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rocksdb/db/table_properties_collector_...

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// 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 <map>
#include <memory>
#include <string>
#include "db/db_impl.h"
#include "db/dbformat.h"
#include "db/table_properties_collector.h"
#include "rocksdb/table.h"
#include "table/block_based_table_factory.h"
#include "table/meta_blocks.h"
#include "table/plain_table_factory.h"
#include "table/table_builder.h"
#include "util/coding.h"
#include "util/testharness.h"
#include "util/testutil.h"
namespace rocksdb {
class TablePropertiesTest {
};
// TODO(kailiu) the following classes should be moved to some more general
// places, so that other tests can also make use of them.
// `FakeWritableFile` and `FakeRandomeAccessFile` bypass the real file system
// and therefore enable us to quickly setup the tests.
class FakeWritableFile : public WritableFile {
public:
~FakeWritableFile() { }
const std::string& contents() const { return contents_; }
virtual Status Close() { return Status::OK(); }
virtual Status Flush() { return Status::OK(); }
virtual Status Sync() { return Status::OK(); }
virtual Status Append(const Slice& data) {
contents_.append(data.data(), data.size());
return Status::OK();
}
private:
std::string contents_;
};
class FakeRandomeAccessFile : public RandomAccessFile {
public:
explicit FakeRandomeAccessFile(const Slice& contents)
: contents_(contents.data(), contents.size()) {
}
virtual ~FakeRandomeAccessFile() { }
uint64_t Size() const { return contents_.size(); }
virtual Status Read(uint64_t offset, size_t n, Slice* result,
char* scratch) const {
if (offset > contents_.size()) {
return Status::InvalidArgument("invalid Read offset");
}
if (offset + n > contents_.size()) {
n = contents_.size() - offset;
}
memcpy(scratch, &contents_[offset], n);
*result = Slice(scratch, n);
return Status::OK();
}
private:
std::string contents_;
};
class DumbLogger : public Logger {
public:
virtual void Logv(const char* format, va_list ap) { }
virtual size_t GetLogFileSize() const { return 0; }
};
// Utilities test functions
void MakeBuilder(const Options& options,
const InternalKeyComparator& internal_comparator,
std::unique_ptr<FakeWritableFile>* writable,
std::unique_ptr<TableBuilder>* builder) {
writable->reset(new FakeWritableFile);
builder->reset(options.table_factory->NewTableBuilder(
options, internal_comparator, writable->get(), options.compression));
}
// Collects keys that starts with "A" in a table.
class RegularKeysStartWithA: public TablePropertiesCollector {
public:
const char* Name() const { return "RegularKeysStartWithA"; }
Status Finish(UserCollectedProperties* properties) {
std::string encoded;
PutVarint32(&encoded, count_);
*properties = UserCollectedProperties {
{ "TablePropertiesTest", "Rocksdb" },
{ "Count", encoded }
};
return Status::OK();
}
Status Add(const Slice& user_key, const Slice& value) {
// simply asssume all user keys are not empty.
if (user_key.data()[0] == 'A') {
++count_;
}
return Status::OK();
}
virtual UserCollectedProperties GetReadableProperties() const {
return UserCollectedProperties{};
}
private:
uint32_t count_ = 0;
};
extern uint64_t kBlockBasedTableMagicNumber;
extern uint64_t kPlainTableMagicNumber;
void TestCustomizedTablePropertiesCollector(
uint64_t magic_number, bool encode_as_internal, const Options& options,
const InternalKeyComparator& internal_comparator) {
// make sure the entries will be inserted with order.
std::map<std::string, std::string> kvs = {
{"About ", "val5"}, // starts with 'A'
{"Abstract", "val2"}, // starts with 'A'
{"Around ", "val7"}, // starts with 'A'
{"Beyond ", "val3"},
{"Builder ", "val1"},
{"Cancel ", "val4"},
{"Find ", "val6"},
};
// -- Step 1: build table
std::unique_ptr<TableBuilder> builder;
std::unique_ptr<FakeWritableFile> writable;
MakeBuilder(options, internal_comparator, &writable, &builder);
for (const auto& kv : kvs) {
if (encode_as_internal) {
InternalKey ikey(kv.first, 0, ValueType::kTypeValue);
builder->Add(ikey.Encode(), kv.second);
} else {
builder->Add(kv.first, kv.second);
}
}
ASSERT_OK(builder->Finish());
// -- Step 2: Read properties
FakeRandomeAccessFile readable(writable->contents());
TableProperties* props;
Status s = ReadTableProperties(
&readable,
writable->contents().size(),
magic_number,
Env::Default(),
nullptr,
&props
);
std::unique_ptr<TableProperties> props_guard(props);
ASSERT_OK(s);
auto user_collected = props->user_collected_properties;
ASSERT_EQ("Rocksdb", user_collected.at("TablePropertiesTest"));
uint32_t starts_with_A = 0;
Slice key(user_collected.at("Count"));
ASSERT_TRUE(GetVarint32(&key, &starts_with_A));
ASSERT_EQ(3u, starts_with_A);
}
TEST(TablePropertiesTest, CustomizedTablePropertiesCollector) {
// Test properties collectors with internal keys or regular keys
// for block based table
for (bool encode_as_internal : { true, false }) {
Options options;
auto collector = new RegularKeysStartWithA();
if (encode_as_internal) {
options.table_properties_collectors = {
std::make_shared<UserKeyTablePropertiesCollector>(collector)
};
} else {
options.table_properties_collectors.resize(1);
options.table_properties_collectors[0].reset(collector);
}
test::PlainInternalKeyComparator ikc(options.comparator);
TestCustomizedTablePropertiesCollector(kBlockBasedTableMagicNumber,
encode_as_internal, options, ikc);
}
// test plain table
Options options;
options.table_properties_collectors.push_back(
std::make_shared<RegularKeysStartWithA>()
);
options.table_factory = std::make_shared<PlainTableFactory>(8, 8, 0);
test::PlainInternalKeyComparator ikc(options.comparator);
TestCustomizedTablePropertiesCollector(kPlainTableMagicNumber, true, options,
ikc);
}
void TestInternalKeyPropertiesCollector(
uint64_t magic_number,
bool sanitized,
std::shared_ptr<TableFactory> table_factory) {
InternalKey keys[] = {
InternalKey("A ", 0, ValueType::kTypeValue),
InternalKey("B ", 0, ValueType::kTypeValue),
InternalKey("C ", 0, ValueType::kTypeValue),
InternalKey("W ", 0, ValueType::kTypeDeletion),
InternalKey("X ", 0, ValueType::kTypeDeletion),
InternalKey("Y ", 0, ValueType::kTypeDeletion),
InternalKey("Z ", 0, ValueType::kTypeDeletion),
};
std::unique_ptr<TableBuilder> builder;
std::unique_ptr<FakeWritableFile> writable;
Options options;
test::PlainInternalKeyComparator pikc(options.comparator);
options.table_factory = table_factory;
if (sanitized) {
options.table_properties_collectors = {
std::make_shared<RegularKeysStartWithA>()
};
// with sanitization, even regular properties collector will be able to
// handle internal keys.
auto comparator = options.comparator;
// HACK: Set options.info_log to avoid writing log in
// SanitizeOptions().
options.info_log = std::make_shared<DumbLogger>();
options = SanitizeOptions("db", // just a place holder
&pikc, nullptr, // don't care filter policy
options);
options.comparator = comparator;
} else {
options.table_properties_collectors = {
std::make_shared<InternalKeyPropertiesCollector>()
};
}
MakeBuilder(options, pikc, &writable, &builder);
for (const auto& k : keys) {
builder->Add(k.Encode(), "val");
}
ASSERT_OK(builder->Finish());
FakeRandomeAccessFile readable(writable->contents());
TableProperties* props;
Status s = ReadTableProperties(
&readable,
writable->contents().size(),
magic_number,
Env::Default(),
nullptr,
&props
);
ASSERT_OK(s);
std::unique_ptr<TableProperties> props_guard(props);
auto user_collected = props->user_collected_properties;
uint64_t deleted = GetDeletedKeys(user_collected);
ASSERT_EQ(4u, deleted);
if (sanitized) {
uint32_t starts_with_A = 0;
Slice key(user_collected.at("Count"));
ASSERT_TRUE(GetVarint32(&key, &starts_with_A));
ASSERT_EQ(1u, starts_with_A);
}
}
TEST(TablePropertiesTest, InternalKeyPropertiesCollector) {
TestInternalKeyPropertiesCollector(
kBlockBasedTableMagicNumber,
true /* sanitize */,
std::make_shared<BlockBasedTableFactory>()
);
TestInternalKeyPropertiesCollector(
kBlockBasedTableMagicNumber,
true /* not sanitize */,
std::make_shared<BlockBasedTableFactory>()
);
TestInternalKeyPropertiesCollector(
kPlainTableMagicNumber,
false /* not sanitize */,
std::make_shared<PlainTableFactory>(8, 8, 0)
);
}
} // namespace rocksdb
int main(int argc, char** argv) {
return rocksdb::test::RunAllTests();
}