Golang+Python Hbase Thrift1 基本使用

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Hbase简介:

    HBase是一个分布式的、面向列的开源数据库,该技术来源于 Fay Chang 所撰写的Google论文“Bigtable:一个结构化数据的分布式存储系统”。就像Bigtable利用了Google文件系统(File System)所提供的分布式数据存储一样,HBase在Hadoop之上提供了类似于Bigtable的能力。HBase是Apache的Hadoop项目的子项目。HBase不同于一般的关系数据库,它是一个适合于非结构化数据存储的数据库。另一个不同的是HBase基于列的而不是基于行的模式。

Thrift

Hbase是目前比较火的列存储数据库,由于Hbase是用Java写的,因此它原生地提供了Java接口,对非Java程序人员,怎么办呢?幸好它提供了thrift接口服务器,因此也可以采用其他语言来编写Hbase的客户端,目前的Hbase有两套thrift接口(可以叫thrift和thrift2),它们并不兼容。根据官方文档,thrift很可能被抛弃,目前网上介绍thrift2的比较多,很容易找到阿里的demo, thrift2传送门,所以这里记录一下thrift1的基本使用, thrift1传送门

启动thrift服务:

hbase的bin目录下存在一个脚本:hbase-daemon.sh
运行命令即可(启动thrift2则将thrift改成thrift2即可):

hbase-daemon.sh start thrift

接下来就是golang的基本操作。


Go基本使用:

package main

import (
	"encoding/json"
	"fmt"
	"github.com/sdming/goh"
	"github.com/sdming/goh/Hbase"
)

var address = "xxx.xxx.xxx.xxx:9090"
var tableName = "student_table"
var rowKey = "person_1"
var client *goh.HClient

var columns = []string{"info:name"}
var rows = [][]byte{[]byte(rowKey), []byte(rowKey)}

func CreateTable() (err error) {
	fmt.Println("start to create table:")
	cols := make([]*goh.ColumnDescriptor, 3)
	cols[0] = goh.NewColumnDescriptorDefault("info")
	cols[1] = goh.NewColumnDescriptorDefault("education")
	cols[2] = goh.NewColumnDescriptorDefault("family")
	if exist, err := client.CreateTable(tableName, cols); err != nil {
		fmt.Println(err)
	} else {
		fmt.Println("exist status is:", exist)
	}
	//	fmt.Print("DisableTable:")
	//	fmt.Println(client.DisableTable("test_create"))
	//
	//	fmt.Print("DeleteTable:")
	//	fmt.Println(client.DeleteTable("test_create"))
	//
	return
}

func Get() {
	fmt.Println("Get:")
	if data, err := client.Get(tableName, []byte(rowKey), "info:name", nil); err != nil {
		fmt.Println(err)
	} else {
		PrintCells(data)
	}
	if data, err := client.GetVer(tableName, []byte(rowKey), "info:name", 10, nil); err != nil {
		fmt.Println(err)
	} else {
		PrintCells(data)
	}
}

func DeleteData() {
	fmt.Print("DeleteAll:")
	fmt.Println(client.DeleteAll(tableName, []byte(rowKey), "info:name", nil))

	//fmt.Print("DeleteAllTs:")
	//fmt.Println(client.DeleteAllTs(tableName, []byte(rowKey), "info:name", timestamp, nil))

	fmt.Print("DeleteAllRow:")
	fmt.Println(client.DeleteAllRow(tableName, []byte(rowKey), nil))

	//fmt.Print("Increment:")
	//fmt.Println(client.Increment(goh.NewTIncrement(tableName, []byte(rowKey), "info:age", 64)))

	//fmt.Print("IncrementRows:")
	//fmt.Println(client.IncrementRows([]*Hbase.TIncrement{goh.NewTIncrement(tableName, []byte(rowKey), "info:age", 64)}))

	//fmt.Print("DeleteAllRowTs:")
	//fmt.Println(client.DeleteAllRowTs(tableName, []byte(rowKey), timestamp, nil))

}

func ScanData() (err error) {
	var scanId int32
	scan := &goh.TScan{
		StartRow:     []byte(rowKey),
		StopRow:      []byte(rowKey),
		Timestamp:    0,
		Columns:      []string{"info:name"},
		Caching:      10,
		FilterString: "",
		//FilterString: "substring:value",
	}

	if scanId, err = client.ScannerOpenWithScan(tableName, scan, nil); err != nil {
		fmt.Println(err)
		return
	} else {
		fmt.Println("ScannerOpenWithScan scanId is:", scanId)
	}
	GetDataByScan(scanId)

	if scanId, err = client.ScannerOpen(tableName, []byte(rowKey), columns, nil); err != nil {
		fmt.Println(err)
		return
	} else {
		fmt.Println("ScannerOpen scanId is:", scanId)
	}
	GetDataByScan(scanId)

	if scanId, err = client.ScannerOpenWithStop(tableName, []byte(rowKey), []byte(rowKey), columns, nil); err != nil {
		fmt.Println(err)
		return
	} else {
		fmt.Println("ScannerOpenWithStop scanId is:", scanId)
	}
	GetDataByScan(scanId)

	if scanId, err = client.ScannerOpenWithPrefix(tableName, []byte("per"), columns, nil); err != nil {
		fmt.Println(err)
		return
	} else {
		fmt.Println("ScannerOpenWithPrefix scanId is:", scanId)
	}
	GetDataByScan(scanId)
	return
}

func GetDataByScan(scanId int32) {
	if scanId > 0 {
		fmt.Println("scan start")
		for {
			if data, err := client.ScannerGet(scanId); err != nil {
				fmt.Println(err)
				break
			} else if len(data) == 0 {
				fmt.Println("scan end")
				break
			} else {
				PrintRows(data)
			}
		}

		fmt.Println("ScannerGetList")
		if data, err := client.ScannerGetList(scanId, 1000); err != nil {
			fmt.Println(err)
		} else {
			PrintRows(data)
		}
	}

	if scanId > 0 {
		client.ScannerClose(scanId)
	}
}

func GetRowData() {
	fmt.Println("GetRow:")
	if data, err := client.GetRow(tableName, []byte(rowKey), nil); err != nil {
		fmt.Println(err)
	} else {
		PrintRows(data)
	}

	fmt.Println("GetRowWithColumns:") // 获取指定的column的数据
	if data, err := client.GetRowWithColumns(tableName, []byte(rowKey), columns, nil); err != nil {
		fmt.Println(err)
	} else {
		PrintRows(data)
	}

	fmt.Println("GetRows:")
	if data, err := client.GetRows(tableName, rows, nil); err != nil {
		fmt.Println(err)
	} else {
		PrintRows(data)
	}

	fmt.Println("GetRowsWithColumns:")
	if data, err := client.GetRowsWithColumns(tableName, rows, columns, nil); err != nil {
		fmt.Println(err)
	} else {
		PrintRows(data)
	}

	fmt.Println("GetRowOrBefore:")
	if data, err := client.GetRowOrBefore(tableName, rowKey, "info"); err != nil {
		fmt.Println(err)
	} else {
		PrintCells(data)
	}
}

func GetTableInfo() (err error) {
	fmt.Println("get table names:")
	tableNames, err := client.GetTableNames()
	if err != nil {
		fmt.Println(err)
		return
	} else {
		Dump(tableNames)
	}

	fmt.Println("GetColumnDescriptors:")
	columnInfos, err := client.GetColumnDescriptors(tableName)
	if err != nil {
		fmt.Println(err)
		return
	} else {
		Dump(columnInfos)
	}

	fmt.Println("GetTableRegions:")
	regionInfo, err := client.GetTableRegions(tableName)
	if err != nil {
		fmt.Println(err)
		return
	} else {
		Dump(regionInfo)
	}
	return
}

func SaveData() (err error) {

	infoColumnName := "info"
	var mutations []*Hbase.Mutation
	var rowBatches []*Hbase.BatchMutation

	attributes := make(map[string]string)
	attributes["name"] = "zhang san"
	attributes["age"] = "25"

	for k, v := range attributes {
		columnName := fmt.Sprintf("%s:%s", infoColumnName, k)
		mutation := goh.NewMutation(columnName, []byte(v))
		mutations = append(mutations, mutation)
	}
	fmt.Printf("mutations are:%#v", mutations)
	rowBatches = append(rowBatches, goh.NewBatchMutation([]byte(rowKey), mutations))
	err = client.MutateRows(tableName, rowBatches, nil)
	if err != nil {
		fmt.Println("save data error:", err.Error())
		return
	}
	return
}

func BasicInfo() {
	fmt.Print("IsTableEnabled:")
	fmt.Println(client.IsTableEnabled(tableName))

	fmt.Print("DisableTable:")
	fmt.Println(client.DisableTable(tableName))

	fmt.Print("IsTableEnabled:")
	fmt.Println(client.IsTableEnabled(tableName))

	fmt.Print("EnableTable:")
	fmt.Println(client.EnableTable(tableName))

	fmt.Print("IsTableEnabled:")
	fmt.Println(client.IsTableEnabled(tableName))
}

func init() {
	var err error
	client, err = goh.NewTcpClient(address, goh.TBinaryProtocol, false)
	if err != nil {
		panic(err)
	}
	err = client.Open()
	if err != nil {
		panic(err)
	}
}

func main() {

	defer client.Close()

	//err := CreateTable()
	//if err!=nil{
	//	fmt.Println("error is:",err.Error())
	//	return
	//}
	//
	//err = SaveData()
	//if err!=nil{
	//	fmt.Println("error is:",err.Error())
	//	return
	//}

	//GetRowData()
	//ScanData()
	GetTableInfo()
	fmt.Println("done")

}

func Dump(data interface{}) {
	b, err := json.Marshal(data)
	if err != nil {
		fmt.Println("json marshal error:", err)
		return
	}
	fmt.Println("dump:", string(b))
}

func PrintCells(data []*Hbase.TCell) {
	if data == nil {
		fmt.Println("<nil>")
	}

	l := len(data)
	fmt.Println("[]*Hbase.TCell len:", l)
	for i, x := range data {
		fmt.Println(i, ":", string(x.Value), ";", x.Timestamp)
	}

}

func PrintRows(data []*Hbase.TRowResult) {
	if data == nil {
		fmt.Println("<nil>")
	}

	l := len(data)
	fmt.Println("[]*Hbase.TRowResult len:", l)
	for i, x := range data {
		fmt.Println(i, string(x.Row), "\\n[")
		for k, v := range x.Columns {
			fmt.Println("\\t", k, ":", string(v.Value), v.Timestamp)
		}
		fmt.Println("]")
	}
}

Python 基本操作:

python 采用了happybase,需要先安装一下:
pip install happybase
pip install thrift


import happybase

client = None
address = 'xxx.xxx.xxx.xxx'
table_name = 'python_table'
row_key = 'row_key_one'

def init_client():
    global client
    client = happybase.Connection(address)
    if not client:
        print('failed to connect to server')
        return
    
    print('tables are: {}'.format(client.tables()))


def create_table():

    client.create_table(table_name,{
        'info': dict(max_versions=10),
        'education': dict(max_versions=1, block_cache_enabled=False),
        'family': dict(),  # use defaults
    })
    print('tables are: {}'.format(client.tables()))

def save_data():
    
    table = client.table(table_name)
    info_data = {'info:name': 'wang wu', 'info:age': '20'}
    education_data = {'education:level': 'primary school', 'education:name': 'hope school'}
    family_data = {'family:father': 'wang si', 'family:mother': 'lily'}
    table.put(row=row_key, data=info_data)
    table.put(row=row_key, data=education_data)
    table.put(row=row_key, data=family_data)  # 使用put一次只能存储一行数据 如果row key已经存在,则变成了修改数据


def save_batch_data():
    table = client.table(table_name)
    # batch = table.batch()
    # bat.put(row_key', {'info:name': 'wang wu', 'info:age': '20'})
    # bat.send() # 显示地发送
    # batch将数据保存在内存中,知道数据被send,第一种send数据的方法是显示地发送,即bat.send(),第二种send数据的方法是到达with上下文管理器的结尾自动发送。
    # 这样就存在一个问题,万一数据量很大ÿ

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