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mockledger.go
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mockledger.go
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/*
Copyright SecureKey Technologies Inc. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package mocks
import (
"fmt"
"sync"
pb "github.com/hyperledger/fabric-sdk-go/third_party/github.com/hyperledger/fabric/protos/peer"
)
// Block is n abstract block
type Block interface {
Number() uint64
SetNumber(blockNum uint64)
}
// BlockEvent is an abstract event
type BlockEvent interface{}
// Consumer is a consumer of a BlockEvent
type Consumer chan interface{}
// EventFactory creates block events
type EventFactory func(block Block) BlockEvent
// BlockEventFactory creates block events
var BlockEventFactory = func(block Block) BlockEvent {
b, ok := block.(*BlockWrapper)
if !ok {
panic(fmt.Sprintf("Invalid block type: %T", block))
}
return b.Block()
}
// FilteredBlockEventFactory creates filtered block events
var FilteredBlockEventFactory = func(block Block) BlockEvent {
b, ok := block.(*FilteredBlockWrapper)
if !ok {
panic(fmt.Sprintf("Invalid block type: %T", block))
}
return b.Block()
}
// MockLedger is a mock ledger that stores blocks sequentially
type MockLedger struct {
sync.RWMutex
blockProducer *BlockProducer
consumers []Consumer
blocks []Block
eventFactory EventFactory
}
// NewMockLedger creates a new MockLedger
func NewMockLedger(eventFactory EventFactory) *MockLedger {
return &MockLedger{
eventFactory: eventFactory,
blockProducer: NewBlockProducer(),
}
}
// BlockProducer returns the block producer
func (l *MockLedger) BlockProducer() *BlockProducer {
return l.blockProducer
}
// Register registers an event consumer
func (l *MockLedger) Register(consumer Consumer) {
l.Lock()
defer l.Unlock()
l.consumers = append(l.consumers, consumer)
}
// Unregister unregisters the given consumer
func (l *MockLedger) Unregister(Consumer Consumer) {
l.Lock()
defer l.Unlock()
for i, p := range l.consumers {
if p == Consumer {
if i != 0 {
l.consumers = l.consumers[1:]
}
l.consumers = l.consumers[1:]
break
}
}
}
// NewBlock stores a new block on the ledger
func (l *MockLedger) NewBlock(channelID string, transactions ...*TxInfo) {
l.Lock()
defer l.Unlock()
l.Store(NewBlockWrapper(l.blockProducer.NewBlock(channelID, transactions...)))
}
// NewFilteredBlock stores a new filtered block on the ledger
func (l *MockLedger) NewFilteredBlock(channelID string, filteredTx ...*pb.FilteredTransaction) {
l.Lock()
defer l.Unlock()
l.Store(NewFilteredBlockWrapper(l.blockProducer.NewFilteredBlock(channelID, filteredTx...)))
}
// Store stores the given block to the ledger
func (l *MockLedger) Store(block Block) {
l.blocks = append(l.blocks, block)
for _, p := range l.consumers {
blockEvent := l.eventFactory(block)
p <- blockEvent
}
}
// SendFrom sends block events to all registered consumers from the
// given block number
func (l *MockLedger) SendFrom(blockNum uint64) {
l.RLock()
defer l.RUnlock()
if blockNum >= uint64(len(l.blocks)) {
return
}
for _, block := range l.blocks[blockNum:] {
for _, p := range l.consumers {
p <- l.eventFactory(block)
}
}
}