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5c8f2ee786
On Windows two tests fail that use MockTable: flush_job_test and compaction_job_test with the following message: compaction_job_test_je.exe : Assertion failed: result.size() == 4, file c:\dev\rocksdb\rocksdb\table\mock_table.cc, line 110 Investigation reveals that this failure occurs when a 4 byte ID written to a beginning of the physically open file (main contents remains in a in-memory map) can not be read back. The reason for the failure is that the ID is written directly to a WritableFile bypassing WritableFileWriter. The side effect of that is that pending_sync_ never becomes true so the file is never flushed, however, the direct cause of the failure is that the filesize_ member of the WritableFileWriter remains zero. At Close() the file is truncated to that size and the file becomes empty so the ID can not be read back.
143 lines
4.3 KiB
C++
143 lines
4.3 KiB
C++
// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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// Copyright (c) 2013, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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#include "table/mock_table.h"
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#include "db/dbformat.h"
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#include "port/port.h"
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#include "rocksdb/table_properties.h"
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#include "table/get_context.h"
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#include "util/coding.h"
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#include "util/file_reader_writer.h"
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namespace rocksdb {
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namespace mock {
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namespace {
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const InternalKeyComparator icmp_(BytewiseComparator());
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} // namespace
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stl_wrappers::KVMap MakeMockFile(
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std::initializer_list<std::pair<const std::string, std::string>> l) {
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return stl_wrappers::KVMap(l, stl_wrappers::LessOfComparator(&icmp_));
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}
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InternalIterator* MockTableReader::NewIterator(const ReadOptions&,
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Arena* arena) {
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return new MockTableIterator(table_);
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}
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Status MockTableReader::Get(const ReadOptions&, const Slice& key,
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GetContext* get_context) {
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std::unique_ptr<MockTableIterator> iter(new MockTableIterator(table_));
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for (iter->Seek(key); iter->Valid(); iter->Next()) {
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ParsedInternalKey parsed_key;
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if (!ParseInternalKey(iter->key(), &parsed_key)) {
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return Status::Corruption(Slice());
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}
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if (!get_context->SaveValue(parsed_key, iter->value())) {
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break;
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}
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}
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return Status::OK();
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}
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std::shared_ptr<const TableProperties> MockTableReader::GetTableProperties()
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const {
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return std::shared_ptr<const TableProperties>(new TableProperties());
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}
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MockTableFactory::MockTableFactory() : next_id_(1) {}
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Status MockTableFactory::NewTableReader(
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const TableReaderOptions& table_reader_options,
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unique_ptr<RandomAccessFileReader>&& file, uint64_t file_size,
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unique_ptr<TableReader>* table_reader) const {
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uint32_t id = GetIDFromFile(file.get());
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MutexLock lock_guard(&file_system_.mutex);
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auto it = file_system_.files.find(id);
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if (it == file_system_.files.end()) {
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return Status::IOError("Mock file not found");
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}
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table_reader->reset(new MockTableReader(it->second));
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return Status::OK();
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}
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TableBuilder* MockTableFactory::NewTableBuilder(
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const TableBuilderOptions& table_builder_options, uint32_t column_family_id,
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WritableFileWriter* file) const {
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uint32_t id = GetAndWriteNextID(file);
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return new MockTableBuilder(id, &file_system_);
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}
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Status MockTableFactory::CreateMockTable(Env* env, const std::string& fname,
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stl_wrappers::KVMap file_contents) {
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std::unique_ptr<WritableFile> file;
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auto s = env->NewWritableFile(fname, &file, EnvOptions());
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if (!s.ok()) {
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return s;
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}
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WritableFileWriter file_writer(std::move(file), EnvOptions());
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uint32_t id = GetAndWriteNextID(&file_writer);
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file_system_.files.insert({id, std::move(file_contents)});
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return Status::OK();
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}
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uint32_t MockTableFactory::GetAndWriteNextID(WritableFileWriter* file) const {
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uint32_t next_id = next_id_.fetch_add(1);
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char buf[4];
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EncodeFixed32(buf, next_id);
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file->Append(Slice(buf, 4));
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return next_id;
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}
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uint32_t MockTableFactory::GetIDFromFile(RandomAccessFileReader* file) const {
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char buf[4];
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Slice result;
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file->Read(0, 4, &result, buf);
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assert(result.size() == 4);
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return DecodeFixed32(buf);
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}
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void MockTableFactory::AssertSingleFile(
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const stl_wrappers::KVMap& file_contents) {
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ASSERT_EQ(file_system_.files.size(), 1U);
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ASSERT_TRUE(file_contents == file_system_.files.begin()->second);
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}
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void MockTableFactory::AssertLatestFile(
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const stl_wrappers::KVMap& file_contents) {
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ASSERT_GE(file_system_.files.size(), 1U);
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auto latest = file_system_.files.end();
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--latest;
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if (file_contents != latest->second) {
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std::cout << "Wrong content! Content of latest file:" << std::endl;
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for (const auto& kv : latest->second) {
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ParsedInternalKey ikey;
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std::string key, value;
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std::tie(key, value) = kv;
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ParseInternalKey(Slice(key), &ikey);
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std::cout << ikey.DebugString(false) << " -> " << value << std::endl;
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}
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ASSERT_TRUE(false);
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}
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}
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} // namespace mock
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} // namespace rocksdb
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