Detaillierte Erläuterung von Beispielen für Python-Aufrufe von HBase

tar xzf thrift-0.7.0-dev.tar.gz
cd thrift-0.7.0-dev
sudo ./configure --with-cpp=no --with-ruby=no
sudo make
sudo make install

from unittest import TestCase, main
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 ColumnDescriptor, Mutation, BatchMutation
class HBaseTester:

  def __init__(self, netloc, port, table="staftesttable"):
    self.tableName = table

    self.transport = TTransport.TBufferedTransport(
      TSocket.TSocket(netloc, port))
    self.protocol = TBinaryProtocol.TBinaryProtocol(self.transport)
    self.client = Hbase.Client(self.protocol)
    self.transport.open()

    tables = self.client.getTableNames()
    if self.tableName not in tables:
      self.__createTable()

  def __del__(self):
    self.transport.close()

  def __createTable(self):
    name = ColumnDescriptor(name='name')
    foo = ColumnDescriptor(name='foo')

    self.client.createTable(self.tableName,
                [name,foo])
  
  def put(self,key,name,foo):
    name = Mutation(column="name:v", value=name)
    foo = Mutation(column="foo:v",value=foo)
    
    self.client.mutateRow(self.tablename,key,[name,foo])
  
  def scanner(self,column):
    scanner = client.scannerOpen(self.tablename,"",[column])
				r = client.scannerGet(scanner)
				result= []
    while r:
     print r[0]
     result.append(r[0])
     r = client.scannerGet(scanner)
    print "Scanner finished"
    return result
   
  
    
    
    
     
class TestHBaseTester(TestCase):
  
  def setUp(self):
    self.writer = HBaseTester("localhost", 9090)

  def tearDown(self):
    name = self.writer.tableName
    client = self.writer.client
    client.disableTable(name)
    client.deleteTable(name)

  def testCreate(self):
    tableName = self.writer.tableName
    client = self.writer.client
    self.assertTrue(self.writer.tableName in client.getTableNames())
    columns =['name:','foo:']
    for i in client.getColumnDescriptors(tableName):
      self.assertTrue(i in columns)
      
  def testPut(self):
    self.writer.put("r1","n1","f1")
    self.writer.put("r2","n2","f2")
    self.writer.put("r3","n3","")
    self.writer.scanner("name:") 
    
if __name__ == "__main__":
  main()