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PARQUET-1422: [C++] Use common Arrow IO interfaces throughout codebase
This is a long overdue unification of platform code that wasn't possible until after the monorepo merge that occurred last year. This should also permit us to take a more consistent approach with regards to asynchronous IO. A backwards compatibility layer is provided for the now deprecated `parquet::RandomAccessSource` and `parquet::OutputStream` classes. Some incidental changes were required to get things to work: * ARROW-5428: Adding a "read extent" option to BufferedInputStream to limit the extent of bytes read from the underlying raw stream * `arrow::io::InputStream::Peek` needed to have its API changed to return Status, because of the next point * `arrow::io::BufferedOutputStream::Peek` will expand the buffer if a Peek is requested that is larger than the buffer. The idea is that it should be possible to "look ahead" in the stream without altering the stream position. This is needed as part of finding the next data header (which can be large or small depending on statistics size, etc.) in a Parquet stream * Added a `[]` operator to `Buffer` to facilitate testing * Some continued "flattening" of the "parquet/util" directory to be simpler Some outstanding questions: * The Parquet reader and writer classes assumed exclusive ownership of the file handles, and they are closed when the Parquet file is closed. Arrow files are shared, and so calling `Close` is not appropriate. I've attempted to preserve this logic by having Close called in the destructors of the wrapper classes in `parquet/deprecated_io.h` An issue I ran into * Changes in apache@d82ac40 introduced a unit test with meaningful trailing whitespace, which my editor strips away. I've commented out the offending test and will have to open a JIRA about fixing Author: Wes McKinney <wesm+git@apache.org> Closes apache#4404 from wesm/parquet-use-arrow-io and squashes the following commits: f010a8e <Wes McKinney> Add missing PARQUET_EXPORT macros 50f7b92 <Wes McKinney> Add missing PARQUET_EXPORT 3b27ac2 <Wes McKinney> Follow changes in c_glib, fix Doxygen warning 7c1ae55 <Wes McKinney> ReadableFile::Peek now returns NotImplemented cc7789e <Wes McKinney> Fix unit tests b6e1739 <Wes McKinney> Allow unbounded peeks in BufferedInputStream cd2a3cd <Wes McKinney> Add unit tests for legacy Parquet input/output wrappers e03f07d <Wes McKinney> remove outdated comment 4c40bf2 <Wes McKinney> Adapt Python bindings 769974a <Wes McKinney> Tests passing again 1886de8 <Wes McKinney> column_writer more similar to before 7efc1ac <Wes McKinney> Fix one bug 30f1f4d <Wes McKinney> Get things compiling again, but tests are broken 4efb4e7 <Wes McKinney> Implement expanding-peek logic, change signature of InputStream::Peak to be able to return Status db1877e <Wes McKinney> More progress toward compilation, port over parquet::BufferedInputStream unit tests b05a712 <Wes McKinney> More refactoring 66be1af <Wes McKinney> Port more code, add basic wrapper implementation for legacy IO interfaces 59143dd <Wes McKinney> Start a bit of refactoring/consolidation in prep for using Arrow IO interfaces
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Lines changed: 1555 additions & 1574 deletions

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‎c_glib/arrow-glib/input-stream.cpp‎

Lines changed: 12 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -24,6 +24,7 @@
2424
#include <arrow/io/interfaces.h>
2525
#include <arrow/io/memory.h>
2626
#include <arrow/ipc/reader.h>
27+
#include <arrow/util/string_view.h>
2728

2829
#include <arrow-glib/buffer.hpp>
2930
#include <arrow-glib/codec.hpp>
@@ -397,12 +398,20 @@ garrow_seekable_input_stream_read_at(GArrowSeekableInputStream *input_stream,
397398
*/
398399
GBytes *
399400
garrow_seekable_input_stream_peek(GArrowSeekableInputStream *input_stream,
400-
gint64 n_bytes)
401+
gint64 n_bytes,
402+
GError **error)
401403
{
402404
auto arrow_random_access_file =
403405
garrow_seekable_input_stream_get_raw(input_stream);
404-
auto string_view = arrow_random_access_file->Peek(n_bytes);
405-
return g_bytes_new_static(string_view.data(), string_view.size());
406+
407+
arrow::util::string_view view;
408+
auto status = arrow_random_access_file->Peek(n_bytes, &view);
409+
410+
if (garrow_error_check(error, status, "[seekable-input-stream][peek]")) {
411+
return g_bytes_new_static(view.data(), view.size());
412+
} else {
413+
return NULL;
414+
}
406415
}
407416

408417

‎c_glib/arrow-glib/input-stream.h‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -68,7 +68,8 @@ GArrowBuffer *garrow_seekable_input_stream_read_at(GArrowSeekableInputStream *in
6868
GError **error);
6969
GARROW_AVAILABLE_IN_0_12
7070
GBytes *garrow_seekable_input_stream_peek(GArrowSeekableInputStream *input_stream,
71-
gint64 n_bytes);
71+
gint64 n_bytes,
72+
GError **error);
7273

7374

7475
#define GARROW_TYPE_BUFFER_INPUT_STREAM \

‎cpp/src/arrow/buffer-builder.h‎

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Original file line numberDiff line numberDiff line change
@@ -148,6 +148,12 @@ class ARROW_EXPORT BufferBuilder {
148148
capacity_ = size_ = 0;
149149
}
150150

151+
/// \brief Set size to a smaller value without modifying builder
152+
/// contents. For reusable BufferBuilder classes
153+
/// \param[in] position must be non-negative and less than or equal
154+
/// to the current length()
155+
void Rewind(int64_t position) { size_ = position; }
156+
151157
int64_t capacity() const { return capacity_; }
152158
int64_t length() const { return size_; }
153159
const uint8_t* data() const { return data_; }

‎cpp/src/arrow/buffer.h‎

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Original file line numberDiff line numberDiff line change
@@ -86,6 +86,8 @@ class ARROW_EXPORT Buffer {
8686
parent_ = parent;
8787
}
8888

89+
uint8_t operator[](std::size_t i) const { return data_[i]; }
90+
8991
bool is_mutable() const { return is_mutable_; }
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/// \brief Construct a new std::string with a hexadecimal representation of the buffer.

‎cpp/src/arrow/io/buffered-test.cc‎

Lines changed: 207 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -37,6 +37,7 @@
3737
#include "arrow/io/buffered.h"
3838
#include "arrow/io/file.h"
3939
#include "arrow/io/interfaces.h"
40+
#include "arrow/io/memory.h"
4041
#include "arrow/io/test-common.h"
4142
#include "arrow/status.h"
4243
#include "arrow/testing/gtest_util.h"
@@ -342,8 +343,6 @@ TEST_F(TestBufferedInputStream, BasicOperation) {
342343

343344
// Nothing in the buffer
344345
ASSERT_EQ(0, buffered_->bytes_buffered());
345-
util::string_view peek = buffered_->Peek(10);
346-
ASSERT_EQ(0, peek.size());
347346

348347
std::vector<char> buf(test_data_.size());
349348
int64_t bytes_read;
@@ -354,6 +353,10 @@ TEST_F(TestBufferedInputStream, BasicOperation) {
354353
// 6 bytes remaining in buffer
355354
ASSERT_EQ(6, buffered_->bytes_buffered());
356355

356+
util::string_view peek;
357+
ASSERT_OK(buffered_->Peek(6, &peek));
358+
ASSERT_EQ(6, peek.size());
359+
357360
// Buffered position is 4
358361
ASSERT_OK(buffered_->Tell(&stream_position));
359362
ASSERT_EQ(4, stream_position);
@@ -362,11 +365,6 @@ TEST_F(TestBufferedInputStream, BasicOperation) {
362365
ASSERT_OK(raw_->Tell(&stream_position));
363366
ASSERT_EQ(10, stream_position);
364367

365-
// Peek does not look beyond end of buffer
366-
peek = buffered_->Peek(10);
367-
ASSERT_EQ(6, peek.size());
368-
ASSERT_EQ(0, memcmp(peek.data(), test_data_.data() + 4, 6));
369-
370368
// Reading to end of buffered bytes does not cause any more data to be
371369
// buffered
372370
ASSERT_OK(buffered_->Read(6, &bytes_read, buf.data()));
@@ -388,7 +386,7 @@ TEST_F(TestBufferedInputStream, BasicOperation) {
388386
ASSERT_EQ(test_data_.size(), stream_position);
389387

390388
// Peek at EOF
391-
peek = buffered_->Peek(10);
389+
ASSERT_OK(buffered_->Peek(10, &peek));
392390
ASSERT_EQ(0, peek.size());
393391

394392
// Calling Close closes raw_
@@ -453,5 +451,206 @@ TEST_F(TestBufferedInputStream, SetBufferSize) {
453451
ASSERT_OK(buffered_->SetBufferSize(5));
454452
}
455453

454+
class TestBufferedInputStreamBound : public ::testing::Test {
455+
public:
456+
void SetUp() { CreateExample(/*bounded=*/true); }
457+
458+
void CreateExample(bool bounded = true) {
459+
// Create a buffer larger than source size, to check that the
460+
// stream end is respected
461+
std::shared_ptr<ResizableBuffer> buf;
462+
ASSERT_OK(AllocateResizableBuffer(default_memory_pool(), source_size_ + 10, &buf));
463+
ASSERT_LT(source_size_, buf->size());
464+
for (int i = 0; i < source_size_; i++) {
465+
buf->mutable_data()[i] = static_cast<uint8_t>(i);
466+
}
467+
source_ = std::make_shared<BufferReader>(buf);
468+
ASSERT_OK(source_->Advance(stream_offset_));
469+
ASSERT_OK(BufferedInputStream::Create(chunk_size_, default_memory_pool(), source_,
470+
&stream_, bounded ? stream_size_ : -1));
471+
}
472+
473+
protected:
474+
int64_t source_size_ = 256;
475+
int64_t stream_offset_ = 10;
476+
int64_t stream_size_ = source_size_ - stream_offset_;
477+
int64_t chunk_size_ = 50;
478+
std::shared_ptr<InputStream> source_;
479+
std::shared_ptr<BufferedInputStream> stream_;
480+
};
481+
482+
TEST_F(TestBufferedInputStreamBound, Basics) {
483+
std::shared_ptr<Buffer> buffer;
484+
util::string_view view;
485+
486+
// source is at offset 10
487+
ASSERT_OK(stream_->Peek(10, &view));
488+
ASSERT_EQ(10, view.size());
489+
for (int i = 0; i < 10; i++) {
490+
ASSERT_EQ(10 + i, view[i]) << i;
491+
}
492+
493+
ASSERT_OK(stream_->Read(10, &buffer));
494+
ASSERT_EQ(10, buffer->size());
495+
for (int i = 0; i < 10; i++) {
496+
ASSERT_EQ(10 + i, (*buffer)[i]) << i;
497+
}
498+
499+
ASSERT_OK(stream_->Read(10, &buffer));
500+
ASSERT_EQ(10, buffer->size());
501+
for (int i = 0; i < 10; i++) {
502+
ASSERT_EQ(20 + i, (*buffer)[i]) << i;
503+
}
504+
ASSERT_OK(stream_->Advance(5));
505+
ASSERT_OK(stream_->Advance(5));
506+
507+
// source is at offset 40
508+
// read across buffer boundary. buffer size is 50
509+
ASSERT_OK(stream_->Read(20, &buffer));
510+
ASSERT_EQ(20, buffer->size());
511+
for (int i = 0; i < 20; i++) {
512+
ASSERT_EQ(40 + i, (*buffer)[i]) << i;
513+
}
514+
515+
// read more than original chunk size
516+
ASSERT_OK(stream_->Read(60, &buffer));
517+
ASSERT_EQ(60, buffer->size());
518+
for (int i = 0; i < 60; i++) {
519+
ASSERT_EQ(60 + i, (*buffer)[i]) << i;
520+
}
521+
522+
ASSERT_OK(stream_->Advance(120));
523+
524+
// source is at offset 240
525+
// read outside of source boundary. source size is 256
526+
ASSERT_OK(stream_->Read(30, &buffer));
527+
528+
ASSERT_EQ(16, buffer->size());
529+
for (int i = 0; i < 16; i++) {
530+
ASSERT_EQ(240 + i, (*buffer)[i]) << i;
531+
}
532+
// Stream exhausted
533+
ASSERT_OK(stream_->Read(1, &buffer));
534+
ASSERT_EQ(0, buffer->size());
535+
}
536+
537+
TEST_F(TestBufferedInputStreamBound, LargeFirstPeek) {
538+
// Test a first peek larger than chunk size
539+
std::shared_ptr<Buffer> buffer;
540+
util::string_view view;
541+
int64_t n = 70;
542+
ASSERT_GT(n, chunk_size_);
543+
544+
// source is at offset 10
545+
ASSERT_OK(stream_->Peek(n, &view));
546+
ASSERT_EQ(n, static_cast<int>(view.size()));
547+
for (int i = 0; i < n; i++) {
548+
ASSERT_EQ(10 + i, view[i]) << i;
549+
}
550+
551+
ASSERT_OK(stream_->Peek(n, &view));
552+
ASSERT_EQ(n, static_cast<int>(view.size()));
553+
for (int i = 0; i < n; i++) {
554+
ASSERT_EQ(10 + i, view[i]) << i;
555+
}
556+
557+
ASSERT_OK(stream_->Read(n, &buffer));
558+
ASSERT_EQ(n, buffer->size());
559+
for (int i = 0; i < n; i++) {
560+
ASSERT_EQ(10 + i, (*buffer)[i]) << i;
561+
}
562+
// source is at offset 10 + n
563+
ASSERT_OK(stream_->Read(20, &buffer));
564+
ASSERT_EQ(20, buffer->size());
565+
for (int i = 0; i < 20; i++) {
566+
ASSERT_EQ(10 + n + i, (*buffer)[i]) << i;
567+
}
568+
}
569+
570+
TEST_F(TestBufferedInputStreamBound, UnboundedPeek) {
571+
CreateExample(/*bounded=*/false);
572+
573+
util::string_view view;
574+
ASSERT_OK(stream_->Peek(10, &view));
575+
ASSERT_EQ(10, view.size());
576+
ASSERT_EQ(50, stream_->bytes_buffered());
577+
578+
std::shared_ptr<Buffer> buf;
579+
ASSERT_OK(stream_->Read(10, &buf));
580+
581+
// Peek into buffered bytes
582+
ASSERT_OK(stream_->Peek(40, &view));
583+
ASSERT_EQ(40, view.size());
584+
ASSERT_EQ(40, stream_->bytes_buffered());
585+
ASSERT_EQ(50, stream_->buffer_size());
586+
587+
// Peek past buffered bytes
588+
ASSERT_OK(stream_->Peek(41, &view));
589+
ASSERT_EQ(41, view.size());
590+
ASSERT_EQ(41, stream_->bytes_buffered());
591+
ASSERT_EQ(51, stream_->buffer_size());
592+
593+
// Peek to the end of the buffer
594+
ASSERT_OK(stream_->Peek(246, &view));
595+
ASSERT_EQ(246, view.size());
596+
ASSERT_EQ(246, stream_->bytes_buffered());
597+
ASSERT_EQ(246, stream_->buffer_size());
598+
599+
// Larger peek returns the same, expands the buffer, but there is no
600+
// more data to buffer
601+
ASSERT_OK(stream_->Peek(300, &view));
602+
ASSERT_EQ(246, view.size());
603+
ASSERT_EQ(246, stream_->bytes_buffered());
604+
ASSERT_EQ(300, stream_->buffer_size());
605+
}
606+
607+
TEST_F(TestBufferedInputStreamBound, OneByteReads) {
608+
std::shared_ptr<Buffer> buffer;
609+
for (int i = 0; i < stream_size_; ++i) {
610+
ASSERT_OK(stream_->Read(1, &buffer));
611+
ASSERT_EQ(1, buffer->size());
612+
ASSERT_EQ(10 + i, (*buffer)[0]) << i;
613+
}
614+
// Stream exhausted
615+
ASSERT_OK(stream_->Read(1, &buffer));
616+
ASSERT_EQ(0, buffer->size());
617+
}
618+
619+
TEST_F(TestBufferedInputStreamBound, BufferExactlyExhausted) {
620+
// Test exhausting the buffer exactly then issuing further reads (PARQUET-1571).
621+
std::shared_ptr<Buffer> buffer;
622+
623+
// source is at offset 10
624+
int64_t n = 10;
625+
ASSERT_OK(stream_->Read(n, &buffer));
626+
ASSERT_EQ(n, buffer->size());
627+
for (int i = 0; i < n; i++) {
628+
ASSERT_EQ(10 + i, (*buffer)[i]) << i;
629+
}
630+
// source is at offset 20
631+
// Exhaust buffer exactly
632+
n = stream_->bytes_buffered();
633+
ASSERT_OK(stream_->Read(n, &buffer));
634+
ASSERT_EQ(n, buffer->size());
635+
for (int i = 0; i < n; i++) {
636+
ASSERT_EQ(20 + i, (*buffer)[i]) << i;
637+
}
638+
639+
// source is at offset 20 + n
640+
// Read new buffer
641+
ASSERT_OK(stream_->Read(10, &buffer));
642+
ASSERT_EQ(10, buffer->size());
643+
for (int i = 0; i < 10; i++) {
644+
ASSERT_EQ(20 + n + i, (*buffer)[i]) << i;
645+
}
646+
647+
// source is at offset 30 + n
648+
ASSERT_OK(stream_->Read(10, &buffer));
649+
ASSERT_EQ(10, buffer->size());
650+
for (int i = 0; i < 10; i++) {
651+
ASSERT_EQ(30 + n + i, (*buffer)[i]) << i;
652+
}
653+
}
654+
456655
} // namespace io
457656
} // namespace arrow

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