Close all connections.

This commit is contained in:
Vladimir Mihailenco 2013-11-07 16:20:15 +02:00
parent ab4d0d6b62
commit 3f491f8a8c
5 changed files with 294 additions and 240 deletions

9
v2/export_test.go Normal file
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@ -0,0 +1,9 @@
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package redis
func (c *baseClient) Pool() pool {
return c.connPool
}

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@ -2,18 +2,25 @@ package redis
import (
"container/list"
"errors"
"net"
"sync"
"time"
"github.com/golang/glog"
"github.com/vmihailenco/bufio"
)
var (
errPoolClosed = errors.New("attempt to use closed connection pool")
)
type pool interface {
Get() (*conn, bool, error)
Put(*conn) error
Remove(*conn) error
Len() int
Size() int
Close() error
}
@ -22,17 +29,27 @@ type pool interface {
type conn struct {
cn net.Conn
rd reader
inUse bool
usedAt time.Time
readTimeout, writeTimeout time.Duration
elem *list.Element
}
func newConnFunc(dial func() (net.Conn, error)) func() (*conn, error) {
return func() (*conn, error) {
netcn, err := dial()
if err != nil {
return nil, err
}
func newConn(netcn net.Conn) *conn {
cn := &conn{
cn: netcn,
}
cn.rd = bufio.NewReader(cn)
return cn
return cn, nil
}
}
func (cn *conn) Read(b []byte) (int, error) {
@ -60,22 +77,25 @@ func (cn *conn) Close() error {
//------------------------------------------------------------------------------
type connPool struct {
dial func() (net.Conn, error)
New func() (*conn, error)
cond *sync.Cond
conns *list.List
size, maxSize int
len int
maxSize int
idleTimeout time.Duration
closed bool
}
func newConnPool(
dial func() (net.Conn, error),
dial func() (*conn, error),
maxSize int,
idleTimeout time.Duration,
) *connPool {
return &connPool{
dial: dial,
New: dial,
cond: sync.NewCond(&sync.Mutex{}),
conns: list.New(),
@ -86,88 +106,130 @@ func newConnPool(
}
func (p *connPool) Get() (*conn, bool, error) {
defer p.cond.L.Unlock()
p.cond.L.Lock()
for p.conns.Len() == 0 && p.size >= p.maxSize {
p.cond.Wait()
if p.closed {
p.cond.L.Unlock()
return nil, false, errPoolClosed
}
if p.idleTimeout > 0 {
for e := p.conns.Front(); e != nil; e = e.Next() {
cn := e.Value.(*conn)
if cn.inUse {
break
}
if time.Since(cn.usedAt) > p.idleTimeout {
p.conns.Remove(e)
if err := p.Remove(cn); err != nil {
glog.Errorf("Remove failed: %s", err)
}
}
}
}
if p.conns.Len() == 0 {
rw, err := p.dial()
for p.conns.Len() >= p.maxSize && p.len == 0 {
p.cond.Wait()
}
if p.len > 0 {
elem := p.conns.Front()
cn := elem.Value.(*conn)
if cn.inUse {
panic("pool: precondition failed")
}
cn.inUse = true
p.conns.MoveToBack(elem)
p.len--
p.cond.L.Unlock()
return cn, false, nil
}
if p.conns.Len() < p.maxSize {
cn, err := p.New()
if err != nil {
p.cond.L.Unlock()
return nil, false, err
}
p.size++
return newConn(rw), true, nil
cn.inUse = true
cn.elem = p.conns.PushBack(cn)
p.cond.L.Unlock()
return cn, true, nil
}
elem := p.conns.Front()
p.conns.Remove(elem)
return elem.Value.(*conn), false, nil
panic("not reached")
}
func (p *connPool) Put(cn *conn) error {
if cn.rd.Buffered() != 0 {
panic("redis: attempt to put connection with buffered data")
}
p.cond.L.Lock()
if p.closed {
p.cond.L.Unlock()
return errPoolClosed
}
cn.inUse = false
cn.usedAt = time.Now()
p.conns.PushFront(cn)
p.conns.MoveToFront(cn.elem)
p.len++
p.cond.Signal()
p.cond.L.Unlock()
return nil
}
func (p *connPool) Remove(cn *conn) error {
var err error
func (p *connPool) Remove(cn *conn) (err error) {
p.cond.L.Lock()
if p.closed {
// Noop, connection is already closed.
p.cond.L.Unlock()
return nil
}
if cn != nil {
err = cn.Close()
}
p.cond.L.Lock()
p.size--
p.conns.Remove(cn.elem)
cn.elem = nil
p.cond.Signal()
p.cond.L.Unlock()
return err
}
// Returns number of idle connections.
func (p *connPool) Len() int {
defer p.cond.L.Unlock()
p.cond.L.Lock()
return p.len
}
// Returns size of the pool.
func (p *connPool) Size() int {
defer p.cond.L.Unlock()
p.cond.L.Lock()
return p.conns.Len()
}
func (p *connPool) Size() int {
defer p.cond.L.Unlock()
p.cond.L.Lock()
return p.size
}
func (p *connPool) Close() error {
defer p.cond.L.Unlock()
p.cond.L.Lock()
for e := p.conns.Front(); e != nil; e = e.Next() {
if err := e.Value.(*conn).Close(); err != nil {
return err
}
}
p.conns.Init()
p.size = 0
if p.closed {
return nil
}
p.closed = true
var retErr error
for e := p.conns.Front(); e != nil; e = e.Next() {
cn := e.Value.(*conn)
if err := cn.Close(); err != nil {
glog.Errorf("cn.Close failed: %s", err)
retErr = err
}
cn.elem = nil
}
p.conns = nil
return retErr
}
//------------------------------------------------------------------------------
@ -195,34 +257,33 @@ func (p *singleConnPool) Get() (*conn, bool, error) {
}
p.l.RUnlock()
defer p.l.Unlock()
p.l.Lock()
cn, isNew, err := p.pool.Get()
if err != nil {
p.l.Unlock()
return nil, false, err
}
p.cn = cn
p.l.Unlock()
return cn, isNew, nil
}
func (p *singleConnPool) Put(cn *conn) error {
defer p.l.Unlock()
p.l.Lock()
if p.cn != cn {
panic("p.cn != cn")
}
p.l.Unlock()
return nil
}
func (p *singleConnPool) Remove(cn *conn) error {
defer p.l.Unlock()
p.l.Lock()
if p.cn != cn {
panic("p.cn != cn")
}
p.cn = nil
p.l.Unlock()
return nil
}
@ -235,6 +296,15 @@ func (p *singleConnPool) Len() int {
return 1
}
func (p *singleConnPool) Size() int {
defer p.l.Unlock()
p.l.Lock()
if p.cn == nil {
return 0
}
return 1
}
func (p *singleConnPool) Close() error {
defer p.l.Unlock()
p.l.Lock()

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@ -5,6 +5,7 @@ import (
"time"
)
// Not thread-safe.
type PubSub struct {
*baseClient
}

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@ -113,7 +113,7 @@ func (c *baseClient) run(cmd Cmder) {
}
if err := c.writeCmd(cn, cmd); err != nil {
c.removeConn(cn)
c.freeConn(cn, err)
cmd.setErr(err)
return
}
@ -173,10 +173,7 @@ func newClient(opt *Options, dial func() (net.Conn, error)) *Client {
baseClient: &baseClient{
opt: opt,
connPool: newConnPool(
dial, opt.getPoolSize(),
opt.IdleTimeout,
),
connPool: newConnPool(newConnFunc(dial), opt.getPoolSize(), opt.IdleTimeout),
},
}
}

View File

@ -83,147 +83,141 @@ func (t *RedisConnectorTest) TestUnixConnector(c *C) {
//------------------------------------------------------------------------------
// type RedisConnPoolTest struct {
// dialedConns, closedConns int64
type RedisConnPoolTest struct {
client *redis.Client
}
// client *redis.Client
// }
var _ = Suite(&RedisConnPoolTest{})
// var _ = Suite(&RedisConnPoolTest{})
func (t *RedisConnPoolTest) SetUpTest(c *C) {
t.client = redis.NewTCPClient(&redis.Options{
Addr: redisAddr,
})
}
// func (t *RedisConnPoolTest) SetUpTest(c *C) {
// if t.client == nil {
// dial := func() (net.Conn, error) {
// t.dialedConns++
// return net.Dial("tcp", redisAddr)
// }
// close := func(conn net.Conn) error {
// t.closedConns++
// return nil
// }
func (t *RedisConnPoolTest) TearDownTest(c *C) {
c.Assert(t.client.FlushDb().Err(), IsNil)
c.Assert(t.client.Close(), IsNil)
}
// t.client = (&redis.ClientFactory{
// Dial: dial,
// Close: close,
// }).New()
// }
// }
func (t *RedisConnPoolTest) TestConnPoolMaxSize(c *C) {
wg := &sync.WaitGroup{}
for i := 0; i < 1000; i++ {
wg.Add(1)
go func() {
ping := t.client.Ping()
c.Assert(ping.Err(), IsNil)
c.Assert(ping.Val(), Equals, "PONG")
wg.Done()
}()
}
wg.Wait()
// func (t *RedisConnPoolTest) TearDownTest(c *C) {
// t.resetRedis(c)
// t.resetClient(c)
// }
c.Assert(t.client.Pool().Size(), Equals, 10)
c.Assert(t.client.Pool().Len(), Equals, 10)
}
// func (t *RedisConnPoolTest) resetRedis(c *C) {
// // This is much faster than Flushall.
// c.Assert(t.client.Select(1).Err(), IsNil)
// c.Assert(t.client.FlushDb().Err(), IsNil)
// c.Assert(t.client.Select(0).Err(), IsNil)
// c.Assert(t.client.FlushDb().Err(), IsNil)
// }
func (t *RedisConnPoolTest) TestConnPoolMaxSizeOnPipelineClient(c *C) {
const N = 1000
// func (t *RedisConnPoolTest) resetClient(c *C) {
// t.client.Close()
// c.Check(t.closedConns, Equals, t.dialedConns)
// t.dialedConns, t.closedConns = 0, 0
// }
wg := &sync.WaitGroup{}
wg.Add(N)
for i := 0; i < N; i++ {
go func() {
pipeline := t.client.Pipeline()
ping := pipeline.Ping()
cmds, err := pipeline.Exec()
c.Assert(err, IsNil)
c.Assert(cmds, HasLen, 1)
c.Assert(ping.Err(), IsNil)
c.Assert(ping.Val(), Equals, "PONG")
// func (t *RedisConnPoolTest) TestConnPoolMaxSize(c *C) {
// wg := &sync.WaitGroup{}
// for i := 0; i < 1000; i++ {
// wg.Add(1)
// go func() {
// ping := t.client.Ping()
// c.Assert(ping.Err(), IsNil)
// c.Assert(ping.Val(), Equals, "PONG")
// wg.Done()
// }()
// }
// wg.Wait()
c.Assert(pipeline.Close(), IsNil)
// c.Assert(t.client.Close(), IsNil)
// c.Assert(t.dialedConns, Equals, int64(10))
// c.Assert(t.closedConns, Equals, int64(10))
// }
wg.Done()
}()
}
wg.Wait()
// func (t *RedisConnPoolTest) TestConnPoolMaxSizeOnPipelineClient(c *C) {
// wg := &sync.WaitGroup{}
// for i := 0; i < 1000; i++ {
// wg.Add(1)
// go func() {
// pipeline, err := t.client.PipelineClient()
// c.Assert(err, IsNil)
c.Assert(t.client.Pool().Size(), Equals, 10)
c.Assert(t.client.Pool().Len(), Equals, 10)
}
// ping := pipeline.Ping()
// cmds, err := pipeline.RunQueued()
// c.Assert(err, IsNil)
// c.Assert(cmds, HasLen, 1)
// c.Assert(ping.Err(), IsNil)
// c.Assert(ping.Val(), Equals, "PONG")
func (t *RedisConnPoolTest) TestConnPoolMaxSizeOnMultiClient(c *C) {
const N = 1000
// c.Assert(pipeline.Close(), IsNil)
wg := &sync.WaitGroup{}
wg.Add(N)
for i := 0; i < N; i++ {
go func() {
multi := t.client.Multi()
var ping *redis.StatusCmd
cmds, err := multi.Exec(func() {
ping = multi.Ping()
})
c.Assert(err, IsNil)
c.Assert(cmds, HasLen, 1)
c.Assert(ping.Err(), IsNil)
c.Assert(ping.Val(), Equals, "PONG")
// wg.Done()
// }()
// }
// wg.Wait()
c.Assert(multi.Close(), IsNil)
// c.Assert(t.client.Close(), IsNil)
// c.Assert(t.dialedConns, Equals, int64(10))
// c.Assert(t.closedConns, Equals, int64(10))
// }
wg.Done()
}()
}
wg.Wait()
// func (t *RedisConnPoolTest) TestConnPoolMaxSizeOnMultiClient(c *C) {
// wg := &sync.WaitGroup{}
// for i := 0; i < 1000; i++ {
// wg.Add(1)
// go func() {
// multi, err := t.client.MultiClient()
// c.Assert(err, IsNil)
c.Assert(t.client.Pool().Size(), Equals, 10)
c.Assert(t.client.Pool().Len(), Equals, 10)
}
// var ping *redis.StatusCmd
// cmds, err := multi.Exec(func() {
// ping = multi.Ping()
// })
// c.Assert(err, IsNil)
// c.Assert(cmds, HasLen, 1)
// c.Assert(ping.Err(), IsNil)
// c.Assert(ping.Val(), Equals, "PONG")
func (t *RedisConnPoolTest) TestConnPoolMaxSizeOnPubSub(c *C) {
const N = 1000
// c.Assert(multi.Close(), IsNil)
wg := &sync.WaitGroup{}
wg.Add(N)
for i := 0; i < N; i++ {
go func() {
pubsub := t.client.PubSub()
c.Assert(pubsub.Subscribe(), IsNil)
c.Assert(pubsub.Close(), IsNil)
wg.Done()
}()
}
wg.Wait()
// wg.Done()
// }()
// }
// wg.Wait()
c.Assert(t.client.Pool().Size(), Equals, 0)
c.Assert(t.client.Pool().Len(), Equals, 0)
}
// c.Assert(t.client.Close(), IsNil)
// c.Assert(t.dialedConns, Equals, int64(10))
// c.Assert(t.closedConns, Equals, int64(10))
// }
func (t *RedisConnPoolTest) TestConnPoolRemovesBrokenConn(c *C) {
cn, _, err := t.client.Pool().Get()
c.Assert(err, IsNil)
c.Assert(cn.Close(), IsNil)
c.Assert(t.client.Pool().Put(cn), IsNil)
// func (t *RedisConnPoolTest) TestConnPoolMaxSizeOnPubSub(c *C) {
// wg := &sync.WaitGroup{}
// for i := 0; i < 1000; i++ {
// wg.Add(1)
// go func() {
// pubsub, err := t.client.PubSub()
// c.Assert(err, IsNil)
ping := t.client.Ping()
c.Assert(ping.Err().Error(), Equals, "use of closed network connection")
c.Assert(ping.Val(), Equals, "")
// _, err = pubsub.Subscribe()
// c.Assert(err, IsNil)
ping = t.client.Ping()
c.Assert(ping.Err(), IsNil)
c.Assert(ping.Val(), Equals, "PONG")
// c.Assert(pubsub.Close(), IsNil)
c.Assert(t.client.Pool().Size(), Equals, 1)
c.Assert(t.client.Pool().Len(), Equals, 1)
}
// wg.Done()
// }()
// }
// wg.Wait()
func (t *RedisConnPoolTest) TestConnPoolReusesConn(c *C) {
for i := 0; i < 1000; i++ {
ping := t.client.Ping()
c.Assert(ping.Err(), IsNil)
c.Assert(ping.Val(), Equals, "PONG")
}
// c.Assert(t.client.Close(), IsNil)
// c.Assert(t.dialedConns, Equals, int64(1000))
// c.Assert(t.closedConns, Equals, int64(1000))
// }
c.Assert(t.client.Pool().Size(), Equals, 1)
c.Assert(t.client.Pool().Len(), Equals, 1)
}
//------------------------------------------------------------------------------
@ -235,12 +229,14 @@ var _ = Suite(&RedisTest{})
func Test(t *testing.T) { TestingT(t) }
func (t *RedisTest) SetUpTest(c *C) {
if t.client == nil {
func (t *RedisTest) SetUpSuite(c *C) {
t.client = redis.NewTCPClient(&redis.Options{
Addr: ":6379",
})
}
func (t *RedisTest) SetUpTest(c *C) {
t.resetRedis(c)
}
func (t *RedisTest) TearDownTest(c *C) {
@ -336,33 +332,6 @@ func (t *RedisTest) TestManyKeys2(c *C) {
//------------------------------------------------------------------------------
func (t *RedisTest) TestConnPoolRemovesBrokenConn(c *C) {
c.Skip("fix me")
conn, err := net.Dial("tcp", redisAddr)
c.Assert(err, IsNil)
c.Assert(conn.Close(), IsNil)
client := redis.NewTCPClient(&redis.Options{
Addr: redisAddr,
})
defer func() {
c.Assert(client.Close(), IsNil)
}()
// c.Assert(client.ConnPool.Add(redis.NewConn(conn)), IsNil)
ping := client.Ping()
c.Assert(ping.Err().Error(), Equals, "use of closed network connection")
c.Assert(ping.Val(), Equals, "")
ping = client.Ping()
c.Assert(ping.Err(), IsNil)
c.Assert(ping.Val(), Equals, "PONG")
}
//------------------------------------------------------------------------------
func (t *RedisTest) TestAuth(c *C) {
auth := t.client.Auth("password")
c.Assert(auth.Err(), ErrorMatches, "ERR Client sent AUTH, but no password is set")
@ -2446,15 +2415,14 @@ func (t *RedisTest) TestPipeline(c *C) {
func (t *RedisTest) TestPipelineDiscardQueued(c *C) {
pipeline := t.client.Pipeline()
defer func() {
c.Assert(pipeline.Close(), IsNil)
}()
pipeline.Get("key")
pipeline.Discard()
cmds, err := pipeline.Exec()
c.Assert(err, IsNil)
c.Assert(cmds, HasLen, 0)
c.Assert(pipeline.Close(), IsNil)
}
func (t *RedisTest) TestPipelineFunc(c *C) {
@ -2489,19 +2457,18 @@ func (t *RedisTest) TestPipelineRunQueuedOnEmptyQueue(c *C) {
c.Assert(cmds, HasLen, 0)
}
func (t *RedisTest) TestPipelineIncrFromGoroutines(c *C) {
// TODO: make thread safe?
func (t *RedisTest) TestPipelineIncr(c *C) {
const N = 20000
key := "TestPipelineIncr"
pipeline := t.client.Pipeline()
defer func() {
c.Assert(pipeline.Close(), IsNil)
}()
wg := &sync.WaitGroup{}
for i := int64(0); i < 20000; i++ {
wg.Add(1)
go func() {
pipeline.Incr("TestIncrPipeliningFromGoroutinesKey")
wg.Add(N)
for i := 0; i < N; i++ {
pipeline.Incr(key)
wg.Done()
}()
}
wg.Wait()
@ -2514,23 +2481,24 @@ func (t *RedisTest) TestPipelineIncrFromGoroutines(c *C) {
}
}
get := t.client.Get("TestIncrPipeliningFromGoroutinesKey")
get := t.client.Get(key)
c.Assert(get.Err(), IsNil)
c.Assert(get.Val(), Equals, "20000")
c.Assert(get.Val(), Equals, strconv.Itoa(N))
c.Assert(pipeline.Close(), IsNil)
}
func (t *RedisTest) TestPipelineEchoFromGoroutines(c *C) {
pipeline := t.client.Pipeline()
defer func() {
c.Assert(pipeline.Close(), IsNil)
}()
func (t *RedisTest) TestPipelineEcho(c *C) {
const N = 1000
wg := &sync.WaitGroup{}
for i := int64(0); i < 1000; i += 2 {
wg.Add(1)
go func() {
msg1 := "echo" + strconv.FormatInt(i, 10)
msg2 := "echo" + strconv.FormatInt(i+1, 10)
wg.Add(N)
for i := 0; i < N; i++ {
go func(i int) {
pipeline := t.client.Pipeline()
msg1 := "echo" + strconv.Itoa(i)
msg2 := "echo" + strconv.Itoa(i+1)
echo1 := pipeline.Echo(msg1)
echo2 := pipeline.Echo(msg2)
@ -2545,8 +2513,10 @@ func (t *RedisTest) TestPipelineEchoFromGoroutines(c *C) {
c.Assert(echo2.Err(), IsNil)
c.Assert(echo2.Val(), Equals, msg2)
c.Assert(pipeline.Close(), IsNil)
wg.Done()
}()
}(i)
}
wg.Wait()
}
@ -2703,36 +2673,43 @@ func (t *RedisTest) TestWatchUnwatch(c *C) {
//------------------------------------------------------------------------------
func (t *RedisTest) TestSyncEchoFromGoroutines(c *C) {
func (t *RedisTest) TestRaceEcho(c *C) {
const N = 10000
wg := &sync.WaitGroup{}
for i := int64(0); i < 1000; i++ {
wg.Add(1)
go func() {
msg := "echo" + strconv.FormatInt(i, 10)
wg.Add(N)
for i := 0; i < N; i++ {
go func(i int) {
msg := "echo" + strconv.Itoa(i)
echo := t.client.Echo(msg)
c.Assert(echo.Err(), IsNil)
c.Assert(echo.Val(), Equals, msg)
wg.Done()
}()
}(i)
}
wg.Wait()
}
func (t *RedisTest) TestIncrFromGoroutines(c *C) {
func (t *RedisTest) TestRaceIncr(c *C) {
const N = 10000
key := "TestIncrFromGoroutines"
wg := &sync.WaitGroup{}
for i := int64(0); i < 20000; i++ {
wg.Add(1)
wg.Add(N)
for i := int64(0); i < N; i++ {
go func() {
incr := t.client.Incr("TestIncrFromGoroutinesKey")
c.Assert(incr.Err(), IsNil)
incr := t.client.Incr(key)
if err := incr.Err(); err != nil {
panic(err)
}
wg.Done()
}()
}
wg.Wait()
get := t.client.Get("TestIncrFromGoroutinesKey")
get := t.client.Get(key)
c.Assert(get.Err(), IsNil)
c.Assert(get.Val(), Equals, "20000")
c.Assert(get.Val(), Equals, strconv.Itoa(N))
}
//------------------------------------------------------------------------------