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generator.go
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/
generator.go
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package blockgen
import (
"fmt"
"strings"
"time"
"github.com/FactomProject/factomd/common/constants"
"github.com/FactomProject/factomd/common/identity"
"github.com/FactomProject/factomd/common/interfaces"
"github.com/FactomProject/factomd/common/messages"
"github.com/FactomProject/factomd/common/messages/electionMsgs"
"github.com/FactomProject/factomd/common/primitives"
"github.com/FactomProject/factomd/database/boltdb"
"github.com/FactomProject/factomd/database/databaseOverlay"
"github.com/FactomProject/factomd/database/leveldb"
"github.com/FactomProject/factomd/database/mapdb"
"github.com/FactomProject/factomd/state"
log "github.com/sirupsen/logrus"
)
// DBGenerator is able to create a database given a defined config
type DBGenerator struct {
// We need to process blocks to get state values
// and ensure the data is correct
FactomdState *state.State
// Defines the blocks created and data in the db
BlockGenerator *BlockGen
last *state.DBState
config *DBGeneratorConfig
}
func NewDBGenerator(c *DBGeneratorConfig) (*DBGenerator, error) {
var err error
db := new(DBGenerator)
db.config = c
starttime := primitives.NewTimestampFromSeconds(uint32(time.Now().Add(-1 * 364 * 24 * time.Hour).Unix()))
if c.StartTime != "" {
starttimeT, err := time.Parse(c.TimeFormat(), c.StartTime)
if err != nil {
panic(err)
}
starttime = primitives.NewTimestampFromSeconds(uint32(starttimeT.Unix()))
}
// We need the factomd state to use it's functions
db.FactomdState = NewGeneratorState(c, starttime)
db.BlockGenerator, err = NewBlockGen(*c)
if err != nil {
return nil, err
}
head, err := db.FactomdState.DB.FetchDBlockHead()
if err != nil || head == nil || head.GetDatabaseHeight() == 0 {
db.loadGenesis()
} else {
// Load from db instead of genesis
log.Infof("Starting at block height %d", head.GetDatabaseHeight())
msg, err := db.FactomdState.LoadDBState(head.GetDatabaseHeight())
if err != nil {
return nil, err
}
dbs := db.msgToDBState(msg.(*messages.DBStateMsg))
db.last = dbs
dbs.Saved = true
db.FactomdState.DBStates.Put(dbs)
}
return db, nil
}
func NewGeneratorState(conf *DBGeneratorConfig, starttime interfaces.Timestamp) *state.State {
s := new(state.State)
s.TimestampAtBoot = starttime
s.SetLeaderTimestamp(starttime)
s.Balancehash = primitives.NewZeroHash()
var db interfaces.IDatabase
var err error
switch strings.ToLower(conf.DBType) {
case "level", "ldb":
db, err = leveldb.NewLevelDB(conf.DBPath, true)
case "bolt":
db = boltdb.NewBoltDB(nil, conf.DBPath)
case "map":
db = new(mapdb.MapDB)
}
if err != nil {
panic(err)
}
s.DB = databaseOverlay.NewOverlay(db)
s.LoadConfig(conf.FactomdConfigPath, "CUSTOM")
s.StateSaverStruct.FastBoot = false
s.EFactory = new(electionMsgs.ElectionsFactory)
s.Init()
s.NetworkNumber = constants.NETWORK_CUSTOM
customnetname := conf.CustomNetID
s.CustomNetworkID = primitives.Sha([]byte(customnetname)).Bytes()[:4]
var blkCnt uint32
head, err := s.DB.FetchDBlockHead()
if err == nil && head != nil {
blkCnt = head.GetHeader().GetDBHeight()
}
s.DBHeightAtBoot = blkCnt
list := s.DBStates
list.Base = blkCnt
list.ProcessHeight = blkCnt
s.ProcessLists.DBHeightBase = blkCnt
return s
}
// loadGenesis loads the gensis block for given config and saves it to disk as a starting point
func (g *DBGenerator) loadGenesis() {
var err error
fmt.Println("\n***********************************")
fmt.Println("******* New Database **************")
fmt.Println("***********************************")
var customIdentity interfaces.IHash
if g.FactomdState.Network == "CUSTOM" {
customIdentity, err = primitives.HexToHash(g.FactomdState.CustomBootstrapIdentity)
if err != nil {
panic(fmt.Sprintf("Could not decode Custom Bootstrap Identity (likely in config file) found: %s\n", g.FactomdState.CustomBootstrapIdentity))
panic(err)
}
}
dblk, ablk, fblk, ecblk := state.GenerateGenesisBlocks(g.FactomdState.GetNetworkID(), customIdentity)
msg := messages.NewDBStateMsg(g.FactomdState.GetTimestamp(), dblk, ablk, fblk, ecblk, nil, nil, nil)
// last block, flag it.
dbstate, _ := msg.(*messages.DBStateMsg)
dbstate.IsLast = true // this is the last DBState in this load
// this will cause s.DBFinished to go true
sds := g.msgToDBState(dbstate)
sds.ReadyToSave = true
sds.Signed = true
g.FactomdState.DBStates.NewDBState(false, sds.DirectoryBlock, sds.AdminBlock, sds.FactoidBlock, sds.EntryCreditBlock, sds.EntryBlocks, sds.Entries)
g.FactomdState.DBStates.SaveDBStateToDB(sds)
sds.Saved = true
g.last = sds
g.FactomdState.DBStates.Last().Saved = true
}
// SaveDBState will save a dbstate to disk
func (g *DBGenerator) SaveDBState(dbstate *state.DBState) {
dbstate.ReadyToSave = true
dbstate.Signed = true
dbstate.SaveStruct = new(state.SaveState)
dbstate.SaveStruct.IdentityControl = identity.NewIdentityManager()
g.FactomdState.DBStates.ProcessHeight = dbstate.DirectoryBlock.GetDatabaseHeight()
put := g.FactomdState.DBStates.Put(dbstate)
if !put {
log.Warnf("%d Not put in dbstate list", dbstate.DirectoryBlock.GetDatabaseHeight())
}
progress := g.FactomdState.DBStates.SaveDBStateToDB(dbstate)
if !progress {
log.Warnf("%d Not saved to disk", dbstate.DirectoryBlock.GetDatabaseHeight())
}
EntryLoop:
for {
select {
case ent := <-g.FactomdState.WriteEntry:
g.FactomdState.GetDB().InsertEntry(ent)
default:
break EntryLoop
}
}
dbstate.Saved = true
g.FactomdState.DBStates.Complete = dbstate.DirectoryBlock.GetDatabaseHeight() - g.FactomdState.DBStates.Base
g.FactomdState.ProcessLists.DBHeightBase = dbstate.DirectoryBlock.GetDatabaseHeight()
g.FactomdState.ProcessLists.Lists = make([]*state.ProcessList, 0)
}
func (g *DBGenerator) msgToDBState(msg *messages.DBStateMsg) *state.DBState {
return g.FactomdState.DBStates.NewDBState(false,
msg.DirectoryBlock,
msg.AdminBlock,
msg.FactoidBlock,
msg.EntryCreditBlock,
msg.EBlocks,
msg.Entries)
}
type DBGeneratorConfig struct {
DBPath string
DBType string
FactomdConfigPath string
CustomNetID string
StartTime string
EntryGenerator string
LoopsPerPrint int
EntryGenConfig EntryGeneratorConfig
}
func (DBGeneratorConfig) TimeFormat() string {
return "02 Jan 2006 15:04"
}
func (c DBGeneratorConfig) FactomLaunch() string {
return fmt.Sprintf("factomd -network=CUSTOM -customnet=%s", c.CustomNetID)
}
func NewDefaultDBGeneratorConfig() *DBGeneratorConfig {
c := new(DBGeneratorConfig)
c.DBType = "level"
c.DBPath = "factoid_level.db"
c.FactomdConfigPath = "gen.conf"
c.EntryGenConfig = *NewDefaultEntryGeneratorConfig()
c.StartTime = time.Now().Add(-1 * 364 * 24 * time.Hour).Format(c.TimeFormat())
c.LoopsPerPrint = 10
return c
}
// CreateBlocks actually creates the blocks and saves them to disk
func (g *DBGenerator) CreateBlocks(amt int) error {
start := time.Now()
loop := time.Now()
loopper := g.config.LoopsPerPrint
totalEntries := 0
loopEntries := 0 // Entries per loop
for i := 0; i < amt; i++ {
for count := 0; count < g.FactomdState.ElectionsQueue().Length(); count++ {
g.FactomdState.ElectionsQueue().Dequeue() // Always have to do a dequeue
}
if i%loopper == 0 && i != 0 {
totalDuration := time.Since(start).Seconds()
duration := time.Since(loop).Seconds()
avgb := float64(i) / totalDuration // avg block/s
left := float64(amt - i)
timeleft := left / avgb
log.Infof("Current Height %5d: %6d/%-6d at %6.2f b/s. Entries at %8.2f e/s. Avg Entry Rate: %8.2f e/s. ~%-12s Remain. Total Entries: %d",
g.last.DirectoryBlock.GetDatabaseHeight(), i, amt,
avgb, //float64(loopper)/duration,
float64(loopEntries)/duration,
float64(totalEntries)/totalDuration,
time.Duration(timeleft)*time.Second,
totalEntries,
)
loopEntries = 0
loop = time.Now()
}
dbstate, err := g.BlockGenerator.NewBlock(g.last, g.FactomdState.GetNetworkID(), g.FactomdState.GetLeaderTimestamp())
if err != nil {
return err
}
loopEntries += len(dbstate.Entries)
totalEntries += len(dbstate.Entries)
g.SaveDBState(dbstate)
g.last = dbstate
}
log.Infof("%d blocks saved to db", amt)
return nil
}