feign.hystrix.SetterFactory Maven / Gradle / Ivy
/*
* Copyright © 2012 The Feign Authors ([email protected])
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package feign.hystrix;
import com.netflix.hystrix.HystrixCommand;
import com.netflix.hystrix.HystrixCommandGroupKey;
import com.netflix.hystrix.HystrixCommandKey;
import feign.Feign;
import feign.Target;
import java.lang.reflect.Method;
/**
* Used to control properties of a hystrix command. Use cases include reading from static
* configuration or custom annotations.
*
* This is parsed up-front, like {@link feign.Contract}, so will not be invoked for each command
* invocation.
*
*
Note: when deciding the {@link
* com.netflix.hystrix.HystrixCommand.Setter#andCommandKey(HystrixCommandKey) command key}, recall
* it lives in a shared cache, so make sure it is unique.
*/
public interface SetterFactory {
/** Returns a hystrix setter appropriate for the given target and method */
HystrixCommand.Setter create(Target target, Method method);
/**
* Default behavior is to derive the group key from {@link Target#name()} and the command key from
* {@link Feign#configKey(Class, Method)}.
*/
final class Default implements SetterFactory {
@Override
public HystrixCommand.Setter create(Target target, Method method) {
String groupKey = target.name();
String commandKey = Feign.configKey(target.type(), method);
return HystrixCommand.Setter.withGroupKey(HystrixCommandGroupKey.Factory.asKey(groupKey))
.andCommandKey(HystrixCommandKey.Factory.asKey(commandKey));
}
}
}