Golang Json.Get方法代碼示例

func (*InfluxdbQueryParser) parseTags(model *simplejson.Json) ([]*Tag, error) {
	var result []*Tag
	for _, t := range model.Get("tags").MustArray() {
		tagJson := simplejson.NewFromAny(t)
		tag := &Tag{}
		var err error

		tag.Key, err = tagJson.Get("key").String()
		if err != nil {
			return nil, err
		}

		tag.Value, err = tagJson.Get("value").String()
		if err != nil {
			return nil, err
		}

		operator, err := tagJson.Get("operator").String()
		if err == nil {
			tag.Operator = operator
		}

		condition, err := tagJson.Get("condition").String()
		if err == nil {
			tag.Condition = condition
		}

		result = append(result, tag)
	}

	return result, nil
}

func (*InfluxdbQueryParser) parseQueryPart(model *simplejson.Json) (*QueryPart, error) {
	typ, err := model.Get("type").String()
	if err != nil {
		return nil, err
	}

	var params []string
	for _, paramObj := range model.Get("params").MustArray() {
		param := simplejson.NewFromAny(paramObj)

		stringParam, err := param.String()
		if err == nil {
			params = append(params, stringParam)
			continue
		}

		intParam, err := param.Int()
		if err == nil {
			params = append(params, strconv.Itoa(intParam))
			continue
		}

		return nil, err

	}

	qp, err := NewQueryPart(typ, params)
	if err != nil {
		return nil, err
	}

	return qp, nil
}

func findPanelQueryByRefId(panel *simplejson.Json, refId string) *simplejson.Json {
	for _, targetsObj := range panel.Get("targets").MustArray() {
		target := simplejson.NewFromAny(targetsObj)

		if target.Get("refId").MustString() == refId {
			return target
		}
	}
	return nil
}

func addGettingStartedPanelToHomeDashboard(dash *simplejson.Json) {
	rows := dash.Get("rows").MustArray()
	row := simplejson.NewFromAny(rows[0])

	newpanel := simplejson.NewFromAny(map[string]interface{}{
		"type": "gettingstarted",
		"id":   123123,
		"span": 12,
	})

	panels := row.Get("panels").MustArray()
	panels = append(panels, newpanel)
	row.Set("panels", panels)
}

func newThresholdEvaluator(typ string, model *simplejson.Json) (*ThresholdEvaluator, error) {
	params := model.Get("params").MustArray()
	if len(params) == 0 {
		return nil, alerting.ValidationError{Reason: "Evaluator missing threshold parameter"}
	}

	firstParam, ok := params[0].(json.Number)
	if !ok {
		return nil, alerting.ValidationError{Reason: "Evaluator has invalid parameter"}
	}

	defaultEval := &ThresholdEvaluator{Type: typ}
	defaultEval.Threshold, _ = firstParam.Float64()
	return defaultEval, nil
}

func (qp *InfluxdbQueryParser) parseGroupBy(model *simplejson.Json) ([]*QueryPart, error) {
	var result []*QueryPart

	for _, groupObj := range model.Get("groupBy").MustArray() {
		groupJson := simplejson.NewFromAny(groupObj)
		queryPart, err := qp.parseQueryPart(groupJson)

		if err != nil {
			return nil, err
		}
		result = append(result, queryPart)
	}

	return result, nil
}

func (qp *InfluxdbQueryParser) Parse(model *simplejson.Json, dsInfo *tsdb.DataSourceInfo) (*Query, error) {
	policy := model.Get("policy").MustString("default")
	rawQuery := model.Get("query").MustString("")
	interval := model.Get("interval").MustString("")

	measurement := model.Get("measurement").MustString("")

	resultFormat, err := model.Get("resultFormat").String()
	if err != nil {
		return nil, err
	}

	tags, err := qp.parseTags(model)
	if err != nil {
		return nil, err
	}

	groupBys, err := qp.parseGroupBy(model)
	if err != nil {
		return nil, err
	}

	selects, err := qp.parseSelects(model)
	if err != nil {
		return nil, err
	}

	if interval == "" {
		dsInterval := dsInfo.JsonData.Get("timeInterval").MustString("")
		if dsInterval != "" {
			interval = dsInterval
		}
	}

	return &Query{
		Measurement:  measurement,
		Policy:       policy,
		ResultFormat: resultFormat,
		GroupBy:      groupBys,
		Tags:         tags,
		Selects:      selects,
		RawQuery:     rawQuery,
		Interval:     interval,
	}, nil
}

func NewAlertEvaluator(model *simplejson.Json) (AlertEvaluator, error) {
	typ := model.Get("type").MustString()
	if typ == "" {
		return nil, alerting.ValidationError{Reason: "Evaluator missing type property"}
	}

	if inSlice(typ, defaultTypes) {
		return newThresholdEvaluator(typ, model)
	}

	if inSlice(typ, rangedTypes) {
		return newRangedEvaluator(typ, model)
	}

	if typ == "no_value" {
		return &NoValueEvaluator{}, nil
	}

	return nil, alerting.ValidationError{Reason: "Evaluator invalid evaluator type: " + typ}
}

func newRangedEvaluator(typ string, model *simplejson.Json) (*RangedEvaluator, error) {
	params := model.Get("params").MustArray()
	if len(params) == 0 {
		return nil, alerting.ValidationError{Reason: "Evaluator missing threshold parameter"}
	}

	firstParam, ok := params[0].(json.Number)
	if !ok {
		return nil, alerting.ValidationError{Reason: "Evaluator has invalid parameter"}
	}

	secondParam, ok := params[1].(json.Number)
	if !ok {
		return nil, alerting.ValidationError{Reason: "Evaluator has invalid second parameter"}
	}

	rangedEval := &RangedEvaluator{Type: typ}
	rangedEval.Lower, _ = firstParam.Float64()
	rangedEval.Upper, _ = secondParam.Float64()
	return rangedEval, nil
}

func NewQueryCondition(model *simplejson.Json, index int) (*QueryCondition, error) {
	condition := QueryCondition{}
	condition.Index = index
	condition.HandleRequest = tsdb.HandleRequest

	queryJson := model.Get("query")

	condition.Query.Model = queryJson.Get("model")
	condition.Query.From = queryJson.Get("params").MustArray()[1].(string)
	condition.Query.To = queryJson.Get("params").MustArray()[2].(string)

	if err := validateFromValue(condition.Query.From); err != nil {
		return nil, err
	}

	if err := validateToValue(condition.Query.To); err != nil {
		return nil, err
	}

	condition.Query.DatasourceId = queryJson.Get("datasourceId").MustInt64()

	reducerJson := model.Get("reducer")
	condition.Reducer = NewSimpleReducer(reducerJson.Get("type").MustString())

	evaluatorJson := model.Get("evaluator")
	evaluator, err := NewAlertEvaluator(evaluatorJson)
	if err != nil {
		return nil, err
	}

	condition.Evaluator = evaluator
	return &condition, nil
}

func (qp *InfluxdbQueryParser) parseSelects(model *simplejson.Json) ([]*Select, error) {
	var result []*Select

	for _, selectObj := range model.Get("select").MustArray() {
		selectJson := simplejson.NewFromAny(selectObj)
		var parts Select

		for _, partObj := range selectJson.MustArray() {
			part := simplejson.NewFromAny(partObj)
			queryPart, err := qp.parseQueryPart(part)
			if err != nil {
				return nil, err
			}

			parts = append(parts, *queryPart)
		}

		result = append(result, &parts)
	}

	return result, nil
}

func (qp *InfluxdbQueryParser) Parse(model *simplejson.Json) (*Query, error) {
	policy := model.Get("policy").MustString("default")
	rawQuery := model.Get("query").MustString("")

	measurement := model.Get("measurement").MustString("")

	resultFormat, err := model.Get("resultFormat").String()
	if err != nil {
		return nil, err
	}

	tags, err := qp.parseTags(model)
	if err != nil {
		return nil, err
	}

	groupBys, err := qp.parseGroupBy(model)
	if err != nil {
		return nil, err
	}

	selects, err := qp.parseSelects(model)
	if err != nil {
		return nil, err
	}

	return &Query{
		Measurement:  measurement,
		Policy:       policy,
		ResultFormat: resultFormat,
		GroupBy:      groupBys,
		Tags:         tags,
		Selects:      selects,
		RawQuery:     rawQuery,
	}, nil
}

func (qp *QueryParser) Parse(model *simplejson.Json, dsInfo *models.DataSource, queryContext *tsdb.QueryContext) (*Query, error) {
	query := &Query{TimeRange: queryContext.TimeRange}
	query.AddClusterToAlias = model.Get("addClusterToAlias").MustBool(false)
	query.AddHostToAlias = model.Get("addHostToAlias").MustBool(false)
	query.UseRawQuery = model.Get("rawQuery").MustBool(false)
	query.RawQuery = model.Get("query").MustString("")

	query.Cluster = model.Get("cluster").MustStringArray([]string{})
	query.Hosts = model.Get("hosts").MustStringArray([]string{})

	var metrics []Metric
	var err error
	for _, metricsObj := range model.Get("metrics").MustArray() {
		metricJson := simplejson.NewFromAny(metricsObj)
		var m Metric

		m.Alias = metricJson.Get("alias").MustString("")
		m.Metric, err = metricJson.Get("metric").String()
		if err != nil {
			return nil, err
		}

		metrics = append(metrics, m)
	}

	query.Metrics = metrics

	var functions []Function
	for _, functionListObj := range model.Get("functionList").MustArray() {
		functionListJson := simplejson.NewFromAny(functionListObj)
		var f Function

		f.Func = functionListJson.Get("func").MustString("")
		if err != nil {
			return nil, err
		}

		if f.Func != "" {
			functions = append(functions, f)
		}
	}

	query.FunctionList = functions

	return query, nil
}