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polling_profile_resource.go
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/
polling_profile_resource.go
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package pollingprofile
import (
"context"
"database/sql"
"encoding/json"
"errors"
"fmt"
"math"
"time"
"github.com/kubeshop/tracetest/server/pkg/id"
"github.com/kubeshop/tracetest/server/resourcemanager"
)
type Strategy string
const (
Periodic Strategy = "periodic"
)
const (
ResourceName = "PollingProfile"
ResourceNamePlural = "PollingProfiles"
)
var Operations = []resourcemanager.Operation{
resourcemanager.OperationGet,
resourcemanager.OperationUpdate,
}
var DefaultPollingProfile = PollingProfile{
ID: id.ID("current"),
Name: "default",
Default: true,
Strategy: Periodic,
Periodic: &PeriodicPollingConfig{
Timeout: "1m",
RetryDelay: "5s",
},
}
type PollingProfile struct {
ID id.ID `mapstructure:"id"`
Name string `mapstructure:"name"`
Default bool `mapstructure:"default"`
Strategy Strategy `mapstructure:"strategy"`
Periodic *PeriodicPollingConfig `mapstructure:"periodic"`
}
type PeriodicPollingConfig struct {
RetryDelay string `mapstructure:"retryDelay"`
Timeout string `mapstructure:"timeout"`
}
func (ppc *PeriodicPollingConfig) TimeoutDuration() time.Duration {
d, _ := time.ParseDuration(ppc.Timeout)
return d
}
func (ppc *PeriodicPollingConfig) RetryDelayDuration() time.Duration {
d, _ := time.ParseDuration(ppc.RetryDelay)
return d
}
func (ppc *PeriodicPollingConfig) MaxTracePollRetry() int {
return int(math.Ceil(float64(ppc.TimeoutDuration()) / float64(ppc.RetryDelayDuration())))
}
func (ppc *PeriodicPollingConfig) Validate() error {
if ppc == nil {
return fmt.Errorf("missing periodic polling profile configuration")
}
if _, err := time.ParseDuration(ppc.RetryDelay); err != nil {
return fmt.Errorf("retry delay configuration is invalid: %w", err)
}
if _, err := time.ParseDuration(ppc.Timeout); err != nil {
return fmt.Errorf("timeout configuration is invalid: %w", err)
}
return nil
}
func (pp PollingProfile) HasID() bool {
return pp.ID.String() != ""
}
func (pp PollingProfile) Validate() error {
if pp.Strategy == Periodic {
if err := pp.Periodic.Validate(); err != nil {
return err
}
}
return nil
}
func NewRepository(db *sql.DB) *Repository {
return &Repository{db}
}
type Repository struct {
db *sql.DB
}
func (r *Repository) SetID(profile PollingProfile, id id.ID) PollingProfile {
profile.ID = id
return profile
}
const (
insertQuery = `
INSERT INTO polling_profiles(
"id",
"name",
"default",
"strategy",
"periodic"
)
VALUES ($1, $2, $3, $4, $5)`
deleteQuery = `DELETE FROM polling_profiles`
)
func (r *Repository) Update(ctx context.Context, updated PollingProfile) (PollingProfile, error) {
// enforce ID and default
updated.ID = "current"
updated.Default = true
tx, err := r.db.BeginTx(ctx, nil)
defer tx.Rollback()
if err != nil {
return PollingProfile{}, err
}
_, err = tx.ExecContext(ctx, deleteQuery)
if err != nil {
return PollingProfile{}, fmt.Errorf("sql exec delete: %w", err)
}
var periodicJSON []byte
if updated.Periodic != nil {
periodicJSON, err = json.Marshal(updated.Periodic)
if err != nil {
return PollingProfile{}, fmt.Errorf("could not marshal periodic strategy configuration: %w", err)
}
}
_, err = tx.ExecContext(ctx, insertQuery,
updated.ID,
updated.Name,
updated.Default,
updated.Strategy,
periodicJSON,
)
if err != nil {
return PollingProfile{}, fmt.Errorf("sql exec insert: %w", err)
}
err = tx.Commit()
if err != nil {
return PollingProfile{}, fmt.Errorf("commit: %w", err)
}
return updated, nil
}
const (
getQuery = `
SELECT
"name",
"strategy",
"periodic"
FROM polling_profiles `
)
func (r *Repository) GetDefault(ctx context.Context) PollingProfile {
pp, _ := r.Get(ctx, id.ID("current"))
return pp
}
func (r *Repository) Get(ctx context.Context, id id.ID) (PollingProfile, error) {
profile := PollingProfile{
ID: "current",
Default: true,
}
var periodicJSON []byte
err := r.db.
QueryRowContext(ctx, getQuery).
Scan(
&profile.Name,
&profile.Strategy,
&periodicJSON,
)
if err != nil {
if errors.Is(err, sql.ErrNoRows) {
return DefaultPollingProfile, nil
}
return PollingProfile{}, fmt.Errorf("sql query: %w", err)
}
if string(periodicJSON) != "null" {
var periodicConfig PeriodicPollingConfig
err = json.Unmarshal(periodicJSON, &periodicConfig)
if err != nil {
return PollingProfile{}, fmt.Errorf("could not unmarshal periodic strategy config: %w", err)
}
profile.Periodic = &periodicConfig
}
return profile, nil
}
func (r *Repository) Provision(ctx context.Context, profile PollingProfile) error {
_, err := r.Update(ctx, profile)
return err
}