75 lines
1.9 KiB
Go
75 lines
1.9 KiB
Go
package wait
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import (
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"context"
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"database/sql"
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"fmt"
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"time"
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"github.com/docker/go-connections/nat"
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)
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//ForSQL constructs a new waitForSql strategy for the given driver
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func ForSQL(port nat.Port, driver string, url func(nat.Port) string) *waitForSql {
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return &waitForSql{
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Port: port,
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URL: url,
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Driver: driver,
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startupTimeout: defaultStartupTimeout(),
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PollInterval: defaultPollInterval(),
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}
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}
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type waitForSql struct {
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URL func(port nat.Port) string
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Driver string
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Port nat.Port
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startupTimeout time.Duration
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PollInterval time.Duration
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}
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//Timeout sets the maximum waiting time for the strategy after which it'll give up and return an error
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func (w *waitForSql) Timeout(duration time.Duration) *waitForSql {
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w.startupTimeout = duration
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return w
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}
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//WithPollInterval can be used to override the default polling interval of 100 milliseconds
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func (w *waitForSql) WithPollInterval(pollInterval time.Duration) *waitForSql {
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w.PollInterval = pollInterval
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return w
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}
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//WaitUntilReady repeatedly tries to run "SELECT 1" query on the given port using sql and driver.
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// If the it doesn't succeed until the timeout value which defaults to 60 seconds, it will return an error
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func (w *waitForSql) WaitUntilReady(ctx context.Context, target StrategyTarget) (err error) {
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ctx, cancel := context.WithTimeout(ctx, w.startupTimeout)
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defer cancel()
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ticker := time.NewTicker(w.PollInterval)
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defer ticker.Stop()
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port, err := target.MappedPort(ctx, w.Port)
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if err != nil {
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return fmt.Errorf("target.MappedPort: %v", err)
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}
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db, err := sql.Open(w.Driver, w.URL(port))
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if err != nil {
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return fmt.Errorf("sql.Open: %v", err)
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}
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defer db.Close()
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for {
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select {
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case <-ctx.Done():
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return ctx.Err()
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case <-ticker.C:
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if _, err := db.ExecContext(ctx, "SELECT 1"); err != nil {
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continue
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}
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return nil
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}
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}
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}
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