forked from elastic/apm-agent-go
/
err.go
54 lines (48 loc) · 1.58 KB
/
err.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. 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 transporttest // import "github.com/waldiirawan/apm-agent-go/v2/transport/transporttest"
import (
"context"
"io"
"io/ioutil"
"github.com/waldiirawan/apm-agent-go/v2/transport"
)
// Discard is a transport.Transport which discards
// all streams, and returns no errors.
var Discard transport.Transport = ErrorTransport{}
// ErrorTransport is a transport that returns the stored error
// for each method call.
type ErrorTransport struct {
Error error
}
// SendStream discards the stream and returns t.Error.
func (t ErrorTransport) SendStream(ctx context.Context, r io.Reader) error {
errc := make(chan error, 1)
go func() {
_, err := io.Copy(ioutil.Discard, r)
errc <- err
}()
select {
case err := <-errc:
if err != nil {
return err
}
return t.Error
case <-ctx.Done():
return ctx.Err()
}
}