Fegin整合sentinel时出现SpringCloud和SpringCloudbaba版本冲突的问题。

报错信息为：Caused by: java.lang.AbstractMethodError:com.alibaba.cloud.sentinel.feign.SentinelContractHolder.parseAndValidateMetadata(Ljava/lang/Class;)Ljava/util/List;

解决方式：

找合适的位置自定义一个SentinelContractHolder类，包名和源码保持一致。

包名：package com.alibaba.cloud.sentinel.feign

代码如下：

package com.alibaba.cloud.sentinel.feign;

import feign.Contract;
import feign.MethodMetadata;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class SentinelContractHolder implements Contract {

    private final Contract delegate;
    public final static Map METADATA_MAP = new HashMap<>();

    public SentinelContractHolder(Contract delegate) {
        this.delegate = delegate;
    }

    @Override
    public List parseAndValidateMetadata(Class targetType) {
        List metadatas = delegate.parseAndValidateMetadata(targetType);
        metadatas.forEach(metadata -> METADATA_MAP
                .put(targetType.getName() + metadata.configKey(), metadata));
        return metadatas;
    }
}