SplitterV2

For conceptual usage, see:

Implementation

This Python API is provided by a Rogue C++ class exported into Python.

Native C++ class: - SplitterV2

Generated API

class rogue.protocols.batcher.SplitterV2

C++: rogue::protocols::batcher::SplitterV2

Binding source: [SplitterV2.cpp]

Splits one batcher v2 super-frame into per-record output frames.

Protocol reference: https://confluence.slac.stanford.edu/x/L2VlK SplitterV2 uses CoreV2 to parse a batcher super-frame, then emits one Rogue stream frame per parsed Data record:

Payload bytes copied from record data.
Channel set from record destination.
First/last user fields propagated from record metadata. Threading model:
No internal worker thread is created.
Processing executes synchronously in the caller thread of acceptFrame().

__init__()

C++: rogue::protocols::batcher::SplitterV2

Constructs a SplitterV2 instance.

This constructor is a low-level C++ allocation path. Prefer create() when shared ownership or Python exposure is required.

_addSlave(slave)

C++: rogue::interfaces::stream::Master::addSlave()

Attaches a downstream slave.

Multiple slaves are supported. The first attached slave is used for frame allocation and receives frames last during send. Exposed as _addSlave() in Python.

Parameters:: slave – Stream slave pointer.

_slaveCount()

C++: rogue::interfaces::stream::Master::slaveCount()

Returns the number of attached slaves.

Exposed as _slaveCount() in Python.

Returns:: Number of attached slaves.

_reqFrame(size, zeroCopyEn)

C++: rogue::interfaces::stream::Master::reqFrame()

Requests allocation of a new frame from the primary slave.

Creates an empty frame with at least the requested payload capacity. The Master will forward this request to the primary Slave object. The request for a new Frame includes a flag which indicates if a zeroCopy frame is allowed. In most cases this flag can be set to true. Non-zero-copy frames are requested if the Master may need to transmit the same frame multiple times. Exposed as _reqFrame() in Python.

Parameters:

size – Minimum requested payload size in bytes.
zeroCopyEn – Set to true when zero-copy frame allocation is allowed.

Returns:

Newly allocated frame pointer.

_sendFrame(frame)

C++: rogue::interfaces::stream::Master::sendFrame()

Sends a frame to all attached slaves.

This method sends the passed Frame to all of the attached Slave objects by calling their acceptFrame() method. First the secondary Slaves are called in order of attachment, followed last by the primary Slave. If the Frame is a zero copy frame it will most likely be empty when the sendFrame() method returns Exposed as _sendFrame() in Python.

Parameters:: frame – Frame to send.

_stop()

C++: rogue::interfaces::stream::Master::stop()

Stops frame generation and shuts down associated threads.

Exposed as stop() in Python. This is the primary subclass hook on Master. Override when the subclass owns background activity or transport resources that require deterministic shutdown.

__rshift__(other)

C++: rogue::interfaces::stream::Master::rshiftPy()

Supports >> operator usage from Python.

Parameters:: p – Python object expected to resolve to a stream Slave.
Returns:: Original Python object for chaining semantics.

setDebug(debug, name)

C++: rogue::interfaces::stream::Slave::setDebug()

Sets debug message verbosity and logger name.

This method enables debug messages when using the base Slave class attached as a primary or secondary Slave on a Master. Typically used when attaching a base Slave object for debug purposes. Exposed as setDebug() in Python.

Parameters:

debug – Maximum number of bytes to print in debug message.
name – Name included in debug messages.

_acceptFrame(frame)

C++: rogue::interfaces::stream::Slave::acceptFrame()

Accepts a frame from an upstream master.

Invokes the Python override when provided.

Parameters:: frame – Frame received from the stream path.

getFrameCount()

C++: rogue::interfaces::stream::Slave::getFrameCount()

Returns frame counter.

Returns the total frames received. Only valid if acceptFrame is not re-implemented as a sub-class. Typically used when attaching a base Slave object for debug purposes. Exposed as getFrameCount() in Python.

Returns:: Total number of Frame objects received.

getByteCount()

C++: rogue::interfaces::stream::Slave::getByteCount()

Returns byte counter.

Returns the total bytes received. Only valid if acceptFrame is not re-implemented as a sub-class. Typically used when attaching a base Slave object for debug purposes. Exposed as getByteCount() in Python.

Returns:: Total number of bytes received.

_stop()

C++: rogue::interfaces::stream::Slave::stop()

Shuts down threads associated with this object.

Called during shutdown to stop activity and allow clean process exit. Subclasses should override when they own worker threads or timers. Exposed as stop() in Python.

getAllocCount()

C++: rogue::interfaces::stream::Pool::getAllocCount()

Returns total currently allocated buffer count.

This value is incremented as buffers are allocated and decremented as buffers are freed. Exposed as getAllocCount() in Python.