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chcollector.go
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chcollector.go
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package hlf
import (
"context"
"fmt"
"sync"
"time"
"github.com/anoideaopen/cartridge/manager"
"github.com/anoideaopen/common-component/errorshlp"
"github.com/anoideaopen/glog"
"github.com/anoideaopen/robot/chcollector"
"github.com/anoideaopen/robot/dto/collectordto"
"github.com/anoideaopen/robot/dto/parserdto"
"github.com/anoideaopen/robot/helpers/nerrors"
"github.com/anoideaopen/robot/hlf/parser"
"github.com/anoideaopen/robot/logger"
"github.com/anoideaopen/robot/metrics"
"github.com/google/uuid"
"github.com/hyperledger/fabric-sdk-go/pkg/client/event"
"github.com/hyperledger/fabric-sdk-go/pkg/common/options"
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/core"
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/fab"
"github.com/hyperledger/fabric-sdk-go/pkg/core/config"
"github.com/hyperledger/fabric-sdk-go/pkg/fab/events/client"
"github.com/hyperledger/fabric-sdk-go/pkg/fab/events/deliverclient/seek"
"github.com/pkg/errors"
)
type realCollector interface {
GetData() <-chan *collectordto.BlockData
Close()
}
type chCollector struct {
log glog.Logger
m metrics.Metrics
srcChName string
user string
org string
configProvider core.ConfigProvider
cryptoManager manager.Manager
initStartFrom uint64
realCollector realCollector
proxyEvents chan<- *fab.BlockEvent
cancel context.CancelFunc
wgLoop *sync.WaitGroup
createEventsSrc func(ctx context.Context, startFrom uint64) (eventsSrc, error)
delayAfterSrcError time.Duration
awaitEventsTimeout time.Duration
}
type sdkEventsSrc struct {
sdkComps *sdkComponents
reg fab.Registration
eventService fab.EventService
events <-chan *fab.BlockEvent
clientID string
log glog.Logger
}
type eventsSrc interface {
close()
getEvents() <-chan *fab.BlockEvent
}
func (ses *sdkEventsSrc) getEvents() <-chan *fab.BlockEvent {
return ses.events
}
func (ses *sdkEventsSrc) close() {
if ses == nil {
return
}
if ses.reg != nil {
// bug from sdk - need to dry channel another way - leak registration
go func() {
// just dry
for range ses.events { //nolint:revive
}
}()
ses.eventService.Unregister(ses.reg)
ses.deleteEventService()
}
}
func (ses *sdkEventsSrc) deleteEventService() {
channelContext, err := ses.sdkComps.chProvider()
if err != nil {
ses.log.Infof("sdkComps chProvider return error: %s", err)
return
}
cs := channelContext.ChannelService()
var opts []options.Opt
opts = append(opts, client.WithBlockEvents())
if ses.clientID != "" {
opts = append(opts, client.WithID(ses.clientID))
}
err = cs.DeleteEventService(opts...)
if err != nil {
ses.log.Infof("delete event service error: %s", err)
return
}
}
const (
defaultDelayAfterSrcError = 5 * time.Second
defaultAwaitEventsTimeout = 60 * time.Second
)
func createChCollector(ctx context.Context,
dstChName, srcChName string,
dataReady chan<- struct{}, startFrom uint64, bufSize uint,
connectionProfile, userName, orgName string,
txPrefixes parserdto.TxPrefixes,
cryptoManager manager.Manager,
) (*chCollector, error) {
log := glog.FromContext(ctx).
With(logger.Labels{
Component: logger.ComponentCollector,
DstChName: dstChName,
SrcChName: srcChName,
}.Fields()...)
m := metrics.FromContext(ctx).CreateChild(
metrics.Labels().RobotChannel.Create(dstChName),
metrics.Labels().Channel.Create(srcChName))
prsr := parser.NewParser(log, dstChName, srcChName, txPrefixes)
proxyEvents := make(chan *fab.BlockEvent)
rc, err := chcollector.NewCollector(
glog.NewContext(metrics.NewContext(ctx, m), log),
prsr, dataReady, proxyEvents, bufSize)
if err != nil {
return nil, errorshlp.WrapWithDetails(err, nerrors.ErrTypeHlf, nerrors.ComponentCollector)
}
return createChCollectorAdv(
ctx, log, m,
srcChName, startFrom,
connectionProfile, userName, orgName,
cryptoManager,
proxyEvents, rc, nil,
defaultDelayAfterSrcError,
defaultAwaitEventsTimeout,
), nil
}
func createChCollectorAdv(ctx context.Context,
log glog.Logger, m metrics.Metrics,
srcChName string, startFrom uint64,
connectionProfile, userName, orgName string,
cryptoManager manager.Manager,
proxyEvents chan<- *fab.BlockEvent,
rc realCollector,
createEventsSrc func(ctx context.Context, startFrom uint64) (eventsSrc, error),
delayAfterSrcError time.Duration,
awaitEventsTimeout time.Duration,
) *chCollector {
chColl := &chCollector{
log: log,
m: m,
srcChName: srcChName,
user: userName,
org: orgName,
configProvider: config.FromFile(connectionProfile),
cryptoManager: cryptoManager,
initStartFrom: startFrom,
proxyEvents: proxyEvents,
wgLoop: &sync.WaitGroup{},
createEventsSrc: createEventsSrc,
realCollector: rc,
delayAfterSrcError: delayAfterSrcError,
awaitEventsTimeout: awaitEventsTimeout,
}
if chColl.createEventsSrc == nil {
chColl.createEventsSrc = func(ctx context.Context, startFrom uint64) (eventsSrc, error) {
return chColl.createSdkEventsSrc(ctx, startFrom)
}
}
loopCtx, cancel := context.WithCancel(ctx)
chColl.cancel = cancel
chColl.wgLoop.Add(1)
go chColl.loopProxy(loopCtx)
return chColl
}
func (cc *chCollector) createSdkEventsSrc(ctx context.Context, startFrom uint64) (res *sdkEventsSrc, resErr error) {
defer func() {
if resErr != nil {
res.close()
res = nil
}
}()
configBackends, err := cc.configProvider()
if err != nil {
resErr = errors.WithStack(err)
return
}
res = &sdkEventsSrc{
log: cc.log,
}
if cc.cryptoManager != nil {
res.sdkComps, resErr = createSdkComponentsWithCryptoMng(ctx, cc.srcChName, cc.org, configBackends,
cc.cryptoManager)
} else {
res.sdkComps, resErr = createSdkComponentsWithoutCryptoMng(ctx, cc.srcChName, cc.org, cc.user,
configBackends)
}
if resErr != nil {
return
}
// https://github.com/anoideaopen/robot/-/issues/89
// There is an issue in Fabric SDK when we subscribe from the block that was not created yet,
// so we subscribe from the latest block that was already created and skip it later
if startFrom > 0 {
startFrom--
}
clientID := fmt.Sprintf("%s-%s", cc.srcChName, uuid.New().String())
res.clientID = clientID
clOpt := []event.ClientOption{
event.WithBlockEvents(),
event.WithEventConsumerTimeout(0),
event.WithSeekType(seek.FromBlock),
event.WithBlockNum(startFrom),
event.WithClientID(clientID),
}
cc.log.Debugf("start collect from %d block in channel %s", startFrom, cc.srcChName)
res.eventService, err = event.New(res.sdkComps.chProvider, clOpt...)
if err != nil {
resErr = errors.WithStack(err)
return
}
cc.log.Debug("event client created")
res.reg, res.events, err = res.eventService.RegisterBlockEvent()
if err != nil {
resErr = errors.WithStack(err)
return
}
cc.log.Debug("blocks events registered")
return
}
func (cc *chCollector) loopProxy(ctx context.Context) {
defer func() {
close(cc.proxyEvents)
cc.wgLoop.Done()
}()
startFrom := cc.initStartFrom
isFirstAttempt := true
for ctx.Err() == nil {
ses, err := cc.createEventsSrc(ctx, startFrom)
if err != nil {
cc.sendChErrMetric(isFirstAttempt, false, false)
cc.log.Errorf("create sdk events source failed: %s", err)
delayOrCancel(ctx, cc.delayAfterSrcError)
continue
}
isFirstAttempt = false
lastPushedBlockNum := cc.loopProxyByEvents(ctx, startFrom, ses.getEvents())
if lastPushedBlockNum != nil {
startFrom = *lastPushedBlockNum + 1
}
ses.close()
delayOrCancel(ctx, cc.delayAfterSrcError)
}
}
func (cc *chCollector) loopProxyByEvents(ctx context.Context, startedFrom uint64, events <-chan *fab.BlockEvent) *uint64 {
var lastPushedBlockNum *uint64
expectedBlockNum := startedFrom
isFirstBlockGot := false
for {
select {
case <-ctx.Done():
return lastPushedBlockNum
case ev, ok := <-events:
if !ok {
cc.sendChErrMetric(false, true, false)
cc.log.Error("source events channel closed")
return lastPushedBlockNum
}
if ev.Block == nil || ev.Block.Header == nil {
cc.log.Error("got event block: invalid block!!!")
return lastPushedBlockNum
}
blockNum := ev.Block.Header.Number
cc.log.Debugf("got event block: %v", blockNum)
// It is allowed to receive (startedFrom - 1) once when we start receiving blocks
if !isFirstBlockGot && blockNum != startedFrom && startedFrom > 0 && blockNum == startedFrom-1 {
cc.log.Infof("got event block: %v, expected: %v. Skip it because we subscribe with -1 gap", blockNum, expectedBlockNum)
isFirstBlockGot = true
continue
}
if blockNum < expectedBlockNum {
cc.log.Errorf("got event block: %v, expected: %v. The block was already handled, skip it", blockNum, expectedBlockNum)
continue
}
// It is not allowed, might skip unhandled blocks
if blockNum > expectedBlockNum {
cc.log.Errorf("got event block: %v, expected: %v. The block num is greater than expected", blockNum, expectedBlockNum)
return lastPushedBlockNum
}
select {
case <-ctx.Done():
return lastPushedBlockNum
case cc.proxyEvents <- ev:
lastPushedBlockNum = &ev.Block.Header.Number
expectedBlockNum++
}
}
}
}
func (cc *chCollector) sendChErrMetric(isFirstAttempt, isSrcChClosed, isTimeout bool) {
cc.m.TotalSrcChErrors().Inc(
metrics.Labels().IsFirstAttempt.Create(fmt.Sprint(isFirstAttempt)),
metrics.Labels().IsSrcChClosed.Create(fmt.Sprint(isSrcChClosed)),
metrics.Labels().IsTimeout.Create(fmt.Sprint(isTimeout)),
)
}
func (cc *chCollector) Close() {
if cc.cancel != nil {
cc.cancel()
}
if cc.realCollector != nil {
cc.realCollector.Close()
}
cc.wgLoop.Wait()
}
func (cc *chCollector) GetData() <-chan *collectordto.BlockData {
return cc.realCollector.GetData()
}
func delayOrCancel(ctx context.Context, delay time.Duration) {
select {
case <-time.After(delay):
case <-ctx.Done():
}
}