src/logging.cc: encapsulate log cleaner
This commit is contained in:
Marco Wang
parent
1b7d541431
commit
3b5f2807f4
221
src/logging.cc
221
src/logging.cc
@ -457,6 +457,29 @@ class LogFileObject : public base::Logger {
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bool CreateLogfile(const string& time_pid_string);
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};
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// Encapsulate all log cleaner related states
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class LogCleaner {
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public:
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LogCleaner();
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virtual ~LogCleaner() {}
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void Enable(int overdue_days);
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void Disable();
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void Run() const;
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inline bool enabled() const { return enabled_; }
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private:
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bool IsLogFromCurrentProject(const string& filename) const;
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bool IsLogLastModifiedOver(const string& filepath, int days) const;
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vector<string> GetOverdueLogNames(string log_directory, int days) const;
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bool enabled_;
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int overdue_days_;
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};
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LogCleaner log_cleaner;
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} // namespace
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class LogDestination {
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@ -839,86 +862,6 @@ void LogDestination::DeleteLogDestinations() {
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sinks_ = NULL;
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}
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namespace {
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bool IsGlogLog(const string& filename) {
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// Check if filename matches the pattern of a glog file:
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// "<program name>.<hostname>.<user name>.log...".
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const int kKeywordCount = 4;
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std::string keywords[kKeywordCount] = {
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glog_internal_namespace_::ProgramInvocationShortName(),
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LogDestination::hostname(),
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MyUserName(),
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"log"
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};
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int start_pos = 0;
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for (int i = 0; i < kKeywordCount; i++) {
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if (filename.find(keywords[i], start_pos) == filename.npos) {
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return false;
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}
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start_pos += keywords[i].size() + 1;
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}
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return true;
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}
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bool LastModifiedOver(const string& filepath, int days) {
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// Try to get the last modified time of this file.
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struct stat file_stat;
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if (stat(filepath.c_str(), &file_stat) == 0) {
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// A day is 86400 seconds, so 7 days is 86400 * 7 = 604800 seconds.
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time_t last_modified_time = file_stat.st_mtime;
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time_t current_time = time(NULL);
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return difftime(current_time, last_modified_time) > days * 86400;
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}
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// If failed to get file stat, don't return true!
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return false;
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}
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vector<string> GetOverdueLogNames(string log_directory, int days) {
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// The names of overdue logs.
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vector<string> overdue_log_names;
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// Try to get all files within log_directory.
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DIR *dir;
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struct dirent *ent;
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char dir_delim = '/';
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#ifdef OS_WINDOWS
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dir_delim = '\\';
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#endif
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// If log_directory doesn't end with a slash, append a slash to it.
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if (log_directory.at(log_directory.size() - 1) != dir_delim) {
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log_directory += dir_delim;
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}
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if ((dir=opendir(log_directory.c_str()))) {
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while ((ent=readdir(dir))) {
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if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) {
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continue;
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}
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string filepath = log_directory + ent->d_name;
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if (IsGlogLog(ent->d_name) && LastModifiedOver(filepath, days)) {
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overdue_log_names.push_back(filepath);
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}
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}
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closedir(dir);
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}
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return overdue_log_names;
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}
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// Is log_cleaner enabled?
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// This option can be enabled by calling google::EnableLogCleaner(days)
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bool log_cleaner_enabled_;
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int log_cleaner_overdue_days_ = 7;
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} // namespace
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namespace {
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LogFileObject::LogFileObject(LogSeverity severity,
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@ -1269,18 +1212,110 @@ void LogFileObject::Write(bool force_flush,
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}
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#endif
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// Perform clean up for old logs
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if (log_cleaner_enabled_) {
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const vector<string>& dirs = GetLoggingDirectories();
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for (size_t i = 0; i < dirs.size(); i++) {
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vector<string> logs = GetOverdueLogNames(dirs[i], log_cleaner_overdue_days_);
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for (size_t j = 0; j < logs.size(); j++) {
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static_cast<void>(unlink(logs[j].c_str()));
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}
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}
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if (log_cleaner.enabled()) {
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log_cleaner.Run();
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}
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}
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}
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LogCleaner::LogCleaner() : enabled_(false), overdue_days_(7) {}
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void LogCleaner::Enable(int overdue_days) {
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// Setting overdue_days to 0 day should not be allowed!
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// Since all logs will be deleted immediately, which will cause troubles.
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assert(overdue_days > 0);
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enabled_ = true;
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overdue_days_ = overdue_days;
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}
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void LogCleaner::Disable() {
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enabled_ = false;
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}
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void LogCleaner::Run() const {
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assert(enabled_ && overdue_days_ > 0);
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const vector<string>& dirs = GetLoggingDirectories();
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for (size_t i = 0; i < dirs.size(); i++) {
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vector<string> logs = GetOverdueLogNames(dirs[i], overdue_days_);
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for (size_t j = 0; j < logs.size(); j++) {
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static_cast<void>(unlink(logs[j].c_str()));
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}
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}
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}
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bool LogCleaner::IsLogFromCurrentProject(const string& filename) const {
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// Check if filename matches the pattern of a glog file:
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// "<program name>.<hostname>.<user name>.log...".
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const int kKeywordCount = 4;
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std::string keywords[kKeywordCount] = {
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glog_internal_namespace_::ProgramInvocationShortName(),
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LogDestination::hostname(),
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MyUserName(),
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"log"
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};
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int start_pos = 0;
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for (int i = 0; i < kKeywordCount; i++) {
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if (filename.find(keywords[i], start_pos) == filename.npos) {
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return false;
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}
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start_pos += keywords[i].size() + 1;
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}
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return true;
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}
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bool LogCleaner::IsLogLastModifiedOver(const string& filepath, int days) const {
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// Try to get the last modified time of this file.
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struct stat file_stat;
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if (stat(filepath.c_str(), &file_stat) == 0) {
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// A day is 86400 seconds, so 7 days is 86400 * 7 = 604800 seconds.
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time_t last_modified_time = file_stat.st_mtime;
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time_t current_time = time(NULL);
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return difftime(current_time, last_modified_time) > days * 86400;
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}
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// If failed to get file stat, don't return true!
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return false;
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}
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vector<string> LogCleaner::GetOverdueLogNames(string log_directory, int days) const {
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// The names of overdue logs.
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vector<string> overdue_log_names;
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// Try to get all files within log_directory.
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DIR *dir;
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struct dirent *ent;
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char dir_delim = '/';
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#ifdef OS_WINDOWS
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dir_delim = '\\';
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#endif
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// If log_directory doesn't end with a slash, append a slash to it.
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if (log_directory.at(log_directory.size() - 1) != dir_delim) {
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log_directory += dir_delim;
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}
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if ((dir=opendir(log_directory.c_str()))) {
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while ((ent=readdir(dir))) {
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if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) {
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continue;
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}
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string filepath = log_directory + ent->d_name;
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if (IsLogFromCurrentProject(ent->d_name) && IsLogLastModifiedOver(filepath, days)) {
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overdue_log_names.push_back(filepath);
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}
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}
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closedir(dir);
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}
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return overdue_log_names;
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}
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} // namespace
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// Static log data space to avoid alloc failures in a LOG(FATAL)
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@ -2319,17 +2354,11 @@ void ShutdownGoogleLogging() {
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}
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void EnableLogCleaner(int overdue_days) {
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log_cleaner_enabled_ = true;
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// Setting overdue_days to 0 day should not be allowed!
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// Since all logs will be deleted immediately, which will cause troubles.
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if (overdue_days > 0) {
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log_cleaner_overdue_days_ = overdue_days;
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}
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log_cleaner.Enable(overdue_days);
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}
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void DisableLogCleaner() {
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log_cleaner_enabled_ = false;
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log_cleaner.Disable();
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}
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_END_GOOGLE_NAMESPACE_
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