def create_test_output(parent_pg, location, name):
"""
Creates a test output (as an input port in the test process
group)
Args:
parent_pg (ProcessGroupEntity): Target process group to place
processor
location (Location): x,y coordinated to place the processor
name (string): Name of the test output
Returns:
(InputPortEntity)
"""
assert isinstance(parent_pg, nifi.ProcessGroupEntity)
assert isinstance(location, Location)
assert isinstance(name, str)
return nifi.ProcessGroupsApi().create_input_port(
id=parent_pg.component.id,
body=nifi.PortEntity(
revision=nifi.RevisionDTO(version=0),
component=nifi.PortDTO(
name=name,
position=nifi.PositionDTO(
x=location.x + 50,
y=location.y
)
)
)
)
def recreate_connection(connection):
"""
Creates the connection provided (assuming it's been deleted
from the canvas before)
Args:
connection (ConnectionEntity): Connection to re-create
Returns:
(ConnectionEntity)
"""
assert isinstance(connection, nifi.ConnectionEntity)
# Removing connection id; cannot specify it on re-creation
connection.component.id = None
# Re-create connection
return nifi.ProcessGroupsApi().create_connection(
id=connection.component.parent_group_id,
body=nifi.ConnectionEntity(
revision=nifi.RevisionDTO(version=0),
source_type=connection.source_type,
destination_type=connection.destination_type,
component=connection.component
)
)
def create_output_replacetext(parent_pg, location, name):
"""
Creates a ReplaceText to write attributes into the flowfile. When
we later merge the contents, we would otherwise lose the
attributes
Args:
parent_pg (ProcessGroupEntity): Target process group to place
processor
location (Location): x,y coordinated to place the processor
name (string): Name of the test input
Returns:
(ProcessorEntity)
"""
assert isinstance(parent_pg, nifi.ProcessGroupEntity)
assert isinstance(location, Location)
assert isinstance(name, str)
return nifi.ProcessGroupsApi().create_processor(
id=parent_pg.component.id,
body=nifi.ProcessorEntity(
revision=nifi.RevisionDTO(version=0),
component=nifi.ProcessorDTO(
type="org.apache.nifi.processors.standard.ReplaceText",
name="Merge flowfile and attributes",
position=nifi.PositionDTO(
x=location.x,
y=location.y
),
config=nifi.ProcessorConfigDTO(
properties={
# "Search Value": "^(.*)$",
"Replacement Value": "{\"flowfile\":\"$1\",\"attributes\":{" +
"\"test_start_time\":\"${test_start_time}\"," +
"\"test_end_time\":\"${test_end_time}\"," +
"\"test_duration\":\"${test_duration}\"," +
"\"test_input_name\":\"${http.headers.test_input_name}\"," +
"\"test_output_name\":\"${test_output_name}\"" +
"}}"
},
auto_terminated_relationships=["failure"]
)
)
)
)
def create_response_handler(parent_pg, location, http_context):
"""
Creates a HandleHttpResponse and connects it to the Http controller service
Args:
parent_pg (ProcessGroupEntity): Target process group to place
processor
location (Location): x,y coordinated to place the processor
http_context (ControllerServiceEntity): StandardHttpContextMap to
connect the processor to
Returns:
(ProcessorEntity)
"""
assert isinstance(parent_pg, nifi.ProcessGroupEntity)
assert isinstance(location, Location)
assert isinstance(http_context, nifi.ControllerServiceEntity)
return nifi.ProcessGroupsApi().create_processor(
id=parent_pg.component.id,
body=nifi.ProcessorEntity(
revision=nifi.RevisionDTO(version=0),
component=nifi.ProcessorDTO(
type="org.apache.nifi.processors.standard.HandleHttpResponse",
name="Return test result",
position=nifi.PositionDTO(
x=location.x,
y=location.y
),
config=nifi.ProcessorConfigDTO(
properties={
"HTTP Context Map": http_context.component.id,
"HTTP Status Code": "200",
"test_input_name": "${http.headers.test_input_name}",
"test_output_name": "${test_output_name}",
"test_start_time": "${test_start_time}",
"test_end_time": "${test_end_time}",
"test_duration": "${test_duration}"
},
auto_terminated_relationships=["failure", "success"]
)
)
)
)
def create_input_router(parent_pg, location, test_inputs):
"""
Creates a RouteOnAttribute, routing each different input
Only flow files with a matching http.headers.test_input_name attribute
will be routed to an (corresponding) input
Args:
parent_pg (ProcessGroupEntity): Target process group to place
processor
location (Location): x,y coordinated to place the processor
test_inputs (array of ProcessorEntity, InputPortEntity and OutputPortEntity):
array of outputs for the router, routed to the different inputs
Returns:
(ProcessorEntity)
"""
assert isinstance(parent_pg, nifi.ProcessGroupEntity)
assert isinstance(location, Location)
# assert isinstance(test_inputs, array)
route_properties = {}
for test_input in test_inputs:
route_properties[test_input.component.name] = "${http.headers.test_input_name:equals('" \
+ test_input.component.name + "')}"
return nifi.ProcessGroupsApi().create_processor(
id=parent_pg.component.id,
body=nifi.ProcessorEntity(
revision=nifi.RevisionDTO(version=0),
component=nifi.ProcessorDTO(
type="org.apache.nifi.processors.standard.RouteOnAttribute",
name="Route to correct input",
position=nifi.PositionDTO(
x=location.x,
y=location.y
),
config=nifi.ProcessorConfigDTO(
properties=route_properties,
auto_terminated_relationships=["unmatched"]
)
)
)
)
def create_request_handler(parent_pg, location, http_context, port):
"""
Creates a HandleHttpRequest and connects it to the Http controller service
Args:
parent_pg (ProcessGroupEntity): Target process group to place
processor
location (Location): x,y coordinated to place the processor
http_context (ControllerServiceEntity): StandardHttpContextMap to
connect the processor to
port (int): port number to use
Returns:
(ProcessorEntity)
"""
assert isinstance(parent_pg, nifi.ProcessGroupEntity)
assert isinstance(location, Location)
assert isinstance(http_context, nifi.ControllerServiceEntity)
assert isinstance(port, int)
return nifi.ProcessGroupsApi().create_processor(
id=parent_pg.component.id,
body=nifi.ProcessorEntity(
revision=nifi.RevisionDTO(version=0),
component=nifi.ProcessorDTO(
type="org.apache.nifi.processors.standard.HandleHttpRequest",
name="Receive test message",
position=nifi.PositionDTO(
x=location.x,
y=location.y
),
config=nifi.ProcessorConfigDTO(
properties={
"HTTP Context Map": http_context.component.id,
"Listening Port": port
}
)
)
)
)
def create_output_attribute(parent_pg, location, name):
"""
Creates a UpdateAttribute to register the test_output_name to the
response
Args:
parent_pg (ProcessGroupEntity): Target process group to place
processor
location (Location): x,y coordinated to place the processor
name (string): Name of the test output
Returns:
(ProcessorEntity)
"""
assert isinstance(parent_pg, nifi.ProcessGroupEntity)
assert isinstance(location, Location)
assert isinstance(name, str)
return nifi.ProcessGroupsApi().create_processor(
id=parent_pg.component.id,
body=nifi.ProcessorEntity(
revision=nifi.RevisionDTO(version=0),
component=nifi.ProcessorDTO(
type="org.apache.nifi.processors.attributes.UpdateAttribute",
name="Set output name '" + name + "'",
position=nifi.PositionDTO(
x=location.x,
y=location.y
),
config=nifi.ProcessorConfigDTO(
properties={
"test_output_name": name,
"test_end_time": "${now():toNumber()}",
"test_duration": "${now():toNumber():minus(${test_start_time})}"
}
)
)
)
)
def create_output_mergecontent(parent_pg, location, name):
"""
Creates a MergeContent to combine flowfiles from different outputs
Args:
parent_pg (ProcessGroupEntity): Target process group to place
processor
location (Location): x,y coordinated to place the processor
name (string): Name of the test input
Returns:
(ProcessorEntity)
"""
assert isinstance(parent_pg, nifi.ProcessGroupEntity)
assert isinstance(location, Location)
assert isinstance(name, str)
return nifi.ProcessGroupsApi().create_processor(
id=parent_pg.component.id,
body=nifi.ProcessorEntity(
revision=nifi.RevisionDTO(version=0),
component=nifi.ProcessorDTO(
type="org.apache.nifi.processors.standard.MergeContent",
name="Merge outputs",
position=nifi.PositionDTO(
x=location.x,
y=location.y
),
config=nifi.ProcessorConfigDTO(
properties={
"Header": "[",
"Footer": "]",
"Demarcator": ","
},
auto_terminated_relationships=["failure", "original"]
)
)
)
)
def create_output_router(parent_pg, location, name):
"""
Creates a RouteOnAttribute to filter all incoming messages from
the actual test results
Args:
parent_pg (ProcessGroupEntity): Target process group to place
processor
location (Location): x,y coordinated to place the processor
name (string): Name of the test input
Returns:
(ProcessorEntity)
"""
assert isinstance(parent_pg, nifi.ProcessGroupEntity)
assert isinstance(location, Location)
assert isinstance(name, str)
return nifi.ProcessGroupsApi().create_processor(
id=parent_pg.component.id,
body=nifi.ProcessorEntity(
revision=nifi.RevisionDTO(version=0),
component=nifi.ProcessorDTO(
type="org.apache.nifi.processors.standard.RouteOnAttribute",
name="Filter only test messages",
position=nifi.PositionDTO(
x=location.x,
y=location.y
),
config=nifi.ProcessorConfigDTO(
properties={"test": "${http.request.uri:equals('/" + name + "')}"},
auto_terminated_relationships=["unmatched"]
)
)
)
)
def create_http_context_map(parent_pg, name):
"""
Creates and enables a StandardHttpContextMap
Args:
parent_pg (ProcessGroupEntity): Target process group to place
controller
name (string): Name of the controller
Returns:
(ControllerServiceEntity)
"""
assert isinstance(parent_pg, nifi.ProcessGroupEntity)
assert isinstance(name, str)
http_context = nifi.ProcessGroupsApi().create_controller_service(
id=parent_pg.component.id,
body=nifi.ProcessorEntity(
revision=nifi.RevisionDTO(version=0),
component=nifi.ProcessorDTO(
type="org.apache.nifi.http.StandardHttpContextMap",
name=name
)
)
)
# canvas.create_controller not working properly...
return nifi.ControllerServicesApi().update_controller_service(
id=http_context.component.id,
body=nifi.ControllerServiceEntity(
revision=nifi.RevisionDTO(version=1),
component=nifi.ControllerServiceDTO(
state="ENABLED",
id=http_context.component.id
)
)
)
def __child_output_ports(self):
return nifi.ProcessGroupsApi().get_output_ports(self.current_id()).output_ports
def __child_processors(self):
return nifi.ProcessGroupsApi().get_processors(self.current_id()).processors
def cd_to_id(self, pg_id):
self.current = nifi.ProcessGroupsApi().get_process_group(pg_id)
def __init__(self):
self.logger = logging.getLogger('CanvasNavigator')
self.logger.setLevel(logging.DEBUG)
self.current = nifi.ProcessGroupsApi().get_process_group(canvas.get_root_pg_id())