python通过thrift操作hbase实例

thrift 是非死book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 Thrift  from thrift.transport import TSocket  from thrift.transport import TTransport  from 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()        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 Thrift  from thrift.transport import TSocket  from thrift.transport import TTransport  from 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 Thrift  from thrift.transport import TSocket  from thrift.transport import TTransport  from 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()     tableName = 'test'  rowKey = 'row-key1'     result = client.getRow(tableName, rowKey, None)  print result  for r in 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 Thrift  from thrift.transport import TSocket  from thrift.transport import TTransport  from 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()     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 Thrift  from thrift.transport import TSocket  from thrift.transport import TTransport  from 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()     scan = TScan()  tableName = 'test'  id = client.scannerOpenWithScan(tableName, scan, None)  result = client.scannerGet(id)  while result:      print result      result = client.scannerGet(id)