agent/agent.go

package main

import (
	"loafle.com/overflow/agent_api/config_manager"
	msg "loafle.com/overflow/agent_api/messages"
	col "loafle.com/overflow/collector_go"
	cfg "loafle.com/overflow/config_manager_go"
	crm "loafle.com/overflow/crawler_manager_go"
	dat "loafle.com/overflow/data_sender_go"
	evt "loafle.com/overflow/event_sender_go"
	pol "loafle.com/overflow/long_poller_go"
	log "github.com/cihub/seelog"
	"sync"
	"loafle.com/overflow/agent/bootstrap"
)

const (
	// /home/geek/develop/gopath/src/loafle.com/overflow/config_manager_go/test_agent
	PATH = "/home/insanity/Develop/gopath/src/loafle.com/overflow/config_manager_go/test_agent"
)

var wg sync.WaitGroup

func main() {
	wg.Add(1)
	go StartAgent()
	wg.Wait()
}

type Agent struct {
	cm     config_manager.ConfigManager
	taskCh chan interface{}
}

func StartAgent() {
	stopch := make(chan bool, 1)
	bootstrap.HandleShell(stopch)
	bootstrap.HandleSignal(stopch)

	agt := Agent{}
	agt.startAgent()

	agt.handleAgentStop(stopch)
}

func (agt *Agent) startAgent() {
	//1. cfg start()
	cfgStarted := make(chan *config_manager.GlobalConfig, 1)
	if err := cfg.Start(cfgStarted, PATH); err != nil {
		log.Error(err)
		return
	}
	globalConf := <-cfgStarted

	//2. evt start()
	evtStarted := make(chan bool, 1)
	if err := evt.Start(evtStarted); err != nil {
		log.Error(err)
		return
	}
	<-evtStarted

	//3. dat start()
	datStarted := make(chan bool, 1)
	dat.Start(datStarted, globalConf)
	<-datStarted

	//4. pol start()
	polStarted := make(chan bool, 1)
	if err := pol.Start(polStarted, globalConf); err != nil {
		log.Error(err)
		return
	}
	<-polStarted
	agt.taskCh = pol.GetTaskCh()

	/**
		Todo : Getting an auth key from API server.
	 */

	//5. scm start()
	scmStarted := make(chan config_manager.ConfigManager, 1)
	if err := cfg.StartSensorConfig(scmStarted, "temp"); err != nil {
		log.Error(err)
		return
	}
	agt.cm = <-scmStarted

	//6. crm start()
	crmStarted := make(chan bool, 1)
	crm.Start(crmStarted, agt.cm)
	<-crmStarted

	//7. col start()
	dataCh := make(chan interface{})
	colStarted := make(chan bool, 1)
	col.Start(colStarted, dataCh, agt.cm)
	<-colStarted

	//8.evt result
	res := msg.Event{msg.EVT_TYPE_NONE, msg.AGT_START, nil}
	evt.AddEventData(res)

	go agt.processCollectingData(dataCh)
	go agt.waitAgentTask()
}

func (agt *Agent) handleAgentStop(ch chan bool) {
	go func() {
		if <-ch {
			agt.stopAgent()
			log.Info("Agent has stopped.")
			log.Flush()
			close(ch)
			wg.Done()
		}
	}()
}

func (agt *Agent) waitAgentTask() {
	for {
		d := <-agt.taskCh
		task := d.(msg.AgentTask)
		switch task.Command {
		case msg.TASK_POLLER_INTERVAL_UPDATE:
			agt.processUpdatePolInterval(task)
			break
		case msg.TASK_SENSOR_START:
			agt.processStartSensor(task)
			break
		case msg.TASK_SENSOR_STOP:
			agt.processStopSensor(task)
			break
		case msg.TASK_SENSOR_ADD:
			agt.processAddSensor(task)
			break
		case msg.TASK_SENSOR_REMOVE:
			agt.processRemoveSensor(task)
			break
		case msg.TASK_SENSOR_UPDATE:
			agt.processUpdateSensor(task)
			break
		case msg.TASK_AGENT_UPDATE:
			agt.processUpdateAgent(task)
			break
		case msg.TASK_CRAWLER_UPDATE:
			agt.processUpdateCRM(task)
			break
		case msg.TASK_LOG_SEND:
			agt.processSendLog(task)
			break
		default:

		}
	}
}

func (agt *Agent) processCollectingData(ch chan interface{}) {
	for {
		data := <-ch
		dat.AddData(data)
	}
}

func (agt *Agent) stopAgent() {
	//col stop()
	colStopped := make(chan bool, 1)
	col.Stop(colStopped)
	<-colStopped

	//crm stop()
	crmStopped := make(chan bool, 1)
	crm.Stop(crmStopped)
	<-crmStopped

	//cfg stop()
	cfgStopped := make(chan bool, 1)
	cfg.Stop(cfgStopped)
	<-cfgStopped

	//dat stop()
	datStopped := make(chan bool, 1)
	dat.Stop(datStopped)
	<-datStopped

	//pol stop()
	polStopped := make(chan bool, 1)
	if err := pol.Stop(polStopped); err != nil {
		return
	}
	<-polStopped

	evt.AddEventData(msg.Event{msg.EVT_TYPE_NONE, msg.AGT_STOP, nil})
	evt.Stop()

}

func (agt *Agent) processStartSensor(task msg.AgentTask) {
	id := task.Params["sensorId"]
	if err := col.StartSensor(id); err != nil {
		log.Error(err)
		return
	}

	evt.AddEventData(msg.Event{msg.EVT_TYPE_TASK, task.Params["id"], nil})
}

func (agt *Agent) processStopSensor(task msg.AgentTask) {
	id := task.Params["sensorId"]
	if err := col.StopSensor(id); err != nil {
		log.Error(err)
		return
	}
	evt.AddEventData(msg.Event{msg.EVT_TYPE_TASK, task.Params["id"], nil})
}

func (agt *Agent) processAddSensor(task msg.AgentTask) {
	path := task.Params["path"]
	id := task.Params["id"]
	cfg.AddSensor(path)
	crm.AddSensor(id)
	err := col.AddSensor(id)
	if err != nil {
		return
	}
	evt.AddEventData(msg.Event{msg.EVT_TYPE_TASK, task.Params["id"], nil})
}

func (agt *Agent) processRemoveSensor(task msg.AgentTask) {
	id := task.Params["sensorId"]
	err := col.RemSensor(id)
	if err != nil {
		log.Error(err)
		return
	}
	crm.RemoveSensor(id)
	cfg.RemoveSensor(id)
	evt.AddEventData(msg.Event{msg.EVT_TYPE_TASK, task.Params["id"], nil})
}

func (agt *Agent) processUpdateSensor(task msg.AgentTask) {
	path := task.Params["path"]
	id := task.Params["id"]
	if err := col.StopSensor(id); err != nil {
		log.Error(err)
		return
	}
	cfg.UpdateSensor(path)
	crm.UpdateSensor(id)
	if err := col.UpdateSensor(id); err != nil {
		log.Error(err)
		return
	}
	evt.AddEventData(msg.Event{msg.EVT_TYPE_TASK, task.Params["id"], nil})
}

func (agt *Agent) processUpdateCRM(task msg.AgentTask) {
	//(loop)col stopSensor()
	//crm updateCRM()
	//(loop)col startSensor()
	evt.AddEventData(msg.Event{msg.EVT_TYPE_TASK, task.Params["id"], nil})
}

func (agt *Agent) processUpdateAgent(task msg.AgentTask) {
	//Todo. Updating agent
	evt.AddEventData(msg.Event{msg.EVT_TYPE_TASK, task.Params["id"], nil})
}

func (agt *Agent) processSendLog(task msg.AgentTask) {
	//Todo. Sending logs
	evt.AddEventData(msg.Event{msg.EVT_TYPE_TASK, task.Params["id"], nil})
}

func (agt *Agent) processUpdatePolInterval(task msg.AgentTask) {
	interval := task.Params["interval"]
	err := pol.UpdateInterval(interval)
	if err != nil {
		log.Error(err)
		return
	}
	evt.AddEventData(msg.Event{msg.EVT_TYPE_TASK, task.Params["id"], nil})
}