96 lines
1.9 KiB
Go
96 lines
1.9 KiB
Go
package workflow
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import (
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"k8s.io/klog/v2"
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)
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// RunData is a interface represents all of runDatas abstract object.
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type RunData = interface{}
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// Job represents a executable workflow, it has list of tasks.
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// these tasks must be execution order. if one of these tasks throws
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// error, the entire job will fail. During the workflow,if there are
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// some artifacts, we can store it to runData.
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type Job struct {
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Tasks []Task
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runData RunData
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runDataInitializer func() (RunData, error)
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}
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// NewJob return a Job with task array.
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func NewJob() *Job {
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return &Job{
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Tasks: []Task{},
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}
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}
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// AppendTask append a task to job, a job has a list of task.
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func (j *Job) AppendTask(t Task) {
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j.Tasks = append(j.Tasks, t)
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}
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func (j *Job) initData() (RunData, error) {
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if j.runData == nil && j.runDataInitializer != nil {
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var err error
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if j.runData, err = j.runDataInitializer(); err != nil {
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klog.ErrorS(err, "failed to initialize running data")
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return nil, err
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}
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}
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return j.runData, nil
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}
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// SetDataInitializer set a initialize runData function to job.
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func (j *Job) SetDataInitializer(build func() (RunData, error)) {
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j.runDataInitializer = build
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}
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// Run start execte job workflow. if the task has sub task, it will
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// recursive call the sub tasks util all of task be completed or error be thrown.
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func (j *Job) Run() error {
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runData := j.runData
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if runData == nil {
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if _, err := j.initData(); err != nil {
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return err
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}
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}
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for _, t := range j.Tasks {
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if err := run(t, j.runData); err != nil {
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return err
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}
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}
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return nil
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}
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func run(t Task, data RunData) error {
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if t.Skip != nil {
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skip, err := t.Skip(data)
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if err != nil {
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return err
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}
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if skip {
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return nil
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}
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}
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if t.Run != nil {
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if err := t.Run(data); err != nil {
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return err
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}
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if t.RunSubTasks {
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for _, p := range t.Tasks {
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if err := run(p, data); err != nil {
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return err
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}
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}
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}
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}
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return nil
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}
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