morpheus.stages.input.file_source_stage.FileSourceStage

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class FileSourceStage(c, filename, iterative=False, file_type= , repeat=1, filter_null=True)[source]

Bases: morpheus.pipeline.single_output_source.SingleOutputSource

Load messages from a file.

Source stage is used to load messages from a file and dumping the contents into the pipeline immediately. Useful for testing performance and accuracy of a pipeline.

Parameters

c<bsp-code-inline code="<a href="morpheus.config.Config.html#morpheus.config.Config">morpheus.config.Config</a>"><a href="morpheus.config.Config.html#morpheus.config.Config">morpheus.config.Config</a></bsp-code-inline>: Pipeline configuration instance.
filenamepathlib.Path, exists = True, dir_okay = False: Name of the file from which the messages will be read.
iterativeboolean, default = False, is_flag = True: Iterative mode will emit dataframes one at a time. Otherwise a list of dataframes is emitted. Iterative mode is good for interleaving source stages.
file_type<bsp-code-inline code="morpheus._lib.common.FileTypes">morpheus._lib.common.FileTypes</bsp-code-inline>, default = ‘auto’: Indicates what type of file to read. Specifying ‘auto’ will determine the file type from the extension. Supported extensions: ‘json’, ‘csv’
repeatint, default = 1, min = 1: Repeats the input dataset multiple times. Useful to extend small datasets for debugging.
filter_nullbool, default = True: Whether or not to filter rows with null ‘data’ column. Null values in the ‘data’ column can cause issues down the line with processing. Setting this to True is recommended.

Attributes

has_multi_input_ports: Indicates if this stage has multiple input ports.
has_multi_output_ports: Indicates if this stage has multiple output ports.
input_count: Return None for no max intput count
input_ports: Input ports to this stage.
is_built: Indicates if this stage has been built.
name: The name of the stage.
output_ports: Output ports from this stage.
unique_name: Unique name of stage.

Methods

`build`(builder[, do_propagate])	Build this stage.
`can_build`([check_ports])	Determines if all inputs have been built allowing this node to be built.
`get_all_input_stages`()	Get all input stages to this stage.
`get_all_inputs`()	Get all input senders to this stage.
`get_all_output_stages`()	Get all output stages from this stage.
`get_all_outputs`()	Get all output receivers from this stage.
`join`()	Awaitable method that stages can implement this to perform cleanup steps when pipeline is stopped.
`stop`()	Stages can implement this to perform cleanup steps when pipeline is stopped.
`supports_cpp_node`()	Specifies whether this Stage is capable of creating C++ nodes.

_build(builder, in_ports_streams)[source]

This function is responsible for constructing this stage’s internal mrc.SegmentObject object. The input of this function contains the returned value from the upstream stage.

The input values are the mrc.Builder for this stage and a StreamPair tuple which contain the input mrc.SegmentObject object and the message data type.

Parameters

builder<bsp-code-inline code="mrc.Builder">mrc.Builder</bsp-code-inline>: mrc.Builder object for the pipeline. This should be used to construct/attach the internal mrc.SegmentObject.
in_ports_streams<bsp-code-inline code="morpheus.pipeline.pipeline.StreamPair">morpheus.pipeline.pipeline.StreamPair</bsp-code-inline>: List of tuples containing the input mrc.SegmentObject object and the message data type.

Returns

typing.List[morpheus.pipeline.pipeline.StreamPair]: List of tuples containing the output mrc.SegmentObject object from this stage and the message data type.

_build_source(builder)[source]

Abstract method all derived Source classes should implement. Returns the same value as build.

Returns

morpheus.pipeline.pipeline.StreamPair:: A tuple containing the output mrc.SegmentObject object from this stage and the message data type.

build(builder, do_propagate=True)[source]

Build this stage.

Parameters

builder<bsp-code-inline code="mrc.Builder">mrc.Builder</bsp-code-inline>: MRC segment for this stage.
do_propagatebool, optional: Whether to propagate to build output stages, by default True.

can_build(check_ports=False)[source]

Determines if all inputs have been built allowing this node to be built.

Parameters

check_portsbool, optional: Check if we can build based on the input ports, by default False.

Returns

bool: True if we can build, False otherwise.

get_all_input_stages()[source]

Get all input stages to this stage.

Returns

typing.List[morpheus.pipeline.pipeline.StreamWrapper]: All input stages.

get_all_inputs()[source]

Get all input senders to this stage.

Returns

typing.List[morpheus.pipeline.pipeline.Sender]: All input senders.

get_all_output_stages()[source]

Get all output stages from this stage.

Returns

typing.List[morpheus.pipeline.pipeline.StreamWrapper]: All output stages.

get_all_outputs()[source]

Get all output receivers from this stage.

Returns

typing.List[morpheus.pipeline.pipeline.Receiver]: All output receivers.

property has_multi_input_ports: bool

Indicates if this stage has multiple input ports.

Returns

bool: True if stage has multiple input ports, False otherwise.

property has_multi_output_ports: bool

Indicates if this stage has multiple output ports.

Returns

bool: True if stage has multiple output ports, False otherwise.

property input_count: int: Return None for no max intput count

property input_ports: List[morpheus.pipeline.receiver.Receiver]

Input ports to this stage.

Returns

typing.List[morpheus.pipeline.pipeline.Receiver]: Input ports to this stage.

property is_built: bool

Indicates if this stage has been built.

Returns

bool: True if stage is built, False otherwise.

async join()[source]: Awaitable method that stages can implement this to perform cleanup steps when pipeline is stopped. Typically this is called after stop during a graceful shutdown, but may not be called if the pipeline is terminated on its own.

property name: str

The name of the stage. Used in logging. Each derived class should override this property with a unique name.

Returns

str: Name of a stage.

property output_ports: List[morpheus.pipeline.sender.Sender]

Output ports from this stage.

Returns

typing.List[morpheus.pipeline.pipeline.Sender]: Output ports from this stage.

stop()[source]: Stages can implement this to perform cleanup steps when pipeline is stopped.

supports_cpp_node()[source]: Specifies whether this Stage is capable of creating C++ nodes. During the build phase, this value will be combined with CppConfig.get_should_use_cpp() to determine whether or not a C++ node is created. This is an instance method to allow runtime decisions and derived classes to override base implementations.

property unique_name: str

Unique name of stage. Generated by appending stage id to stage name.

Returns

str: Unique name of stage.