asyncexample.py

#!/usr/bin/python
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from ctypes import cdll
from argparse import ArgumentParser
from ctypes import cdll
import ctypes
import traceback
import time
import asyncio


"""

This is an Example of using the Python connectors. The example will accept user input
create a table writing arbitrary information to it via the BatchWriter and scanner will put the written data      
     
             
"""

parser = ArgumentParser(description="This is an Apache Accummulo Python connector")

parser.add_argument("-i", "--instance", dest="instance",
                    help="Apache Accumulo Instance Name", required=True)
parser.add_argument("-z", "--zookeepers", dest="zookeepers",
                    help="Comma Separated Zookeeper List", required=True)
parser.add_argument("-u", "--username", dest="username",
                    help="User to access Apache Accumulo", required=True)
parser.add_argument("-p", "--password", dest="password",
                    help="Password to access Apache Accumulo. May also be supplied at the command line")
parser.add_argument("-t", "--table", dest="table",
                    help="Table to create/update")
args = parser.parse_args()

password = args.password
table = args.table

async def printasync(iter):
    async for keyvalue in iter:
        key = keyvalue.getKey()
        print(key.getRow())

if not password:
    print("Please enter your password")
    password = input()
    
if not table:
    table = "blahblahd"

import sharkbite


try:
    connector = sharkbite.AccumuloConnector(args.instance,args.zookeepers,args.username,password)


    table_operations = connector.tableOps(table)

    if not table_operations.exists(False):
        print ("Creating table " + table)
        table_operations.create(False)  
    else:
        print (table + " already exists, so not creating it")  
    
    
    auths = sharkbite.Authorizations()
    
    """ Add authorizations """ 
    """ mutation.put("cf","cq","cv",1569786960) """
    
    writer = table_operations.createWriter(auths, 10)
    
    mutation = sharkbite.Mutation("row2");    
    
    mutation.put("cf","cq","",1569786960, "value")
    mutation.put("cf2","cq2","",1569786960, "value2")
    """ no value """
    mutation.put("cf3","cq3","",1569786960, "") 
    
    writer.addMutation( mutation )
    
    writer.close()
    
    time.sleep(2)
    
    """ auths.addAuthorization("cv") """
    
    scanner = table_operations.createScanner(auths, 2)
    
    startKey = sharkbite.Key()
    
    endKey = sharkbite.Key()
    
    startKey.setRow("row")
    
    endKey.setRow("row3")
    
    range = sharkbite.Range(startKey,True,endKey,False)
    
    scanner.addRange( range )
    
    resultset = scanner.getResultSet()
    
    loop = asyncio.get_event_loop()
    loop.run_until_complete(printasync(resultset))
        
    
    """ delete your table if user did not create temp """
    if not args.table:
        table_operations.remove()
    
except RuntimeError as e:
     traceback.print_exc()
     print("Oops, error caused: " + str(e))