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/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
#ifndef EVENTQUEUE_H
#define EVENTQUEUE_H
#include "remote/httphandler.hpp"
#include "base/object.hpp"
#include "config/expression.hpp"
#include <boost/asio/deadline_timer.hpp>
#include <boost/asio/spawn.hpp>
#include <condition_variable>
#include <cstddef>
#include <cstdint>
#include <mutex>
#include <set>
#include <map>
#include <deque>
#include <queue>
namespace icinga
{
class EventQueue final : public Object
{
public:
DECLARE_PTR_TYPEDEFS(EventQueue);
EventQueue(String name);
bool CanProcessEvent(const String& type) const;
void ProcessEvent(const Dictionary::Ptr& event);
void AddClient(void *client);
void RemoveClient(void *client);
void SetTypes(const std::set<String>& types);
void SetFilter(std::unique_ptr<Expression> filter);
Dictionary::Ptr WaitForEvent(void *client, double timeout = 5);
static std::vector<EventQueue::Ptr> GetQueuesForType(const String& type);
static EventQueue::Ptr GetByName(const String& name);
static void Register(const String& name, const EventQueue::Ptr& function);
private:
String m_Name;
mutable std::mutex m_Mutex;
std::condition_variable m_CV;
std::set<String> m_Types;
std::unique_ptr<Expression> m_Filter;
std::map<void *, std::deque<Dictionary::Ptr> > m_Events;
};
/**
* A registry for API event queues.
*
* @ingroup base
*/
class EventQueueRegistry : public Registry<EventQueueRegistry, EventQueue::Ptr>
{
public:
static EventQueueRegistry *GetInstance();
};
enum class EventType : uint_fast8_t
{
AcknowledgementCleared,
AcknowledgementSet,
CheckResult,
CommentAdded,
CommentRemoved,
DowntimeAdded,
DowntimeRemoved,
DowntimeStarted,
DowntimeTriggered,
Flapping,
Notification,
StateChange,
ObjectCreated,
ObjectDeleted,
ObjectModified
};
class EventsInbox : public Object
{
public:
DECLARE_PTR_TYPEDEFS(EventsInbox);
EventsInbox(String filter, const String& filterSource);
EventsInbox(const EventsInbox&) = delete;
EventsInbox(EventsInbox&&) = delete;
EventsInbox& operator=(const EventsInbox&) = delete;
EventsInbox& operator=(EventsInbox&&) = delete;
~EventsInbox();
const Expression::Ptr& GetFilter();
void Push(Dictionary::Ptr event);
Dictionary::Ptr Shift(boost::asio::yield_context yc, double timeout = 5);
private:
struct Filter
{
std::size_t Refs;
Expression::Ptr Expr;
};
static std::mutex m_FiltersMutex;
static std::map<String, Filter> m_Filters;
std::mutex m_Mutex;
decltype(m_Filters.begin()) m_Filter;
std::queue<Dictionary::Ptr> m_Queue;
boost::asio::deadline_timer m_Timer;
};
class EventsSubscriber
{
public:
EventsSubscriber(std::set<EventType> types, String filter, const String& filterSource);
EventsSubscriber(const EventsSubscriber&) = delete;
EventsSubscriber(EventsSubscriber&&) = delete;
EventsSubscriber& operator=(const EventsSubscriber&) = delete;
EventsSubscriber& operator=(EventsSubscriber&&) = delete;
~EventsSubscriber();
const EventsInbox::Ptr& GetInbox();
private:
std::set<EventType> m_Types;
EventsInbox::Ptr m_Inbox;
};
class EventsFilter
{
public:
EventsFilter(std::map<Expression::Ptr, std::set<EventsInbox::Ptr>> inboxes);
operator bool();
void Push(Dictionary::Ptr event);
private:
std::map<Expression::Ptr, std::set<EventsInbox::Ptr>> m_Inboxes;
};
class EventsRouter
{
public:
static EventsRouter& GetInstance();
void Subscribe(const std::set<EventType>& types, const EventsInbox::Ptr& inbox);
void Unsubscribe(const std::set<EventType>& types, const EventsInbox::Ptr& inbox);
EventsFilter GetInboxes(EventType type);
private:
static EventsRouter m_Instance;
EventsRouter() = default;
EventsRouter(const EventsRouter&) = delete;
EventsRouter(EventsRouter&&) = delete;
EventsRouter& operator=(const EventsRouter&) = delete;
EventsRouter& operator=(EventsRouter&&) = delete;
~EventsRouter() = default;
std::mutex m_Mutex;
std::map<EventType, std::map<Expression::Ptr, std::set<EventsInbox::Ptr>>> m_Subscribers;
};
}
#endif /* EVENTQUEUE_H */
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