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|
package wait
import (
"context"
"io"
"time"
tcexec "github.com/testcontainers/testcontainers-go/exec"
)
// Implement interface
var (
_ Strategy = (*ExecStrategy)(nil)
_ StrategyTimeout = (*ExecStrategy)(nil)
)
type ExecStrategy struct {
// all Strategies should have a startupTimeout to avoid waiting infinitely
timeout *time.Duration
cmd []string
// additional properties
ExitCodeMatcher func(exitCode int) bool
ResponseMatcher func(body io.Reader) bool
PollInterval time.Duration
}
// NewExecStrategy constructs an Exec strategy ...
func NewExecStrategy(cmd []string) *ExecStrategy {
return &ExecStrategy{
cmd: cmd,
ExitCodeMatcher: defaultExitCodeMatcher,
ResponseMatcher: func(_ io.Reader) bool { return true },
PollInterval: defaultPollInterval(),
}
}
func defaultExitCodeMatcher(exitCode int) bool {
return exitCode == 0
}
// WithStartupTimeout can be used to change the default startup timeout
func (ws *ExecStrategy) WithStartupTimeout(startupTimeout time.Duration) *ExecStrategy {
ws.timeout = &startupTimeout
return ws
}
func (ws *ExecStrategy) WithExitCode(exitCode int) *ExecStrategy {
return ws.WithExitCodeMatcher(func(actualCode int) bool {
return actualCode == exitCode
})
}
func (ws *ExecStrategy) WithExitCodeMatcher(exitCodeMatcher func(exitCode int) bool) *ExecStrategy {
ws.ExitCodeMatcher = exitCodeMatcher
return ws
}
func (ws *ExecStrategy) WithResponseMatcher(matcher func(body io.Reader) bool) *ExecStrategy {
ws.ResponseMatcher = matcher
return ws
}
// WithPollInterval can be used to override the default polling interval of 100 milliseconds
func (ws *ExecStrategy) WithPollInterval(pollInterval time.Duration) *ExecStrategy {
ws.PollInterval = pollInterval
return ws
}
// ForExec is a convenience method to assign ExecStrategy
func ForExec(cmd []string) *ExecStrategy {
return NewExecStrategy(cmd)
}
func (ws *ExecStrategy) Timeout() *time.Duration {
return ws.timeout
}
func (ws *ExecStrategy) WaitUntilReady(ctx context.Context, target StrategyTarget) error {
timeout := defaultStartupTimeout()
if ws.timeout != nil {
timeout = *ws.timeout
}
ctx, cancel := context.WithTimeout(ctx, timeout)
defer cancel()
for {
select {
case <-ctx.Done():
return ctx.Err()
case <-time.After(ws.PollInterval):
exitCode, resp, err := target.Exec(ctx, ws.cmd, tcexec.Multiplexed())
if err != nil {
return err
}
if !ws.ExitCodeMatcher(exitCode) {
continue
}
if ws.ResponseMatcher != nil && !ws.ResponseMatcher(resp) {
continue
}
return nil
}
}
}
|
