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|
package wait
import (
"context"
"database/sql"
"fmt"
"time"
"github.com/docker/go-connections/nat"
)
var (
_ Strategy = (*waitForSQL)(nil)
_ StrategyTimeout = (*waitForSQL)(nil)
)
const defaultForSQLQuery = "SELECT 1"
// ForSQL constructs a new waitForSql strategy for the given driver
func ForSQL(port nat.Port, driver string, url func(host string, port nat.Port) string) *waitForSQL {
return &waitForSQL{
Port: port,
URL: url,
Driver: driver,
startupTimeout: defaultStartupTimeout(),
PollInterval: defaultPollInterval(),
query: defaultForSQLQuery,
}
}
type waitForSQL struct {
timeout *time.Duration
URL func(host string, port nat.Port) string
Driver string
Port nat.Port
startupTimeout time.Duration
PollInterval time.Duration
query string
}
// WithStartupTimeout can be used to change the default startup timeout
func (w *waitForSQL) WithStartupTimeout(timeout time.Duration) *waitForSQL {
w.timeout = &timeout
return w
}
// WithPollInterval can be used to override the default polling interval of 100 milliseconds
func (w *waitForSQL) WithPollInterval(pollInterval time.Duration) *waitForSQL {
w.PollInterval = pollInterval
return w
}
// WithQuery can be used to override the default query used in the strategy.
func (w *waitForSQL) WithQuery(query string) *waitForSQL {
w.query = query
return w
}
func (w *waitForSQL) Timeout() *time.Duration {
return w.timeout
}
// WaitUntilReady repeatedly tries to run "SELECT 1" or user defined query on the given port using sql and driver.
//
// If it doesn't succeed until the timeout value which defaults to 60 seconds, it will return an error.
func (w *waitForSQL) WaitUntilReady(ctx context.Context, target StrategyTarget) error {
timeout := defaultStartupTimeout()
if w.timeout != nil {
timeout = *w.timeout
}
ctx, cancel := context.WithTimeout(ctx, timeout)
defer cancel()
host, err := target.Host(ctx)
if err != nil {
return err
}
ticker := time.NewTicker(w.PollInterval)
defer ticker.Stop()
var port nat.Port
port, err = target.MappedPort(ctx, w.Port)
for port == "" {
select {
case <-ctx.Done():
return fmt.Errorf("%w: %w", ctx.Err(), err)
case <-ticker.C:
if err := checkTarget(ctx, target); err != nil {
return err
}
port, err = target.MappedPort(ctx, w.Port)
}
}
db, err := sql.Open(w.Driver, w.URL(host, port))
if err != nil {
return fmt.Errorf("sql.Open: %w", err)
}
defer db.Close()
for {
select {
case <-ctx.Done():
return ctx.Err()
case <-ticker.C:
if err := checkTarget(ctx, target); err != nil {
return err
}
if _, err := db.ExecContext(ctx, w.query); err != nil {
continue
}
return nil
}
}
}
|
