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package tools
import "fmt"
// Interface for all types of wrapper around a channel of results and an error channel
// Implementors will expose a type-specific channel for results
// Call the Wait() function after processing the results channel to catch any errors
// that occurred during the async processing
type ChannelWrapper interface {
// Call this after processing results channel to check for async errors
Wait() error
}
// Base implementation of channel wrapper to just deal with errors
type BaseChannelWrapper struct {
errorChan <-chan error
}
func (w *BaseChannelWrapper) Wait() error {
var err error
for e := range w.errorChan {
if err != nil {
// Combine in case multiple errors
err = fmt.Errorf("%v\n%v", err, e)
} else {
err = e
}
}
return err
}
func NewBaseChannelWrapper(errChan <-chan error) *BaseChannelWrapper {
return &BaseChannelWrapper{errorChan: errChan}
}
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