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retryexecutor.go
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retryexecutor.go
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package utils
import (
"fmt"
"time"
"github.com/tenstad/jfrog-client-go/utils/log"
)
type ExecutionHandlerFunc func() (bool, error)
type RetryExecutor struct {
// The amount of retries to perform.
MaxRetries int
// Number of milliseconds to sleep between retries.
RetriesIntervalMilliSecs int
// Message to display when retrying.
ErrorMessage string
// Prefix to print at the beginning of each log.
LogMsgPrefix string
// ExecutionHandler is the operation to run with retries.
ExecutionHandler ExecutionHandlerFunc
}
func (runner *RetryExecutor) Execute() error {
var err error
var shouldRetry bool
for i := 0; i <= runner.MaxRetries; i++ {
// Run ExecutionHandler
shouldRetry, err = runner.ExecutionHandler()
// If should not retry, return
if !shouldRetry {
return err
}
// Print retry log message
runner.LogRetry(i, err)
// Going to sleep for RetryInterval milliseconds
if runner.RetriesIntervalMilliSecs > 0 && i < runner.MaxRetries {
time.Sleep(time.Millisecond * time.Duration(runner.RetriesIntervalMilliSecs))
}
}
log.Info(fmt.Sprintf("%s executor timeout after %v attempts with %v milliseconds wait intervals", runner.LogMsgPrefix, runner.MaxRetries, runner.RetriesIntervalMilliSecs))
return err
}
func (runner *RetryExecutor) LogRetry(attemptNumber int, err error) {
message := fmt.Sprintf("%s(Attempt %v)", runner.LogMsgPrefix, attemptNumber+1)
if runner.ErrorMessage != "" {
message = fmt.Sprintf("%s - %s", message, runner.ErrorMessage)
}
if err != nil {
message = fmt.Sprintf("%s: %s", message, err.Error())
}
if err != nil || runner.ErrorMessage != "" {
log.Warn(message)
} else {
log.Debug(message)
}
}