/**
 * Copyright (c) 2018-2028, DreamLu 卢春梦 ([email protected]).
 * <p>
 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE 3.0;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.gnu.org/licenses/lgpl.html
 * <p>
 * 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 org.springblade.core.cloud.feign;

import feign.Target;
import feign.hystrix.FallbackFactory;
import lombok.AllArgsConstructor;
import org.springframework.cglib.proxy.Enhancer;

/**
 * 默认 Fallback，避免写过多fallback类
 *
 * @param <T> 泛型标记
 * @author L.cm
 */
@AllArgsConstructor
public class BladeFallbackFactory<T> implements FallbackFactory<T> {
	private final Target<T> target;

	@Override
	@SuppressWarnings("unchecked")
	public T create(Throwable cause) {
		final Class<T> targetType = target.type();
		final String targetName = target.name();
		Enhancer enhancer = new Enhancer();
		enhancer.setSuperclass(targetType);
		enhancer.setUseCache(true);
		enhancer.setCallback(new BladeFeignFallback<>(targetType, targetName, cause));
		return (T) enhancer.create();
	}
}