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package ephemeral
import (
"context"
"sync/atomic"
"time"
json "github.com/json-iterator/go"
"github.com/spiral/roadrunner/v2/plugins/jobs/job"
"github.com/spiral/roadrunner/v2/utils"
)
type Item struct {
// Job contains name of job broker (usually PHP class).
Job string `json:"job"`
// Ident is unique identifier of the job, should be provided from outside
Ident string `json:"id"`
// Payload is string data (usually JSON) passed to Job broker.
Payload string `json:"payload"`
// Headers with key-values pairs
Headers map[string][]string `json:"headers"`
// Options contains set of PipelineOptions specific to job execution. Can be empty.
Options *Options `json:"options,omitempty"`
}
// Options carry information about how to handle given job.
type Options struct {
// Priority is job priority, default - 10
// pointer to distinguish 0 as a priority and nil as priority not set
Priority int64 `json:"priority"`
// Pipeline manually specified pipeline.
Pipeline string `json:"pipeline,omitempty"`
// Delay defines time duration to delay execution for. Defaults to none.
Delay int64 `json:"delay,omitempty"`
// private
requeueFn func(context.Context, *Item) error
active *int64
delayed *int64
}
// DelayDuration returns delay duration in a form of time.Duration.
func (o *Options) DelayDuration() time.Duration {
return time.Second * time.Duration(o.Delay)
}
func (i *Item) ID() string {
return i.Ident
}
func (i *Item) Priority() int64 {
return i.Options.Priority
}
// Body packs job payload into binary payload.
func (i *Item) Body() []byte {
return utils.AsBytes(i.Payload)
}
// Context packs job context (job, id) into binary payload.
func (i *Item) Context() ([]byte, error) {
ctx, err := json.Marshal(
struct {
ID string `json:"id"`
Job string `json:"job"`
Headers map[string][]string `json:"headers"`
Pipeline string `json:"pipeline"`
}{ID: i.Ident, Job: i.Job, Headers: i.Headers, Pipeline: i.Options.Pipeline},
)
if err != nil {
return nil, err
}
return ctx, nil
}
func (i *Item) Ack() error {
i.atomicallyReduceCount()
return nil
}
func (i *Item) Nack() error {
i.atomicallyReduceCount()
return nil
}
func (i *Item) Requeue(headers map[string][]string, delay int64) error {
// overwrite the delay
i.Options.Delay = delay
i.Headers = headers
i.atomicallyReduceCount()
err := i.Options.requeueFn(context.Background(), i)
if err != nil {
return err
}
return nil
}
// atomicallyReduceCount reduces counter of active or delayed jobs
func (i *Item) atomicallyReduceCount() {
// if job was delayed, reduce number of the delayed jobs
if i.Options.Delay > 0 {
atomic.AddInt64(i.Options.delayed, ^int64(0))
return
}
// otherwise, reduce number of the active jobs
atomic.AddInt64(i.Options.active, ^int64(0))
// noop for the in-memory
}
func fromJob(job *job.Job) *Item {
return &Item{
Job: job.Job,
Ident: job.Ident,
Payload: job.Payload,
Options: &Options{
Priority: job.Options.Priority,
Pipeline: job.Options.Pipeline,
Delay: job.Options.Delay,
},
}
}
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