Add content to post , Add SchedularTimer

CMakeLists.txt

@@ -27,7 +27,7 @@ include_directories(SYSTEM ../3party/mongoose)
 include_directories(SYSTEM /usr/include/hiredis)
 # recursive search files cpp files
 file(GLOB_RECURSE SOURCES "src/*.cpp")
-set (3PARTY_SOURCES ../3party/mongoose/mongoose.c)
+set (3PARTY_SOURCES ../3party/mongoose/mongoose.c src/utils/ScheduledTimer.cpp src/utils/ScheduledTimer.h)
 
 #Generate the shared library from the sources
 add_library(Microservice SHARED ${SOURCES} ${3PARTY_SOURCES})

doc/install-dependencies.sh

@@ -6,4 +6,4 @@
 # Created on May 8, 2016, 9:59:18 AM
 #
 sudo apt-get install -y libhiredis0.10 libhiredis-dev libzmq3 libzmq3-dev liblog4cpp5 liblog4cpp5-dev \
-    libgoogle-glog-dev
\ No newline at end of file
+    libgoogle-glog-dev libev-dev
\ No newline at end of file

src/Microservice_Iface.h

@@ -12,10 +12,13 @@
 #include <map>
 #include <vector>
 #include <document.h>
+#include <functional>
+#include <chrono>
 
 #include "Microservice_Defines.h"
 #include "common/MSTypes.h"
 #include "params/MSCommandParams.h"
+#include <boost/function.hpp>
 
 class cMicroservice_BaseRestResponse;
 class cMicroservice_BaseHandler;
@@ -140,6 +143,12 @@ namespace nsMicroservice_Iface
             virtual void stop() = 0;
 	};
 	
+        struct IHistogram
+        {
+            virtual void update(long value) = 0;
+            virtual long getCount() = 0;
+            virtual void clear() = 0;
+        };
 	/**
          * must be at the end of init , after the netrics are defined
          */
@@ -148,8 +157,8 @@ namespace nsMicroservice_Iface
 	virtual IMeter*   createMeter(std::string& name) = 0;
 	virtual ICounter* createCounter(std::string& name) = 0;
 	virtual ITimer*   createTimer(std::string& name) = 0;
+	virtual IHistogram* createHistogram(std::string& name) = 0;
         virtual void      GetMetrics(std::map<std::string,long>& metrics_map) = 0;	
-	
     };
     
     struct IPubSub
@@ -287,6 +296,7 @@ namespace nsMicroservice_Iface
         virtual bool   getByPattern(std::string& pattern,std::vector<std::pair<std::string,std::string>>& retKeyValues) = 0;
         virtual bool   exists(std::string& key) = 0;
     };
+
 }
 
 

src/impl/MSIMetricsFactoryDropwisardImpl.cpp

@@ -53,6 +53,10 @@ IMetricsFactory::ITimer* MSIMetricsFactoryDropwisardImpl::createTimer(std::strin
     return new ITimerDropwisardImpl(registry_->timer(name));
 }
 
+IMetricsFactory::IHistogram* MSIMetricsFactoryDropwisardImpl::createHistogram(std::string& name) {
+    return new IHistogramDropwizardImpl(registry_->histogram(name));
+}
+
 void MSIMetricsFactoryDropwisardImpl::startReporting()
 {
     char* graphite_hostport = getenv("graphite_hostport");
@@ -112,7 +116,7 @@ void MSIMetricsFactoryDropwisardImpl::GetMetrics(std::map<std::string, long>& me
     {
         register auto meter_ptr = meter.second;
         str.assign("meter." + meter.first);
-        metrics_map[str] = meter_ptr->getCount();
+        metrics_map[str + "count"] = meter_ptr->getCount();
         metrics_map[str + ".mean_rate"] = meter_ptr->getMeanRate();
         metrics_map[str + ".1m_rate"] = meter_ptr->getOneMinuteRate();
         metrics_map[str + ".5m_rate"] = meter_ptr->getFiveMinuteRate();
@@ -130,6 +134,16 @@ void MSIMetricsFactoryDropwisardImpl::GetMetrics(std::map<std::string, long>& me
 
     }
 
+    for (auto histogram : registry_->getHistograms())
+    {
+        register auto histogram_snapshot_ptr = histogram.second->getSnapshot();
+        str.assign("histogram." + histogram.first);
+        metrics_map[str + ".mean_rate"] = histogram_snapshot_ptr->getMean();
+        metrics_map[str + ".min"] = histogram_snapshot_ptr->getMin();
+        metrics_map[str + ".max"] = histogram_snapshot_ptr->getMax();
+        metrics_map[str + ".median"] = histogram_snapshot_ptr->getMedian();
+
+    }
 }
 
 void MSIMetricsFactoryDropwisardImpl::ConfigureAndStartGraphiteReporter() {

src/impl/MSIMetricsFactoryDropwisardImpl.h

@@ -41,6 +41,7 @@ public:
     IMetricsFactory::ICounter* createCounter(std::string& name) override;
     IMetricsFactory::IMeter* createMeter(std::string& name) override;
     IMetricsFactory::ITimer* createTimer(std::string& name) override;
+    IMetricsFactory::IHistogram* createHistogram(std::string& name) override;
     void startReporting() override;
     void stopReporting() override;
 
@@ -113,6 +114,20 @@ public:
        
     };
     
+    class IHistogramDropwizardImpl: public IHistogram
+    {
+    public:
+        IHistogramDropwizardImpl(cppmetrics::core::HistogramPtr histogram) :
+        histogram_(histogram) {
+        }
+
+        long getCount() override { return histogram_->getCount(); }
+        void update(long value) override { histogram_->update(value); }
+        void clear() override { histogram_->clear(); }
+    private:
+        cppmetrics::core::HistogramPtr histogram_;
+        
+    };
     
 };
 

src/impl/clients/MSICommandClientHttpImpl.cpp

@@ -90,7 +90,13 @@ void MSICommandClientHttpImpl::HandleCommand(HandleCommandData* p_cmd_data){
     {
         p_cmd_data->p_response->Reset();
         http_client client(url);
-        auto request_task = client.request(*p_cmd_data->p_mtd);
+        //config.set_timeout<std::chrono::seconds>(std::chrono::seconds(2));
+        http_request request(*p_cmd_data->p_mtd);
+        request.headers().add(header_names::accept,"*/*");
+        if(!p_cmd_data->p_cmd_params->GetContent().empty())
+            request.set_body(p_cmd_data->p_cmd_params->GetContent(),"application/json");
+        //auto request_task = client.request(*p_cmd_data->p_mtd);
+        auto request_task = client.request(request);
         if(p_cmd_data->p_cmd_params->IsAsync_())
         {
             request_task.then([&](http_response resp){

src/utils/ScheduledTimer.cpp

+//
+// Created by amir on 10/10/16.
+//
+
+#include <mhash.h>
+#include <boost/thread/mutex.hpp>
+#include <boost/atomic.hpp>
+#include <boost/asio/io_service.hpp>
+#include <boost/scoped_ptr.hpp>
+#include <boost/asio/deadline_timer.hpp>
+#include <boost/bind.hpp>
+#include <Microservice_App.h>
+#include <boost/asio.hpp>
+#include <boost/thread.hpp>
+#include "ScheduledTimer.h"
+
+#define LOG_ERROR(str) std::cerr << str << std::endl //if(p_logger_) p_logger_->error(str);
+
+namespace {
+    typedef boost::asio::deadline_timer Timer;
+    typedef boost::shared_ptr<Timer> TimerPtr;
+    typedef enum {
+        eFixed_Rate,
+        eFixed_Delay,
+        eOnce
+    }eTimerType;
+}
+
+class ScheduledTimer::Impl {
+
+public:
+    class TimerTask {
+        public:
+        TimerTask() :
+        period_(1000) {
+        };
+        TimerTask(TimerPtr timer, std::function<void()> task,
+                boost::posix_time::milliseconds period, eTimerType timerType) :
+        timer_(timer), task_(task), period_(period), timerType_(timerType) {
+
+        }
+        TimerPtr timer_;
+        std::function<void()> task_;
+        boost::posix_time::milliseconds period_;
+        eTimerType timerType_;
+    };
+
+private:
+    boost::atomic<bool> running_;
+    boost::asio::io_service io_service_;
+    boost::scoped_ptr<boost::asio::io_service::work> work_ptr_;
+    boost::thread_group thread_group_;
+
+    typedef std::map<std::string,TimerTask> TimerTasks;
+    TimerTasks timer_tasks_;
+    mutable boost::mutex timer_task_mutex_;
+
+public:
+    Impl(size_t pool_size):
+            running_(true),
+            work_ptr_(new boost::asio::io_service::work(io_service_)) {
+        for (size_t i = 0; i < pool_size; ++i) {
+            thread_group_.create_thread(
+                    boost::bind(&boost::asio::io_service::run, &io_service_));
+        }
+    }
+
+    virtual ~Impl() {
+        shutdownNow();
+    }
+
+    void scheduleAtFixedRate(std::string& timerKey, TimeoutCallback& toFunc, std::chrono::milliseconds period){
+        scheduleTimer(timerKey,toFunc,period,eFixed_Rate);
+    }
+    void scheduleAtFixedDelay(std::string& timerKey, TimeoutCallback& toFunc, std::chrono::milliseconds period){
+        scheduleTimer(timerKey,toFunc,period,eFixed_Rate);
+    }
+    void scheduleOnce(std::string& timerKey, TimeoutCallback& toFunc, std::chrono::milliseconds period){
+        scheduleTimer(timerKey,toFunc,period,eOnce);
+    }
+    void cancel(std::string& timerKey);
+    /**
+     * Shuts down the service, may or may not return immediately depending on the pending tasks.
+     */
+    virtual void shutdown();
+
+    /**
+     * Shuts down the service, will return immediately.
+     */
+    virtual void shutdownNow();
+
+    /**
+     * gets the threadpool state.
+     * @return True if this is shutdown or shutting down, false otherwise.
+     */
+    virtual bool isShutdown() const {
+        return !running_;
+    }
+
+    void cancelTimers();
+private:
+    void timerHandler(const boost::system::error_code& ec, std::string timerKey);
+
+
+    void scheduleTimer(std::string timerKey,
+                       TimeoutCallback& toFunc,
+                       std::chrono::milliseconds interval,
+                       eTimerType timerType);
+
+
+};
+
+void ScheduledTimer::Impl::shutdown() {
+    if (!running_) {
+        return;
+    }
+    running_ = false;
+    work_ptr_.reset();
+    thread_group_.interrupt_all();
+    thread_group_.join_all();
+}
+
+
+void ScheduledTimer::Impl::shutdownNow() {
+    if (!running_) {
+        return;
+    }
+    running_ = false;
+    cancelTimers();
+    io_service_.stop();
+    thread_group_.interrupt_all();
+    thread_group_.join_all();
+}
+
+void ScheduledTimer::Impl::timerHandler(const boost::system::error_code &ec, std::string timerKey) {
+    if (!running_) {
+        LOG_ERROR("Timer not started.");
+        return;
+    }
+
+    if (ec) {
+        LOG_ERROR(std::string("Unable to execute the timer, reason ").append(ec.message()));
+        return;
+    }
+
+    TimerTask timer_task;
+    try {
+        boost::lock_guard<boost::mutex> lock(timer_task_mutex_);
+        timer_task = timer_tasks_.at(timerKey);
+    }  catch (const std::out_of_range& oor) {
+        LOG_ERROR(std::string("Unable to find the timer at index ").append(timerKey));
+        return;
+    }
+
+    if (!timer_task.timer_) {
+        LOG_ERROR(std::string("Unable to find the timer at index ").append(timerKey));
+        return;
+    }
+
+    timer_task.task_();
+    boost::system::error_code eec;
+    switch (timer_task.timerType_) {
+        case eFixed_Rate:
+            timer_task.timer_->expires_at(
+                    timer_task.timer_->expires_at() + timer_task.period_, eec);
+            break;
+        case eFixed_Delay:
+            timer_task.timer_->expires_from_now(timer_task.period_, eec);
+            break;
+        case eOnce:
+            cancel(timerKey);
+            return; // don't reschedule
+            //break;
+    }
+
+    if (eec) {
+        LOG_ERROR(std::string("Unable to restart the time, reason ").append(eec.message()));
+    }
+    // reschedule
+    timer_task.timer_->async_wait(
+            boost::bind(&ScheduledTimer::Impl::timerHandler, this,
+                        boost::asio::placeholders::error, timerKey));
+
+}
+
+void ScheduledTimer::Impl::cancelTimers() {
+    {
+        boost::lock_guard<boost::mutex> lock(timer_task_mutex_);
+        for (auto entry : timer_tasks_){
+            boost::system::error_code ec;
+            entry.second.timer_->cancel(ec);
+        }
+
+    }
+}
+
+void ScheduledTimer::Impl::scheduleTimer(std::string timerKey,
+                                         TimeoutCallback& toFunc,
+                                         std::chrono::milliseconds interval,
+                                         eTimerType timerType) {
+    boost::posix_time::milliseconds period(interval.count());
+    TimerPtr timer(new Timer(io_service_, period));
+    size_t timer_index = 0;
+    {
+        boost::lock_guard<boost::mutex> lock(timer_task_mutex_);
+        timer_tasks_[timerKey] = TimerTask(timer, toFunc, period, timerType);
+        timer_index = timer_tasks_.size() - 1;
+    }
+    timer->async_wait(
+            boost::bind(&ScheduledTimer::Impl::timerHandler, this,
+                        boost::asio::placeholders::error, timerKey));
+
+}
+
+void ScheduledTimer::Impl::cancel(std::string &timerKey) {
+    boost::lock_guard<boost::mutex> lock(timer_task_mutex_);
+    auto entryItr = timer_tasks_.find(timerKey);
+    if (entryItr != timer_tasks_.end()) {
+        timer_tasks_.erase(timerKey);
+        boost::system::error_code ec;
+        entryItr->second.timer_->cancel(ec);
+    }
+}
+
+
+ScheduledTimer::ScheduledTimer() {
+    size_t pool_size = sysconf(_SC_NPROCESSORS_ONLN);
+    if (pool_size == 0)
+        pool_size = 1;
+    impl_ = std::make_shared<Impl>(pool_size);
+}
+
+void ScheduledTimer::start() {
+
+}
+
+/**
+ * stops to timers cancel all
+ * @param waitForCompletion - wait for comlete stop
+ */
+void ScheduledTimer::stop(bool waitForCompletion) {
+    if(waitForCompletion)
+        impl_->shutdownNow();
+    else
+        impl_->shutdown();
+}
+
+void ScheduledTimer::scheduleAtFixedRate(std::string &timerKey, TimeoutCallback toFunc, std::chrono::milliseconds period) {
+    impl_->scheduleAtFixedRate(timerKey,toFunc,period);
+}
+
+void ScheduledTimer::scheduleOnce(std::string &timerKey, TimeoutCallback toFunc, std::chrono::milliseconds period) {
+    impl_->scheduleOnce(timerKey,toFunc,period);
+}
+
+void ScheduledTimer::scheduleAtFixedDelay(std::string &timerKey, TimeoutCallback toFunc, std::chrono::milliseconds period) {
+    impl_->scheduleAtFixedDelay(timerKey,toFunc,period);
+}
+
+void ScheduledTimer::cancel(std::string &timerKey) {
+    impl_->cancel(timerKey);
+}
+
+void ScheduledTimer::cancelAll() {
+    impl_->cancelTimers();
+}

src/utils/ScheduledTimer.h

+//
+// Created by amir on 10/10/16.
+//
+
+#ifndef MICROSERVICE_SCHEDULEDTIMER_H
+#define MICROSERVICE_SCHEDULEDTIMER_H
+
+/**
+ * Scheduled timer for one time or intervals
+ */
+
+#include <functional>
+#include <chrono>
+#include <memory>
+
+using TimeoutCallback = std::function<void()>;
+
+class ScheduledTimer {
+public:
+    ScheduledTimer();
+
+    void start();
+    void stop(bool waitForCompletion);
+    void scheduleAtFixedRate(std::string& timerKey, TimeoutCallback toFunc, std::chrono::milliseconds period);
+    void scheduleAtFixedDelay(std::string& timerKey, TimeoutCallback toFunc, std::chrono::milliseconds period);
+    void scheduleOnce(std::string& timerKey, TimeoutCallback toFunc, std::chrono::milliseconds period);
+    void cancel(std::string& timerKey);
+    void cancelAll();
+
+private:
+    // keeping the implementation separated from h file
+    class Impl;
+    std::shared_ptr<Impl> impl_;
+};
+
+
+#endif //MICROSERVICE_SCHEDULEDTIMER_H

test/Microservice_Test.cpp

@@ -18,12 +18,14 @@
 #include <params/MSCommandParams.h>
 #include <common/MSTypes.h>
 #include <string.h>
+#include <iostream>
+#include <utils/ScheduledTimer.h>
 
 class cMicroserviceHandler: public cMicroservice_BaseHandler
 {
   char mba_GetReturnedString[1024];
     cMicroservice_Client* p_client_;
-
+    nsMicroservice_Iface::IMetricsFactory::IHistogram* p_histo;
 public:
   cMicroserviceHandler(const char* pba_GetReturnedString)
   {
@@ -67,6 +69,9 @@ public:
     else
         this->SendErrorResp(pc_reqCtx,retstat.GetError());
     //this->WriteObjectToResponse(pc_reqCtx,rpj_Doc);
+    // add metric
+    long value = rand() % 1000 + 1;
+    p_histo->update(value);
   }
 
   void DoUpdate(cMicroservice_RequestContext* pc_reqCtx)
@@ -81,9 +86,11 @@ public:
   void Init() {
       std::string other_service("other-service");
       auto port = this->mpc_Configuration->GetLong(std::string("server.port"),8000);
-      printf("port is: %u\n",(unsigned)port);
+      //printf("port is: %u\n",(unsigned)port);
       p_client_ = GetApp()->GetMSClient(other_service);
-      
+      srand (time(NULL));
+      std::string str("randy.random");
+      p_histo = this->GetApp()->GetMetricsFactory()->createHistogram(str);
   }
 
 };
@@ -147,6 +154,37 @@ void testCache(){
     pcc->delByPattern(key);
 }
 
+void to_func()
+{
+    std::cout << " regular boring function" << std::endl;
+}
+
+class TO
+{
+public:
+    void to_member_func() {
+        std::cout << " member boring function" << std::endl;
+    }
+};
+void test_timers()
+{
+    TO toA;
+    constexpr int NAGLOT = 1;
+
+    ScheduledTimer scheduledTimer;
+    for ( int i = 0 ; i < NAGLOT; i++) {
+        scheduledTimer.scheduleAtFixedRate(std::to_string(i).append("FixedRate"), [i] { std::cout << i << " inside exiting lambda!" << std::endl; },
+                                           std::chrono::milliseconds(1000));
+        scheduledTimer.scheduleAtFixedRate(std::to_string(i).append("FixedDelay"), std::bind(&to_func),
+                                           std::chrono::milliseconds(400));
+        scheduledTimer.scheduleOnce(std::to_string(i).append("Once"), std::bind(&TO::to_member_func,&toA),
+                                    std::chrono::milliseconds(2000));
+    }
+    std::this_thread::sleep_for(std::chrono::seconds(10));
+    std::cout << "stopping.....\n";
+    scheduledTimer.stop(true);
+
+}
 /**
  * Test_Microservice app-name host port handler-prefix get-returned-string
  *                      1       2    3       4                  5
@@ -157,8 +195,8 @@ int main(int argc, char *argv[])
     
   // testCache();
 
-    
-  runNewMS();
+    test_timers();
+  //runNewMS();
   
   if (argc < 6)
   {