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vendor: Remove unused packages.

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Harshavardhana 8 years ago
parent 7de206cb85
commit 8828fd1e5c
8 changed files with 0 additions and 717 deletions
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  1. 380
      vendor/github.com/facebookgo/httpdown/httpdown.go
  2. 30
      vendor/github.com/facebookgo/httpdown/license
  3. 33
      vendor/github.com/facebookgo/httpdown/patents
  4. 41
      vendor/github.com/facebookgo/httpdown/readme.md
  5. 30
      vendor/github.com/facebookgo/stats/license
  6. 33
      vendor/github.com/facebookgo/stats/patents
  7. 4
      vendor/github.com/facebookgo/stats/readme.md
  8. 166
      vendor/github.com/facebookgo/stats/stats.go

380
vendor/github.com/facebookgo/httpdown/httpdown.go generated vendored
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@ -1,380 +0,0 @@
// Package httpdown provides http.ConnState enabled graceful termination of
// http.Server.
package httpdown
import (
"crypto/tls"
"fmt"
"log"
"net"
"net/http"
"os"
"os/signal"
"sync"
"syscall"
"time"
"github.com/facebookgo/clock"
"github.com/facebookgo/stats"
)
const (
defaultStopTimeout = time.Minute
defaultKillTimeout = time.Minute
)
// A Server allows encapsulates the process of accepting new connections and
// serving them, and gracefully shutting down the listener without dropping
// active connections.
type Server interface {
// Wait waits for the serving loop to finish. This will happen when Stop is
// called, at which point it returns no error, or if there is an error in the
// serving loop. You must call Wait after calling Serve or ListenAndServe.
Wait() error
// Stop stops the listener. It will block until all connections have been
// closed.
Stop() error
}
// HTTP defines the configuration for serving a http.Server. Multiple calls to
// Serve or ListenAndServe can be made on the same HTTP instance. The default
// timeouts of 1 minute each result in a maximum of 2 minutes before a Stop()
// returns.
type HTTP struct {
// StopTimeout is the duration before we begin force closing connections.
// Defaults to 1 minute.
StopTimeout time.Duration
// KillTimeout is the duration before which we completely give up and abort
// even though we still have connected clients. This is useful when a large
// number of client connections exist and closing them can take a long time.
// Note, this is in addition to the StopTimeout. Defaults to 1 minute.
KillTimeout time.Duration
// Stats is optional. If provided, it will be used to record various metrics.
Stats stats.Client
// Clock allows for testing timing related functionality. Do not specify this
// in production code.
Clock clock.Clock
}
// Serve provides the low-level API which is useful if you're creating your own
// net.Listener.
func (h HTTP) Serve(s *http.Server, l net.Listener) Server {
stopTimeout := h.StopTimeout
if stopTimeout == 0 {
stopTimeout = defaultStopTimeout
}
killTimeout := h.KillTimeout
if killTimeout == 0 {
killTimeout = defaultKillTimeout
}
klock := h.Clock
if klock == nil {
klock = clock.New()
}
ss := &server{
stopTimeout: stopTimeout,
killTimeout: killTimeout,
stats: h.Stats,
clock: klock,
oldConnState: s.ConnState,
listener: l,
server: s,
serveDone: make(chan struct{}),
serveErr: make(chan error, 1),
new: make(chan net.Conn),
active: make(chan net.Conn),
idle: make(chan net.Conn),
closed: make(chan net.Conn),
stop: make(chan chan struct{}),
kill: make(chan chan struct{}),
}
s.ConnState = ss.connState
go ss.manage()
go ss.serve()
return ss
}
// ListenAndServe returns a Server for the given http.Server. It is equivalent
// to ListenAndServe from the standard library, but returns immediately.
// Requests will be accepted in a background goroutine. If the http.Server has
// a non-nil TLSConfig, a TLS enabled listener will be setup.
func (h HTTP) ListenAndServe(s *http.Server) (Server, error) {
addr := s.Addr
if addr == "" {
if s.TLSConfig == nil {
addr = ":http"
} else {
addr = ":https"
}
}
l, err := net.Listen("tcp", addr)
if err != nil {
stats.BumpSum(h.Stats, "listen.error", 1)
return nil, err
}
if s.TLSConfig != nil {
l = tls.NewListener(l, s.TLSConfig)
}
return h.Serve(s, l), nil
}
// server manages the serving process and allows for gracefully stopping it.
type server struct {
stopTimeout time.Duration
killTimeout time.Duration
stats stats.Client
clock clock.Clock
oldConnState func(net.Conn, http.ConnState)
server *http.Server
serveDone chan struct{}
serveErr chan error
listener net.Listener
new chan net.Conn
active chan net.Conn
idle chan net.Conn
closed chan net.Conn
stop chan chan struct{}
kill chan chan struct{}
stopOnce sync.Once
stopErr error
}
func (s *server) connState(c net.Conn, cs http.ConnState) {
if s.oldConnState != nil {
s.oldConnState(c, cs)
}
switch cs {
case http.StateNew:
s.new <- c
case http.StateActive:
s.active <- c
case http.StateIdle:
s.idle <- c
case http.StateHijacked, http.StateClosed:
s.closed <- c
}
}
func (s *server) manage() {
defer func() {
close(s.new)
close(s.active)
close(s.idle)
close(s.closed)
close(s.stop)
close(s.kill)
}()
var stopDone chan struct{}
conns := map[net.Conn]http.ConnState{}
var countNew, countActive, countIdle float64
// decConn decrements the count associated with the current state of the
// given connection.
decConn := func(c net.Conn) {
switch conns[c] {
default:
panic(fmt.Errorf("unknown existing connection: %s", c))
case http.StateNew:
countNew--
case http.StateActive:
countActive--
case http.StateIdle:
countIdle--
}
}
// setup a ticker to report various values every minute. if we don't have a
// Stats implementation provided, we Stop it so it never ticks.
statsTicker := s.clock.Ticker(time.Minute)
if s.stats == nil {
statsTicker.Stop()
}
for {
select {
case <-statsTicker.C:
// we'll only get here when s.stats is not nil
s.stats.BumpAvg("http-state.new", countNew)
s.stats.BumpAvg("http-state.active", countActive)
s.stats.BumpAvg("http-state.idle", countIdle)
s.stats.BumpAvg("http-state.total", countNew+countActive+countIdle)
case c := <-s.new:
conns[c] = http.StateNew
countNew++
case c := <-s.active:
decConn(c)
countActive++
conns[c] = http.StateActive
case c := <-s.idle:
decConn(c)
countIdle++
conns[c] = http.StateIdle
// if we're already stopping, close it
if stopDone != nil {
c.Close()
}
case c := <-s.closed:
stats.BumpSum(s.stats, "conn.closed", 1)
decConn(c)
delete(conns, c)
// if we're waiting to stop and are all empty, we just closed the last
// connection and we're done.
if stopDone != nil && len(conns) == 0 {
close(stopDone)
return
}
case stopDone = <-s.stop:
// if we're already all empty, we're already done
if len(conns) == 0 {
close(stopDone)
return
}
// close current idle connections right away
for c, cs := range conns {
if cs == http.StateIdle {
c.Close()
}
}
// continue the loop and wait for all the ConnState updates which will
// eventually close(stopDone) and return from this goroutine.
case killDone := <-s.kill:
// force close all connections
stats.BumpSum(s.stats, "kill.conn.count", float64(len(conns)))
for c := range conns {
c.Close()
}
// don't block the kill.
close(killDone)
// continue the loop and we wait for all the ConnState updates and will
// return from this goroutine when we're all done. otherwise we'll try to
// send those ConnState updates on closed channels.
}
}
}
func (s *server) serve() {
stats.BumpSum(s.stats, "serve", 1)
s.serveErr <- s.server.Serve(s.listener)
close(s.serveDone)
close(s.serveErr)
}
func (s *server) Wait() error {
if err := <-s.serveErr; !isUseOfClosedError(err) {
return err
}
return nil
}
func (s *server) Stop() error {
s.stopOnce.Do(func() {
defer stats.BumpTime(s.stats, "stop.time").End()
stats.BumpSum(s.stats, "stop", 1)
// first disable keep-alive for new connections
s.server.SetKeepAlivesEnabled(false)
// then close the listener so new connections can't connect come thru
closeErr := s.listener.Close()
<-s.serveDone
// then trigger the background goroutine to stop and wait for it
stopDone := make(chan struct{})
s.stop <- stopDone
// wait for stop
select {
case <-stopDone:
case <-s.clock.After(s.stopTimeout):
defer stats.BumpTime(s.stats, "kill.time").End()
stats.BumpSum(s.stats, "kill", 1)
// stop timed out, wait for kill
killDone := make(chan struct{})
s.kill <- killDone
select {
case <-killDone:
case <-s.clock.After(s.killTimeout):
// kill timed out, give up
stats.BumpSum(s.stats, "kill.timeout", 1)
}
}
if closeErr != nil && !isUseOfClosedError(closeErr) {
stats.BumpSum(s.stats, "listener.close.error", 1)
s.stopErr = closeErr
}
})
return s.stopErr
}
func isUseOfClosedError(err error) bool {
if err == nil {
return false
}
if opErr, ok := err.(*net.OpError); ok {
err = opErr.Err
}
return err.Error() == "use of closed network connection"
}
// ListenAndServe is a convenience function to serve and wait for a SIGTERM
// or SIGINT before shutting down.
func ListenAndServe(s *http.Server, hd *HTTP) error {
if hd == nil {
hd = &HTTP{}
}
hs, err := hd.ListenAndServe(s)
if err != nil {
return err
}
log.Printf("serving on http://%s/ with pid %d\n", s.Addr, os.Getpid())
waiterr := make(chan error, 1)
go func() {
defer close(waiterr)
waiterr <- hs.Wait()
}()
signals := make(chan os.Signal, 10)
signal.Notify(signals, syscall.SIGTERM, syscall.SIGINT)
select {
case err := <-waiterr:
if err != nil {
return err
}
case s := <-signals:
signal.Stop(signals)
log.Printf("signal received: %s\n", s)
if err := hs.Stop(); err != nil {
return err
}
if err := <-waiterr; err != nil {
return err
}
}
log.Println("exiting")
return nil
}

30
vendor/github.com/facebookgo/httpdown/license generated vendored
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@ -1,30 +0,0 @@
BSD License
For httpdown software
Copyright (c) 2015, Facebook, Inc. All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name Facebook nor the names of its contributors may be used to
endorse or promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

33
vendor/github.com/facebookgo/httpdown/patents generated vendored
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@ -1,33 +0,0 @@
Additional Grant of Patent Rights Version 2
"Software" means the httpdown software distributed by Facebook, Inc.
Facebook, Inc. ("Facebook") hereby grants to each recipient of the Software
("you") a perpetual, worldwide, royalty-free, non-exclusive, irrevocable
(subject to the termination provision below) license under any Necessary
Claims, to make, have made, use, sell, offer to sell, import, and otherwise
transfer the Software. For avoidance of doubt, no license is granted under
Facebook’s rights in any patent claims that are infringed by (i) modifications
to the Software made by you or any third party or (ii) the Software in
combination with any software or other technology.
The license granted hereunder will terminate, automatically and without notice,
if you (or any of your subsidiaries, corporate affiliates or agents) initiate
directly or indirectly, or take a direct financial interest in, any Patent
Assertion: (i) against Facebook or any of its subsidiaries or corporate
affiliates, (ii) against any party if such Patent Assertion arises in whole or
in part from any software, technology, product or service of Facebook or any of
its subsidiaries or corporate affiliates, or (iii) against any party relating
to the Software. Notwithstanding the foregoing, if Facebook or any of its
subsidiaries or corporate affiliates files a lawsuit alleging patent
infringement against you in the first instance, and you respond by filing a
patent infringement counterclaim in that lawsuit against that party that is
unrelated to the Software, the license granted hereunder will not terminate
under section (i) of this paragraph due to such counterclaim.
A "Necessary Claim" is a claim of a patent owned by Facebook that is
necessarily infringed by the Software standing alone.
A "Patent Assertion" is any lawsuit or other action alleging direct, indirect,
or contributory infringement or inducement to infringe any patent, including a
cross-claim or counterclaim.

41
vendor/github.com/facebookgo/httpdown/readme.md generated vendored
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@ -1,41 +0,0 @@
httpdown [![Build Status](https://secure.travis-ci.org/facebookgo/httpdown.png)](https://travis-ci.org/facebookgo/httpdown)
========
Documentation: https://godoc.org/github.com/facebookgo/httpdown
Package httpdown provides a library that makes it easy to build a HTTP server
that can be shutdown gracefully (that is, without dropping any connections).
If you want graceful restart and not just graceful shutdown, look at the
[grace](https://github.com/facebookgo/grace) package which uses this package
underneath but also provides graceful restart.
Usage
-----
Demo HTTP Server with graceful termination:
https://github.com/facebookgo/httpdown/blob/master/httpdown_example/main.go
1. Install the demo application
go get github.com/facebookgo/httpdown/httpdown_example
1. Start it in the first terminal
httpdown_example
This will output something like:
2014/11/18 21:57:50 serving on http://127.0.0.1:8080/ with pid 17
1. In a second terminal start a slow HTTP request
curl 'http://localhost:8080/?duration=20s'
1. In a third terminal trigger a graceful shutdown (using the pid from your output):
kill -TERM 17
This will demonstrate that the slow request was served before the server was
shutdown. You could also have used `Ctrl-C` instead of `kill` as the example
application triggers graceful shutdown on TERM or INT signals.

30
vendor/github.com/facebookgo/stats/license generated vendored
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@ -1,30 +0,0 @@
BSD License
For stats software
Copyright (c) 2015, Facebook, Inc. All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name Facebook nor the names of its contributors may be used to
endorse or promote products derived from this software without specific
prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

33
vendor/github.com/facebookgo/stats/patents generated vendored
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@ -1,33 +0,0 @@
Additional Grant of Patent Rights Version 2
"Software" means the stats software distributed by Facebook, Inc.
Facebook, Inc. ("Facebook") hereby grants to each recipient of the Software
("you") a perpetual, worldwide, royalty-free, non-exclusive, irrevocable
(subject to the termination provision below) license under any Necessary
Claims, to make, have made, use, sell, offer to sell, import, and otherwise
transfer the Software. For avoidance of doubt, no license is granted under
Facebook’s rights in any patent claims that are infringed by (i) modifications
to the Software made by you or any third party or (ii) the Software in
combination with any software or other technology.
The license granted hereunder will terminate, automatically and without notice,
if you (or any of your subsidiaries, corporate affiliates or agents) initiate
directly or indirectly, or take a direct financial interest in, any Patent
Assertion: (i) against Facebook or any of its subsidiaries or corporate
affiliates, (ii) against any party if such Patent Assertion arises in whole or
in part from any software, technology, product or service of Facebook or any of
its subsidiaries or corporate affiliates, or (iii) against any party relating
to the Software. Notwithstanding the foregoing, if Facebook or any of its
subsidiaries or corporate affiliates files a lawsuit alleging patent
infringement against you in the first instance, and you respond by filing a
patent infringement counterclaim in that lawsuit against that party that is
unrelated to the Software, the license granted hereunder will not terminate
under section (i) of this paragraph due to such counterclaim.
A "Necessary Claim" is a claim of a patent owned by Facebook that is
necessarily infringed by the Software standing alone.
A "Patent Assertion" is any lawsuit or other action alleging direct, indirect,
or contributory infringement or inducement to infringe any patent, including a
cross-claim or counterclaim.

4
vendor/github.com/facebookgo/stats/readme.md generated vendored
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@ -1,4 +0,0 @@
stats [![Build Status](https://secure.travis-ci.org/facebookgo/stats.png)](https://travis-ci.org/facebookgo/stats)
=====
Documentation: https://godoc.org/github.com/facebookgo/stats

166
vendor/github.com/facebookgo/stats/stats.go generated vendored
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// Package stats defines a lightweight interface for collecting statistics. It
// doesn't provide an implementation, just the shared interface.
package stats
// Client provides methods to collection statistics.
type Client interface {
// BumpAvg bumps the average for the given key.
BumpAvg(key string, val float64)
// BumpSum bumps the sum for the given key.
BumpSum(key string, val float64)
// BumpHistogram bumps the histogram for the given key.
BumpHistogram(key string, val float64)
// BumpTime is a special version of BumpHistogram which is specialized for
// timers. Calling it starts the timer, and it returns a value on which End()
// can be called to indicate finishing the timer. A convenient way of
// recording the duration of a function is calling it like such at the top of
// the function:
//
// defer s.BumpTime("my.function").End()
BumpTime(key string) interface {
End()
}
}
// PrefixClient adds multiple keys for the same value, with each prefix
// added to the key and calls the underlying client.
func PrefixClient(prefixes []string, client Client) Client {
return &prefixClient{
Prefixes: prefixes,
Client: client,
}
}
type prefixClient struct {
Prefixes []string
Client Client
}
func (p *prefixClient) BumpAvg(key string, val float64) {
for _, prefix := range p.Prefixes {
p.Client.BumpAvg(prefix+key, val)
}
}
func (p *prefixClient) BumpSum(key string, val float64) {
for _, prefix := range p.Prefixes {
p.Client.BumpSum(prefix+key, val)
}
}
func (p *prefixClient) BumpHistogram(key string, val float64) {
for _, prefix := range p.Prefixes {
p.Client.BumpHistogram(prefix+key, val)
}
}
func (p *prefixClient) BumpTime(key string) interface {
End()
} {
var m multiEnder
for _, prefix := range p.Prefixes {
m = append(m, p.Client.BumpTime(prefix+key))
}
return m
}
// multiEnder combines many enders together.
type multiEnder []interface {
End()
}
func (m multiEnder) End() {
for _, e := range m {
e.End()
}
}
// HookClient is useful for testing. It provides optional hooks for each
// expected method in the interface, which if provided will be called. If a
// hook is not provided, it will be ignored.
type HookClient struct {
BumpAvgHook func(key string, val float64)
BumpSumHook func(key string, val float64)
BumpHistogramHook func(key string, val float64)
BumpTimeHook func(key string) interface {
End()
}
}
// BumpAvg will call BumpAvgHook if defined.
func (c *HookClient) BumpAvg(key string, val float64) {
if c.BumpAvgHook != nil {
c.BumpAvgHook(key, val)
}
}
// BumpSum will call BumpSumHook if defined.
func (c *HookClient) BumpSum(key string, val float64) {
if c.BumpSumHook != nil {
c.BumpSumHook(key, val)
}
}
// BumpHistogram will call BumpHistogramHook if defined.
func (c *HookClient) BumpHistogram(key string, val float64) {
if c.BumpHistogramHook != nil {
c.BumpHistogramHook(key, val)
}
}
// BumpTime will call BumpTimeHook if defined.
func (c *HookClient) BumpTime(key string) interface {
End()
} {
if c.BumpTimeHook != nil {
return c.BumpTimeHook(key)
}
return NoOpEnd
}
type noOpEnd struct{}
func (n noOpEnd) End() {}
// NoOpEnd provides a dummy value for use in tests as valid return value for
// BumpTime().
var NoOpEnd = noOpEnd{}
// BumpAvg calls BumpAvg on the Client if it isn't nil. This is useful when a
// component has an optional stats.Client.
func BumpAvg(c Client, key string, val float64) {
if c != nil {
c.BumpAvg(key, val)
}
}
// BumpSum calls BumpSum on the Client if it isn't nil. This is useful when a
// component has an optional stats.Client.
func BumpSum(c Client, key string, val float64) {
if c != nil {
c.BumpSum(key, val)
}
}
// BumpHistogram calls BumpHistogram on the Client if it isn't nil. This is
// useful when a component has an optional stats.Client.
func BumpHistogram(c Client, key string, val float64) {
if c != nil {
c.BumpHistogram(key, val)
}
}
// BumpTime calls BumpTime on the Client if it isn't nil. If the Client is nil
// it still returns a valid return value which will be a no-op. This is useful
// when a component has an optional stats.Client.
func BumpTime(c Client, key string) interface {
End()
} {
if c != nil {
return c.BumpTime(key)
}
return NoOpEnd
}
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