class SparkMagicBase(Magics):
def __init__(self, shell, data=None, spark_events=None):
# You must call the parent constructor
super(SparkMagicBase, self).__init__(shell)
self.logger = SparkLog(u"SparkMagics")
self.ipython_display = IpythonDisplay()
self.spark_controller = SparkController(self.ipython_display)
self.logger.debug("Initialized spark magics.")
if spark_events is None:
spark_events = SparkEvents()
spark_events.emit_library_loaded_event()
def execute_final(self, cell, output_var, samplemethod, maxrows,
samplefraction, session_name, coerce):
(success,
out) = self.spark_controller.run_command(Command(cell), session_name)
if not success:
self.ipython_display.send_error(out)
else:
self.ipython_display.write(out)
if output_var is not None:
spark_store_command = self._spark_store_command(
output_var, samplemethod, maxrows, samplefraction, coerce)
df = self.spark_controller.run_command(spark_store_command,
session_name)
self.shell.user_ns[output_var] = df
def execute_spark(self, cell, output_var, samplemethod, maxrows,
samplefraction, session_name, coerce):
if "lagom as" in cell:
self.ipython_display.send_error(
"You are not allowed to do the following: 'import maggy.experiment.lagom as ...'. Please, just use 'import maggy.experiment as experiment' (or something else)"
)
raise
elif ".lagom" in cell:
client = Client(self.spark_controller, self.session_name, 5,
self.ipython_display)
try:
client.start_heartbeat()
if DEBUG:
self.ipython_display.writeln("Started heartbeating...")
self.execute_final(cell, output_var, samplemethod, maxrows,
samplefraction, session_name, coerce)
except:
raise
finally:
# 4. Kill thread before leaving current scope
client.stop()
try:
client.close()
except:
if DEBUG:
print("Socket already closed by maggy server.")
pass
else:
self.execute_final(cell, output_var, samplemethod, maxrows,
samplefraction, session_name, coerce)
@staticmethod
def _spark_store_command(output_var, samplemethod, maxrows, samplefraction,
coerce):
return SparkStoreCommand(output_var,
samplemethod,
maxrows,
samplefraction,
coerce=coerce)
def execute_sqlquery(self, cell, samplemethod, maxrows, samplefraction,
session, output_var, quiet, coerce):
sqlquery = self._sqlquery(cell, samplemethod, maxrows, samplefraction,
coerce)
df = self.spark_controller.run_sqlquery(sqlquery, session)
if output_var is not None:
self.shell.user_ns[output_var] = df
if quiet:
return None
else:
return df
@staticmethod
def _sqlquery(cell, samplemethod, maxrows, samplefraction, coerce):
return SQLQuery(cell,
samplemethod,
maxrows,
samplefraction,
coerce=coerce)
def _print_endpoint_info(self, info_sessions, current_session_id):
if info_sessions:
info_sessions = sorted(info_sessions, key=lambda s: s.id)
html = get_sessions_info_html(info_sessions, current_session_id)
self.ipython_display.html(html)
else:
self.ipython_display.html(u'No active sessions.')
class SparkMagicBase(Magics):
_STRING_VAR_TYPE = 'str'
_PANDAS_DATAFRAME_VAR_TYPE = 'df'
_ALLOWED_LOCAL_TO_SPARK_TYPES = [
_STRING_VAR_TYPE, _PANDAS_DATAFRAME_VAR_TYPE
]
def __init__(self, shell, data=None, spark_events=None):
# You must call the parent constructor
super(SparkMagicBase, self).__init__(shell)
self.logger = SparkLog(u"SparkMagics")
self.ipython_display = IpythonDisplay()
self.spark_controller = SparkController(self.ipython_display)
self.logger.debug(u'Initialized spark magics.')
if spark_events is None:
spark_events = SparkEvents()
spark_events.emit_library_loaded_event()
def do_send_to_spark(self, cell, input_variable_name, var_type,
output_variable_name, max_rows, session_name):
try:
input_variable_value = self.shell.user_ns[input_variable_name]
except KeyError:
raise BadUserDataException(
u'Variable named {} not found.'.format(input_variable_name))
if input_variable_value is None:
raise BadUserDataException(
u'Value of {} is None!'.format(input_variable_name))
if not output_variable_name:
output_variable_name = input_variable_name
if not max_rows:
max_rows = conf.default_maxrows()
input_variable_type = var_type.lower()
if input_variable_type == self._STRING_VAR_TYPE:
command = SendStringToSparkCommand(input_variable_name,
input_variable_value,
output_variable_name)
elif input_variable_type == self._PANDAS_DATAFRAME_VAR_TYPE:
command = SendPandasDfToSparkCommand(input_variable_name,
input_variable_value,
output_variable_name,
max_rows)
else:
raise BadUserDataException(
u'Invalid or incorrect -t type. Available are: [{}]'.format(
u','.join(self._ALLOWED_LOCAL_TO_SPARK_TYPES)))
(success, result,
mime_type) = self.spark_controller.run_command(command, None)
if not success:
self.ipython_display.send_error(result)
else:
self.ipython_display.write(
u'Successfully passed \'{}\' as \'{}\' to Spark'
u' kernel'.format(input_variable_name, output_variable_name))
def execute_final(self, cell, output_var, samplemethod, maxrows,
samplefraction, session_name, coerce):
(success, out,
mimetype) = self.spark_controller.run_command(Command(cell),
session_name)
if not success:
if conf.shutdown_session_on_spark_statement_errors():
self.spark_controller.cleanup()
raise SparkStatementException(out)
else:
if isinstance(out, string_types):
if mimetype == MIMETYPE_TEXT_HTML:
self.ipython_display.html(out)
else:
self.ipython_display.write(out)
else:
self.ipython_display.display(out)
if output_var is not None:
spark_store_command = self._spark_store_command(
output_var, samplemethod, maxrows, samplefraction, coerce)
df = self.spark_controller.run_command(spark_store_command,
session_name)
self.shell.user_ns[output_var] = df
def execute_spark(self, cell, output_var, samplemethod, maxrows,
samplefraction, session_name, coerce):
if "lagom as" in cell:
self.ipython_display.send_error(
"You are not allowed to do the following: 'import maggy.experiment.lagom as ...'. Please, just use 'import maggy.experiment as experiment' (or something else)"
)
raise
elif ".lagom" in cell:
client = Client(self.spark_controller, self.session_name, 5,
self.ipython_display)
try:
client.start_heartbeat()
if DEBUG:
self.ipython_display.writeln("Started heartbeating...")
self.execute_final(cell, output_var, samplemethod, maxrows,
samplefraction, session_name, coerce)
except:
raise
finally:
# 4. Kill thread before leaving current scope
client.stop()
try:
client.close()
except:
if DEBUG:
print("Socket already closed by maggy server.")
pass
else:
self.execute_final(cell, output_var, samplemethod, maxrows,
samplefraction, session_name, coerce)
@staticmethod
def _spark_store_command(output_var, samplemethod, maxrows, samplefraction,
coerce):
return SparkStoreCommand(output_var,
samplemethod,
maxrows,
samplefraction,
coerce=coerce)
def execute_sqlquery(self, cell, samplemethod, maxrows, samplefraction,
session, output_var, quiet, coerce):
sqlquery = self._sqlquery(cell, samplemethod, maxrows, samplefraction,
coerce)
df = self.spark_controller.run_sqlquery(sqlquery, session)
if output_var is not None:
self.shell.user_ns[output_var] = df
if quiet:
return None
else:
return df
@staticmethod
def _sqlquery(cell, samplemethod, maxrows, samplefraction, coerce):
return SQLQuery(cell,
samplemethod,
maxrows,
samplefraction,
coerce=coerce)
def _print_endpoint_info(self, info_sessions, current_session_id):
if info_sessions:
info_sessions = sorted(info_sessions, key=lambda s: s.id)
html = get_sessions_info_html(info_sessions, current_session_id)
self.ipython_display.html(html)
else:
self.ipython_display.html(u'No active sessions.')
