python通过thrift操作hbase实例[python高级教程]

  • Z时代
  • 2024-01-10
  • 分类：综合

python通过thrift操作hbase实例[python高级教程]

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：

python;toolbar:false;">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)


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