// 检索模式运行
func (this *Goose) searchModeRun() {
log.Debug("run in search mode")
if this.searchSty == nil {
log.Error("Please set search strategy,see Goose.SetSearchStrategy()")
return
}
if this.indexSty == nil {
log.Warn("can't build index real time witout Index Strategy")
}
gooseSearch := NewGooseSearch()
err := gooseSearch.Init(this.confPath, this.indexSty, this.searchSty)
if err != nil {
log.Error(err)
return
}
log.Debug("goose search init succ")
err = gooseSearch.Run()
if err != nil {
log.Error(err)
return
}
}
func NewMergeEngine(db DataBaseReader, termList []TermInQuery) (*MergeEngine, error) {
mg := MergeEngine{}
if len(termList) >= GOOSE_MAX_QUERY_TERM {
return nil, log.Warn("to much terms [%d]", len(termList))
}
mg.omitflag = 0
mg.lstheap = &listMinHeap{}
mg.termCount = len(termList)
heap.Init(mg.lstheap)
// 把全部拉链建成小顶堆
for i, e := range termList {
var err error
item := listMinHeapItem{}
item.list, err = db.ReadIndex(e.Sign)
if err != nil {
log.Warn("read term[%d] : %s", e.Sign, err)
item.list = nil
}
item.no = i
item.pos = 0
item.sign = e.Sign
if e.CanOmit {
item.omit = 0 // 0表示可省
} else {
item.omit = 1 << uint(i) // 不可省term
}
// 拉链有效才放入堆
if item.list != nil && item.list.Len() > 0 {
heap.Push(mg.lstheap, item)
}
// 同时记下不可省term的标记
if e.CanOmit == false {
mg.omitflag ^= 1 << uint(i)
}
log.Debug("term[%d] omit[%d] weight[%d] listLen[%d]", item.sign,
item.omit, e.Weight, len(*item.list))
}
log.Debug("termCnt[%d] omitflag[%d]", mg.termCount, mg.omitflag)
return &mg, nil
}
func (this *GooseSearch) Run() error {
// read conf
log.Debug("GooseSearch Run begin")
searchGoroutineNum := this.conf.Int64("GooseSearch.Search.GoroutineNum")
searchSvrPort := this.conf.Int64("GooseSearch.Search.ServerPort")
indexSvrPort := this.conf.Int64("GooseSearch.Index.ServerPort")
searchReqBufSize := this.conf.Int64("GooseSearch.Search.RequestBufferSize")
searchResBufSize := this.conf.Int64("GooseSearch.Search.ResponseBufferSize")
indexReqBufSize := this.conf.Int64("GooseSearch.Index.RequestBufferSize")
//indexResBufSize := this.conf.GetInt("GooseSearch.Index.ResponseBufferSize")
refreshSleepTime := this.conf.Int64("GooseSearch.Refresh.SleepTime")
log.Debug("Read Conf searchGoroutineNum[%d] searchSvrPort[%d] "+
"indexSvrPort[%d] searchReqBufSize[%d] searchResBufSize[%d] "+
"indexReqBufSize[%d] refreshSleepTime[%d]", searchGoroutineNum,
searchSvrPort, indexSvrPort, searchReqBufSize, searchResBufSize,
indexReqBufSize, refreshSleepTime)
err := this.runSearchServer(int(searchGoroutineNum), int(searchSvrPort),
int(searchReqBufSize), int(searchResBufSize))
if err != nil {
return err
}
err = this.runIndexServer(int(indexSvrPort), int(indexReqBufSize))
if err != nil {
return err
}
err = this.runRefreshServer(int(refreshSleepTime))
if err != nil {
return err
}
neverReturn := sync.WaitGroup{}
neverReturn.Add(1)
neverReturn.Wait()
return nil
}
// 程序入口,解析程序参数,启动[建库|检索]模式
func (this *Goose) Run() {
defer func() {
if r := recover(); r != nil {
os.Exit(1)
}
}()
// 解析命令行参数
var opts struct {
// build mode
BuildMode bool `short:"b" long:"build" description:"run in build mode"`
// configure file
Configure string `short:"c" long:"conf" description:"congfigure file" default:"conf/goose.toml"`
// log configure file
LogConf string `short:"l" long:"logconf" description:"log congfigure file" default:"conf/log.toml"`
// build mode data file
DataFile string `short:"d" long:"datafile" description:"build mode data file"`
}
parser := flags.NewParser(&opts, flags.HelpFlag)
_, err := parser.ParseArgs(os.Args)
if err != nil {
fmt.Println(this.showLogo())
fmt.Println(err)
os.Exit(1)
}
if opts.BuildMode && len(opts.DataFile) == 0 {
fmt.Println(this.showLogo())
parser.WriteHelp(os.Stderr)
os.Exit(1)
}
this.confPath = opts.Configure
this.dataPath = opts.DataFile
this.logConfPath = opts.LogConf
// init log
err = log.LoadConfiguration(this.logConfPath)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
log.Debug("Load log conf finish")
// run
if opts.BuildMode {
this.buildModeRun()
} else {
this.searchModeRun()
}
// BUG(log4go) log4go need time to sync ...(wtf)
// see http://stackoverflow.com/questions/14252766/abnormal-behavior-of-log4go
time.Sleep(100 * time.Millisecond)
}
func (this *GooseSearch) runRefreshServer(sleeptime int) error {
if 0 == sleeptime {
return log.Error("arg error sleeptime[%d]", sleeptime)
}
go func() {
for {
time.Sleep(time.Duration(sleeptime) * time.Second)
log.Debug("refresh now")
// sync search db
err := this.searchDB.Sync()
if err != nil {
log.Warn(err)
}
}
}()
return nil
}
func (this *GooseSearch) Init(confPath string,
indexSty IndexStrategy, searchSty SearchStrategy) (err error) {
defer func() {
if r := recover(); r != nil {
err = log.Error(r)
}
}()
// load conf
this.conf, err = config.NewConf(confPath)
if err != nil {
return
}
// set max procs
maxProcs := int(this.conf.Int64("GooseSearch.MaxProcs"))
if maxProcs <= 0 {
maxProcs = runtime.NumCPU()
}
runtime.GOMAXPROCS(maxProcs)
log.Debug("set max procs [%d]", maxProcs)
// init dbsearcher
dbPath := this.conf.String("GooseBuild.DataBase.DbPath")
log.Debug("init db [%s]", dbPath)
this.searchDB = NewDBSearcher()
err = this.searchDB.Init(dbPath)
if err != nil {
return
}
log.Debug("init db [%s]", dbPath)
// index strategy global init
if indexSty != nil {
err = indexSty.Init(this.conf)
if err != nil {
return
}
}
log.Debug("index strategy init finish")
// search strategy global init
if searchSty != nil {
err = searchSty.Init(this.conf)
if err != nil {
return
}
}
log.Debug("search strategy init finish")
// var indexer
if indexSty != nil {
this.varIndexer, err = NewVarIndexer(this.searchDB, indexSty)
if err != nil {
return
}
}
log.Debug("VarIndexer init finish")
// searcher
if searchSty != nil {
this.searcher, err = NewSearcher(this.searchDB, searchSty)
if err != nil {
return
}
}
log.Debug("Searcher init finish")
return
}
func (this *MergeEngine) Next(termInDoclist []TermInDoc) (inId InIdType, currValid, allfinish bool) {
if len(termInDoclist) != this.termCount {
log.Warn("len(termInDoclist) != this.termCount")
return 0, false, true
}
if this.lstheap.Len() == 0 {
return 0, false, true
}
// 初始化
for i, _ := range termInDoclist {
termInDoclist[i].Sign = 0
termInDoclist[i].Weight = 0
}
oflag := 0
/*
// 先看当前id最小的堆顶
item := this.lstheap.Pop().(listMinHeapItem)
currInID := item.Curr().InID
// 记下当前doc
termInDoclist[ item.no ].Sign = item.sign
termInDoclist[ item.no ].Weight = item.Curr().Weight
oflag ^= item.omit
*/
top := this.lstheap.Top().(listMinHeapItem)
currInID := top.Curr().InID
currValid = true
allfinish = false
for this.lstheap.Len() > 0 {
top := this.lstheap.Top().(listMinHeapItem)
if top.Curr().InID != currInID {
// 遇到新的doc了,就是归并完一个doc
// 跳出去校验currInID的命中情况
break
}
// 堆里面还有相同的doc,先弹出
item := heap.Pop(this.lstheap).(listMinHeapItem)
// 记下当前doc
termInDoclist[item.no].Sign = item.sign
termInDoclist[item.no].Weight = item.Curr().Weight
oflag ^= item.omit
// 如果拉链没遍历完,继续加入堆
if item.Next() {
heap.Push(this.lstheap, item)
} else {
// 如果拉链遍历完,且这个拉链是不可省term
// 处理完当前doc后后面不需要再归并了
if item.omit > 0 {
allfinish = true
log.Debug("not omit item travel end no[%d] pos[%d] list.len[%d]",
item.no, item.pos, len(*item.list))
}
}
}
// 检查不可省term是否有全部命中
if oflag != this.omitflag {
// 这次归并得到的doc没有用,丢掉吧
currValid = false
} else {
currValid = true
}
inId = currInID
return
}
