/
executor.go
76 lines (65 loc) · 1.41 KB
/
executor.go
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package workflows
import (
"errors"
"github.com/stelligent/mu/common"
)
// Executor define contract for the steps of a workflow
type Executor func() error
// Conditional define contract for the conditional predicate
type Conditional func() bool
func newPipelineExecutor(executors ...Executor) Executor {
return func() error {
for _, executor := range executors {
err := executor()
if err != nil {
switch err.(type) {
case common.Warning:
log.Warning(err.Error())
return nil
default:
log.Errorf("%v", err)
log.Debugf("%+v", err)
return errors.New("")
}
}
}
return nil
}
}
func newConditionalExecutor(conditional Conditional, trueExecutor Executor, falseExecutor Executor) Executor {
return func() error {
if conditional() == true {
if trueExecutor != nil {
return trueExecutor()
}
} else {
if falseExecutor != nil {
return falseExecutor()
}
}
return nil
}
}
func executeWithChan(executor Executor, errChan chan error) {
errChan <- executor()
}
func newErrorExecutor(err error) Executor {
return func() error {
return err
}
}
func newParallelExecutor(executors ...Executor) Executor {
return func() error {
errChan := make(chan error)
for _, executor := range executors {
go executeWithChan(executor, errChan)
}
for i := 0; i < len(executors); i++ {
err := <-errChan
if err != nil {
return err
}
}
return nil
}
}