forked from BytomDAO/bytom
/
trace_store.go
140 lines (112 loc) · 3.06 KB
/
trace_store.go
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package contract
import (
"encoding/json"
log "github.com/sirupsen/logrus"
dbm "github.com/hyper-fi/bytom/database/leveldb"
"github.com/hyper-fi/bytom/protocol/bc"
)
const (
colon = byte(0x3a)
instance byte = iota + 1
chainStatus
)
var (
instancePrefixKey = []byte{instance, colon}
chainStatusPrefixKey = []byte{chainStatus, colon}
)
func instanceKey(traceID string) []byte {
return append(instancePrefixKey, []byte(traceID)...)
}
func chainStatusKey() []byte {
return chainStatusPrefixKey
}
type TraceStore struct {
db dbm.DB
}
func NewTraceStore(db dbm.DB) *TraceStore {
return &TraceStore{db: db}
}
// GetInstance return instance by given trace id
func (t *TraceStore) GetInstance(traceID string) (*Instance, error) {
key := instanceKey(traceID)
data := t.db.Get(key)
instance := &Instance{}
if err := json.Unmarshal(data, instance); err != nil {
return nil, err
}
return instance, nil
}
// LoadInstances used to load all instances in db
func (t *TraceStore) LoadInstances() ([]*Instance, error) {
iter := t.db.IteratorPrefix(instancePrefixKey)
defer iter.Release()
var instances []*Instance
for iter.Next() {
instance := &Instance{}
if err := json.Unmarshal(iter.Value(), instance); err != nil {
return nil, err
}
instances = append(instances, instance)
}
return instances, nil
}
// SaveInstances used to batch save multiple instances
func (t *TraceStore) SaveInstances(instances []*Instance) error {
batch := t.db.NewBatch()
if err := t.saveInstances(instances, batch); err != nil {
return err
}
batch.Write()
return nil
}
// RemoveInstance delete a instance by given trace id
func (t *TraceStore) RemoveInstance(traceID string) {
key := instanceKey(traceID)
t.db.Delete(key)
}
// SaveInstancesWithStatus batch save the instances and chain status
func (t *TraceStore) SaveInstancesWithStatus(instances []*Instance, blockHeight uint64, blockHash bc.Hash) error {
batch := t.db.NewBatch()
if err := t.saveInstances(instances, batch); err != nil {
return err
}
chainData, err := json.Marshal(&ChainStatus{BlockHeight: blockHeight, BlockHash: blockHash})
if err != nil {
return err
}
batch.Set(chainStatusKey(), chainData)
batch.Write()
return nil
}
// GetChainStatus return the current chain status
func (t *TraceStore) GetChainStatus() *ChainStatus {
data := t.db.Get(chainStatusKey())
if data == nil {
return nil
}
chainStatus := &ChainStatus{}
if err := json.Unmarshal(data, chainStatus); err != nil {
log.WithFields(log.Fields{"module": logModule, "err": err}).Fatal("get chain status from trace store")
}
return chainStatus
}
// SaveChainStatus save the chain status
func (t *TraceStore) SaveChainStatus(chainStatus *ChainStatus) error {
data, err := json.Marshal(chainStatus)
if err != nil {
return err
}
t.db.Set(chainStatusKey(), data)
return nil
}
func (t *TraceStore) saveInstances(instances []*Instance, batch dbm.Batch) error {
for _, inst := range instances {
key := instanceKey(inst.TraceID)
data, err := json.Marshal(inst)
if err != nil {
return err
}
batch.Set(key, data)
}
return nil
}