dasmig::core::jsonl_writer Class Reference

Writes one JSON document per line (JSON Lines / NDJSON). More...

#include <sinks.hpp>

Public Member Functions
	jsonl_writer (std::ostream &out)
	Write to out, which must outlive the writer.
void	write_line (std::string_view json)
	Write one document as a line.
template<json_result T>
void	operator() (std::uint64_t, const T &item)
	Sink call: write the item's to_json().
std::size_t	lines () const noexcept
	Lines written so far.

Detailed Description

Writes one JSON document per line (JSON Lines / NDJSON).

Use it as the sink of for_each_batch(); results need to_json().

dasmig::core::jsonl_writer out{std::cout};
gen.for_each_name(request, {.count = 1000}, 7, out);

Definition at line 300 of file sinks.hpp.

Constructor & Destructor Documentation

jsonl_writer()

dasmig::core::jsonl_writer::jsonl_writer ( std::ostream &  out )

inlineexplicit

Write to out, which must outlive the writer.

Parameters

out	Destination stream.

Definition at line 305 of file sinks.hpp.

Member Function Documentation

lines()

std::size_t dasmig::core::jsonl_writer::lines ( ) const

inlinenoexcept

Lines written so far.

Returns

The count.

Definition at line 331 of file sinks.hpp.

operator()()

template<json_result T>

void dasmig::core::jsonl_writer::operator() ( std::uint64_t  , const T &  item  )

inline

Sink call: write the item's to_json().

Parameters

item	The result.

Definition at line 324 of file sinks.hpp.

write_line()

void dasmig::core::jsonl_writer::write_line ( std::string_view  json )

inline

Write one document as a line.

Parameters

json	Compact JSON; it must not contain a line break.

Exceptions

std::invalid_argument

If json contains a line break.

Definition at line 310 of file sinks.hpp.

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The documentation for this class was generated from the following file:

• dasmig/core/sinks.hpp