adding templates to the class hierarchies, helps with wizard

bin/transport

@@ -104,7 +104,7 @@ def generate (path:Annotated[str,typer.Argument(help="path of the ETL configurat
             {
                 "source":{"provider":"http","url":"https://raw.githubusercontent.com/codeforamerica/ohana-api/master/data/sample-csv/addresses.csv"},
                 "target":
-            [{"provider":"files","path":"addresses.csv","delimiter":","},{"provider":"sqlite","database":"sample.db3","table":"addresses"}]
+            [{"provider":"files","path":"addresses.csv","delimiter":","},{"provider":"sqlite3","database":"sample.db3","table":"addresses"}]
             }
             ]
     file = open(path,'w')

info/__init__.py

@@ -1,6 +1,6 @@
 __app_name__  = 'data-transport'
 __author__ = 'The Phi Technology'
-__version__= '2.4.0'
+__version__= '2.4.4'
 __email__  = "info@the-phi.com"
 __license__=f"""
 Copyright 2010 - 2024, Steve L. Nyemba

transport/__init__.py

@@ -38,11 +38,16 @@ def init():
             if _provider_name.startswith('__') or _provider_name == 'common':
                 continue
             PROVIDERS[_provider_name] = {'module':getattr(_module,_provider_name),'type':_module.__name__}
-def _getauthfile (path) :
-    f = open(path)
-    _object = json.loads(f.read())
-    f.close()
-    return _object
+    #
+    # loading the registry
+    if not registry.isloaded() :
+        registry.load()
+
+# def _getauthfile (path) :
+#     f = open(path)
+#     _object = json.loads(f.read())
+#     f.close()
+#     return _object
 def instance (**_args):
     """
     This function returns an object of to read or write from a supported database provider/vendor
@@ -52,15 +57,6 @@ def instance (**_args):
     kwargs      These are arguments that are provider/vendor specific
     """
     global PROVIDERS
-    # if not registry.isloaded () :
-    #     if ('path' in _args and registry.exists(_args['path'] )) or registry.exists():
-    #         registry.load() if 'path' not in _args else registry.load(_args['path'])
-    #         print ([' GOT IT'])
-    # if 'label' in _args and registry.isloaded():
-    #     _info = registry.get(_args['label'])
-    #     if _info :
-    #         #
-    #         _args = dict(_args,**_info)
     
     if 'auth_file' in _args:
         if os.path.exists(_args['auth_file']) :
@@ -87,8 +83,6 @@ def instance (**_args):
         else:
             _info = registry.get()    
         if _info :
-            #
-            # _args = dict(_args,**_info)
             _args = dict(_info,**_args) #-- we can override the registry parameters with our own arguments
 
     if 'provider' in _args and _args['provider'] in PROVIDERS :
@@ -119,9 +113,27 @@ def instance (**_args):
         #         for _delegate in _params :
         #             loader.set(_delegate)
         
-        loader = None if 'plugins' not in _args else _args['plugins']
+        _plugins = None if 'plugins' not in _args else _args['plugins']
         
-        return IReader(_agent,loader) if _context == 'read' else IWriter(_agent,loader)
+        # if registry.has('logger') :
+        #     _kwa = registry.get('logger')
+        #     _lmodule = getPROVIDERS[_kwa['provider']]
+            
+        if ('label' not in _args and registry.has('logger')):
+            #
+            # We did not request label called logger, so we are setting up a logger if it is specified in the registry
+            #
+            _kwargs = registry.get('logger')
+            _kwargs['context']  = 'write'
+            _kwargs['table']    =_module.__name__.split('.')[-1]+'_logs'
+            # _logger = instance(**_kwargs)
+            _module = PROVIDERS[_kwargs['provider']]['module']
+            _logger = getattr(_module,'Writer')
+            _logger = _logger(**_kwargs)
+        else:
+            _logger = None
+        _datatransport =  IReader(_agent,_plugins,_logger) if _context == 'read' else IWriter(_agent,_plugins,_logger)
+        return _datatransport
 
     else:
         #
@@ -138,7 +150,14 @@ class get :
         if not _args or ('provider' not in _args and 'label' not in _args):
             _args['label'] = 'default'
         _args['context'] = 'read'
-        return instance(**_args)
+        # return instance(**_args)
+        # _args['logger'] = instance(**{'label':'logger','context':'write','table':'logs'})
+        
+        _handler =  instance(**_args)
+        # _handler.setLogger(get.logger())
+        return _handler
+
+    
     @staticmethod
     def writer(**_args):
         """
@@ -147,10 +166,26 @@ class get :
         if not _args or ('provider' not in _args and 'label' not in _args):
             _args['label'] = 'default'
         _args['context'] = 'write'
-        return instance(**_args)
+        # _args['logger'] = instance(**{'label':'logger','context':'write','table':'logs'})
+
+        _handler =  instance(**_args)
+        #
+        # Implementing logging with the 'eat-your-own-dog-food' approach
+        # Using dependency injection to set the logger (problem with imports)
+        #
+        # _handler.setLogger(get.logger())
+        return _handler
+    @staticmethod
+    def logger ():
+        if registry.has('logger') :
+            _args = registry.get('logger')
+            _args['context']  = 'write'
+            return instance(**_args)
+        return None
     @staticmethod
     def etl (**_args):
         if 'source' in _args and 'target' in _args :
+
             return IETL(**_args)
         else:
             raise Exception ("Malformed input found, object must have both 'source' and 'target' attributes")

transport/cloud/bigquery.py

@@ -15,6 +15,7 @@ import time
 
 MAX_CHUNK = 2000000
 class BigQuery:
+    __template__= {"private_key":None,"dataset":None,"table":None}
     def __init__(self,**_args):
         path = _args['service_key'] if 'service_key' in _args else _args['private_key']
         self.credentials = service_account.Credentials.from_service_account_file(path)

transport/cloud/databricks.py

@@ -26,6 +26,7 @@ class Bricks:
     :cluster_path
     :table
     """
+    __template__ = {"host":None,"token":None,"cluster_path":None,"catalog":None,"schema":None}
     def __init__(self,**_args):
         _host = _args['host']
         _token= _args['token']

transport/cloud/nextcloud.py

@@ -10,6 +10,7 @@ import json
 import nextcloud_client as nextcloud
 
 class Nextcloud :
+    __template__={"url":None,"token":None,"uid":None,"file":None}
     def __init__(self,**_args):
         pass
         self._delimiter = None

transport/cloud/s3.py

@@ -24,6 +24,7 @@ class s3 :
 	"""
 		@TODO: Implement a search function for a file given a bucket??
 	"""
+	__template__={"access_key":None,"secret_key":None,"bucket":None,"file":None,"region":None}
 	def __init__(self,**args) :
 		"""
 			This function will extract a file or set of files from s3 bucket provided

transport/iowrapper.py

@@ -8,24 +8,51 @@ NOTE: Plugins are converted to a pipeline, so we apply a pipeline when reading o
 from transport.plugins import PluginLoader
 import transport
 from transport import providers
-from multiprocessing import Process
+from multiprocessing import Process, RLock
 import time
 import types
 from . import registry
-
+from datetime import datetime
+import pandas as pd
+import os
+import sys
+import itertools
+import json
 
 class IO:
     """
     Base wrapper class for read/write and support for logs
     """
-    def __init__(self,_agent,plugins):
+    def __init__(self,_agent,plugins,_logger=None):
+        
+        #
+        # We need to initialize the logger here ...
+        #
+        # registry.init()
+        
+        self._logger = _logger if not type(_agent) in [IReader,IWriter] else _agent._logger #transport.get.writer(label='logger') #if registry.has('logger') else None
+        # if not _logger and hasattr(_agent,'_logger') :
+        #     self._logger = getattr(_agent,'_logger')
         self._agent = _agent
+        _date = _date = str(datetime.now())
+        self._logTable = 'logs' #'_'.join(['logs',_date[:10]+_date[11:19]]).replace(':','').replace('-','_')
         
         if plugins :
             self._init_plugins(plugins)
         else:
             self._plugins = None
-        
+    def setLogger(self,_logger):
+        self._logger = _logger        
+    def log (self,**_args):
+        if self._logger :
+            _date = str(datetime.now())                                    
+            _data = dict({'pid':os.getpid(),'date':_date[:10],'time':_date[11:19]},**_args)
+            for key in _data :
+                _data[key] = str(_data[key]) if type(_data[key]) not in [list,dict] else json.dumps(_data[key])
+            self._logger.write(pd.DataFrame([_data])) #,table=self._logTable)
+        else:
+            print ([' ********** '])
+            print (_args)
     def _init_plugins(self,_items):
         """
         This function will load pipelined functions as a plugin loader
@@ -33,6 +60,7 @@ class IO:
         registry.plugins.init()
         self._plugins = PluginLoader(registry=registry.plugins)
         [self._plugins.set(_name) for _name in _items]
+        self.log(action='init-plugins',caller='read', input =[_name for _name in _items])
         # if 'path' in _args and 'names' in _args :
         #     self._plugins = PluginLoader(**_args)
         # else:
@@ -69,38 +97,74 @@ class IReader(IO):
     """
     This is a wrapper for read functionalities
     """
-    def __init__(self,_agent,pipeline=None):
-        super().__init__(_agent,pipeline)
+    def __init__(self,_agent,_plugins=None,_logger=None):
+        super().__init__(_agent,_plugins,_logger)
         
     def _stream (self,_data ):
+        # self.log(action='streaming',object=self._agent._engine.name, input= type(_data).__name__)
+        _shape = []
         for _segment in _data :     
+            _shape.append(list(_segment.shape))
+            yield self._plugins.apply(_segment,self.log)
+    
+        self.log(action='streaming',object=self._agent._engine.name, input= {'shape':_shape})
         
-            yield self._plugins.apply(_segment)
     def read(self,**_args):
-        if 'plugins' in _args :
-            self._init_plugins(_args['plugins'])
-        _data = self._agent.read(**_args)
         
-        if self._plugins and self._plugins.ratio() > 0 :
+        if 'plugins' in _args :
             
-            if types.GeneratorType == type(_data):
+            self._init_plugins(_args['plugins'])
         
-               return self._stream(_data)
+        _data = self._agent.read(**_args)
+        _objectName = '.'.join([self._agent.__class__.__module__,self._agent.__class__.__name__])
+        if types.GeneratorType == type(_data):
+            if self._plugins :
+                return self._stream(_data) 
             else:
-                _data = self._plugins.apply(_data)
-                return _data
+                _count = 0
+                for _segment in _data :
+                    _count += 1
+                    yield _segment
+                self.log(action='streaming',object=_objectName, input= {'segments':_count})
+                # return _data
         else:
+            
+            
+            self.log(action='read',object=_objectName, input=_data.shape)
+            if self._plugins :
+                _logs = []
+                _data = self._plugins.apply(_data,self.log)
             return _data
+            
+        # if self._plugins and self._plugins.ratio() > 0 :
+            
+        #     if types.GeneratorType == type(_data):
+            
+        #        return self._stream(_data)
+        #     else:
+        #         _data = self._plugins.apply(_data)
+        #         return _data
+        # else:
+        #     self.log(action='read',object=self._agent._engine.name, input=_data.shape)
+        #     return _data
 class IWriter(IO):
-    def __init__(self,_agent,pipeline=None):
-        super().__init__(_agent,pipeline)  
+    lock = RLock()
+    def __init__(self,_agent,pipeline=None,_logger=None):
+        super().__init__(_agent,pipeline,_logger)  
     def write(self,_data,**_args):
         if 'plugins' in _args :
             self._init_plugins(_args['plugins'])
         if self._plugins and self._plugins.ratio() > 0 :
-            _data = self._plugins.apply(_data)
+            _logs = []
+            _data = self._plugins.apply(_data,_logs,self.log)
             
-        self._agent.write(_data,**_args)
+            # [self.log(**_item) for _item in _logs]
+        try:
+            # IWriter.lock.acquire()
+            self._agent.write(_data,**_args)
+        finally:
+            # IWriter.lock.release()
+            pass
 
 #
 # The ETL object in its simplest form is an aggregation of read/write objects
@@ -111,8 +175,13 @@ class IETL(IReader) :
     This class performs an ETL operation by ineriting a read and adding writes as pipeline functions
     """
     def __init__(self,**_args):
-        super().__init__(transport.get.reader(**_args['source']))
+        _source = _args['source']
+        _plugins = _source['plugins'] if 'plugins' in _source else None
         
+        # super().__init__(transport.get.reader(**_args['source']))
+        super().__init__(transport.get.reader(**_source),_plugins)
+        
+        # _logger = 
         if 'target' in _args:
             self._targets = _args['target'] if type(_args['target']) == list else [_args['target']]
         else:
@@ -121,25 +190,25 @@ class IETL(IReader) :
         #
         # If the parent is already multiprocessing
         self._hasParentProcess = False if 'hasParentProcess' not in _args else _args['hasParentProcess']
-    def run(self) :
-        """
-        We should apply the etl here, if we are in multiprocessing mode
-        """
-        _data = super().read()
-        for _kwargs in self._targets :
-            self.post(_data,**_kwargs)
-
-    def read(self,**_args):
+    # def run(self) :
+    #     """
+    #     We should apply the etl here, if we are in multiprocessing mode
+    #     """
+    #     return self.read()
+    def run(self,**_args):
         _data = super().read(**_args)
+        self._targets = [transport.get.writer(**_kwargs) for _kwargs in self._targets]
         if types.GeneratorType == type(_data):
+            _index = 0
             for _segment in _data :
-                for _kwars in self._targets :
-                    self.post(_segment,**_kwargs)
+                _index += 1
+                for _writer in self._targets :
+                    self.post(_segment,writer=_writer,index=_index)
+                    time.sleep(1)
         else:
             
-
-            for _kwargs in self._targets :
-                self.post(_data,**_kwargs)
+            for _writer in self._targets :
+                self.post(_data,writer=_writer)
 
         return _data
         # return _data
@@ -148,6 +217,19 @@ class IETL(IReader) :
         This function returns an instance of a process that will perform the write operation
         :_args  parameters associated with writer object
         """
-        writer = transport.get.writer(**_args)
-        writer.write(_data)
-        writer.close()
+        #writer = transport.get.writer(**_args)
+        
+        try:
+            _action = 'post'
+            _shape = dict(zip(['rows','columns'],_data.shape))
+            _index = _args['index'] if 'index' in _args else 0
+            writer = _args['writer']
+            
+            writer.write(_data)
+            
+        except Exception as e:
+            _action = 'post-error'
+            print (e)
+            pass
+
+        self.log(action=_action,object=writer._agent.__module__, input= {'shape':_shape,'segment':_index})

transport/nosql/couchdb.py

@@ -19,6 +19,7 @@ class Couch:
 		@param	doc		user id involved
 		@param	dbname		database name (target)
 	"""
+	__template__={"url":None,"doc":None,"dbname":None,"username":None,"password":None}
 	def __init__(self,**args):
 		url 		= args['url'] if 'url' in args else 'http://localhost:5984'
 		self._id 	= args['doc']

transport/nosql/mongodb.py

@@ -25,6 +25,7 @@ class Mongo :
     """
     Basic mongodb functions are captured here
     """
+    __template__={"db":None,"collection":None,"host":None,"port":None,"username":None,"password":None}
     def __init__(self,**args):
         """
             :dbname     database name/identifier

transport/other/files.py

@@ -27,14 +27,14 @@ class Reader (File):
 	def __init__(self,**_args):
 		super().__init__(**_args)
 	def _stream(self,path) :
-		reader = pd.read_csv(path,delimiter=self.delimiter,chunksize=self._chunksize)
+		reader = pd.read_csv(path,sep=self.delimiter,chunksize=self._chunksize,low_memory=False)
 		for segment in reader :
 			yield segment
 	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(_path,delimiter=self.delimiter) if not self._chunksize else self._stream(_path)
+		return pd.read_csv(_path,sep=self.delimiter) if not self._chunksize else self._stream(_path)
 	def stream(self,**args):
 		raise Exception ("streaming needs to be implemented")
 class Writer (File):

transport/plugins/__init__.py

@@ -11,6 +11,8 @@ import importlib as IL
 import importlib.util
 import sys
 import os
+import pandas as pd
+
 
 class Plugin :
     """
@@ -54,26 +56,7 @@ class PluginLoader :
         self._modules = {}
         self._names = []
         self._registry = _args['registry']
-        # if path and os.path.exists(path) and _names:
-        #     for _name in self._names :
 
-        #         spec = importlib.util.spec_from_file_location('private', path)
-        #         module = importlib.util.module_from_spec(spec)
-        #         spec.loader.exec_module(module) #--loads it into sys.modules
-        #         if hasattr(module,_name) :
-        #             if self.isplugin(module,_name) :
-        #                 self._modules[_name] = getattr(module,_name)
-        #             else:
-        #                 print ([f'Found {_name}', 'not plugin'])
-        #         else:
-        #             #
-        #             # @TODO: We should log this somewhere some how
-        #             print (['skipping ',_name, hasattr(module,_name)])
-        #             pass
-        # else:
-        #     #
-        #     # Initialization is empty
-        #     self._names = []
         pass
     def load (self,**_args):
         self._modules = {}
@@ -84,7 +67,6 @@ class PluginLoader :
             spec = importlib.util.spec_from_file_location(_alias, path)
             module = importlib.util.module_from_spec(spec)
             spec.loader.exec_module(module) #--loads it into sys.modules
-            # self._names = [_name for _name in dir(module) if type(getattr(module,_name)).__name__ == 'function']
             for _name in dir(module) :
                 if self.isplugin(module,_name) :
                     self._module[_name] = getattr(module,_name)
@@ -97,11 +79,6 @@ class PluginLoader :
         This function will set a pointer to the list of modules to be called
         This should be used within the context of using the framework as a library
         """
-        # _name = _pointer.__name__ if type(_pointer).__name__ == 'function' else {}
-        
-        # self._modules[_name] = _pointer
-        # self._names.append(_name)
-        
         _pointer = self._registry.get(key=_key)
         if _pointer  :
             self._modules[_key] = _pointer
@@ -137,12 +114,28 @@ class PluginLoader :
 
         _n = len(self._names)
         return len(set(self._modules.keys()) & set (self._names)) / _n
-    def apply(self,_data):
+    def apply(self,_data,_logger=[]):
+        _input= {}
+        
         for _name in self._modules :
-            _pointer = self._modules[_name]
-            #
-            # @TODO: add exception handling
-            _data = _pointer(_data)
+            try:
+                _input = {'action':'plugin','object':_name,'input':{'status':'PASS'}}
+                _pointer = self._modules[_name]
+                if type(_data) == list :
+                    _data = pd.DataFrame(_data)
+                _brow,_bcol = list(_data.shape) 
+                
+                #
+                # @TODO: add exception handling
+                _data = _pointer(_data)
+                
+                _input['input']['shape'] = {'dropped':{'rows':_brow - _data.shape[0],'cols':_bcol-_data.shape[1]}}
+            except Exception as e:
+                _input['input']['status'] = 'FAILED'
+                print (e)
+            
+            if _logger:
+                _logger(_input)
         return _data
     # def apply(self,_data,_name):
     #     """

transport/registry.py

@@ -220,6 +220,8 @@ def init (email,path=REGISTRY_PATH,override=False,_file=REGISTRY_FILE):
 def lookup (label):
     global DATA
     return label in DATA
+has = lookup 
+
 def get (label='default') :
     global DATA
     return copy.copy(DATA[label]) if label in DATA else {}

transport/sql/common.py

@@ -7,7 +7,9 @@ from sqlalchemy import text
 
 import pandas as pd
 
+
 class Base:
+    __template__={"host":None,"port":1,"database":None,"table":None,"username":None,"password":None}
     def __init__(self,**_args):
         # print ([' ## ',_args])
         self._host = _args['host'] if 'host' in _args else 'localhost'
@@ -122,23 +124,21 @@ class BaseWriter (SQLBase):
     def __init__(self,**_args):
         super().__init__(**_args)
     def write(self,_data,**_args):
-        if type(_data) == dict :
-            _df = pd.DataFrame(_data)
-        elif type(_data) == list :
+        if type(_data) in [list,dict] :
             _df = pd.DataFrame(_data)
+        # elif type(_data) == list :
+        #     _df = pd.DataFrame(_data)
         else:
             _df = _data.copy()
         #
         # We are assuming we have a data-frame at this point
         #
         _table = _args['table'] if 'table' in _args else self._table
-        _mode = {'chunksize':2000000,'if_exists':'append','index':False}
+        _mode = {'if_exists':'append','index':False}
+        if self._chunksize :
+            _mode['chunksize'] = self._chunksize
         for key in ['if_exists','index','chunksize'] :
             if key in _args :
                 _mode[key] = _args[key]
-        # if 'schema' in _args :
-        #     _mode['schema'] = _args['schema']
-        # if 'if_exists' in _args :
-        #     _mode['if_exists'] = _args['if_exists']
         
         _df.to_sql(_table,self._engine,**_mode)

transport/sql/duckdb.py

@@ -2,8 +2,9 @@
 This module implements the handler for duckdb (in memory or not)
 """
 from transport.sql.common import Base, BaseReader, BaseWriter
-
+from multiprocessing import RLock
 class Duck :
+    lock = RLock()
     def __init__(self,**_args):
         #
         # duckdb with none as database will operate as an in-memory database
@@ -22,3 +23,4 @@ class Writer(Duck,BaseWriter):
     def __init__(self,**_args):
         Duck.__init__(self,**_args)
         BaseWriter.__init__(self,**_args)
+   

transport/sql/sqlite3.py

@@ -1,7 +1,9 @@
 import sqlalchemy
 import pandas as pd
 from transport.sql.common import Base, BaseReader, BaseWriter
-class SQLite3 (BaseReader):
+from multiprocessing import RLock
+class SQLite3 :
+    lock = RLock()
     def __init__(self,**_args):
         super().__init__(**_args)
         if 'path' in _args :
@@ -23,3 +25,9 @@ class Reader(SQLite3,BaseReader):
 class Writer (SQLite3,BaseWriter):
     def __init__(self,**_args):
         super().__init__(**_args)
+    def write(self,_data,**_kwargs):
+        try:
+            SQLite3.lock.acquire()
+            super().write(_data,**_kwargs)
+        finally:
+            SQLite3.lock.release()

transport/sql/sqlserver.py

@@ -7,6 +7,7 @@ from transport.sql.common import Base, BaseReader, BaseWriter
 
 
 class MsSQLServer:
+    
     def __init__(self,**_args) :
         super().__init__(**_args)
         pass

transport/warehouse/iceberg.py

@@ -51,7 +51,6 @@ class Iceberg :
         _schema = []
         try:
             _tableName = self._getPrefix(**_args) + f".{_args['table']}"
-            print (_tableName)
             _tmp = self._session.table(_tableName).schema
             _schema = _tmp.jsonValue()['fields']
             for _item in _schema :
@@ -77,6 +76,8 @@ class Iceberg :
             return False
     def apply(self,sql):
         pass
+    def close(self):
+        self._session.stop()
 class Reader(Iceberg) :
     def __init__(self,**_args):
         super().__init__(**_args)
@@ -103,13 +104,20 @@ class Writer (Iceberg):
         _prefix = self._getPrefix(**_args)
         if 'table' not in _args and not self._table :
             raise Exception (f"Table Name should be specified for catalog/database {_prefix}")
-        rdd = self._session.createDataFrame(_data)
+        
+        rdd = self._session.createDataFrame(_data,verifySchema=False)
         _mode = self._mode if 'mode' not in _args else _args['mode']
         _table = self._table if 'table' not in _args else _args['table']
+        # print (_data.shape,_mode,_table)
+
+        if not self._session.catalog.tableExists(_table):
+        #     # @TODO:
+        #     # add partitioning information here 
+            rdd.writeTo(_table).using('iceberg').create()
             
-        if not self.has(table=_table) :
-            _mode = 'overwrite'
-            rdd.write.format('iceberg').mode(_mode).saveAsTable(_table)
+        # #     _mode = 'overwrite'
+        # #     rdd.write.format('iceberg').mode(_mode).saveAsTable(_table)
         else:
-            _table = f'{_prefix}.{_table}'
-            rdd.write.format('iceberg').mode(_mode).save(_table)
+            # rdd.writeTo(_table).append()
+        # #     _table = f'{_prefix}.{_table}'
+            rdd.write.format('iceberg').mode('append').save(_table)