python通过thrift操作hbase实例

thrift 是facebook开发并开源的一个二进制通讯中间件，通过thrift，我们可以充分利用各个语言的优势，编写高效的代码。

关于thrift的论文：http://pan.baidu.com/share/link?shareid=234128&uk=3238841275

安装thrift：http://thrift.apache.org/docs/install/ubuntu/

安装完成后到hbase的目录下，找到Hbase.thrift，该文件在

hbase-0.94.4/src/main/resources/org/apache/hadoop/hbase/thrift下可以找到

thrift –gen python hbase.thrift 会生成gen-py文件夹，将其修改成hbase

安装python的thrift库

sudo pip install thrift

启动hbase的thrift服务：bin/hbase-daemon.sh start thrift 默认端口是9090

创建hbase表:

from thrift import Thriftfrom thrift.transport import TSocketfrom thrift.transport import TTransportfrom thrift.protocol import TBinaryProtocol  from hbase import Hbasefrom hbase.ttypes import *  transport = TSocket.TSocket('localhost', 9090);  transport = TTransport.TBufferedTransport(transport)  protocol = TBinaryProtocol.TBinaryProtocol(transport);  client = Hbase.Client(protocol)transport.open()    contents = ColumnDescriptor(name='cf:', maxVersions=1)client.createTable('test', [contents])  print client.getTableNames()

执行代码，成功后，进入hbase的shell，用命令list可以看到刚刚的test表已经创建成功。

插入数据：

from thrift import Thriftfrom thrift.transport import TSocketfrom thrift.transport import TTransportfrom thrift.protocol import TBinaryProtocol  from hbase import Hbase  from hbase.ttypes import *  transport = TSocket.TSocket('localhost', 9090)  transport = TTransport.TBufferedTransport(transport)  protocol = TBinaryProtocol.TBinaryProtocol(transport)  client = Hbase.Client(protocol)  transport.open()  row = 'row-key1'  mutations = [Mutation(column="cf:a", value="1")]client.mutateRow('test', row, mutations, None)

获取一行数据：

from thrift import Thriftfrom thrift.transport import TSocketfrom thrift.transport import TTransportfrom thrift.protocol import TBinaryProtocol  from hbase import Hbasefrom hbase.ttypes import *  transport = TSocket.TSocket('localhost', 9090)transport = TTransport.TBufferedTransport(transport)  protocol = TBinaryProtocol.TBinaryProtocol(transport)  client = Hbase.Client(protocol)  transport.open()  tableName = 'test'rowKey = 'row-key1'  result = client.getRow(tableName, rowKey, None)print resultfor r in<strong style="color:transparent">来2源gaodaima#com搞(代@码&网</strong> result:    print 'the row is ' , r.row    print 'the values is ' , r.columns.get('cf:a').value

返回多行则需要使用scan：

from thrift import Thriftfrom thrift.transport import TSocketfrom thrift.transport import TTransportfrom thrift.protocol import TBinaryProtocol  from hbase import Hbasefrom hbase.ttypes import *  transport = TSocket.TSocket('localhost', 9090)transport = TTransport.TBufferedTransport(transport)  protocol = TBinaryProtocol.TBinaryProtocol(transport)  client = Hbase.Client(protocol)transport.open()  scan = TScan()tableName = 'test'id = client.scannerOpenWithScan(tableName, scan, None)  result2 = client.scannerGetList(id, 10)  print result2

scannerGet则是每次只取一行数据：

from thrift import Thriftfrom thrift.transport import TSocketfrom thrift.transport import TTransportfrom thrift.protocol import TBinaryProtocol  from hbase import Hbasefrom hbase.ttypes import *  transport = TSocket.TSocket('localhost', 9090)transport = TTransport.TBufferedTransport(transport)  protocol = TBinaryProtocol.TBinaryProtocol(transport)  client = Hbase.Client(protocol)transport.open()  scan = TScan()tableName = 'test'id = client.scannerOpenWithScan(tableName, scan, None)result = client.scannerGet(id)while result:    print result    result = client.scannerGet(id)

喜欢 (0)赏

[搞代码]

分享 (0)