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rocksdb/table/mock_table.cc

141 lines
4.2 KiB

// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#include "table/mock_table.h"
#include "db/dbformat.h"
#include "port/port.h"
#include "rocksdb/table_properties.h"
#include "table/get_context.h"
#include "util/coding.h"
#include "util/file_reader_writer.h"
namespace rocksdb {
namespace mock {
namespace {
const InternalKeyComparator icmp_(BytewiseComparator());
} // namespace
stl_wrappers::KVMap MakeMockFile(
std::initializer_list<std::pair<const std::string, std::string>> l) {
return stl_wrappers::KVMap(l, stl_wrappers::LessOfComparator(&icmp_));
}
InternalIterator* MockTableReader::NewIterator(const ReadOptions&,
Arena* arena) {
return new MockTableIterator(table_);
}
Status MockTableReader::Get(const ReadOptions&, const Slice& key,
GetContext* get_context) {
std::unique_ptr<MockTableIterator> iter(new MockTableIterator(table_));
for (iter->Seek(key); iter->Valid(); iter->Next()) {
ParsedInternalKey parsed_key;
if (!ParseInternalKey(iter->key(), &parsed_key)) {
return Status::Corruption(Slice());
}
if (!get_context->SaveValue(parsed_key, iter->value())) {
break;
}
}
return Status::OK();
}
std::shared_ptr<const TableProperties> MockTableReader::GetTableProperties()
const {
return std::shared_ptr<const TableProperties>(new TableProperties());
}
MockTableFactory::MockTableFactory() : next_id_(1) {}
Status MockTableFactory::NewTableReader(
const TableReaderOptions& table_reader_options,
unique_ptr<RandomAccessFileReader>&& file, uint64_t file_size,
unique_ptr<TableReader>* table_reader) const {
uint32_t id = GetIDFromFile(file.get());
MutexLock lock_guard(&file_system_.mutex);
auto it = file_system_.files.find(id);
if (it == file_system_.files.end()) {
return Status::IOError("Mock file not found");
}
table_reader->reset(new MockTableReader(it->second));
return Status::OK();
}
TableBuilder* MockTableFactory::NewTableBuilder(
const TableBuilderOptions& table_builder_options, uint32_t column_family_id,
WritableFileWriter* file) const {
uint32_t id = GetAndWriteNextID(file->writable_file());
return new MockTableBuilder(id, &file_system_);
}
Status MockTableFactory::CreateMockTable(Env* env, const std::string& fname,
stl_wrappers::KVMap file_contents) {
std::unique_ptr<WritableFile> file;
auto s = env->NewWritableFile(fname, &file, EnvOptions());
if (!s.ok()) {
return s;
}
uint32_t id = GetAndWriteNextID(file.get());
file_system_.files.insert({id, std::move(file_contents)});
return Status::OK();
}
uint32_t MockTableFactory::GetAndWriteNextID(WritableFile* file) const {
uint32_t next_id = next_id_.fetch_add(1);
char buf[4];
EncodeFixed32(buf, next_id);
file->Append(Slice(buf, 4));
return next_id;
}
uint32_t MockTableFactory::GetIDFromFile(RandomAccessFileReader* file) const {
char buf[4];
Slice result;
file->Read(0, 4, &result, buf);
assert(result.size() == 4);
return DecodeFixed32(buf);
}
void MockTableFactory::AssertSingleFile(
const stl_wrappers::KVMap& file_contents) {
ASSERT_EQ(file_system_.files.size(), 1U);
ASSERT_TRUE(file_contents == file_system_.files.begin()->second);
}
void MockTableFactory::AssertLatestFile(
const stl_wrappers::KVMap& file_contents) {
ASSERT_GE(file_system_.files.size(), 1U);
auto latest = file_system_.files.end();
--latest;
if (file_contents != latest->second) {
std::cout << "Wrong content! Content of latest file:" << std::endl;
for (const auto& kv : latest->second) {
ParsedInternalKey ikey;
std::string key, value;
std::tie(key, value) = kv;
ParseInternalKey(Slice(key), &ikey);
std::cout << ikey.DebugString(false) << " -> " << value << std::endl;
}
ASSERT_TRUE(false);
}
}
} // namespace mock
} // namespace rocksdb