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/**
* Copyright 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include <boost/filesystem.hpp>
#include <boost/scoped_ptr.hpp>
#include <fstream>
#include <ostream>
#include "mongo/db/storage/storage_engine_lock_file.h"
#include "mongo/platform/process_id.h"
#include "mongo/unittest/temp_dir.h"
#include "mongo/unittest/unittest.h"
namespace {
using std::string;
using mongo::unittest::TempDir;
using namespace mongo;
TEST(StorageEngineLockFileTest, UncleanShutdownNoExistingFile) {
TempDir tempDir("StorageEngineLockFileTest_UncleanShutdownNoExistingFile");
StorageEngineLockFile lockFile(tempDir.path());
ASSERT_FALSE(lockFile.createdByUncleanShutdown());
}
TEST(StorageEngineLockFileTest, UncleanShutdownEmptyExistingFile) {
TempDir tempDir("StorageEngineLockFileTest_UncleanShutdownEmptyExistingFile");
{
std::string filename(tempDir.path() + "/mongod.lock");
std::ofstream(filename.c_str());
}
StorageEngineLockFile lockFile(tempDir.path());
ASSERT_FALSE(lockFile.createdByUncleanShutdown());
}
TEST(StorageEngineLockFileTest, UncleanShutdownNonEmptyExistingFile) {
TempDir tempDir("StorageEngineLockFileTest_UncleanShutdownNonEmptyExistingFile");
{
std::string filename(tempDir.path() + "/mongod.lock");
std::ofstream ofs(filename.c_str());
ofs << 12345 << std::endl;
}
StorageEngineLockFile lockFile(tempDir.path());
ASSERT_TRUE(lockFile.createdByUncleanShutdown());
}
TEST(StorageEngineLockFileTest, OpenInvalidDirectory) {
StorageEngineLockFile lockFile("no_such_directory");
ASSERT_EQUALS((boost::filesystem::path("no_such_directory") / "mongod.lock").string(),
lockFile.getFilespec());
Status status = lockFile.open();
ASSERT_NOT_OK(status);
ASSERT_EQUALS(ErrorCodes::NonExistentPath, status.code());
}
// Cause ::open() to fail by providing a regular file instead of a directory for 'dbpath'.
TEST(StorageEngineLockFileTest, OpenInvalidFilename) {
TempDir tempDir("StorageEngineLockFileTest_OpenInvalidFilename");
std::string filename(tempDir.path() + "/some_file");
std::ofstream(filename.c_str());
StorageEngineLockFile lockFile(filename);
Status status = lockFile.open();
ASSERT_NOT_OK(status);
ASSERT_EQUALS(ErrorCodes::DBPathInUse, status.code());
}
TEST(StorageEngineLockFileTest, OpenNoExistingLockFile) {
TempDir tempDir("StorageEngineLockFileTest_OpenNoExistingLockFile");
StorageEngineLockFile lockFile(tempDir.path());
ASSERT_OK(lockFile.open());
lockFile.close();
}
TEST(StorageEngineLockFileTest, OpenEmptyLockFile) {
TempDir tempDir("StorageEngineLockFileTest_OpenEmptyLockFile");
StorageEngineLockFile lockFile(tempDir.path());
std::string filename(lockFile.getFilespec());
std::ofstream(filename.c_str());
ASSERT_OK(lockFile.open());
lockFile.close();
}
TEST(StorageEngineLockFileTest, WritePidFileNotOpened) {
TempDir tempDir("StorageEngineLockFileTest_WritePidFileNotOpened");
StorageEngineLockFile lockFile(tempDir.path());
Status status = lockFile.writePid();
ASSERT_NOT_OK(status);
ASSERT_EQUALS(ErrorCodes::FileNotOpen, status.code());
}
TEST(StorageEngineLockFileTest, WritePidFileOpened) {
TempDir tempDir("StorageEngineLockFileTest_WritePidFileOpened");
StorageEngineLockFile lockFile(tempDir.path());
ASSERT_OK(lockFile.open());
ASSERT_OK(lockFile.writePid());
lockFile.close();
// Read PID from lock file.
std::string filename(lockFile.getFilespec());
std::ifstream ifs(filename.c_str());
int64_t pidFromLockFile = 0;
ASSERT_TRUE(ifs >> pidFromLockFile);
ASSERT_EQUALS(ProcessId::getCurrent().asInt64(), pidFromLockFile);
}
// Existing data in lock file must be removed before writing process ID.
TEST(StorageEngineLockFileTest, WritePidTruncateExistingFile) {
TempDir tempDir("StorageEngineLockFileTest_WritePidTruncateExistingFile");
StorageEngineLockFile lockFile(tempDir.path());
{
std::string filename(tempDir.path() + "/mongod.lock");
std::ofstream ofs(filename.c_str());
std::string currentPidStr = ProcessId::getCurrent().toString();
ASSERT_FALSE(currentPidStr.empty());
ofs << std::string(currentPidStr.size() * 100, 'X') << std::endl;
}
ASSERT_OK(lockFile.open());
ASSERT_OK(lockFile.writePid());
lockFile.close();
// Read PID from lock file.
std::string filename(lockFile.getFilespec());
std::ifstream ifs(filename.c_str());
int64_t pidFromLockFile = 0;
ASSERT_TRUE(ifs >> pidFromLockFile);
ASSERT_EQUALS(ProcessId::getCurrent().asInt64(), pidFromLockFile);
// There should not be any data in the file after the process ID.
std::string extraData;
ASSERT_FALSE(ifs >> extraData);
}
TEST(StorageEngineLockFileTest, ClearPidAndUnlock) {
TempDir tempDir("StorageEngineLockFileTest_ClearPidAndUnlock");
StorageEngineLockFile lockFile(tempDir.path());
ASSERT_OK(lockFile.open());
ASSERT_OK(lockFile.writePid());
// Clear lock file contents.
lockFile.clearPidAndUnlock();
ASSERT_TRUE(boost::filesystem::exists(lockFile.getFilespec()));
ASSERT_EQUALS(0U, boost::filesystem::file_size(lockFile.getFilespec()));
}
} // namespace
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