
private final ApiService apiService;
public HomeController(@Qualifier("new-api") ApiService apiService) {
this.apiService = apiService;
}
@GetMapping("/hey")
public String hey(@PathVariable("brand") String brand,
@PathVariable("country") String country) {
return apiService.whichApi();
}
}
interface ApiService {
@Flip(name = "legacy-api", alterBean = "legacy-api")
String whichApi();
}
@Component("new-api")
class NewApiApiService implements ApiService {
@Override
public String whichApi() {
return "NEW_API";
}
}
@Component("legacy-api")
class LegacyApiApiService implements ApiService {
@Override
public String whichApi() {
return "LEGACY_API";
}
}
I created a RegionFlippingStrategy
( as the doc says ) to define for which market
I want to use the legacy-api
, but I cannot make it work.我创建了一个RegionFlippingStrategy
(如文档所述)来定义我想使用legacy-api
的market
,但我无法使其工作。
How can I register my new strategy into FF4j?如何将我的新策略注册到 FF4j?
How can I switch between API dynamically based on the home controller brand/country
inputs?如何根据家庭 controller brand/country
输入在 API 之间动态切换?
How can I register my new strategy into FF4j?如何将我的新策略注册到 FF4j?
Let's remind the strategy code让我们提醒一下策略代码
public class MarketFlippingStrategy extends AbstractFlipStrategy {
private final Set<String> setOfGrantedMarket = new HashSet<String>();
@Override
public void init(String featureName, Map<String, String> initValue) {
super.init(featureName, initValue);
assertRequiredParameter("grantedMarket");
String[] arrayOfRegions = initValue.get("grantedMarket").split(",");
setOfGrantedRegions.addAll(Arrays.asList(arrayOfRegions));
}
@Override
public boolean evaluate(String fName, FeatureStore fStore, FlippingExecutionContext ctx) {
return setOfGrantedRegions.contains(ctx.getString("market", true));
}
}
The FlipStrategy
should be registered in the definition of the feature legacy-api
: FlipStrategy
应该在功能legacy-api
的定义中注册:
xml
, yaml
or properties
.您可以在文件中执行此操作并使用控制台 ff4j 现在支持xml
、 yaml
或properties
导入。With the following definition the feature will be enabled only for the granted markets:使用以下定义,该功能将仅对授权市场启用:
<?xml version="1.0" encoding="UTF-8" ?>
<features>
<feature uid="legacy-api" enable="true" >
<flipstrategy class="org.ff4j.sample.strategy.MarketFlippingStrategy" >
<param name="grantedMarket">country1-brand1,country1-brand2</param>
</flipstrategy>
</feature>
</features>
How can I switch between API dynamically based on the home controller brand/country inputs?如何根据家庭 controller 品牌/国家输入在 API 之间动态切换?
The "trick" to is pass the couple brand/country as a single variable market
in the FlippingExecutionContext
and this would help you to understand but here how it works. “诀窍”是在FlippingExecutionContext
中将夫妇品牌/国家作为单个变量market
传递, 这将帮助您理解它是如何工作的。
@RestController
@RequestMapping("/{brand}/{country}")
public class HomeController {
private final ApiService apiService;
public HomeController(@Qualifier("new-api") ApiService apiService) {
this.apiService = apiService;
}
@GetMapping("/hey")
public String hey(@PathVariable("brand") String brand,
@PathVariable("country") String country) {
FlippingExecutionContext executionContext = new FlippingExecutionContext();
executionContext.putString("market", brand + "-" + country);
return apiService.whichApi(executionContext);
}
}
interface ApiService {
@Flip(name = "legacy-api",
alterBean = "legacy-api",
flippingStrategy = MarketFlippingStrategy.class,
contextLocation = ContextLocation.PARAMETER)
String whichApi(FlippingExecutionContext context);
}
@Component("new-api")
class NewApiApiService implements ApiService {
@Override
public String whichApi(FlippingExecutionContext context) {
return "NEW_API";
}
}
@Component("legacy-api")
class LegacyApiApiService implements ApiService {
@Override
public String whichApi(FlippingExecutionContext context) {
return "LEGACY_API";
}
}
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