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@ -163,12 +163,6 @@
packages = ["."] packages = ["."]
revision = "a7a4c189eb47ed33ce7b35f2880070a0c82a67d4" revision = "a7a4c189eb47ed33ce7b35f2880070a0c82a67d4"
[[projects]]
branch = "master"
name = "github.com/oxtoacart/bpool"
packages = ["."]
revision = "4e1c5567d7c2dd59fa4c7c83d34c2f3528b025d6"
[[projects]] [[projects]]
name = "github.com/pkg/errors" name = "github.com/pkg/errors"
packages = ["."] packages = ["."]
@ -262,6 +256,6 @@
[solve-meta] [solve-meta]
analyzer-name = "dep" analyzer-name = "dep"
analyzer-version = 1 analyzer-version = 1
inputs-digest = "d04763e300ad6a22378bfaa45be86202d02659a6d01426d781b3062dc5c4ff67" inputs-digest = "e36c7dd8cc83fc16b10af5a8e3cfd768a3da534480cff4e0384ca1f3b4d050f5"
solver-name = "gps-cdcl" solver-name = "gps-cdcl"
solver-version = 1 solver-version = 1

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vendor/github.com/oxtoacart/bpool/LICENSE generated vendored
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# bpool [![GoDoc](https://godoc.org/github.com/oxtoacart/bpool?status.png)](https://godoc.org/github.com/oxtoacart/bpool)
Package bpool implements leaky pools of byte arrays and Buffers as bounded channels.
It is based on the leaky buffer example from the Effective Go documentation: http://golang.org/doc/effective_go.html#leaky_buffer
bpool provides the following pool types:
* [bpool.BufferPool](https://godoc.org/github.com/oxtoacart/bpool#BufferPool)
which provides a fixed-size pool of
[bytes.Buffers](http://golang.org/pkg/bytes/#Buffer).
* [bpool.BytePool](https://godoc.org/github.com/oxtoacart/bpool#BytePool) which
provides a fixed-size pool of `[]byte` slices with a pre-set width (length).
* [bpool.SizedBufferPool](https://godoc.org/github.com/oxtoacart/bpool#SizedBufferPool),
which is an alternative to `bpool.BufferPool` that pre-sizes the capacity of
buffers issued from the pool and discards buffers that have grown too large
upon return.
A common use case for this package is to use buffers to execute HTML templates
against (via ExecuteTemplate) or encode JSON into (via json.NewEncoder). This
allows you to catch any rendering or marshalling errors prior to writing to a
`http.ResponseWriter`, which helps to avoid writing incomplete or malformed data
to the response.
## Install
`go get github.com/oxtoacart/bpool`
## Documentation
See [godoc.org](http://godoc.org/github.com/oxtoacart/bpool) or use `godoc github.com/oxtoacart/bpool`
## Example
Here's a quick example for using `bpool.BufferPool`. We create a pool of the
desired size, call the `Get()` method to obtain a buffer for use, and call
`Put(buf)` to return the buffer to the pool.
```go
var bufpool *bpool.BufferPool
func main() {
bufpool = bpool.NewBufferPool(48)
}
func someFunction() error {
// Get a buffer from the pool
buf := bufpool.Get()
...
...
...
// Return the buffer to the pool
bufpool.Put(buf)
return nil
}
```
## License
Apache 2.0 Licensed. See the LICENSE file for details.

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vendor/github.com/oxtoacart/bpool/bpool.go generated vendored
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/*
Package bpool implements leaky pools of byte arrays and Buffers as bounded
channels. It is based on the leaky buffer example from the Effective Go
documentation: http://golang.org/doc/effective_go.html#leaky_buffer
*/
package bpool

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vendor/github.com/oxtoacart/bpool/bufferpool.go generated vendored
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package bpool
import (
"bytes"
)
// BufferPool implements a pool of bytes.Buffers in the form of a bounded
// channel.
type BufferPool struct {
c chan *bytes.Buffer
}
// NewBufferPool creates a new BufferPool bounded to the given size.
func NewBufferPool(size int) (bp *BufferPool) {
return &BufferPool{
c: make(chan *bytes.Buffer, size),
}
}
// Get gets a Buffer from the BufferPool, or creates a new one if none are
// available in the pool.
func (bp *BufferPool) Get() (b *bytes.Buffer) {
select {
case b = <-bp.c:
// reuse existing buffer
default:
// create new buffer
b = bytes.NewBuffer([]byte{})
}
return
}
// Put returns the given Buffer to the BufferPool.
func (bp *BufferPool) Put(b *bytes.Buffer) {
b.Reset()
select {
case bp.c <- b:
default: // Discard the buffer if the pool is full.
}
}

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vendor/github.com/oxtoacart/bpool/bufferpool_test.go generated vendored
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package bpool
import (
"bytes"
"testing"
)
func TestBufferPool(t *testing.T) {
var size int = 4
bufPool := NewBufferPool(size)
// Test Get/Put
b := bufPool.Get()
bufPool.Put(b)
// Add some additional buffers beyond the pool size.
for i := 0; i < size*2; i++ {
bufPool.Put(bytes.NewBuffer([]byte{}))
}
// Close the channel so we can iterate over it.
close(bufPool.c)
// Check the size of the pool.
if len(bufPool.c) != size {
t.Fatalf("bufferpool size invalid: got %v want %v", len(bufPool.c), size)
}
}

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vendor/github.com/oxtoacart/bpool/bytepool.go generated vendored
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package bpool
// BytePool implements a leaky pool of []byte in the form of a bounded
// channel.
type BytePool struct {
c chan []byte
w int
}
// NewBytePool creates a new BytePool bounded to the given maxSize, with new
// byte arrays sized based on width.
func NewBytePool(maxSize int, width int) (bp *BytePool) {
return &BytePool{
c: make(chan []byte, maxSize),
w: width,
}
}
// Get gets a []byte from the BytePool, or creates a new one if none are
// available in the pool.
func (bp *BytePool) Get() (b []byte) {
select {
case b = <-bp.c:
// reuse existing buffer
default:
// create new buffer
b = make([]byte, bp.w)
}
return
}
// Put returns the given Buffer to the BytePool.
func (bp *BytePool) Put(b []byte) {
select {
case bp.c <- b:
// buffer went back into pool
default:
// buffer didn't go back into pool, just discard
}
}
// Width returns the width of the byte arrays in this pool.
func (bp *BytePool) Width() (n int) {
return bp.w
}

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package bpool
import "testing"
func TestBytePool(t *testing.T) {
var size int = 4
var width int = 10
bufPool := NewBytePool(size, width)
// Check the width
if bufPool.Width() != width {
t.Fatalf("bytepool width invalid: got %v want %v", bufPool.Width(), width)
}
// Check that retrieved buffer are of the expected width
b := bufPool.Get()
if len(b) != width {
t.Fatalf("bytepool length invalid: got %v want %v", len(b), width)
}
bufPool.Put(b)
// Fill the pool beyond the capped pool size.
for i := 0; i < size*2; i++ {
bufPool.Put(make([]byte, bufPool.w))
}
// Close the channel so we can iterate over it.
close(bufPool.c)
// Check the size of the pool.
if len(bufPool.c) != size {
t.Fatalf("bytepool size invalid: got %v want %v", len(bufPool.c), size)
}
}

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vendor/github.com/oxtoacart/bpool/sizedbufferpool.go generated vendored
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package bpool
import (
"bytes"
)
// SizedBufferPool implements a pool of bytes.Buffers in the form of a bounded
// channel. Buffers are pre-allocated to the requested size.
type SizedBufferPool struct {
c chan *bytes.Buffer
a int
}
// SizedBufferPool creates a new BufferPool bounded to the given size.
// size defines the number of buffers to be retained in the pool and alloc sets
// the initial capacity of new buffers to minimize calls to make().
//
// The value of alloc should seek to provide a buffer that is representative of
// most data written to the the buffer (i.e. 95th percentile) without being
// overly large (which will increase static memory consumption). You may wish to
// track the capacity of your last N buffers (i.e. using an []int) prior to
// returning them to the pool as input into calculating a suitable alloc value.
func NewSizedBufferPool(size int, alloc int) (bp *SizedBufferPool) {
return &SizedBufferPool{
c: make(chan *bytes.Buffer, size),
a: alloc,
}
}
// Get gets a Buffer from the SizedBufferPool, or creates a new one if none are
// available in the pool. Buffers have a pre-allocated capacity.
func (bp *SizedBufferPool) Get() (b *bytes.Buffer) {
select {
case b = <-bp.c:
// reuse existing buffer
default:
// create new buffer
b = bytes.NewBuffer(make([]byte, 0, bp.a))
}
return
}
// Put returns the given Buffer to the SizedBufferPool.
func (bp *SizedBufferPool) Put(b *bytes.Buffer) {
b.Reset()
// Release buffers over our maximum capacity and re-create a pre-sized
// buffer to replace it.
// Note that the cap(b.Bytes()) provides the capacity from the read off-set
// only, but as we've called b.Reset() the full capacity of the underlying
// byte slice is returned.
if cap(b.Bytes()) > bp.a {
b = bytes.NewBuffer(make([]byte, 0, bp.a))
}
select {
case bp.c <- b:
default: // Discard the buffer if the pool is full.
}
}

50
vendor/github.com/oxtoacart/bpool/sizedbufferpool_test.go generated vendored
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package bpool
import (
"bytes"
"testing"
)
// TestSizedBufferPool checks that over-sized buffers are released and that new
// buffers are created in their place.
func TestSizedBufferPool(t *testing.T) {
var size int = 4
var capacity int = 1024
bufPool := NewSizedBufferPool(size, capacity)
b := bufPool.Get()
// Check the cap before we use the buffer.
if cap(b.Bytes()) != capacity {
t.Fatalf("buffer capacity incorrect: got %v want %v", cap(b.Bytes()),
capacity)
}
// Grow the buffer beyond our capacity and return it to the pool
b.Grow(capacity * 3)
bufPool.Put(b)
// Add some additional buffers to fill up the pool.
for i := 0; i < size; i++ {
bufPool.Put(bytes.NewBuffer(make([]byte, 0, bufPool.a*2)))
}
// Check that oversized buffers are being replaced.
if len(bufPool.c) < size {
t.Fatalf("buffer pool too small: got %v want %v", len(bufPool.c), size)
}
// Close the channel so we can iterate over it.
close(bufPool.c)
// Check that there are buffers of the correct capacity in the pool.
for buffer := range bufPool.c {
if cap(buffer.Bytes()) != bufPool.a {
t.Fatalf("returned buffers wrong capacity: got %v want %v",
cap(buffer.Bytes()), capacity)
}
}
}