compass.services.cpu.OCRPDFLoader#

class OCRPDFLoader(**kwargs)[source]#

Loader service for OCR

Parameters:: **kwargs – Keyword-value argument pairs to pass to concurrent.futures.ProcessPoolExecutor. By default, None.

Methods

`acquire_resources`()	Open thread pool and temp directory
`call`(args, *kwargs)	Call the service
`process`(fn, pdf_bytes, **kwargs)	Execute a PDF parsing function in the process pool
`process_using_futures`(fut, args, *kwargs)	Process a call to the service
`release_resources`()	Shutdown thread pool and cleanup temp directory

Attributes

`MAX_CONCURRENT_JOBS`	Max number of concurrent job submissions.
`can_process`	Always `True` (limiting is handled by asyncio)
`name`	Service name used to pull the correct queue object

async classmethod call(*args, **kwargs)#

Call the service

Parameters:

*args – Positional and keyword arguments to be passed to the underlying service processing function.
**kwargs – Positional and keyword arguments to be passed to the underlying service processing function.

Returns:

object – A response object from the underlying service.

property can_process#

Always True (limiting is handled by asyncio)

property name#

Service name used to pull the correct queue object

async process(fn, pdf_bytes, **kwargs)#

Execute a PDF parsing function in the process pool

Parameters:

fn (callable()) – Callable executed inside the process pool. Receives pdf_bytes as the first argument.
pdf_bytes (bytes) – Raw PDF payload forwarded to fn.
**kwargs – Additional keyword arguments passed to fn.

Returns:

Any – Result returned by fn after execution.

async process_using_futures(fut, *args, **kwargs)#

Process a call to the service

The result is communicated by updating fut.

Parameters:

fut (asyncio.Future) – A future object that should get the result of the processing operation. If the processing function returns answer, this method should call fut.set_result(answer).
**kwargs – Keyword arguments to be passed to the underlying processing function.