feat(alerting): moved alerting models back to alerting package, models is more for storage dtos

pkg/models/alerts.go

@@ -112,24 +112,3 @@ type GetAlertChangesQuery struct {
 
 	Result []AlertRuleChange
 }
-
-type AlertJob struct {
-	Offset     int64
-	Delay      bool
-	Running    bool
-	RetryCount int
-	Rule       AlertRule
-}
-
-type AlertResult struct {
-	Id          int64
-	State       string
-	ActualValue float64
-	Duration    float64
-	Description string
-	AlertJob    *AlertJob
-}
-
-func (ar *AlertResult) IsResultIncomplete() bool {
-	return ar.State == AlertStatePending
-}

pkg/models/alerts_state.go

@@ -2,6 +2,8 @@ package models
 
 import (
 	"time"
+
+	"github.com/grafana/grafana/pkg/services/alerting/alertstates"
 )
 
 type AlertState struct {
@@ -13,25 +15,8 @@ type AlertState struct {
 	Info     string    `json:"info"`
 }
 
-var (
-	VALID_STATES = []string{
-		AlertStateOk,
-		AlertStateWarn,
-		AlertStateCritical,
-		AlertStateAcknowledged,
-		AlertStateMaintenance,
-	}
-
-	AlertStateOk           = "OK"
-	AlertStateWarn         = "WARN"
-	AlertStateCritical     = "CRITICAL"
-	AlertStateAcknowledged = "ACKNOWLEDGED"
-	AlertStateMaintenance  = "MAINTENANCE"
-	AlertStatePending      = "PENDING"
-)
-
 func (this *UpdateAlertStateCommand) IsValidState() bool {
-	for _, v := range VALID_STATES {
+	for _, v := range alertstates.ValidStates {
 		if this.NewState == v {
 			return true
 		}

pkg/models/timeseries.go

@@ -1,15 +0,0 @@
-package models
-
-type TimeSeries struct {
-	Name   string       `json:"name"`
-	Points [][2]float64 `json:"points"`
-}
-
-type TimeSeriesSlice []*TimeSeries
-
-func NewTimeSeries(name string, points [][2]float64) *TimeSeries {
-	return &TimeSeries{
-		Name:   name,
-		Points: points,
-	}
-}

pkg/services/alerting/alert_rule_reader.go

@@ -10,7 +10,7 @@ import (
 )
 
 type RuleReader interface {
-	Fetch() []m.AlertRule
+	Fetch() []AlertRule
 }
 
 type AlertRuleReader struct {
@@ -28,15 +28,15 @@ func NewRuleReader() *AlertRuleReader {
 }
 
 var (
-	alertJobs []m.AlertRule
+	alertJobs []AlertRule
 )
 
-func (arr *AlertRuleReader) Fetch() []m.AlertRule {
+func (arr *AlertRuleReader) Fetch() []AlertRule {
 	return alertJobs
 }
 
 func (arr *AlertRuleReader) initReader() {
-	alertJobs = make([]m.AlertRule, 0)
+	alertJobs = make([]AlertRule, 0)
 	heartbeat := time.NewTicker(time.Second * 10)
 	arr.updateRules()
 
@@ -56,7 +56,7 @@ func (arr *AlertRuleReader) updateRules() {
 	err := bus.Dispatch(cmd)
 
 	if err == nil {
-		alertJobs = cmd.Result
+		//alertJobs = cmd.Result
 	} else {
 		log.Error(1, "AlertRuleReader: Could not load alerts")
 	}

pkg/services/alerting/alerting.go

@@ -1,9 +1,6 @@
 package alerting
 
 import (
-	"fmt"
-	"time"
-
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/log"
 	m "github.com/grafana/grafana/pkg/models"
@@ -27,111 +24,9 @@ func Init() {
 	go scheduler.dispatch(reader)
 	go scheduler.executor(&ExecutorImpl{})
 	go scheduler.handleResponses()
-
 }
 
-type Scheduler struct {
+func saveState(response *AlertResult) {
-	jobs          map[int64]*m.AlertJob
-	runQueue      chan *m.AlertJob
-	responseQueue chan *m.AlertResult
-
-	alertRuleFetcher RuleReader
-}
-
-func NewScheduler() *Scheduler {
-	return &Scheduler{
-		jobs:          make(map[int64]*m.AlertJob, 0),
-		runQueue:      make(chan *m.AlertJob, 1000),
-		responseQueue: make(chan *m.AlertResult, 1000),
-	}
-}
-
-func (scheduler *Scheduler) dispatch(reader RuleReader) {
-	reschedule := time.NewTicker(time.Second * 10)
-	secondTicker := time.NewTicker(time.Second)
-
-	scheduler.updateJobs(reader.Fetch)
-
-	for {
-		select {
-		case <-secondTicker.C:
-			scheduler.queueJobs()
-		case <-reschedule.C:
-			scheduler.updateJobs(reader.Fetch)
-		}
-	}
-}
-
-func (scheduler *Scheduler) updateJobs(alertRuleFn func() []m.AlertRule) {
-	log.Debug("Scheduler: UpdateJobs()")
-
-	jobs := make(map[int64]*m.AlertJob, 0)
-	rules := alertRuleFn()
-
-	for i, rule := range rules {
-		var job *m.AlertJob
-		if scheduler.jobs[rule.Id] != nil {
-			job = scheduler.jobs[rule.Id]
-		} else {
-			job = &m.AlertJob{
-				Running:    false,
-				RetryCount: 0,
-			}
-		}
-
-		job.Rule = rule
-		job.Offset = int64(i)
-
-		jobs[rule.Id] = job
-	}
-
-	log.Debug("Scheduler: Selected %d jobs", len(jobs))
-	scheduler.jobs = jobs
-}
-
-func (scheduler *Scheduler) queueJobs() {
-	now := time.Now().Unix()
-	for _, job := range scheduler.jobs {
-		if now%job.Rule.Frequency == 0 && job.Running == false {
-			log.Info("Scheduler: Putting job on to run queue: %s", job.Rule.Title)
-			scheduler.runQueue <- job
-		}
-	}
-}
-
-func (scheduler *Scheduler) executor(executor Executor) {
-	for job := range scheduler.runQueue {
-		//log.Info("Executor: queue length %d", len(this.runQueue))
-		log.Info("Executor: executing %s", job.Rule.Title)
-		job.Running = true
-		scheduler.measureAndExecute(executor, job)
-	}
-}
-
-func (scheduler *Scheduler) handleResponses() {
-	for response := range scheduler.responseQueue {
-		log.Info("Response: alert(%d) status(%s) actual(%v) retry(%d)", response.Id, response.State, response.ActualValue, response.AlertJob.RetryCount)
-		response.AlertJob.Running = false
-
-		if response.IsResultIncomplete() {
-			response.AlertJob.RetryCount++
-			if response.AlertJob.RetryCount < maxRetries {
-				scheduler.runQueue <- response.AlertJob
-			} else {
-				saveState(&m.AlertResult{
-					Id:          response.Id,
-					State:       m.AlertStateCritical,
-					Description: fmt.Sprintf("Failed to run check after %d retires", maxRetries),
-				})
-			}
-		} else {
-			response.AlertJob.RetryCount = 0
-			saveState(response)
-		}
-	}
-}
-
-func saveState(response *m.AlertResult) {
 	cmd := &m.UpdateAlertStateCommand{
 		AlertId:  response.Id,
 		NewState: response.State,
@@ -142,24 +37,3 @@ func saveState(response *m.AlertResult) {
 		log.Error(2, "failed to save state %v", err)
 	}
 }
-
-func (scheduler *Scheduler) measureAndExecute(exec Executor, job *m.AlertJob) {
-	now := time.Now()
-
-	responseChan := make(chan *m.AlertResult, 1)
-	go exec.Execute(job, responseChan)
-
-	select {
-	case <-time.After(time.Second * 5):
-		scheduler.responseQueue <- &m.AlertResult{
-			Id:       job.Rule.Id,
-			State:    m.AlertStatePending,
-			Duration: float64(time.Since(now).Nanoseconds()) / float64(1000000),
-			AlertJob: job,
-		}
-	case result := <-responseChan:
-		result.Duration = float64(time.Since(now).Nanoseconds()) / float64(1000000)
-		log.Info("Schedular: exeuction took %vms", result.Duration)
-		scheduler.responseQueue <- result
-	}
-}

pkg/services/alerting/alertstates/states.go

@@ -0,0 +1,18 @@
+package alertstates
+
+var (
+	ValidStates = []string{
+		Ok,
+		Warn,
+		Critical,
+		Acknowledged,
+		Maintenance,
+	}
+
+	Ok           = "OK"
+	Warn         = "WARN"
+	Critical     = "CRITICAL"
+	Acknowledged = "ACKNOWLEDGED"
+	Maintenance  = "MAINTENANCE"
+	Pending      = "PENDING"
+)

pkg/services/alerting/datasources/backends.go

@@ -1,33 +1,3 @@
-package graphite
+package datasources
-
-import (
-	"fmt"
-
-	"github.com/grafana/grafana/pkg/bus"
-	m "github.com/grafana/grafana/pkg/models"
-)
-
-// AlertDatasource is bacon
-type AlertDatasource interface {
-	GetSeries(job *m.AlertJob, datasource m.DataSource) (m.TimeSeriesSlice, error)
-}
 
 // GetSeries returns timeseries data from the datasource
-func GetSeries(job *m.AlertJob) (m.TimeSeriesSlice, error) {
-	query := &m.GetDataSourceByIdQuery{
-		Id:    job.Rule.DatasourceId,
-		OrgId: job.Rule.OrgId,
-	}
-
-	err := bus.Dispatch(query)
-
-	if err != nil {
-		return nil, fmt.Errorf("Could not find datasource for %d", job.Rule.DatasourceId)
-	}
-
-	if query.Result.Type == m.DS_GRAPHITE {
-		return GraphiteClient{}.GetSeries(*job, query.Result)
-	}
-
-	return nil, fmt.Errorf("Grafana does not support alerts for %s", query.Result.Type)
-}

pkg/services/alerting/datasources/graphite.go

@@ -1,80 +1,80 @@
-package graphite
+package datasources
 
-import (
+// import (
-	"bytes"
+// 	"bytes"
-	"encoding/json"
+// 	"encoding/json"
-	"fmt"
+// 	"fmt"
-	"io/ioutil"
+// 	"io/ioutil"
-	"net/http"
+// 	"net/http"
-	"net/url"
+// 	"net/url"
-	"strconv"
+// 	"strconv"
-	"time"
+// 	"time"
-
+//
-	"github.com/grafana/grafana/pkg/components/simplejson"
+// 	"github.com/grafana/grafana/pkg/components/simplejson"
-	"github.com/grafana/grafana/pkg/log"
+// 	"github.com/grafana/grafana/pkg/log"
-	m "github.com/grafana/grafana/pkg/models"
+// 	m "github.com/grafana/grafana/pkg/models"
-	"github.com/grafana/grafana/pkg/util"
+// 	"github.com/grafana/grafana/pkg/util"
-)
+// )
-
+//
-type GraphiteClient struct{}
+// type GraphiteClient struct{}
-
+//
-type GraphiteSerie struct {
+// type GraphiteSerie struct {
-	Datapoints [][2]float64
+// 	Datapoints [][2]float64
-	Target     string
+// 	Target     string
-}
+// }
-
+//
-var DefaultClient = &http.Client{
+// var DefaultClient = &http.Client{
-	Timeout: time.Minute,
+// 	Timeout: time.Minute,
-}
+// }
-
+//
-type GraphiteResponse []GraphiteSerie
+// type GraphiteResponse []GraphiteSerie
-
+//
-func (client GraphiteClient) GetSeries(rule m.AlertJob, datasource m.DataSource) (m.TimeSeriesSlice, error) {
+// func (client GraphiteClient) GetSeries(rule m.AlertJob, datasource m.DataSource) (m.TimeSeriesSlice, error) {
-	v := url.Values{
+// 	v := url.Values{
-		"format": []string{"json"},
+// 		"format": []string{"json"},
-		"target": []string{getTargetFromRule(rule.Rule)},
+// 		"target": []string{getTargetFromRule(rule.Rule)},
-		"until":  []string{"now"},
+// 		"until":  []string{"now"},
-		"from":   []string{"-" + strconv.Itoa(rule.Rule.QueryRange) + "s"},
+// 		"from":   []string{"-" + strconv.Itoa(rule.Rule.QueryRange) + "s"},
-	}
+// 	}
-
+//
-	log.Trace("Graphite: sending request with querystring: ", v.Encode())
+// 	log.Trace("Graphite: sending request with querystring: ", v.Encode())
-
+//
-	req, err := http.NewRequest("POST", datasource.Url+"/render", nil)
+// 	req, err := http.NewRequest("POST", datasource.Url+"/render", nil)
-
+//
-	if err != nil {
+// 	if err != nil {
-		return nil, fmt.Errorf("Could not create request")
+// 		return nil, fmt.Errorf("Could not create request")
-	}
+// 	}
-
+//
-	req.Body = ioutil.NopCloser(bytes.NewReader([]byte(v.Encode())))
+// 	req.Body = ioutil.NopCloser(bytes.NewReader([]byte(v.Encode())))
-
+//
-	if datasource.BasicAuth {
+// 	if datasource.BasicAuth {
-		req.Header.Add("Authorization", util.GetBasicAuthHeader(datasource.User, datasource.Password))
+// 		req.Header.Add("Authorization", util.GetBasicAuthHeader(datasource.User, datasource.Password))
-	}
+// 	}
-
+//
-	res, err := DefaultClient.Do(req)
+// 	res, err := DefaultClient.Do(req)
-
+//
-	if err != nil {
+// 	if err != nil {
-		return nil, err
+// 		return nil, err
-	}
+// 	}
-
+//
-	if res.StatusCode != http.StatusOK {
+// 	if res.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("expected httpstatus 200, found %d", res.StatusCode)
+// 		return nil, fmt.Errorf("expected httpstatus 200, found %d", res.StatusCode)
-	}
+// 	}
-
+//
-	response := GraphiteResponse{}
+// 	response := GraphiteResponse{}
-
+//
-	json.NewDecoder(res.Body).Decode(&response)
+// 	json.NewDecoder(res.Body).Decode(&response)
-
+//
-	var timeSeries []*m.TimeSeries
+// 	var timeSeries []*m.TimeSeries
-	for _, v := range response {
+// 	for _, v := range response {
-		timeSeries = append(timeSeries, m.NewTimeSeries(v.Target, v.Datapoints))
+// 		timeSeries = append(timeSeries, m.NewTimeSeries(v.Target, v.Datapoints))
-	}
+// 	}
-
+//
-	return timeSeries, nil
+// 	return timeSeries, nil
-}
+// }
-
+//
-func getTargetFromRule(rule m.AlertRule) string {
+// func getTargetFromRule(rule m.AlertRule) string {
-	json, _ := simplejson.NewJson([]byte(rule.Query))
+// 	json, _ := simplejson.NewJson([]byte(rule.Query))
-
+//
-	return json.Get("target").MustString()
+// 	return json.Get("target").MustString()
-}
+// }

pkg/services/alerting/engine.go

@@ -0,0 +1 @@
+package alerting

pkg/services/alerting/executor.go

@@ -5,13 +5,15 @@ import (
 
 	"math"
 
+	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/log"
 	m "github.com/grafana/grafana/pkg/models"
-	b "github.com/grafana/grafana/pkg/services/alerting/datasources"
+	"github.com/grafana/grafana/pkg/services/alerting/alertstates"
+	"github.com/grafana/grafana/pkg/tsdb"
 )
 
 type Executor interface {
-	Execute(rule *m.AlertJob, responseQueue chan *m.AlertResult)
+	Execute(rule *AlertJob, responseQueue chan *AlertResult)
 }
 
 var (
@@ -22,7 +24,7 @@ var (
 type ExecutorImpl struct{}
 
 type compareFn func(float64, float64) bool
-type aggregationFn func(*m.TimeSeries) float64
+type aggregationFn func(*tsdb.TimeSeries) float64
 
 var operators = map[string]compareFn{
 	">":  func(num1, num2 float64) bool { return num1 > num2 },
@@ -32,7 +34,7 @@ var operators = map[string]compareFn{
 	"":   func(num1, num2 float64) bool { return false },
 }
 var aggregator = map[string]aggregationFn{
-	"avg": func(series *m.TimeSeries) float64 {
+	"avg": func(series *tsdb.TimeSeries) float64 {
 		sum := float64(0)
 
 		for _, v := range series.Points {
@@ -41,7 +43,7 @@ var aggregator = map[string]aggregationFn{
 
 		return sum / float64(len(series.Points))
 	},
-	"sum": func(series *m.TimeSeries) float64 {
+	"sum": func(series *tsdb.TimeSeries) float64 {
 		sum := float64(0)
 
 		for _, v := range series.Points {
@@ -50,7 +52,7 @@ var aggregator = map[string]aggregationFn{
 
 		return sum
 	},
-	"min": func(series *m.TimeSeries) float64 {
+	"min": func(series *tsdb.TimeSeries) float64 {
 		min := series.Points[0][0]
 
 		for _, v := range series.Points {
@@ -61,7 +63,7 @@ var aggregator = map[string]aggregationFn{
 
 		return min
 	},
-	"max": func(series *m.TimeSeries) float64 {
+	"max": func(series *tsdb.TimeSeries) float64 {
 		max := series.Points[0][0]
 
 		for _, v := range series.Points {
@@ -72,17 +74,17 @@ var aggregator = map[string]aggregationFn{
 
 		return max
 	},
-	"mean": func(series *m.TimeSeries) float64 {
+	"mean": func(series *tsdb.TimeSeries) float64 {
 		midPosition := int64(math.Floor(float64(len(series.Points)) / float64(2)))
 		return series.Points[midPosition][0]
 	},
 }
 
-func (executor *ExecutorImpl) Execute(job *m.AlertJob, responseQueue chan *m.AlertResult) {
+func (executor *ExecutorImpl) Execute(job *AlertJob, responseQueue chan *AlertResult) {
-	response, err := b.GetSeries(job)
+	response, err := executor.GetSeries(job)
 
 	if err != nil {
-		responseQueue <- &m.AlertResult{State: m.AlertStatePending, Id: job.Rule.Id, AlertJob: job}
+		responseQueue <- &AlertResult{State: alertstates.Pending, Id: job.Rule.Id, AlertJob: job}
 	}
 
 	result := executor.validateRule(job.Rule, response)
@@ -90,7 +92,26 @@ func (executor *ExecutorImpl) Execute(job *m.AlertJob, responseQueue chan *m.Ale
 	responseQueue <- result
 }
 
-func (executor *ExecutorImpl) validateRule(rule m.AlertRule, series m.TimeSeriesSlice) *m.AlertResult {
+func (executor *ExecutorImpl) GetSeries(job *AlertJob) (tsdb.TimeSeriesSlice, error) {
+	query := &m.GetDataSourceByIdQuery{
+		Id:    job.Rule.DatasourceId,
+		OrgId: job.Rule.OrgId,
+	}
+
+	err := bus.Dispatch(query)
+
+	if err != nil {
+		return nil, fmt.Errorf("Could not find datasource for %d", job.Rule.DatasourceId)
+	}
+
+	// if query.Result.Type == m.DS_GRAPHITE {
+	// 	return GraphiteClient{}.GetSeries(*job, query.Result)
+	// }
+
+	return nil, fmt.Errorf("Grafana does not support alerts for %s", query.Result.Type)
+}
+
+func (executor *ExecutorImpl) validateRule(rule AlertRule, series tsdb.TimeSeriesSlice) *AlertResult {
 	for _, serie := range series {
 		if aggregator[rule.Aggregator] == nil {
 			continue
@@ -102,8 +123,8 @@ func (executor *ExecutorImpl) validateRule(rule m.AlertRule, series m.TimeSeries
 
 		log.Trace(resultLogFmt, "Crit", serie.Name, aggValue, rule.CritOperator, rule.CritLevel, critResult)
 		if critResult {
-			return &m.AlertResult{
+			return &AlertResult{
-				State:       m.AlertStateCritical,
+				State:       alertstates.Critical,
 				Id:          rule.Id,
 				ActualValue: aggValue,
 				Description: fmt.Sprintf(descriptionFmt, aggValue, serie.Name),
@@ -114,8 +135,8 @@ func (executor *ExecutorImpl) validateRule(rule m.AlertRule, series m.TimeSeries
 		var warnResult = warnOperartor(aggValue, rule.CritLevel)
 		log.Trace(resultLogFmt, "Warn", serie.Name, aggValue, rule.WarnOperator, rule.WarnLevel, warnResult)
 		if warnResult {
-			return &m.AlertResult{
+			return &AlertResult{
-				State:       m.AlertStateWarn,
+				State:       alertstates.Warn,
 				Id:          rule.Id,
 				Description: fmt.Sprintf(descriptionFmt, aggValue, serie.Name),
 				ActualValue: aggValue,
@@ -123,5 +144,5 @@ func (executor *ExecutorImpl) validateRule(rule m.AlertRule, series m.TimeSeries
 		}
 	}
 
-	return &m.AlertResult{State: m.AlertStateOk, Id: rule.Id, Description: "Alert is OK!"}
+	return &AlertResult{State: alertstates.Ok, Id: rule.Id, Description: "Alert is OK!"}
 }

pkg/services/alerting/models.go

@@ -0,0 +1,43 @@
+package alerting
+
+import "github.com/grafana/grafana/pkg/services/alerting/alertstates"
+
+type AlertJob struct {
+	Offset     int64
+	Delay      bool
+	Running    bool
+	RetryCount int
+	Rule       AlertRule
+}
+
+type AlertResult struct {
+	Id          int64
+	State       string
+	ActualValue float64
+	Duration    float64
+	Description string
+	AlertJob    *AlertJob
+}
+
+func (ar *AlertResult) IsResultIncomplete() bool {
+	return ar.State == alertstates.Pending
+}
+
+type AlertRule struct {
+	Id           int64
+	OrgId        int64
+	DatasourceId int64
+	DashboardId  int64
+	PanelId      int64
+	Query        string
+	QueryRefId   string
+	WarnLevel    float64
+	CritLevel    float64
+	WarnOperator string
+	CritOperator string
+	Frequency    int64
+	Title        string
+	Description  string
+	QueryRange   int
+	Aggregator   string
+}

pkg/services/alerting/scheduler.go

@@ -0,0 +1,129 @@
+package alerting
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/Unknwon/log"
+	"github.com/grafana/grafana/pkg/services/alerting/alertstates"
+)
+
+type Scheduler struct {
+	jobs          map[int64]*AlertJob
+	runQueue      chan *AlertJob
+	responseQueue chan *AlertResult
+}
+
+func NewScheduler() *Scheduler {
+	return &Scheduler{
+		jobs:          make(map[int64]*AlertJob, 0),
+		runQueue:      make(chan *AlertJob, 1000),
+		responseQueue: make(chan *AlertResult, 1000),
+	}
+}
+
+func (scheduler *Scheduler) dispatch(reader RuleReader) {
+	reschedule := time.NewTicker(time.Second * 10)
+	secondTicker := time.NewTicker(time.Second)
+
+	scheduler.updateJobs(reader.Fetch)
+
+	for {
+		select {
+		case <-secondTicker.C:
+			scheduler.queueJobs()
+		case <-reschedule.C:
+			scheduler.updateJobs(reader.Fetch)
+		}
+	}
+}
+
+func (scheduler *Scheduler) updateJobs(alertRuleFn func() []AlertRule) {
+	log.Debug("Scheduler: UpdateJobs()")
+
+	jobs := make(map[int64]*AlertJob, 0)
+	rules := alertRuleFn()
+
+	for i, rule := range rules {
+		var job *AlertJob
+		if scheduler.jobs[rule.Id] != nil {
+			job = scheduler.jobs[rule.Id]
+		} else {
+			job = &AlertJob{
+				Running:    false,
+				RetryCount: 0,
+			}
+		}
+
+		job.Rule = rule
+		job.Offset = int64(i)
+
+		jobs[rule.Id] = job
+	}
+
+	log.Debug("Scheduler: Selected %d jobs", len(jobs))
+	scheduler.jobs = jobs
+}
+
+func (scheduler *Scheduler) queueJobs() {
+	now := time.Now().Unix()
+	for _, job := range scheduler.jobs {
+		if now%job.Rule.Frequency == 0 && job.Running == false {
+			log.Info("Scheduler: Putting job on to run queue: %s", job.Rule.Title)
+			scheduler.runQueue <- job
+		}
+	}
+}
+
+func (scheduler *Scheduler) executor(executor Executor) {
+	for job := range scheduler.runQueue {
+		//log.Info("Executor: queue length %d", len(this.runQueue))
+		log.Info("Executor: executing %s", job.Rule.Title)
+		job.Running = true
+		scheduler.measureAndExecute(executor, job)
+	}
+}
+
+func (scheduler *Scheduler) handleResponses() {
+	for response := range scheduler.responseQueue {
+		log.Info("Response: alert(%d) status(%s) actual(%v) retry(%d)", response.Id, response.State, response.ActualValue, response.AlertJob.RetryCount)
+		response.AlertJob.Running = false
+
+		if response.IsResultIncomplete() {
+			response.AlertJob.RetryCount++
+			if response.AlertJob.RetryCount < maxRetries {
+				scheduler.runQueue <- response.AlertJob
+			} else {
+				saveState(&AlertResult{
+					Id:          response.Id,
+					State:       alertstates.Critical,
+					Description: fmt.Sprintf("Failed to run check after %d retires", maxRetries),
+				})
+			}
+		} else {
+			response.AlertJob.RetryCount = 0
+			saveState(response)
+		}
+	}
+}
+
+func (scheduler *Scheduler) measureAndExecute(exec Executor, job *AlertJob) {
+	now := time.Now()
+
+	responseChan := make(chan *AlertResult, 1)
+	go exec.Execute(job, responseChan)
+
+	select {
+	case <-time.After(time.Second * 5):
+		scheduler.responseQueue <- &AlertResult{
+			Id:       job.Rule.Id,
+			State:    alertstates.Pending,
+			Duration: float64(time.Since(now).Nanoseconds()) / float64(1000000),
+			AlertJob: job,
+		}
+	case result := <-responseChan:
+		result.Duration = float64(time.Since(now).Nanoseconds()) / float64(1000000)
+		log.Info("Schedular: exeuction took %vms", result.Duration)
+		scheduler.responseQueue <- result
+	}
+}

pkg/tsdb/batch.go

@@ -0,0 +1,90 @@
+package tsdb
+
+import "errors"
+
+type Batch struct {
+	DataSourceId int64
+	Queries      QuerySlice
+	Depends      map[string]bool
+	Done         bool
+	Started      bool
+}
+
+type BatchSlice []*Batch
+
+func newBatch(dsId int64, queries QuerySlice) *Batch {
+	return &Batch{
+		DataSourceId: dsId,
+		Queries:      queries,
+		Depends:      make(map[string]bool),
+	}
+}
+
+func (bg *Batch) process(context *QueryContext) {
+	executor := getExecutorFor(bg.Queries[0].DataSource)
+
+	if executor == nil {
+		bg.Done = true
+		result := &BatchResult{
+			Error:        errors.New("Could not find executor for data source type " + bg.Queries[0].DataSource.Type),
+			QueryResults: make(map[string]*QueryResult),
+		}
+		for _, query := range bg.Queries {
+			result.QueryResults[query.RefId] = &QueryResult{Error: result.Error}
+		}
+		context.ResultsChan <- result
+		return
+	}
+
+	res := executor.Execute(bg.Queries, context)
+	bg.Done = true
+	context.ResultsChan <- res
+}
+
+func (bg *Batch) addQuery(query *Query) {
+	bg.Queries = append(bg.Queries, query)
+}
+
+func (bg *Batch) allDependenciesAreIn(context *QueryContext) bool {
+	for key := range bg.Depends {
+		if _, exists := context.Results[key]; !exists {
+			return false
+		}
+	}
+
+	return true
+}
+
+func getBatches(req *Request) (BatchSlice, error) {
+	batches := make(BatchSlice, 0)
+
+	for _, query := range req.Queries {
+		if foundBatch := findMatchingBatchGroup(query, batches); foundBatch != nil {
+			foundBatch.addQuery(query)
+		} else {
+			newBatch := newBatch(query.DataSource.Id, QuerySlice{query})
+			batches = append(batches, newBatch)
+
+			for _, refId := range query.Depends {
+				for _, batch := range batches {
+					for _, batchQuery := range batch.Queries {
+						if batchQuery.RefId == refId {
+							newBatch.Depends[refId] = true
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return batches, nil
+}
+
+func findMatchingBatchGroup(query *Query, batches BatchSlice) *Batch {
+	for _, batch := range batches {
+		if batch.DataSourceId == query.DataSource.Id {
+			return batch
+		}
+	}
+	return nil
+}

pkg/tsdb/executor.go

@@ -0,0 +1,24 @@
+package tsdb
+
+type Executor interface {
+	Execute(queries QuerySlice, context *QueryContext) *BatchResult
+}
+
+var registry map[string]GetExecutorFn
+
+type GetExecutorFn func(dsInfo *DataSourceInfo) Executor
+
+func init() {
+	registry = make(map[string]GetExecutorFn)
+}
+
+func getExecutorFor(dsInfo *DataSourceInfo) Executor {
+	if fn, exists := registry[dsInfo.Type]; exists {
+		return fn(dsInfo)
+	}
+	return nil
+}
+
+func RegisterExecutor(dsType string, fn GetExecutorFn) {
+	registry[dsType] = fn
+}

pkg/tsdb/models.go

@@ -0,0 +1,62 @@
+package tsdb
+
+import "time"
+
+type TimeRange struct {
+	From time.Time
+	To   time.Time
+}
+
+type Request struct {
+	TimeRange     TimeRange
+	MaxDataPoints int
+	Queries       QuerySlice
+}
+
+type Response struct {
+	BatchTimings []*BatchTiming
+	Results      map[string]*QueryResult
+}
+
+type DataSourceInfo struct {
+	Id                int64
+	Name              string
+	Type              string
+	Url               string
+	Password          string
+	User              string
+	Database          string
+	BasicAuth         bool
+	BasicAuthUser     string
+	BasicAuthPassword string
+}
+
+type BatchTiming struct {
+	TimeElapsed int64
+}
+
+type BatchResult struct {
+	Error        error
+	QueryResults map[string]*QueryResult
+	Timings      *BatchTiming
+}
+
+type QueryResult struct {
+	Error  error
+	RefId  string
+	Series TimeSeriesSlice
+}
+
+type TimeSeries struct {
+	Name   string
+	Points [][2]float64
+}
+
+type TimeSeriesSlice []*TimeSeries
+
+func NewTimeSeries(name string, points [][2]float64) *TimeSeries {
+	return &TimeSeries{
+		Name:   name,
+		Points: points,
+	}
+}

pkg/tsdb/query.go

@@ -0,0 +1,12 @@
+package tsdb
+
+type Query struct {
+	RefId      string
+	Query      string
+	Depends    []string
+	DataSource *DataSourceInfo
+	Results    []*TimeSeries
+	Exclude    bool
+}
+
+type QuerySlice []*Query

pkg/tsdb/query_context.go

@@ -0,0 +1,21 @@
+package tsdb
+
+import "sync"
+
+type QueryContext struct {
+	TimeRange   TimeRange
+	Queries     QuerySlice
+	Results     map[string]*QueryResult
+	ResultsChan chan *BatchResult
+	Lock        sync.RWMutex
+	BatchWaits  sync.WaitGroup
+}
+
+func NewQueryContext(queries QuerySlice, timeRange TimeRange) *QueryContext {
+	return &QueryContext{
+		TimeRange:   timeRange,
+		Queries:     queries,
+		ResultsChan: make(chan *BatchResult),
+		Results:     make(map[string]*QueryResult),
+	}
+}

pkg/tsdb/request.go

@@ -0,0 +1,51 @@
+package tsdb
+
+func HandleRequest(req *Request) (*Response, error) {
+	context := NewQueryContext(req.Queries, req.TimeRange)
+
+	batches, err := getBatches(req)
+	if err != nil {
+		return nil, err
+	}
+
+	currentlyExecuting := 0
+
+	for _, batch := range batches {
+		if len(batch.Depends) == 0 {
+			currentlyExecuting += 1
+			batch.Started = true
+			go batch.process(context)
+		}
+	}
+
+	response := &Response{}
+
+	for currentlyExecuting != 0 {
+		select {
+		case batchResult := <-context.ResultsChan:
+			currentlyExecuting -= 1
+
+			response.BatchTimings = append(response.BatchTimings, batchResult.Timings)
+
+			for refId, result := range batchResult.QueryResults {
+				context.Results[refId] = result
+			}
+
+			for _, batch := range batches {
+				// not interested in started batches
+				if batch.Started {
+					continue
+				}
+
+				if batch.allDependenciesAreIn(context) {
+					currentlyExecuting += 1
+					batch.Started = true
+					go batch.process(context)
+				}
+			}
+		}
+	}
+
+	response.Results = context.Results
+	return response, nil
+}