rocksdb/util/auto_roll_logger_test.cc
Siying Dong 3c327ac2d0 Change RocksDB License
Summary: Closes https://github.com/facebook/rocksdb/pull/2589

Differential Revision: D5431502

Pulled By: siying

fbshipit-source-id: 8ebf8c87883daa9daa54b2303d11ce01ab1f6f75
2017-07-15 16:11:23 -07:00

491 lines
17 KiB
C++

// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
#ifndef ROCKSDB_LITE
#include "util/auto_roll_logger.h"
#include <errno.h>
#include <sys/stat.h>
#include <algorithm>
#include <cmath>
#include <fstream>
#include <iostream>
#include <iterator>
#include <string>
#include <thread>
#include <vector>
#include "port/port.h"
#include "rocksdb/db.h"
#include "util/logging.h"
#include "util/sync_point.h"
#include "util/testharness.h"
namespace rocksdb {
namespace {
class NoSleepEnv : public EnvWrapper {
public:
NoSleepEnv(Env* base) : EnvWrapper(base) {}
virtual void SleepForMicroseconds(int micros) override {
fake_time_ += static_cast<uint64_t>(micros);
}
virtual uint64_t NowNanos() override { return fake_time_ * 1000; }
virtual uint64_t NowMicros() override { return fake_time_; }
private:
uint64_t fake_time_ = 6666666666;
};
} // namespace
class AutoRollLoggerTest : public testing::Test {
public:
static void InitTestDb() {
#ifdef OS_WIN
// Replace all slashes in the path so windows CompSpec does not
// become confused
std::string testDir(kTestDir);
std::replace_if(testDir.begin(), testDir.end(),
[](char ch) { return ch == '/'; }, '\\');
std::string deleteCmd = "if exist " + testDir + " rd /s /q " + testDir;
#else
std::string deleteCmd = "rm -rf " + kTestDir;
#endif
ASSERT_TRUE(system(deleteCmd.c_str()) == 0);
Env::Default()->CreateDir(kTestDir);
}
void RollLogFileBySizeTest(AutoRollLogger* logger, size_t log_max_size,
const std::string& log_message);
void RollLogFileByTimeTest(Env*, AutoRollLogger* logger, size_t time,
const std::string& log_message);
static const std::string kSampleMessage;
static const std::string kTestDir;
static const std::string kLogFile;
static Env* default_env;
};
const std::string AutoRollLoggerTest::kSampleMessage(
"this is the message to be written to the log file!!");
const std::string AutoRollLoggerTest::kTestDir(test::TmpDir() + "/db_log_test");
const std::string AutoRollLoggerTest::kLogFile(test::TmpDir() +
"/db_log_test/LOG");
Env* AutoRollLoggerTest::default_env = Env::Default();
// In this test we only want to Log some simple log message with
// no format. LogMessage() provides such a simple interface and
// avoids the [format-security] warning which occurs when you
// call ROCKS_LOG_INFO(logger, log_message) directly.
namespace {
void LogMessage(Logger* logger, const char* message) {
ROCKS_LOG_INFO(logger, "%s", message);
}
void LogMessage(const InfoLogLevel log_level, Logger* logger,
const char* message) {
Log(log_level, logger, "%s", message);
}
} // namespace
void AutoRollLoggerTest::RollLogFileBySizeTest(AutoRollLogger* logger,
size_t log_max_size,
const std::string& log_message) {
logger->SetInfoLogLevel(InfoLogLevel::INFO_LEVEL);
// measure the size of each message, which is supposed
// to be equal or greater than log_message.size()
LogMessage(logger, log_message.c_str());
size_t message_size = logger->GetLogFileSize();
size_t current_log_size = message_size;
// Test the cases when the log file will not be rolled.
while (current_log_size + message_size < log_max_size) {
LogMessage(logger, log_message.c_str());
current_log_size += message_size;
ASSERT_EQ(current_log_size, logger->GetLogFileSize());
}
// Now the log file will be rolled
LogMessage(logger, log_message.c_str());
// Since rotation is checked before actual logging, we need to
// trigger the rotation by logging another message.
LogMessage(logger, log_message.c_str());
ASSERT_TRUE(message_size == logger->GetLogFileSize());
}
void AutoRollLoggerTest::RollLogFileByTimeTest(Env* env, AutoRollLogger* logger,
size_t time,
const std::string& log_message) {
uint64_t expected_ctime;
uint64_t actual_ctime;
uint64_t total_log_size;
EXPECT_OK(env->GetFileSize(kLogFile, &total_log_size));
expected_ctime = logger->TEST_ctime();
logger->SetCallNowMicrosEveryNRecords(0);
// -- Write to the log for several times, which is supposed
// to be finished before time.
for (int i = 0; i < 10; ++i) {
env->SleepForMicroseconds(50000);
LogMessage(logger, log_message.c_str());
EXPECT_OK(logger->GetStatus());
// Make sure we always write to the same log file (by
// checking the create time);
actual_ctime = logger->TEST_ctime();
// Also make sure the log size is increasing.
EXPECT_EQ(expected_ctime, actual_ctime);
EXPECT_GT(logger->GetLogFileSize(), total_log_size);
total_log_size = logger->GetLogFileSize();
}
// -- Make the log file expire
env->SleepForMicroseconds(static_cast<int>(time * 1000000));
LogMessage(logger, log_message.c_str());
// At this time, the new log file should be created.
actual_ctime = logger->TEST_ctime();
EXPECT_LT(expected_ctime, actual_ctime);
EXPECT_LT(logger->GetLogFileSize(), total_log_size);
}
TEST_F(AutoRollLoggerTest, RollLogFileBySize) {
InitTestDb();
size_t log_max_size = 1024 * 5;
AutoRollLogger logger(Env::Default(), kTestDir, "", log_max_size, 0);
RollLogFileBySizeTest(&logger, log_max_size,
kSampleMessage + ":RollLogFileBySize");
}
TEST_F(AutoRollLoggerTest, RollLogFileByTime) {
NoSleepEnv nse(Env::Default());
size_t time = 2;
size_t log_size = 1024 * 5;
InitTestDb();
// -- Test the existence of file during the server restart.
ASSERT_EQ(Status::NotFound(), default_env->FileExists(kLogFile));
AutoRollLogger logger(&nse, kTestDir, "", log_size, time);
ASSERT_OK(default_env->FileExists(kLogFile));
RollLogFileByTimeTest(&nse, &logger, time,
kSampleMessage + ":RollLogFileByTime");
}
TEST_F(AutoRollLoggerTest, OpenLogFilesMultipleTimesWithOptionLog_max_size) {
// If only 'log_max_size' options is specified, then every time
// when rocksdb is restarted, a new empty log file will be created.
InitTestDb();
// WORKAROUND:
// avoid complier's complaint of "comparison between signed
// and unsigned integer expressions" because literal 0 is
// treated as "singed".
size_t kZero = 0;
size_t log_size = 1024;
AutoRollLogger* logger = new AutoRollLogger(
Env::Default(), kTestDir, "", log_size, 0);
LogMessage(logger, kSampleMessage.c_str());
ASSERT_GT(logger->GetLogFileSize(), kZero);
delete logger;
// reopens the log file and an empty log file will be created.
logger = new AutoRollLogger(
Env::Default(), kTestDir, "", log_size, 0);
ASSERT_EQ(logger->GetLogFileSize(), kZero);
delete logger;
}
TEST_F(AutoRollLoggerTest, CompositeRollByTimeAndSizeLogger) {
size_t time = 2, log_max_size = 1024 * 5;
InitTestDb();
NoSleepEnv nse(Env::Default());
AutoRollLogger logger(&nse, kTestDir, "", log_max_size, time);
// Test the ability to roll by size
RollLogFileBySizeTest(&logger, log_max_size,
kSampleMessage + ":CompositeRollByTimeAndSizeLogger");
// Test the ability to roll by Time
RollLogFileByTimeTest(&nse, &logger, time,
kSampleMessage + ":CompositeRollByTimeAndSizeLogger");
}
#ifndef OS_WIN
// TODO: does not build for Windows because of PosixLogger use below. Need to
// port
TEST_F(AutoRollLoggerTest, CreateLoggerFromOptions) {
DBOptions options;
NoSleepEnv nse(Env::Default());
shared_ptr<Logger> logger;
// Normal logger
ASSERT_OK(CreateLoggerFromOptions(kTestDir, options, &logger));
ASSERT_TRUE(dynamic_cast<PosixLogger*>(logger.get()));
// Only roll by size
InitTestDb();
options.max_log_file_size = 1024;
ASSERT_OK(CreateLoggerFromOptions(kTestDir, options, &logger));
AutoRollLogger* auto_roll_logger =
dynamic_cast<AutoRollLogger*>(logger.get());
ASSERT_TRUE(auto_roll_logger);
RollLogFileBySizeTest(
auto_roll_logger, options.max_log_file_size,
kSampleMessage + ":CreateLoggerFromOptions - size");
// Only roll by Time
options.env = &nse;
InitTestDb();
options.max_log_file_size = 0;
options.log_file_time_to_roll = 2;
ASSERT_OK(CreateLoggerFromOptions(kTestDir, options, &logger));
auto_roll_logger =
dynamic_cast<AutoRollLogger*>(logger.get());
RollLogFileByTimeTest(&nse, auto_roll_logger, options.log_file_time_to_roll,
kSampleMessage + ":CreateLoggerFromOptions - time");
// roll by both Time and size
InitTestDb();
options.max_log_file_size = 1024 * 5;
options.log_file_time_to_roll = 2;
ASSERT_OK(CreateLoggerFromOptions(kTestDir, options, &logger));
auto_roll_logger =
dynamic_cast<AutoRollLogger*>(logger.get());
RollLogFileBySizeTest(auto_roll_logger, options.max_log_file_size,
kSampleMessage + ":CreateLoggerFromOptions - both");
RollLogFileByTimeTest(&nse, auto_roll_logger, options.log_file_time_to_roll,
kSampleMessage + ":CreateLoggerFromOptions - both");
}
TEST_F(AutoRollLoggerTest, LogFlushWhileRolling) {
DBOptions options;
shared_ptr<Logger> logger;
InitTestDb();
options.max_log_file_size = 1024 * 5;
ASSERT_OK(CreateLoggerFromOptions(kTestDir, options, &logger));
AutoRollLogger* auto_roll_logger =
dynamic_cast<AutoRollLogger*>(logger.get());
ASSERT_TRUE(auto_roll_logger);
rocksdb::port::Thread flush_thread;
// Notes:
// (1) Need to pin the old logger before beginning the roll, as rolling grabs
// the mutex, which would prevent us from accessing the old logger. This
// also marks flush_thread with AutoRollLogger::Flush:PinnedLogger.
// (2) Need to reset logger during PosixLogger::Flush() to exercise a race
// condition case, which is executing the flush with the pinned (old)
// logger after auto-roll logger has cut over to a new logger.
// (3) PosixLogger::Flush() happens in both threads but its SyncPoints only
// are enabled in flush_thread (the one pinning the old logger).
rocksdb::SyncPoint::GetInstance()->LoadDependencyAndMarkers(
{{"AutoRollLogger::Flush:PinnedLogger",
"AutoRollLoggerTest::LogFlushWhileRolling:PreRollAndPostThreadInit"},
{"PosixLogger::Flush:Begin1",
"AutoRollLogger::ResetLogger:BeforeNewLogger"},
{"AutoRollLogger::ResetLogger:AfterNewLogger",
"PosixLogger::Flush:Begin2"}},
{{"AutoRollLogger::Flush:PinnedLogger", "PosixLogger::Flush:Begin1"},
{"AutoRollLogger::Flush:PinnedLogger", "PosixLogger::Flush:Begin2"}});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
flush_thread = port::Thread ([&]() { auto_roll_logger->Flush(); });
TEST_SYNC_POINT(
"AutoRollLoggerTest::LogFlushWhileRolling:PreRollAndPostThreadInit");
RollLogFileBySizeTest(auto_roll_logger, options.max_log_file_size,
kSampleMessage + ":LogFlushWhileRolling");
flush_thread.join();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
#endif // OS_WIN
TEST_F(AutoRollLoggerTest, InfoLogLevel) {
InitTestDb();
size_t log_size = 8192;
size_t log_lines = 0;
// an extra-scope to force the AutoRollLogger to flush the log file when it
// becomes out of scope.
{
AutoRollLogger logger(Env::Default(), kTestDir, "", log_size, 0);
for (int log_level = InfoLogLevel::HEADER_LEVEL;
log_level >= InfoLogLevel::DEBUG_LEVEL; log_level--) {
logger.SetInfoLogLevel((InfoLogLevel)log_level);
for (int log_type = InfoLogLevel::DEBUG_LEVEL;
log_type <= InfoLogLevel::HEADER_LEVEL; log_type++) {
// log messages with log level smaller than log_level will not be
// logged.
LogMessage((InfoLogLevel)log_type, &logger, kSampleMessage.c_str());
}
log_lines += InfoLogLevel::HEADER_LEVEL - log_level + 1;
}
for (int log_level = InfoLogLevel::HEADER_LEVEL;
log_level >= InfoLogLevel::DEBUG_LEVEL; log_level--) {
logger.SetInfoLogLevel((InfoLogLevel)log_level);
// again, messages with level smaller than log_level will not be logged.
ROCKS_LOG_HEADER(&logger, "%s", kSampleMessage.c_str());
ROCKS_LOG_DEBUG(&logger, "%s", kSampleMessage.c_str());
ROCKS_LOG_INFO(&logger, "%s", kSampleMessage.c_str());
ROCKS_LOG_WARN(&logger, "%s", kSampleMessage.c_str());
ROCKS_LOG_ERROR(&logger, "%s", kSampleMessage.c_str());
ROCKS_LOG_FATAL(&logger, "%s", kSampleMessage.c_str());
log_lines += InfoLogLevel::HEADER_LEVEL - log_level + 1;
}
}
std::ifstream inFile(AutoRollLoggerTest::kLogFile.c_str());
size_t lines = std::count(std::istreambuf_iterator<char>(inFile),
std::istreambuf_iterator<char>(), '\n');
ASSERT_EQ(log_lines, lines);
inFile.close();
}
// Test the logger Header function for roll over logs
// We expect the new logs creates as roll over to carry the headers specified
static std::vector<std::string> GetOldFileNames(const std::string& path) {
std::vector<std::string> ret;
const std::string dirname = path.substr(/*start=*/0, path.find_last_of("/"));
const std::string fname = path.substr(path.find_last_of("/") + 1);
std::vector<std::string> children;
Env::Default()->GetChildren(dirname, &children);
// We know that the old log files are named [path]<something>
// Return all entities that match the pattern
for (auto& child : children) {
if (fname != child && child.find(fname) == 0) {
ret.push_back(dirname + "/" + child);
}
}
return ret;
}
// Return the number of lines where a given pattern was found in the file
static size_t GetLinesCount(const std::string& fname,
const std::string& pattern) {
std::stringstream ssbuf;
std::string line;
size_t count = 0;
std::ifstream inFile(fname.c_str());
ssbuf << inFile.rdbuf();
while (getline(ssbuf, line)) {
if (line.find(pattern) != std::string::npos) {
count++;
}
}
return count;
}
TEST_F(AutoRollLoggerTest, LogHeaderTest) {
static const size_t MAX_HEADERS = 10;
static const size_t LOG_MAX_SIZE = 1024 * 5;
static const std::string HEADER_STR = "Log header line";
// test_num == 0 -> standard call to Header()
// test_num == 1 -> call to Log() with InfoLogLevel::HEADER_LEVEL
for (int test_num = 0; test_num < 2; test_num++) {
InitTestDb();
AutoRollLogger logger(Env::Default(), kTestDir, /*db_log_dir=*/ "",
LOG_MAX_SIZE, /*log_file_time_to_roll=*/ 0);
if (test_num == 0) {
// Log some headers explicitly using Header()
for (size_t i = 0; i < MAX_HEADERS; i++) {
Header(&logger, "%s %d", HEADER_STR.c_str(), i);
}
} else if (test_num == 1) {
// HEADER_LEVEL should make this behave like calling Header()
for (size_t i = 0; i < MAX_HEADERS; i++) {
ROCKS_LOG_HEADER(&logger, "%s %d", HEADER_STR.c_str(), i);
}
}
const std::string newfname = logger.TEST_log_fname();
// Log enough data to cause a roll over
int i = 0;
for (size_t iter = 0; iter < 2; iter++) {
while (logger.GetLogFileSize() < LOG_MAX_SIZE) {
Info(&logger, (kSampleMessage + ":LogHeaderTest line %d").c_str(), i);
++i;
}
Info(&logger, "Rollover");
}
// Flush the log for the latest file
LogFlush(&logger);
const auto oldfiles = GetOldFileNames(newfname);
ASSERT_EQ(oldfiles.size(), (size_t) 2);
for (auto& oldfname : oldfiles) {
// verify that the files rolled over
ASSERT_NE(oldfname, newfname);
// verify that the old log contains all the header logs
ASSERT_EQ(GetLinesCount(oldfname, HEADER_STR), MAX_HEADERS);
}
}
}
TEST_F(AutoRollLoggerTest, LogFileExistence) {
rocksdb::DB* db;
rocksdb::Options options;
#ifdef OS_WIN
// Replace all slashes in the path so windows CompSpec does not
// become confused
std::string testDir(kTestDir);
std::replace_if(testDir.begin(), testDir.end(),
[](char ch) { return ch == '/'; }, '\\');
std::string deleteCmd = "if exist " + testDir + " rd /s /q " + testDir;
#else
std::string deleteCmd = "rm -rf " + kTestDir;
#endif
ASSERT_EQ(system(deleteCmd.c_str()), 0);
options.max_log_file_size = 100 * 1024 * 1024;
options.create_if_missing = true;
ASSERT_OK(rocksdb::DB::Open(options, kTestDir, &db));
ASSERT_OK(default_env->FileExists(kLogFile));
delete db;
}
} // namespace rocksdb
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
#else
#include <stdio.h>
int main(int argc, char** argv) {
fprintf(stderr,
"SKIPPED as AutoRollLogger is not supported in ROCKSDB_LITE\n");
return 0;
}
#endif // !ROCKSDB_LITE