def __init__(self, connection, create_tbl, values_tbl):
self._connection = connection
self._create_tbl = create_tbl
self._values_tbl = values_tbl
self._hive = HBaseHive()
class HBaseParse:
_create_tbl = None
_values_tbl = None
_connection = None # bare connection, no reference to the namespace
_hbase_time = 0
def __init__(self, connection, create_tbl, values_tbl):
self._connection = connection
self._create_tbl = create_tbl
self._values_tbl = values_tbl
self._hive = HBaseHive()
def __del__(self):
self._connection.close()
def create_stmt(self, sqldump_key, tbl_name):
row = self._create_tbl.row(sqldump_key, ["tables:"+tbl_name])
return row["tables:"+tbl_name]
def view_stmt(self, sqldump_key, view_name):
row = self._create_tbl.row(sqldump_key, ["views:"+view_name])
return row["views:"+view_name]
def inserts(self, sqldump_key, tbl_name):
row = self._create_tbl.row(sqldump_key, ["hashes:"+tbl_name])
if "hashes:"+tbl_name not in row:
print >> sys.stderr, " - MISSING DATA",
return []
return eval(row["hashes:"+tbl_name])
def all_inserts(self, tbl_name):
s = self._create_tbl.scan(columns=["hashes:"+tbl_name])
return sorted([ (k, eval(v["hashes:"+tbl_name])) for k,v in s])
def get_tables(self, sqldump_key):
row = self._create_tbl.row(sqldump_key, ["tables"])
# getting the list of CREATE statements, I'd expect to
# step on an exception when then accessing the HASHES
# this shall work out as a sort of consistency check
return sorted([k.split(":")[1] for k in row.keys()])
def get_views(self, sqldump_key):
row = self._create_tbl.row(sqldump_key, ["views"])
return sorted([k.split(":")[1] for k in row.keys()])
def values(self, insert_key, tbl_name):
row = self._values_tbl.row(insert_key, ["values:"+tbl_name])
return eval("["+row["values:"+tbl_name]+"]") # a list of tuples
def desired_tables(self, sqldump_key, include):
for tbl_name in self.get_tables(sqldump_key):
if tbl_name in include:
self.ingest(sqldump_key, tbl_name)
def all_except_some(self, sqldump_key, exclude):
for tbl_name in self.get_tables(sqldump_key):
if tbl_name not in exclude:
self.ingest(sqldump_key, tbl_name)
def ingest(self, sqldump_key, tbl_name):
tbl_def = schema(self.create_stmt(sqldump_key, tbl_name))
self._hive.create_hive(self._connection.table_prefix, tbl_name, tbl_def)
if os.environ.get('ONLYHIVE') is not None: return
if tbl_name not in self._connection.tables():
print "OVER-WRITING>", tbl_name, sqldump_key; sys.stdout.flush()
self.drop_create(tbl_name) # FIXME! we to handle it differently
if not self.has_data(tbl_name):
# there are no data* => RE-INGEST, due to HBASE-5241
# * we are looking in the past, there might be
# data if we look ahead (more recent timestamp)
# but we want to PRESERVE those data...
# an alternative would be to WIPE the table
self.bulk_intake(sqldump_key, tbl_name, tbl_def)
else: self.incremental_intake(sqldump_key, tbl_name, tbl_def)
def bulk_intake(self, sqldump_key, tbl_name, tbl_def):
print " --- each . (dot) might be a 16Mb chunk of data",
print "<", "%s[%s]" % (tbl_name, sqldump_key)
for mysql_insert_md5 in self.inserts(sqldump_key, tbl_name):
print ".",
sys.stdout.flush()
b = self._connection.table(tbl_name).batch(timestamp=int(sqldump_key))
mysql_insert_data = self.values(mysql_insert_md5, tbl_name)
data = [map_hbase(tbl_def, row) for row in mysql_insert_data]
self.batch(b, data)
print ""
def batch(self, hbase_batch, data, deletes={}):
for row_key, columns in data:
hbase_batch.put(row_key.zfill(KEYDIGITS), columns)
# here are separate batches for the deletes
#for timestamp_, list_ in deletes.iteritems():
# stone_batch = self._connection.table(
# hbase_batch.table.name, use_prefix=False
# ).batch(timestamp=int(timestamp_))
# for row in list_:
# row_key, columns_ = row
# stone_batch.delete(row_key, columns=columns_)
# if os.environ.get('NOSEND') is None: stone_batch.send()
# FIXME! disabled until HBASE-5241 gets fixed
# when moving data towards the past, we better first delete, then write
if os.environ.get('NOSEND') is not None: print "- NOT sent! -" ; return
else: hbase_batch.send()
def incremental_intake(self, sqldump_key, tbl_name, tbl_def):
stones = milestones(self.all_inserts(tbl_name))
timestamps = [ stone[0] for stone in stones ]
i = timestamps.index(sqldump_key)
prev_, next_ = in_between(timestamps, i)
print tbl_name, (i, len(timestamps)-1), (prev_, next_), stones[i]
sys.stdout.flush() # weird, on Jenkins stdout gets buffered
# k, let's operate...
table = self._connection.table(tbl_name)
for mysql_insert_md5 in stones[i][1]:
mysql_insert_data = self.values(mysql_insert_md5, tbl_name)
data = [map_hbase(tbl_def, row) for row in mysql_insert_data]
id_first, id_last =self.id_tuples(data)
hbase_time = time.time()
scan_prev = table.scan(row_start=str(id_first).zfill(KEYDIGITS),
row_stop=str(id_last+1).zfill(KEYDIGITS),
timestamp=int(prev_)+1,
include_timestamp=True)
data_prev = [(k,v) for k,v in scan_prev]
scan_next = table.scan(row_start=str(id_first).zfill(KEYDIGITS),
row_stop=str(id_last+1).zfill(KEYDIGITS),
timestamp=int(next_)+1,
include_timestamp=True)
data_next = [(k,v) for k,v in scan_next]
delta_time = int(time.time() - hbase_time)
self._hbase_time += delta_time
if os.environ.get('DEBUG') is not None:
print >> sys.stderr, "\t - spent at HBASE (delta, overall) seconds:",
print >> sys.stderr, (delta_time, self._hbase_time)
data_diff, deletes = diff_datasets((sqldump_key,data),
(prev_, data_prev),
(next_, data_next))
b = self._connection.table(tbl_name).batch(timestamp=int(sqldump_key))
self.batch(b, data_diff, deletes)
# weird, on Jenkins stdout gets buffered
sys.stdout.flush()
sys.stderr.flush()
def id_tuples(self, data):
if len(data) == 0: raise RuntimeError("NO DATA???")
sorted_ids = tuple(sorted(int(d[0]) for d in data))
return (sorted_ids[0], sorted_ids[-1])
def has_data(self, tbl_name):
data_scanner = self._connection.table(tbl_name).scan(
filter="KeyOnlyFilter()",
include_timestamp=True,
limit=1)
data = [(k,v) for k,v in data_scanner]
if len(data) != 0: return True
return False
def drop_create(self, tbl_name):
try: self.create(tbl_name)
except:
if os.environ.get('DEBUG') is not None:
print >> sys.stderr, " - DROP/CREATE",
self.drop(tbl_name)
self.create(tbl_name)
def create(self, tbl_name):
self._connection.create_table(tbl_name,
{'mysql': __compressed_historize__}
)
def drop(self, tbl_name):
try: self._connection.disable_table(tbl_name)
except: print tbl_name, "... already disabled, deleting"
finally: self._connection.delete_table(tbl_name)
