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favorites_wrapper.go
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/
favorites_wrapper.go
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 wrappers
import (
"context"
"github.com/pkg/errors"
"github.com/afex/hystrix-go/hystrix"
"github.com/micro/go-micro/v2/client"
)
// 后续改成 sentinel
type favoriteWrapper struct {
client.Client
}
func (wrapper *favoriteWrapper) Call(ctx context.Context, req client.Request, resp interface{}, opts ...client.CallOption) error {
cmdName := req.Service() + "." + req.Endpoint()
config := hystrix.CommandConfig{
Timeout: 30000,
RequestVolumeThreshold: 20, // 熔断器请求阈值,默认20,意思是有20个请求才能进行错误百分比计算
ErrorPercentThreshold: 50, // 错误百分比,当错误超过百分比时,直接进行降级处理,直至熔断器再次 开启,默认50%
SleepWindow: 5000, // 过多长时间,熔断器再次检测是否开启,单位毫秒ms(默认5秒)
}
hystrix.ConfigureCommand(cmdName, config)
err := hystrix.Do(cmdName, func() error {
return wrapper.Client.Call(ctx, req, resp)
}, func(err error) error {
return err
})
return errors.Wrap(err, "call error")
}
func NewFavoriteWrapper(c client.Client) client.Client {
return &favoriteWrapper{c}
}