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failure.go
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failure.go
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// Copyright 2021 CloudWeGo Authors
//
// 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 failure
import (
"context"
"errors"
"time"
"github.com/bytedance/gopkg/cloud/metainfo"
"github.com/cloudwego/kitex/pkg/endpoint"
"github.com/cloudwego/kitex/pkg/kerrors"
"github.com/cloudwego/kitex/pkg/klog"
"github.com/cloudwego/kitex/pkg/retry"
)
func NewDelayMW(delay time.Duration) endpoint.Middleware {
return func(next endpoint.Endpoint) endpoint.Endpoint {
return func(ctx context.Context, req, resp interface{}) (err error) {
if _, exist := metainfo.GetPersistentValue(ctx, retry.TransitKey); !exist {
time.Sleep(delay + 10*time.Millisecond)
return next(ctx, req, resp)
}
klog.Infof("this is a retry request")
return next(ctx, req, resp)
}
}
}
func NewFailureMW() endpoint.Middleware {
return func(next endpoint.Endpoint) endpoint.Endpoint {
return func(ctx context.Context, req, resp interface{}) (err error) {
if _, exist := metainfo.GetPersistentValue(ctx, retry.TransitKey); !exist {
return kerrors.ErrRPCTimeout.WithCause(errors.New("you shall not pass"))
}
klog.Infof("this is a retry request")
return next(ctx, req, resp)
}
}
}