bug fixes and enhancements, added console output(for logging)

bin/transport

@@ -53,148 +53,29 @@ if len(sys.argv) > 1:
         
         i += 2
 
-class Post(Process):
+if __name__ == '__main__' :
-	def __init__(self,**args):
+	#
-		super().__init__()
+	# Load information from the file ...
-		
+	if 'help' in SYS_ARGS :
-		if 'provider' not in args['target'] :
+		print (__doc__)
-			self.PROVIDER = args['target']['type']
-			self.writer = 	transport.factory.instance(**args['target'])
 	else:
-			self.PROVIDER = args['target']['provider']
-			args['target']['context'] = 'write'
-			self.store = args['target']
-			# self.writer = transport.instance(**args['target'])
-		#
-		# If the table doesn't exists maybe create it ?
-		#
-		self.rows 	=	 args['rows'].fillna('')
-		
-		
-	def run(self):
-		_info = {"values":self.rows} if 'couch' in self.PROVIDER else self.rows	
-		ltypes = self.rows.dtypes.values
-		columns = self.rows.dtypes.index.tolist()
-		# if not self.writer.has() :
-
-			
-			# self.writer.make(fields=columns)
-			# self.log(module='write',action='make-table',input={"name":self.writer.table})
-		for name in columns :
-			if _info[name].dtype in ['int32','int64','int','float','float32','float64'] :
-				value = 0
-			else:
-				value = ''
-			_info[name] = _info[name].fillna(value)
-		writer = transport.factory.instance(**self.store)
-		writer.write(_info)
-		writer.close()
-
-		
-class ETL (Process):
-	def __init__(self,**_args):
-		super().__init__()
-		
-		self.name 	= _args['id']
-		if 'provider' not in _args['source'] :
-			#@deprecate
-			self.reader = transport.factory.instance(**_args['source'])
-		else:
-			#
-			# This is the new interface
-			_args['source']['context'] = 'read'	
-			
-			self.reader = transport.instance(**_args['source'])
-		#
-		# do we have an sql query provided or not ....
-		# self.sql = _args['source']['sql'] if 'sql' in _args['source'] else None
-		self.cmd = _args['source']['cmd'] if 'cmd' in _args['source'] else None
-		self._oargs = _args['target'] #transport.factory.instance(**_args['target'])
-		self.JOB_COUNT =  _args['jobs']
-		self.jobs = []
-		# self.logger = transport.factory.instance(**_args['logger'])
-	def log(self,**_args) :
-		_args['name']  = self.name
-		print (_args)
-	def run(self):
-		if self.cmd :
-			idf = self.reader.read(**self.cmd)
-		else:
-			idf = self.reader.read() 
-		idf = pd.DataFrame(idf)		
-		# idf = idf.replace({np.nan: None}, inplace = True)
-
-		idf.columns = [str(name).replace("b'",'').replace("'","").strip() for name in idf.columns.tolist()]
-		self.log(rows=idf.shape[0],cols=idf.shape[1],jobs=self.JOB_COUNT)
-
-		#
-		# writing the data to a designated data source 
-		#
 		try:
+			_info = json.loads(open(SYS_ARGS['config']).read())
+			if 'index' in SYS_ARGS :
+				_index = int(SYS_ARGS['index'])
+				_info = [_item for _item in _info if _info.index(_item) == _index]
+				pass
 			
-			
+			procs = 1 if 'procs' not in SYS_ARGS else int(SYS_ARGS['procs'])
-			self.log(module='write',action='partitioning')
+			jobs = transport.factory.instance(provider='etl',info=_info,procs=procs)
-			rows = np.array_split(np.arange(0,idf.shape[0]),self.JOB_COUNT)
+			while jobs :
-			
+				x = len(jobs)
-			#
+				jobs = [_job for _job in jobs if _job.is_alive()]
-			# @TODO: locks
+				if x != len(jobs) :
-			for i in np.arange(self.JOB_COUNT) :
+					print ([len(jobs),'... jobs running'])
-				_id = 'segment # '.join([str(i),' ',self.name])
+				time.sleep(1)
-				indexes = rows[i]
-				segment = idf.loc[indexes,:].copy() #.to_dict(orient='records')
-				if segment.shape[0] == 0 :
-					continue
-				proc = Post(target = self._oargs,rows = segment,name=_id)
-				self.jobs.append(proc)
-				proc.start()
-
-				self.log(module='write',action='working',segment=_id)
-			# while poc :
-			# 	proc = [job for job in proc if job.is_alive()]
-			# 	time.sleep(1)
 		except Exception as e:
+			
 			print (e)
 			
-	def is_done(self):
-		self.jobs = [proc for proc in self.jobs if proc.is_alive()]
-		return len(self.jobs) == 0
-def apply(_args) :
-	"""
-	This function will apply a set of commands against a data-store. The expected structure is as follows :
-	{"store":...,"apply":[]}	
-	"""
-	handler = transport.factory.instance(**_args['store'])
-	for cmd in _args['apply'] :
-		handler.apply(cmd)
-	handler.close()
-if __name__ == '__main__' :
-	_info = json.loads(open (SYS_ARGS['config']).read())
-	index = int(SYS_ARGS['index']) if 'index' in SYS_ARGS else None
-	procs = []
-	for _config in _info :
-		if 'source' in SYS_ARGS :
-			_config['source'] = {"type":"disk.DiskReader","args":{"path":SYS_ARGS['source'],"delimiter":","}}
 	
-		_config['jobs']  = 3 if 'jobs' not in SYS_ARGS else int(SYS_ARGS['jobs'])
-		etl = ETL (**_config)
-		if index is None:	
-			
-			etl.start()
-			procs.append(etl)
-		
-		elif _info.index(_config) == index :
-			
-			# print (_config)
-			procs = [etl]
-			etl.start()
-			break
-	#
-	#
-	N = len(procs)
-	while procs :
-		procs = [thread for thread in procs if not thread.is_done()]
-		if len(procs) < N :
-			print (["Finished ",(N-len(procs)), " remaining ", len(procs)])
-			N = len(procs)
-		time.sleep(1)
-	print ("We're done !!")

setup.py

@@ -8,12 +8,12 @@ def read(fname):
     return open(os.path.join(os.path.dirname(__file__), fname)).read() 
 args    = {
     "name":"data-transport",
-    "version":"1.4.6",
+    "version":"1.4.8",
     "author":"The Phi Technology LLC","author_email":"info@the-phi.com",
     "license":"MIT",
     "packages":["transport"]}
 args["keywords"]=['mongodb','couchdb','rabbitmq','file','read','write','s3','sqlite']
-args["install_requires"] = ['pymongo','sqlalchemy','pandas','numpy','cloudant','pika','nzpy','boto3','boto','pyarrow','google-cloud-bigquery','google-cloud-bigquery-storage','flask-session','smart_open','botocore','psycopg2-binary','mysql-connector-python']
+args["install_requires"] = ['pymongo','sqlalchemy','pandas','pandas-gbq','numpy','cloudant','pika','nzpy','boto3','boto','pyarrow','google-cloud-bigquery','google-cloud-bigquery-storage','flask-session','smart_open','botocore','psycopg2-binary','mysql-connector-python']
 args["url"] =   "https://healthcareio.the-phi.com/git/code/transport.git"
 args['scripts'] = ['bin/transport']
 if sys.version_info[0] == 2 :

transport/__init__.py

@@ -28,7 +28,7 @@ import importlib
 import sys 
 import sqlalchemy
 if sys.version_info[0] > 2 : 
-    from transport.common import Reader, Writer #, factory
+	from transport.common import Reader, Writer,Console #, factory
 	from transport import disk
 
 	from transport import s3 as s3
@@ -36,14 +36,16 @@ if sys.version_info[0] > 2 :
 	from transport import couch as couch
 	from transport import mongo as mongo
 	from transport import sql as sql
+	from transport import etl as etl
 else:
-    from common import Reader, Writer #, factory
+	from common import Reader, Writer,Console #, factory
 	import disk
 	import queue
 	import couch
 	import mongo
 	import s3
 	import sql
+	import etl
 import psycopg2 as pg
 import mysql.connector as my
 from google.cloud import bigquery as bq
@@ -51,9 +53,12 @@ import nzpy as nz   #--- netezza drivers
 import os
 
 
+
 class factory :
 	TYPE = {"sql":{"providers":["postgresql","mysql","neteeza","bigquery","mariadb","redshift"]}}
 	PROVIDERS = {
+		"etl":{"class":{"read":etl.instance}},
+		"console":{"class":{"write":Console,"read":Console}},
 		"file":{"class":{"read":disk.DiskReader,"write":disk.DiskWriter}},
 		"sqlite":{"class":{"read":disk.SQLiteReader,"write":disk.SQLiteWriter}},
         "postgresql":{"port":5432,"host":"localhost","database":os.environ['USER'],"driver":pg,"default":{"type":"VARCHAR"}},
@@ -140,8 +145,9 @@ def instance(**_args):
 		#
 		# Let us try to establish an sqlalchemy wrapper
 		try:
+			
 			host = ''
-			if provider not in ['bigquery','mongodb','couchdb','sqlite'] :
+			if provider not in ['bigquery','mongodb','couchdb','sqlite','console','etl','file'] :
 				#
 				# In these cases we are assuming RDBMS and thus would exclude NoSQL and BigQuery
 				username = args['username'] if 'username' in args else ''
@@ -159,7 +165,7 @@ def instance(**_args):
 				account = ''
 				host = ''
 				database = args['path'] if 'path' in args else args['database']
-			if provider not in ['mongodb','couchdb','bigquery'] :
+			if provider not in ['mongodb','couchdb','bigquery','console','etl','file'] :
 				uri = ''.join([provider,"://",account,host,'/',database])
 				
 				e = sqlalchemy.create_engine (uri,future=True)

transport/common.py

@@ -21,6 +21,7 @@ __author__ = 'The Phi Technology'
 import numpy as np
 import json
 import importlib 
+from multiprocessing import RLock
 # import couch
 # import mongo
 class IO:
@@ -89,6 +90,29 @@ class ReadWriter(Reader,Writer) :
 	This class implements the read/write functions aggregated
 	"""
 	pass
+class Console(Writer):
+	lock = RLock()
+	def __init__(self,**_args):
+		self.lock = _args['lock'] if 'lock' in _args else False
+		self.info = self.write
+		self.debug = self.write
+		self.log = self.write
+		pass
+	def write (self,info,**_args):
+		if self.lock :
+			Console.lock.acquire()
+		try:
+			if type(info) == list:
+				for row in info :
+					print (row)
+			else:
+				print (info)
+		except Exception as e :
+			print (e)
+		finally:
+			if self.lock :
+				Console.lock.release()
+	
 # class factory :
 # 	@staticmethod
 # 	def instance(**args):

transport/disk.py

@@ -21,14 +21,17 @@ class DiskReader(Reader) :
 		"""
 
 		Reader.__init__(self)
-		self.path 		= params['path'] ;
+		self.path 		= params['path'] if 'path' in params else None
 		self.delimiter	= params['delimiter'] if 'delimiter' in params else ','
+		
 	def isready(self):
 		return os.path.exists(self.path) 
+	def meta(self,**_args):
+		return []
 	def read(self,**args):
 		_path = self.path if 'path' not in args else args['path']
 		_delimiter = self.delimiter if 'delimiter' not in args else args['delimiter']
-		return pd.read_csv(self.path,delimiter=self.delimiter)
+		return pd.read_csv(_path,delimiter=self.delimiter)
 	def stream(self,**args):
 		"""
 		This function reads the rows from a designated location on disk
@@ -84,15 +87,16 @@ class DiskWriter(Writer):
 		self.cache['meta']['cols'] += len(row) if isinstance(row,list) else len(row.keys())
 		self.cache['meta']['rows'] += 1
 		return (self.delimiter.join(row) if self.delimiter else json.dumps(row))+"\n"
-	def write(self,info):
+	def write(self,info,**_args):
 		"""
 			This function writes a record to a designated file
 			@param	label	<passed|broken|fixed|stats>
 			@param	row	row to be written
 		"""
 		try:
+			_mode = 'a' if 'overwrite' not in _args else 'w'
 			DiskWriter.THREAD_LOCK.acquire()
-			f = open(self.path,'a')
+			f = open(self.path,_mode)
 			if self.delimiter :
 				if type(info) == list :
 					for row in info :