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41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#pragma once
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#include <Processors/IProcessor.h>
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namespace DB
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{
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/** Has arbitary non zero number of inputs and arbitary non zero number of outputs.
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* All of them have the same structure.
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*
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* Pulls data from arbitary input (whenever it is ready) and pushes it to arbitary output (whenever is is not full).
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* Doesn't do any heavy calculations.
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* Doesn't preserve an order of data.
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*
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* Examples:
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* - union data from multiple inputs to single output - to serialize data that was processed in parallel.
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* - split data from single input to multiple outputs - to allow further parallel processing.
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*/
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class ResizeProcessor : public IProcessor
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{
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public:
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/// TODO Check that there is non zero number of inputs and outputs.
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ResizeProcessor(const Block & header, size_t num_inputs, size_t num_outputs)
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: IProcessor(InputPorts(num_inputs, header), OutputPorts(num_outputs, header))
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, current_input(inputs.begin())
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, current_output(outputs.begin())
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{
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}
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String getName() const override { return "Resize"; }
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Status prepare() override;
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private:
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InputPorts::iterator current_input;
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OutputPorts::iterator current_output;
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};
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}
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