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39 lines
1012 B
Go
39 lines
1012 B
Go
/*
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Copyright 2016 The Go4 Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package readerutil
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import (
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"expvar"
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"fmt"
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"io"
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"io/ioutil"
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"strings"
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)
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func ExampleNewStatsReader() {
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var (
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// r is the io.Reader we'd like to count read from.
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r = strings.NewReader("Hello world")
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v = expvar.NewInt("read-bytes")
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sw = NewStatsReader(v, r)
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)
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// Read from the wrapped io.Reader, StatReader will count the bytes.
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io.Copy(ioutil.Discard, sw)
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fmt.Printf("Read %s bytes\n", v.String())
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// Output: Read 11 bytes
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}
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