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 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)