Golang log4go.Error函数代码示例

//apend data
func (self *SegmentLog) Appends(logs []*oplog) error {

	//if closed
	if self.isOpen == 0 {
		return errors.New(fmt.Sprintf("SegmentLog Is Closed!|%s", self.path))
	}

	length := int64(0)
	for _, lo := range logs {
		tmp := lo.marshal()
		for {
			l, err := self.bw.Write(tmp)
			length += int64(l)
			if nil != err && err != io.ErrShortWrite {
				log.Error("SegmentLog|Append|FAIL|%s|%d/%d", err, l, len(tmp))
				return err
			} else if nil == err {
				break
			} else {
				self.bw.Reset(self.wf)
				log.Error("SegmentLog|Append|FAIL|%s", err)
			}
			tmp = tmp[l:]

		}
	}

	//flush
	self.bw.Flush()

	//move offset
	atomic.AddInt64(&self.offset, int64(length))
	return nil
}

//获取订阅关系并添加watcher
func (self *ZKManager) GetBindAndWatch(topic string) (map[string][]*Binding, error) {

	path := KITEQ_SUB + "/" + topic

	exist, _, _, err := self.session.ExistsW(path)
	if !exist {
		//不存在订阅关系的时候需要创建该topic和
		return make(map[string][]*Binding, 0), err
	}

	//获取topic下的所有qserver
	groupIds, _, _, err := self.session.ChildrenW(path)
	if nil != err {
		log.Error("ZKManager|GetBindAndWatch|GroupID|FAIL|%s|%s\n", err, path)
		return nil, err
	}

	hps := make(map[string][]*Binding, len(groupIds))
	//获取topic对应的所有groupId下的订阅关系
	for _, groupId := range groupIds {
		tmppath := path + "/" + groupId
		binds, err := self.getBindData(tmppath)
		if nil != err {
			log.Error("GetBindAndWatch|getBindData|FAIL|%s|%s\n", tmppath, err)
			continue
		}

		//去掉分组后面的-bind
		gid := strings.TrimSuffix(groupId, "-bind")
		hps[gid] = binds
	}

	return hps, nil
}

func (self *KiteMysqlStore) Query(messageId string) *MessageEntity {

	var entity *MessageEntity
	s := self.sqlwrapper.hashQuerySQL(messageId)
	rows, err := self.dbshard.FindSlave(messageId).Query(s, messageId)
	if nil != err {
		log.Error("KiteMysqlStore|Query|FAIL|%s|%s\n", err, messageId)
		return nil
	}
	defer rows.Close()

	if rows.Next() {

		entity = &MessageEntity{}
		fc := self.convertor.convertFields(entity, filternothing)
		err := rows.Scan(fc...)
		if nil != err {
			log.Error("KiteMysqlStore|Query|SCAN|FAIL|%s|%s\n", err, messageId)
			return nil
		}
		self.convertor.Convert2Entity(fc, entity, filternothing)
		switch entity.MsgType {
		case protocol.CMD_BYTES_MESSAGE:
			//do nothing
		case protocol.CMD_STRING_MESSAGE:
			entity.Body = string(entity.GetBody().([]byte))
		}
	}

	return entity
}

//没有body的entity
func (self *KiteMysqlStore) PageQueryEntity(hashKey string, kiteServer string, nextDeliveryTime int64, startIdx, limit int) (bool, []*MessageEntity) {

	s := self.sqlwrapper.hashPQSQL(hashKey)
	// log.Println(s)
	rows, err := self.dbshard.FindSlave(hashKey).
		Query(s, kiteServer, time.Now().Unix(), nextDeliveryTime, startIdx, limit+1)
	if err != nil {
		log.Error("KiteMysqlStore|Query|FAIL|%s|%s\n", err, hashKey)
		return false, nil
	}
	defer rows.Close()

	results := make([]*MessageEntity, 0, limit)
	for rows.Next() {

		entity := &MessageEntity{}
		fc := self.convertor.convertFields(entity, filterbody)
		err := rows.Scan(fc...)
		if err != nil {
			log.Error("KiteMysqlStore|PageQueryEntity|FAIL|%s|%s|%d|%d\n", err, kiteServer, nextDeliveryTime, startIdx)
		} else {

			self.convertor.Convert2Entity(fc, entity, filterbody)
			results = append(results, entity)
		}
	}

	if len(results) > limit {
		return true, results[:limit]
	} else {
		return false, results
	}
}

//发布订阅关系
func (self *ZKManager) PublishBindings(groupId string, bindings []*Binding) error {

	//按topic分组
	groupBind := make(map[string][]*Binding, 10)
	for _, b := range bindings {
		g, ok := groupBind[b.Topic]
		if !ok {
			g = make([]*Binding, 0, 2)
		}
		b.GroupId = groupId
		g = append(g, b)
		groupBind[b.Topic] = g
	}

	for topic, binds := range groupBind {
		data, err := MarshalBinds(binds)
		if nil != err {
			log.Error("ZKManager|PublishBindings|MarshalBind|FAIL|%s|%s|%t\n", err, groupId, binds)
			return err
		}

		createType := zk.CreatePersistent

		path := KITEQ_SUB + "/" + topic
		//注册对应topic的groupId //注册订阅信息
		succpath, err := self.registePath(path, groupId+"-bind", createType, data)
		if nil != err {
			log.Error("ZKManager|PublishTopic|Bind|FAIL|%s|%s/%s\n", err, path, binds)
			return err
		} else {
			log.Info("ZKManager|PublishTopic|Bind|SUCC|%s|%s\n", succpath, binds)
		}
	}
	return nil
}

//内部创建节点的方法
func (self *ZKManager) innerCreatePath(tmppath string, data []byte, createType zk.CreateType) error {
	exist, _, _, err := self.session.ExistsW(tmppath)
	if nil == err && !exist {
		_, err := self.session.Create(tmppath, data, createType, zk.WorldACL(zk.PermAll))
		if nil != err {
			log.Error("ZKManager|innerCreatePath|FAIL|%s|%s\n", err, tmppath)
			return err
		}

		//做一下校验等待
		for i := 0; i < 5; i++ {
			exist, _, _ = self.session.Exists(tmppath)
			if !exist {
				time.Sleep(time.Duration(i*100) * time.Millisecond)
			} else {
				break
			}
		}

		return err
	} else if nil != err {
		log.Error("ZKManager|innerCreatePath|FAIL|%s\n", err)
		return err
	} else if nil != data {
		//存在该节点，推送新数据
		_, err := self.session.Set(tmppath, data, -1)
		if nil != err {
			log.Error("ZKManager|innerCreatePath|PUSH DATA|FAIL|%s|%s|%s\n", err, tmppath, string(data))
			return err
		}
	}
	return nil
}

func (self *Segment) Close() error {
	self.Lock()
	defer self.Unlock()
	if atomic.CompareAndSwapInt32(&self.isOpen, 1, 0) {
		//close segment log
		self.slog.Close()

		//close segment
		err := self.bw.Flush()
		if nil != err {
			log.Error("Segment|Close|Writer|FLUSH|FAIL|%s|%s|%s\n", err, self.path, self.name)
		}
		//free chunk memory
		self.chunks = nil

		err = self.wf.Close()

		if nil != err {
			log.Error("Segment|Close|Write FD|FAIL|%s|%s|%s\n", err, self.path, self.name)
			return err
		} else {
			err = self.rf.Close()
			if nil != err {
				log.Error("Segment|Close|Read FD|FAIL|%s|%s|%s\n", err, self.path, self.name)
			}
			return err
		}

	}

	return nil

}

func (self convertor) Convert2Params(entity *store.MessageEntity) []interface{} {

	val := reflect.ValueOf(*entity)
	fvs := make([]interface{}, 0, len(self.columns))
	for _, v := range self.columns {

		var fv interface{}
		if v.columnName == "body" {
			if entity.MsgType == protocol.CMD_STRING_MESSAGE {
				fv = []byte(entity.GetBody().(string))
			} else if entity.MsgType == protocol.CMD_BYTES_MESSAGE {
				fv = entity.GetBody().([]byte)
			} else {
				log.Error("convertor|Convert2Params|UnSupport MESSAGE TYPE|%s\n", entity.MsgType)
			}
		} else {
			f := val.FieldByName(v.fieldName)

			// log.Debug("convertor|Convert2Params|%s|%s\n", v.fieldName, f)

			switch f.Kind() {
			case reflect.Ptr:
				header, ok := f.Interface().(*protocol.Header)
				if ok {
					//头部用Pb序列化
					data, err := protocol.MarshalPbMessage(header)
					if err != nil {
						log.Error("convertor|Convert2Params|Marshal|HEAD|FAIL|%s|%s\n", err, f.Addr().Interface())
						return nil
					}
					fv = data
				} else {
					log.Error("convertor|Convert2Params|Not protocol.Header PRT |FAIL|%s\n", f.Addr())
					return nil
				}

			case reflect.Slice, reflect.Array:

				if f.Type().Elem().Kind() == reflect.String {
					data, err := json.Marshal(f.Interface())
					if nil != err {
						log.Error("convertor|Convert2Params|Marshal|Slice|FAIL||%s\n", err)
						return nil
					}
					fv = string(data)
				} else {
					fv = f.Interface()
				}

			default:
				fv = f.Interface()
			}
		}
		fvs = append(fvs, &fv)
	}

	return fvs

}

func (self *KiteMysqlStore) Start() {

	count := SHARD_SEED
	//创建Hash的channel
	batchDelChan := make([]chan string, 0, count)
	batchUpChan := make([]chan *MessageEntity, 0, count)
	batchComChan := make([]chan string, 0, count)
	for i := 0; i < count; i++ {
		batchUpChan = append(batchUpChan, make(chan *MessageEntity, self.batchUpSize*2))
		batchDelChan = append(batchDelChan, make(chan string, self.batchDelSize*2))
		batchComChan = append(batchComChan, make(chan string, self.batchUpSize*2))
	}

	//批量的channel
	self.batchUpChan = batchUpChan
	self.batchDelChan = batchDelChan
	self.batchComChan = batchComChan

	//创建每种批量的preparedstmt
	stmts := make(map[batchType][][]*StmtPool, 4)
	for k, v := range self.sqlwrapper.batchSQL {
		btype := k
		pool := make([][]*StmtPool, 0, self.dbshard.ShardNum())
		//对每个shard构建stmt的pool
		for i := 0; i < self.dbshard.ShardNum(); i++ {
			innerPool := make([]*StmtPool, 0, self.dbshard.HashNum())
			for j, s := range v {
				psql := s
				db := self.dbshard.FindShardById(i*self.dbshard.HashNum() + j).master
				err, p := NewStmtPool(5, 10, 20, 1*time.Minute, func() (error, *sql.Stmt) {
					stmt, err := db.Prepare(psql)
					if nil != err {
						log.Error("StmtPool|Create Stmt|FAIL|%s|%s\n", err, psql)
						return err, nil
					}
					return nil, stmt
				})
				if nil != err {
					log.Error("NewKiteMysql|NewStmtPool|FAIL|%s\n", err)
					panic(err)
				}
				innerPool = append(innerPool, p)
			}
			pool = append(pool, innerPool)
		}
		stmts[btype] = pool
	}

	self.stmtPools = stmts

	for i := 0; i < count; i++ {
		// log.Printf("KiteMysqlStore|start|SQL|%s\n|%s\n", sqlu, sqld)
		self.startBatch(i, self.batchUpChan[i],
			self.batchDelChan[i], self.batchComChan[i])
	}
	log.Info("KiteMysqlStore|Start...")
}

func (self *KiteMysqlStore) batchUpdate(hashId int, entity []*MessageEntity) bool {

	if len(entity) <= 0 {
		return true
	}

	p := self.stmtPool(UPDATE, entity[0].MessageId)
	err, stmt := p.Get()
	if nil != err {
		log.Error("KiteMysqlStore|batchUpdate|GET STMT|FAIL|%s|%d\n", err, hashId)
		return false
	}
	defer p.Release(stmt)

	args := make([]interface{}, 0, 5)
	var errs error
	for _, e := range entity {

		args = args[:0]

		sg, err := json.Marshal(e.SuccGroups)
		if nil != err {
			log.Error("KiteMysqlStore|batchUpdate|SUCC GROUP|MARSHAL|FAIL|%s|%s|%s\n", err, e.MessageId, e.SuccGroups)
			errs = err
			continue
		}

		args = append(args, sg)

		fg, err := json.Marshal(e.FailGroups)
		if nil != err {
			log.Error("KiteMysqlStore|batchUpdate|FAIL GROUP|MARSHAL|FAIL|%s|%s|%s\n", err, e.MessageId, e.FailGroups)
			errs = err
			continue
		}

		args = append(args, fg)

		//设置一下下一次投递时间
		args = append(args, e.NextDeliverTime)

		args = append(args, e.DeliverCount)

		args = append(args, e.MessageId)

		_, err = stmt.Exec(args...)
		if nil != err {
			log.Error("KiteMysqlStore|batchUpdate|FAIL|%s|%s\n", err, e)
			errs = err
		}

	}
	return nil == errs
}

func (self *KiteFileStore) Query(messageId string) *MessageEntity {

	lock, _, el := self.hash(messageId)
	lock.RLock()
	defer lock.RUnlock()
	e, ok := el[messageId]
	if !ok {
		return nil
	}

	v := e.Value.(*opBody)

	//wait save done
	self.waitSaveDone(v)

	data, err := self.snapshot.Query(v.Id)
	if nil != err {
		// log.Error("KiteFileStore|Query|Entity|FAIL|%s|%d", err, v.Id)
		return nil
	}

	var msg interface{}
	msgType := data[0]
	switch msgType {
	case protocol.CMD_BYTES_MESSAGE:
		var bms protocol.BytesMessage
		err = protocol.UnmarshalPbMessage(data[1:], &bms)
		msg = &bms
	case protocol.CMD_STRING_MESSAGE:
		var sms protocol.StringMessage
		err = protocol.UnmarshalPbMessage(data[1:], &sms)
		msg = &sms
	default:
		log.Error("KiteFileStore|Query|INVALID|MSGTYPE|%d", msgType)
		return nil
	}

	if nil != err {
		log.Error("KiteFileStore|Query|UnmarshalPbMessage|Entity|FAIL|%s", err)
		return nil
	} else {
		entity := NewMessageEntity(protocol.NewQMessage(msg))
		//merge data
		entity.Commit = v.Commit
		entity.FailGroups = v.FailGroups
		entity.SuccGroups = v.SuccGroups
		entity.NextDeliverTime = v.NextDeliverTime
		entity.DeliverCount = v.DeliverCount
		return entity
	}

}

func (self *Segment) Open(do func(ol *oplog)) error {

	self.Lock()
	defer self.Unlock()
	if atomic.CompareAndSwapInt32(&self.isOpen, 0, 1) {

		// log.Info("Segment|Open|BEGIN|%s|%s", self.path, self.name)
		var rf *os.File
		var wf *os.File
		_, err := os.Stat(self.path)
		//file exist
		if os.IsNotExist(err) {
			_, err := os.Create(self.path)
			if nil != err {
				log.Error("Segment|Create|FAIL|%s|%s", err, self.path)
				return err
			}
		}

		//file not exist create file
		wf, err = os.OpenFile(self.path, os.O_RDWR|os.O_APPEND, os.ModePerm)
		if nil != err {
			log.Error("Segment|Open|FAIL|%s|%s", err, self.name)
			return err
		}

		rf, err = os.OpenFile(self.path, os.O_RDWR, os.ModePerm)
		if nil != err {
			log.Error("Segment|Open|FAIL|%s|%s", err, self.name)
			return err
		}

		self.rf = rf
		self.wf = wf
		//buffer
		self.br = bufio.NewReader(rf)
		//load
		self.loadCheck()
		// //seek
		// self.wf.Seek(self.offset, 0)
		self.bw = bufio.NewWriter(wf)
		//op segment log
		self.slog.Open()
		//recover segment
		self.recover(do)
		total, n, d, e := self.stat()
		log.Info("Segment|Open|SUCC|%s|total:%d,n:%d,d:%d,e:%d", self.name, total, n, d, e)
		return nil
	}
	return nil
}

//traverse oplog
func (self *SegmentLog) Replay(do func(l *oplog)) {

	self.Open()
	offset := int64(0)
	tmp := make([]byte, 1024)
	//seek to head
	self.rf.Seek(0, 0)
	self.br.Reset(self.rf)

	for {
		var length int32
		err := binary.Read(self.br, binary.BigEndian, &length)
		if nil != err {
			if err == io.EOF {
				self.br.Reset(self.rf)
				break
			}
			log.Warn("SegmentLog|Replay|LEN|%s|Skip...", err)
			continue
		}

		// log.Debug("SegmentLog|Replay|LEN|%d", length)

		if int(length) > cap(tmp) {
			grow := make([]byte, int(length)-cap(tmp))
			tmp = append(tmp, grow...)
		}

		err = binary.Read(self.br, binary.BigEndian, tmp[:int(length)-4])
		if nil != err {
			self.br.Reset(self.rf)
			log.Error("SegmentLog|Replay|Data|%s", err)
			break
		}

		var ol oplog
		r := bytes.NewReader(tmp[:int(length)-4])
		deco := gob.NewDecoder(r)
		err = deco.Decode(&ol)
		if nil != err {
			log.Error("SegmentLog|Replay|unmarshal|oplog|FAIL|%s", err)
			continue
		}
		// log.Debug("SegmentLog|Replay|oplog|%s", ol)
		do(&ol)
		//line
		offset += int64(length)

	}
	self.offset = int64(offset)
}

//订阅关系topic下的group发生变更
func (self *BindExchanger) NodeChange(path string, eventType ZkEvent, childNode []string) {

	//如果是订阅关系变更则处理
	if strings.HasPrefix(path, KITEQ_SUB) {
		//获取topic
		split := strings.Split(path, "/")
		if len(split) < 4 {
			if eventType == Created {
				//不合法的订阅璐姐
				log.Error("BindExchanger|NodeChange|INVALID SUB PATH |%s|%t\n", path, childNode)
			}
			return
		}
		//获取topic
		topic := split[3]

		self.lock.Lock()
		defer self.lock.Unlock()
		//如果topic下无订阅分组节点，直接删除该topic
		if len(childNode) <= 0 {
			self.onBindChanged(topic, "", nil)
			log.Error("BindExchanger|NodeChange|无子节点|%s|%s\n", path, childNode)
			return
		}

		// //对当前的topic的分组进行重新设置
		switch eventType {
		case Created, Child:

			bm, err := self.zkmanager.GetBindAndWatch(topic)
			if nil != err {
				log.Error("BindExchanger|NodeChange|获取订阅关系失败|%s|%s\n", path, childNode)
			}

			//如果topic下没有订阅关系分组则青琉璃
			if len(bm) > 0 {
				for groupId, bs := range bm {
					self.onBindChanged(topic, groupId, bs)
				}
			} else {
				//删除具体某个分组
				self.onBindChanged(topic, "", nil)
			}
		}

	} else {
		// log.Warn("BindExchanger|NodeChange|非SUB节点变更|%s|%s\n", path, childNode)
	}
}

//创建物理连接
func dial(hostport string) (*net.TCPConn, error) {
	//连接
	remoteAddr, err_r := net.ResolveTCPAddr("tcp4", hostport)
	if nil != err_r {
		log.Error("KiteClientManager|RECONNECT|RESOLVE ADDR |FAIL|remote:%s\n", err_r)
		return nil, err_r
	}
	conn, err := net.DialTCP("tcp4", nil, remoteAddr)
	if nil != err {
		log.Error("KiteClientManager|RECONNECT|%s|FAIL|%s\n", hostport, err)
		return nil, err
	}

	return conn, nil
}