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opts.go
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opts.go
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/*
Copyright SecureKey Technologies Inc. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package dispatcher
import (
"time"
"github.com/x-chain/fabric-sdk-go/pkg/common/options"
"github.com/x-chain/fabric-sdk-go/pkg/common/providers/fab"
"github.com/pkg/errors"
)
type params struct {
eventConsumerBufferSize uint
eventConsumerTimeout time.Duration
initialLastBlockNum uint64
initialBlockRegistrations []*BlockReg
initialFilteredBlockRegistrations []*FilteredBlockReg
initialCCRegistrations []*ChaincodeReg
initialTxStatusRegistrations []*TxStatusReg
}
func defaultParams() *params {
return ¶ms{
eventConsumerBufferSize: 100,
eventConsumerTimeout: 500 * time.Millisecond,
}
}
// WithEventConsumerBufferSize sets the size of the registered consumer's event channel.
func WithEventConsumerBufferSize(value uint) options.Opt {
return func(p options.Params) {
if setter, ok := p.(eventConsumerBufferSizeSetter); ok {
setter.SetEventConsumerBufferSize(value)
}
}
}
// WithEventConsumerTimeout is the timeout when sending events to a registered consumer.
// If < 0, if buffer full, unblocks immediately and does not send.
// If 0, if buffer full, will block and guarantee the event will be sent out.
// If > 0, if buffer full, blocks util timeout.
func WithEventConsumerTimeout(value time.Duration) options.Opt {
return func(p options.Params) {
if setter, ok := p.(eventEventConsumerTimeoutSetter); ok {
setter.SetEventConsumerTimeout(value)
}
}
}
// WithSnapshot sets the given TxStatus registrations.
func WithSnapshot(value fab.EventSnapshot) options.Opt {
return func(p options.Params) {
if setter, ok := p.(snapshotSetter); ok {
err := setter.SetSnapshot(value)
if err != nil {
logger.Errorf("Unable to set snapshot: %s", err)
}
}
}
}
type eventConsumerBufferSizeSetter interface {
SetEventConsumerBufferSize(value uint)
}
type eventEventConsumerTimeoutSetter interface {
SetEventConsumerTimeout(value time.Duration)
}
func (p *params) SetEventConsumerBufferSize(value uint) {
logger.Debugf("EventConsumerBufferSize: %d", value)
p.eventConsumerBufferSize = value
}
func (p *params) SetEventConsumerTimeout(value time.Duration) {
logger.Debugf("EventConsumerTimeout: %s", value)
p.eventConsumerTimeout = value
}
type snapshotSetter interface {
SetSnapshot(value fab.EventSnapshot) error
}
func (p *params) SetSnapshot(value fab.EventSnapshot) error {
logger.Debugf("Snapshot: %#v", value)
bRegistrations, err := asBlockRegistrations(value.BlockRegistrations())
if err != nil {
return err
}
fbRegistrations, err := asFBlockRegistrations(value.FilteredBlockRegistrations())
if err != nil {
return err
}
ccRegistrations, err := asCCRegistrations(value.CCRegistrations())
if err != nil {
return err
}
txRegistrations, err := asTxRegistrations(value.TxStatusRegistrations())
if err != nil {
return err
}
p.initialLastBlockNum = value.LastBlockReceived()
p.initialBlockRegistrations = bRegistrations
p.initialFilteredBlockRegistrations = fbRegistrations
p.initialCCRegistrations = ccRegistrations
p.initialTxStatusRegistrations = txRegistrations
return nil
}
func asBlockRegistrations(registrations []fab.Registration) ([]*BlockReg, error) {
var bRegistrations []*BlockReg
for _, reg := range registrations {
breg, ok := reg.(*BlockReg)
if !ok {
return nil, errors.New("invalid block registration")
}
bRegistrations = append(bRegistrations, breg)
}
return bRegistrations, nil
}
func asFBlockRegistrations(registrations []fab.Registration) ([]*FilteredBlockReg, error) {
var fbRegistrations []*FilteredBlockReg
for _, reg := range registrations {
fbreg, ok := reg.(*FilteredBlockReg)
if !ok {
return nil, errors.New("invalid filtered block registration")
}
fbRegistrations = append(fbRegistrations, fbreg)
}
return fbRegistrations, nil
}
func asCCRegistrations(registrations []fab.Registration) ([]*ChaincodeReg, error) {
var ccRegistrations []*ChaincodeReg
for _, reg := range registrations {
ccreg, ok := reg.(*ChaincodeReg)
if !ok {
return nil, errors.New("invalid chaincode registration")
}
ccRegistrations = append(ccRegistrations, ccreg)
}
return ccRegistrations, nil
}
func asTxRegistrations(registrations []fab.Registration) ([]*TxStatusReg, error) {
var txRegistrations []*TxStatusReg
for _, reg := range registrations {
txreg, ok := reg.(*TxStatusReg)
if !ok {
return nil, errors.New("invalid TxStatus registration")
}
txRegistrations = append(txRegistrations, txreg)
}
return txRegistrations, nil
}