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metrics.go
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/
metrics.go
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package api
import (
"database/sql"
"fmt"
)
var (
appInstancesPerChannelMetricSQL string = fmt.Sprintf(`
SELECT a.name AS app_name, ia.version AS version, c.name AS channel_name, count(ia.version) AS instances_count
FROM instance_application ia, application a, channel c, groups g
WHERE a.id = ia.application_id AND ia.group_id = g.id AND g.channel_id = c.id AND %s
GROUP BY app_name, version, channel_name
ORDER BY app_name, version, channel_name
`, ignoreFakeInstanceCondition("ia.instance_id"))
failedUpdatesSQL string = fmt.Sprintf(`
SELECT a.name AS app_name, count(*) as fail_count
FROM application a, event e, event_type et
WHERE a.id = e.application_id AND e.event_type_id = et.id AND et.result = 0 AND et.type = 3 AND %s
GROUP BY app_name
ORDER BY app_name
`, ignoreFakeInstanceCondition("e.instance_id"))
)
type AppInstancesPerChannelMetric struct {
ApplicationName string `db:"app_name" json:"app_name"`
Version string `db:"version" json:"version"`
ChannelName string `db:"channel_name" json:"channel_name"`
InstancesCount int `db:"instances_count" json:"instances_count"`
}
func (api *API) GetAppInstancesPerChannelMetrics() ([]AppInstancesPerChannelMetric, error) {
var metrics []AppInstancesPerChannelMetric
rows, err := api.db.Queryx(appInstancesPerChannelMetricSQL)
if err != nil {
return nil, err
}
defer rows.Close()
for rows.Next() {
var metric AppInstancesPerChannelMetric
err := rows.StructScan(&metric)
if err != nil {
return nil, err
}
metrics = append(metrics, metric)
}
if err := rows.Err(); err != nil {
return nil, err
}
return metrics, nil
}
type FailedUpdatesMetric struct {
ApplicationName string `db:"app_name" json:"app_name"`
FailureCount int `db:"fail_count" json:"fail_count"`
}
func (api *API) GetFailedUpdatesMetrics() ([]FailedUpdatesMetric, error) {
var metrics []FailedUpdatesMetric
rows, err := api.db.Queryx(failedUpdatesSQL)
if err != nil {
return nil, err
}
defer rows.Close()
for rows.Next() {
var metric FailedUpdatesMetric
err := rows.StructScan(&metric)
if err != nil {
return nil, err
}
metrics = append(metrics, metric)
}
if err := rows.Err(); err != nil {
return nil, err
}
return metrics, nil
}
func (api *API) DbStats() sql.DBStats {
return api.db.Stats()
}