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Remove pool package

Browse source 
It will be replaced with sdk/pool

Signed-off-by: Evgeniy Kulikov <kim@nspcc.ru>
This commit is contained in:
Evgeniy Kulikov 2020-11-24 09:59:32 +03:00
parent b9972042fc
commit 1fecf6a7ac
3 changed files with 0 additions and 472 deletions
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384
api/pool/pool.go
View file

@ -1,384 +0,0 @@
package pool
import (
"context"
"crypto/ecdsa"
"math/rand"
"sort"
"sync"
"time"
"github.com/nspcc-dev/neofs-api-go/pkg/owner"
"github.com/nspcc-dev/neofs-api-go/pkg/token"
"github.com/pkg/errors"
"go.uber.org/atomic"
"go.uber.org/zap"
"google.golang.org/grpc"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/keepalive"
)
type (
node struct {
index int32
address string
weight uint32
usedAt time.Time
conn *grpc.ClientConn
}
Client interface {
Status() error
Connection(context.Context) (*grpc.ClientConn, error)
Token(context.Context, *grpc.ClientConn) (*token.SessionToken, error)
}
Pool interface {
Client
Close()
ReBalance(ctx context.Context)
}
Peer struct {
Address string
Weight float64
}
Config struct {
keepalive.ClientParameters
ConnectionTTL time.Duration
ConnectTimeout time.Duration
RequestTimeout time.Duration
Peers []Peer
GRPCVerbose bool
GRPCLogger grpclog.LoggerV2
Logger *zap.Logger
PrivateKey *ecdsa.PrivateKey
}
pool struct {
log *zap.Logger
ttl time.Duration
conTimeout time.Duration
reqTimeout time.Duration
opts keepalive.ClientParameters
currentIdx *atomic.Int32
currentConn *grpc.ClientConn
ping Pinger
*sync.Mutex
nodes []*node
keys []uint32
conns map[uint32][]*node
tokens map[string]*token.SessionToken
oid *owner.ID
key *ecdsa.PrivateKey
unhealthy *atomic.Error
}
Pinger interface {
Call(context.Context, *grpc.ClientConn) error
}
)
var (
errNoConnections = errors.New("no connections")
errBootstrapping = errors.New("bootstrapping")
errEmptyConnection = errors.New("empty connection")
errNoHealthyConnections = errors.New("no active connections")
)
func New(cfg *Config) (Pool, error) {
p := &pool{
log: cfg.Logger,
key: cfg.PrivateKey,
Mutex: new(sync.Mutex),
keys: make([]uint32, 0),
nodes: make([]*node, 0),
conns: make(map[uint32][]*node),
tokens: make(map[string]*token.SessionToken),
currentIdx: atomic.NewInt32(-1),
ttl: cfg.ConnectionTTL,
conTimeout: cfg.ConnectTimeout,
reqTimeout: cfg.RequestTimeout,
opts: cfg.ClientParameters,
unhealthy: atomic.NewError(errBootstrapping),
}
p.oid = owner.NewID()
wallet, err := owner.NEO3WalletFromPublicKey(&p.key.PublicKey)
if err != nil {
return nil, err
}
p.oid.SetNeo3Wallet(wallet)
if cfg.GRPCVerbose {
grpclog.SetLoggerV2(cfg.GRPCLogger)
}
seed := time.Now().UnixNano()
rand.Seed(seed)
cfg.Logger.Info("used random seed", zap.Int64("seed", seed))
if p.ping, err = newV2Ping(cfg.PrivateKey); err != nil {
return nil, err
}
for i := range cfg.Peers {
if cfg.Peers[i].Address == "" {
cfg.Logger.Warn("skip, empty address")
break
}
p.nodes = append(p.nodes, &node{
index: int32(i),
address: cfg.Peers[i].Address,
weight: uint32(cfg.Peers[i].Weight * 100),
})
cfg.Logger.Info("add new peer",
zap.String("address", p.nodes[i].address),
zap.Uint32("weight", p.nodes[i].weight))
}
if len(p.nodes) == 0 {
return nil, errNoConnections
}
return p, nil
}
func (p *pool) Status() error {
return p.unhealthy.Load()
}
func (p *pool) Close() {
p.Lock()
defer p.Unlock()
for i := range p.nodes {
if p.nodes[i] == nil || p.nodes[i].conn == nil {
continue
}
p.log.Warn("close connection",
zap.String("address", p.nodes[i].address),
zap.Error(p.nodes[i].conn.Close()))
}
}
func (p *pool) ReBalance(ctx context.Context) {
p.Lock()
defer func() {
p.Unlock()
_, err := p.Connection(ctx)
p.unhealthy.Store(err)
}()
keys := make(map[uint32]struct{})
tokens := make(map[string]*token.SessionToken)
for i := range p.nodes {
var (
idx = -1
exists bool
err error
start = time.Now()
tkn *token.SessionToken
conn = p.nodes[i].conn
weight = p.nodes[i].weight
)
if err = ctx.Err(); err != nil {
p.log.Warn("something went wrong", zap.Error(err))
p.unhealthy.Store(err)
return
}
if conn == nil {
p.log.Debug("empty connection, try to connect",
zap.String("address", p.nodes[i].address))
{ // try to connect
ctx, cancel := context.WithTimeout(ctx, p.conTimeout)
conn, err = grpc.DialContext(ctx, p.nodes[i].address,
grpc.WithBlock(),
grpc.WithInsecure(),
grpc.WithKeepaliveParams(p.opts))
cancel()
}
if err != nil || conn == nil {
p.log.Warn("skip, could not connect to node",
zap.String("address", p.nodes[i].address),
zap.Stringer("elapsed", time.Since(start)),
zap.Error(err))
continue
}
{ // try to prepare token
ctx, cancel := context.WithTimeout(ctx, p.reqTimeout)
tkn, err = p.prepareToken(ctx, conn)
cancel()
}
if err != nil {
p.log.Debug("could not prepare session token",
zap.String("address", p.nodes[i].address),
zap.Error(err))
continue
}
tokens[conn.Target()] = tkn
p.nodes[i].conn = conn
p.nodes[i].usedAt = time.Now()
p.log.Debug("connected to node", zap.String("address", p.nodes[i].address))
} else if tkn, exists = p.tokens[conn.Target()]; exists {
// token exists, ignore
} else if tkn, err = p.prepareToken(ctx, conn); err != nil {
p.log.Error("could not prepare session token",
zap.String("address", p.nodes[i].address),
zap.Error(err))
continue
}
for j := range p.conns[weight] {
if p.conns[weight][j] != nil && p.conns[weight][j].conn == conn {
idx = j
exists = true
break
}
}
usedAt := time.Since(p.nodes[i].usedAt)
// if something wrong with connection (bad state, unhealthy or not used a long time), try to close it and remove
if err = p.isAlive(ctx, conn); err != nil || usedAt > p.ttl {
p.log.Warn("connection not alive",
zap.String("address", p.nodes[i].address),
zap.Stringer("since", usedAt),
zap.Error(err))
if exists {
// remove from connections
p.conns[weight] = append(p.conns[weight][:idx], p.conns[weight][idx+1:]...)
}
// remove token
delete(tokens, conn.Target())
if err = conn.Close(); err != nil {
p.log.Warn("could not close bad connection",
zap.String("address", p.nodes[i].address),
zap.Stringer("since", usedAt),
zap.Error(err))
}
if p.nodes[i].conn != nil {
p.nodes[i].conn = nil
}
continue
}
keys[weight] = struct{}{}
p.log.Debug("connection alive",
zap.String("address", p.nodes[i].address),
zap.Stringer("since", usedAt))
if !exists {
p.conns[weight] = append(p.conns[weight], p.nodes[i])
}
if tkn != nil {
tokens[conn.Target()] = tkn
}
}
p.tokens = tokens
p.keys = p.keys[:0]
for w := range keys {
p.keys = append(p.keys, w)
}
sort.Slice(p.keys, func(i, j int) bool {
return p.keys[i] > p.keys[j]
})
}
func (p *pool) Connection(ctx context.Context) (*grpc.ClientConn, error) {
p.Lock()
defer p.Unlock()
if err := p.isAlive(ctx, p.currentConn); err == nil {
if id := p.currentIdx.Load(); id != -1 && p.nodes[id] != nil {
p.nodes[id].usedAt = time.Now()
}
return p.currentConn, nil
}
for _, w := range p.keys {
switch ln := len(p.conns[w]); ln {
case 0:
continue
case 1:
p.currentConn = p.conns[w][0].conn
p.conns[w][0].usedAt = time.Now()
p.currentIdx.Store(p.conns[w][0].index)
return p.currentConn, nil
default: // > 1
i := rand.Intn(ln)
p.currentConn = p.conns[w][i].conn
p.conns[w][i].usedAt = time.Now()
p.currentIdx.Store(p.conns[w][i].index)
return p.currentConn, nil
}
}
p.currentConn = nil
p.currentIdx.Store(-1)
if ctx.Err() != nil {
return nil, ctx.Err()
}
return nil, errNoHealthyConnections
}
func (p *pool) isAlive(ctx context.Context, cur *grpc.ClientConn) error {
if cur == nil {
return errEmptyConnection
}
switch st := cur.GetState(); st {
case connectivity.Idle, connectivity.Ready, connectivity.Connecting:
ctx, cancel := context.WithTimeout(ctx, p.reqTimeout)
defer cancel()
return p.ping.Call(ctx, cur)
default:
return errors.New(st.String())
}
}

52
api/pool/session.go
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@ -1,52 +0,0 @@
package pool
import (
"context"
"math"
"go.uber.org/zap"
"github.com/nspcc-dev/neofs-api-go/pkg/client"
"github.com/nspcc-dev/neofs-api-go/pkg/token"
"google.golang.org/grpc"
)
// SessionToken returns session token for connection
func (p *pool) Token(ctx context.Context, conn *grpc.ClientConn) (*token.SessionToken, error) {
p.Lock()
defer p.Unlock()
if tkn, ok := p.tokens[conn.Target()]; ok && tkn != nil {
return tkn, nil
}
// prepare session token
tkn, err := p.prepareToken(ctx, conn)
if err != nil {
return nil, err
}
// save token for current connection
p.tokens[conn.Target()] = tkn
return tkn, nil
}
// creates token using
func (p *pool) prepareToken(ctx context.Context, conn *grpc.ClientConn) (*token.SessionToken, error) {
cli, err := client.New(p.key, client.WithGRPCConnection(conn))
if err != nil {
return nil, err
}
tkn, err := cli.CreateSession(ctx, math.MaxUint64)
if err != nil {
return nil, err
}
p.log.Info("token created for connection",
zap.String("address", conn.Target()),
zap.Stringer("owner", tkn.OwnerID()))
return tkn, err
}

36
api/pool/v2.go
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@ -1,36 +0,0 @@
package pool
import (
"context"
"crypto/ecdsa"
"github.com/nspcc-dev/neofs-api-go/v2/client"
"github.com/nspcc-dev/neofs-api-go/v2/netmap"
"github.com/nspcc-dev/neofs-api-go/v2/signature"
"github.com/pkg/errors"
"google.golang.org/grpc"
)
type v2Ping struct {
req *netmap.LocalNodeInfoRequest
}
func newV2Ping(key *ecdsa.PrivateKey) (Pinger, error) {
req := new(netmap.LocalNodeInfoRequest)
if err := signature.SignServiceMessage(key, req); err != nil {
return nil, errors.Wrap(err, "could not sign `PingRequest`")
}
return &v2Ping{req: req}, nil
}
func (v *v2Ping) Call(ctx context.Context, conn *grpc.ClientConn) error {
if cli, err := netmap.NewClient(netmap.WithGlobalOpts(client.WithGRPCConn(conn))); err != nil {
return err
} else if _, err := cli.LocalNodeInfo(ctx, v.req); err != nil {
return err
}
return nil
}