Get rid off threadpool for nagios checks.

components/checker/checkercomponent.cpp

@@ -41,7 +41,7 @@ void CheckerComponent::Start(void)
 	m_CheckTimer->OnTimerExpired.connect(boost::bind(&CheckerComponent::CheckTimerHandler, this));
 	m_CheckTimer->Start();
 
-	CheckTask::RegisterType("nagios", NagiosCheckTask::CreateTask, NagiosCheckTask::FlushQueue, NagiosCheckTask::GetFinishedTasks);
+	NagiosCheckTask::Register();
 
 	m_ResultTimer = boost::make_shared<Timer>();
 	m_ResultTimer->SetInterval(5);

icinga/checktask.cpp

@@ -3,6 +3,8 @@
 using namespace icinga;
 
 map<string, CheckTaskType> CheckTask::m_Types;
+vector<CheckTask::Ptr> CheckTask::m_FinishedTasks;
+mutex CheckTask::m_FinishedTasksMutex;
 
 CheckTask::CheckTask(const Service& service)
 	: m_Service(service)
@@ -13,12 +15,11 @@ Service CheckTask::GetService(void) const
 	return m_Service;
 }
 
-void CheckTask::RegisterType(string type, Factory factory, QueueFlusher qflusher, FinishedTasksGetter qtasksgetter)
+void CheckTask::RegisterType(string type, Factory factory, QueueFlusher qflusher)
 {
 	CheckTaskType ctt;
 	ctt.Factory = factory;
 	ctt.QueueFlusher = qflusher;
-	ctt.FinishedTasksGetter = qtasksgetter;
 
 	m_Types[type] = ctt;
 }
@@ -49,12 +50,16 @@ void CheckTask::FlushQueue(void)
 
 vector<CheckTask::Ptr> CheckTask::GetFinishedTasks(void)
 {
-	vector<CheckTask::Ptr> tasks;
+	mutex::scoped_lock lock(m_FinishedTasksMutex);
 
-	map<string, CheckTaskType>::iterator it;
+	vector<CheckTask::Ptr> result = m_FinishedTasks;
-	for (it = m_Types.begin(); it != m_Types.end(); it++)
+	m_FinishedTasks.clear();
-		it->second.FinishedTasksGetter(tasks);
 
-	return tasks;
+	return result;
 }
 
+void CheckTask::FinishTask(const CheckTask::Ptr& task)
+{
+	mutex::scoped_lock lock(m_FinishedTasksMutex);
+	m_FinishedTasks.push_back(task);
+}

icinga/checktask.h

@@ -34,17 +34,18 @@ public:
 
 	typedef function<CheckTask::Ptr(const Service&)> Factory;
 	typedef function<void()> QueueFlusher;
-	typedef function<void (vector<CheckTask::Ptr>& tasks)> FinishedTasksGetter;
 
 	Service GetService(void) const;
 
 	virtual void Enqueue(void) = 0;
 	virtual CheckResult GetResult(void) = 0;
 
-	static void RegisterType(string type, Factory factory, QueueFlusher qflusher, FinishedTasksGetter qtasksgetter);
+	static void RegisterType(string type, Factory factory, QueueFlusher qflusher);
 	static CheckTask::Ptr CreateTask(const Service& service);
 	static void Enqueue(const CheckTask::Ptr& task);
 	static void FlushQueue(void);
+
+	static void FinishTask(const CheckTask::Ptr& task);
 	static vector<CheckTask::Ptr> GetFinishedTasks(void);
 
 protected:
@@ -54,13 +55,15 @@ private:
 	Service m_Service;
 
 	static map<string, CheckTaskType> m_Types;
+
+	static vector<CheckTask::Ptr> m_FinishedTasks;
+	static mutex m_FinishedTasksMutex;
 };
 
 struct CheckTaskType
 {
 	CheckTask::Factory Factory;
 	CheckTask::QueueFlusher QueueFlusher;
-	CheckTask::FinishedTasksGetter FinishedTasksGetter;
 };
 
 }

icinga/nagioschecktask.cpp

@@ -5,13 +5,12 @@
 
 using namespace icinga;
 
-list<ThreadPoolTask::Ptr> NagiosCheckTask::m_QueuedTasks;
+boost::mutex NagiosCheckTask::m_Mutex;
-
+deque<NagiosCheckTask::Ptr> NagiosCheckTask::m_Tasks;
-boost::mutex NagiosCheckTask::m_FinishedTasksMutex;
+condition_variable NagiosCheckTask::m_TasksCV;
-vector<CheckTask::Ptr> NagiosCheckTask::m_FinishedTasks;
 
 NagiosCheckTask::NagiosCheckTask(const Service& service)
-	: CheckTask(service)
+	: CheckTask(service), m_FP(NULL)
 {
 	string checkCommand = service.GetCheckCommand();
 	m_Command = MacroProcessor::ResolveMacros(checkCommand, service.GetMacros()); // + " 2>&1";
@@ -20,21 +19,16 @@ NagiosCheckTask::NagiosCheckTask(const Service& service)
 void NagiosCheckTask::Enqueue(void)
 {
 	time(&m_Result.StartTime);
-	m_QueuedTasks.push_back(static_pointer_cast<ThreadPoolTask>(static_cast<NagiosCheckTask::Ptr>(GetSelf())));
+
-//	m_QueuedTasks.push_back(new ThreadPool:Task(bind(&NagiosCheckTask::Execute, static_cast<NagiosCheckTask::Ptr>(GetSelf()))));
+	{
+			mutex::scoped_lock lock(m_Mutex);
+			m_Tasks.push_back(GetSelf());
+	}
 }
 
 void NagiosCheckTask::FlushQueue(void)
 {
-	ThreadPool::GetDefaultPool()->EnqueueTasks(m_QueuedTasks);
+	m_TasksCV.notify_all();
-	m_QueuedTasks.clear();
-}
-
-void NagiosCheckTask::GetFinishedTasks(vector<CheckTask::Ptr>& tasks)
-{
-	mutex::scoped_lock lock(m_FinishedTasksMutex);
-	std::copy(m_FinishedTasks.begin(), m_FinishedTasks.end(), back_inserter(tasks));
-	m_FinishedTasks.clear();
 }
 
 CheckResult NagiosCheckTask::GetResult(void)
@@ -42,56 +36,113 @@ CheckResult NagiosCheckTask::GetResult(void)
 	return m_Result;
 }
 
-void NagiosCheckTask::Execute(void)
+void NagiosCheckTask::CheckThreadProc(void)
 {
-	RunCheck();
+	mutex::scoped_lock lock(m_Mutex);
 
-	{
+	map<int, NagiosCheckTask::Ptr> tasks;
-		mutex::scoped_lock lock(m_FinishedTasksMutex);
+	const int maxTasks = 16;
-		m_FinishedTasks.push_back(GetSelf());
+
+	for (;;) {
+		while (m_Tasks.empty() || tasks.size() >= maxTasks) {
+			lock.unlock();
+
+			map<int, NagiosCheckTask::Ptr>::iterator it, prev;
+
+#ifndef _MSC_VER
+			fd_set readfds;
+			int nfds = 0;
+			
+			FD_ZERO(&readfds);
+
+			for (it = tasks.begin(); it != tasks.end(); it++) {
+				if (it->first > nfds)
+					nfds = it->first;
+
+				FD_SET(it->first, &readfds);
+			}
+
+			timeval tv;
+			tv.tv_sec = 1;
+			tv.tv_usec = 0;
+			select(nfds + 1, &readfds, NULL, NULL, &tv);
+#else /* _MSC_VER */
+			Sleep(1000);
+#endif /* _MSC_VER */
+
+			for (it = tasks.begin(); it != tasks.end(); ) {
+#ifndef _MSC_VER
+				if (!FD_ISSET(it->first, &readfds)) {
+					it++;
+					continue;
+				}
+#endif /* _MSC_VER */
+
+				if (!it->second->RunTask()) {
+					CheckTask::FinishTask(it->second);
+					it = tasks.erase(it);
+				} else {
+					it++;
+				}
+			}
+
+			lock.lock();
+		}
+
+		while (!m_Tasks.empty() && tasks.size() < maxTasks) {
+			NagiosCheckTask::Ptr task = m_Tasks.front();
+			m_Tasks.pop_front();
+			if (!task->InitTask()) {
+				CheckTask::FinishTask(task);
+			} else {
+				int fd = task->GetFD();
+				if (fd >= 0)
+					tasks[fd] = task;
+			}
+		}
 	}
 }
 
-void NagiosCheckTask::RunCheck(void)
+bool NagiosCheckTask::InitTask(void)
 {
-	FILE *fp;
-
 #ifdef _MSC_VER
-	fp = _popen(m_Command.c_str(), "r");
+	m_FP = _popen(m_Command.c_str(), "r");
 #else /* _MSC_VER */
 	bool use_libc_popen = false;
 
 	popen_noshell_pass_to_pclose pclose_arg;
 
 	if (!use_libc_popen) {
-		fp = popen_noshell_compat(m_Command.c_str(), "r", &pclose_arg);
+		m_FP = popen_noshell_compat(m_Command.c_str(), "r", &pclose_arg);
 
-		if (fp == NULL) // TODO: add check for valgrind
+		if (m_FP == NULL) // TODO: add check for valgrind
 			use_libc_popen = true;
 	}
 
 	if (use_libc_popen)
-		fp = popen(m_Command.c_str(), "r");
+		m_FP = popen(m_Command.c_str(), "r");
 #endif /* _MSC_VER */
 
-	stringstream outputbuf;
+	return (m_FP != NULL);
+}
 
-	while (!feof(fp)) {
+bool NagiosCheckTask::RunTask(void)
+{
 	char buffer[512];
-		size_t read = fread(buffer, 1, sizeof(buffer), fp);
+	size_t read = fread(buffer, 1, sizeof(buffer), m_FP);
 
-		if (read == 0)
+	if (read > 0)
-			break;
+		m_OutputStream.write(buffer, read);
 
-		outputbuf.write(buffer, read);
+	if (!feof(m_FP))
-	}
+		return true;
 
-	m_Result.Output = outputbuf.str();
+	m_Result.Output = m_OutputStream.str();
 	boost::algorithm::trim(m_Result.Output);
 
 	int status, exitcode;
 #ifdef _MSC_VER
-	status = _pclose(fp);
+	status = _pclose(m_FP);
 #else /* _MSC_VER */
 	if (use_libc_popen)
 		status = pclose(fp);
@@ -128,9 +179,26 @@ void NagiosCheckTask::RunCheck(void)
 #endif /* _MSC_VER */
 
 	time(&m_Result.EndTime);
+
+	return false;
+}
+
+int NagiosCheckTask::GetFD(void) const
+{
+	return fileno(m_FP);
 }
 
 CheckTask::Ptr NagiosCheckTask::CreateTask(const Service& service)
 {
 	return boost::make_shared<NagiosCheckTask>(service);
 }
+
+void NagiosCheckTask::Register(void)
+{
+	CheckTask::RegisterType("nagios", NagiosCheckTask::CreateTask, NagiosCheckTask::FlushQueue);
+
+	for (int i = 0; i < 1; i++) {
+		thread t(&NagiosCheckTask::CheckThreadProc);
+		t.detach();
+	}
+}

icinga/nagioschecktask.h

@@ -4,7 +4,7 @@
 namespace icinga
 {
 
-class I2_ICINGA_API NagiosCheckTask : public CheckTask, public ThreadPoolTask
+class I2_ICINGA_API NagiosCheckTask : public CheckTask
 {
 public:
 	typedef shared_ptr<NagiosCheckTask> Ptr;
@@ -17,19 +17,25 @@ public:
 
 	static CheckTask::Ptr CreateTask(const Service& service);
 	static void FlushQueue(void);
-	static void GetFinishedTasks(vector<CheckTask::Ptr>& tasks);
+
+	static void Register(void);
 
 private:
 	string m_Command;
 	CheckResult m_Result;
 
-	static list<ThreadPoolTask::Ptr> m_QueuedTasks;
+	FILE *m_FP;
+	stringstream m_OutputStream;
 
-	static boost::mutex m_FinishedTasksMutex;
+	static boost::mutex m_Mutex;
-	static vector<CheckTask::Ptr> m_FinishedTasks;
+	static deque<NagiosCheckTask::Ptr> m_Tasks;
+	static condition_variable m_TasksCV;
 
-	virtual void Execute(void);
+	static void CheckThreadProc(void);
-	void RunCheck(void);
+
+	bool InitTask(void);
+	bool RunTask(void);
+	int GetFD(void) const;
 };
 
 }