def dump(connection, collection, database, hdfs, filename, username, hdfsconnection):
client = TokenClient(hdfsconnection, username, root=hdfs)
length = getCollection(connection,database, collection).find().count()
with client.write(filename, encoding='utf-8') as writer:
with click.progressbar(getCollection(connection,database, collection).find(), length=length, label='Writing collection: '+ collection+" to HDFS: "+ filename) as bar:
for j in bar:
writer.write(dumps(j))
def client(self): # type ()-> WebHDFS
if self.client_type == WebHdfsClientType.KERBEROS:
from hdfs.ext.kerberos import KerberosClient
return KerberosClient(
url=self.url,
mutual_authentication=self.mutual_authentication,
service=self.service,
delegate=self.delegate,
force_preemptive=self.force_preemptive,
principal=self.principal,
hostname_override=self.hostname_override,
sanitize_mutual_error_response=self.
sanitize_mutual_error_response,
send_cbt=self.send_cbt,
)
elif self.client_type == WebHdfsClientType.INSECURE:
from hdfs import InsecureClient
return InsecureClient(url=self.url, user=self.user)
elif self.client_type == WebHdfsClientType.TOKEN:
from hdfs import TokenClient
return TokenClient(url=self.url, token=self.token)
else:
raise Exception("WebHdfs client type %s does not exist" %
self.client_type)
from hdfs import TokenClient
client = TokenClient('http://10.91.228.145:50070', 'hdfs',root='/')
print client.list('/user/hdfs/test')
print client.content('/user/hdfs/test')
#client.download(
client.download('/user/hdfs/aichuche/t_reportData101/20140909/1234.txt','f:\\12345.txt')
import psycopg2
import requests
from hdfs import TokenClient
print "Fetching data from the database"
conn = psycopg2.connect(database="NewsSource", user="******", password="******", host="newdb.cnceaogjppz8.us-west-2.rds.amazonaws.com", port="5432")
HDFS_URL = "http://localhost:50070"
cur = conn.cursor()
cur.execute("select id,articletext from articlestable where classifiedcategory IS NULL")
rows = cur.fetchall()
count = 1
for row in rows:
print "Storing file " + str(count) + " in HDFS"
client = TokenClient(HDFS_URL, 'crawled_data', root='/user/root')
client.write(str(row[0]), row[1])
count +=1
conn.close()