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op_map.go
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op_map.go
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package mono
import (
"context"
"sync"
"github.com/jjeffcaii/reactor-go"
"github.com/pkg/errors"
)
var _mapSubscriberPool = sync.Pool{
New: func() interface{} {
return new(mapSubscriber)
},
}
type mapSubscriber struct {
actual reactor.Subscriber
t reactor.Transformer
}
type monoMap struct {
source reactor.RawPublisher
mapper reactor.Transformer
}
func (m monoMap) Parent() reactor.RawPublisher {
return m.source
}
func newMonoMap(source reactor.RawPublisher, tf reactor.Transformer) monoMap {
return monoMap{
source: source,
mapper: tf,
}
}
func borrowMapSubscriber(s reactor.Subscriber, t reactor.Transformer) *mapSubscriber {
sub := _mapSubscriberPool.Get().(*mapSubscriber)
sub.actual = s
sub.t = t
return sub
}
func returnMapSubscriber(s *mapSubscriber) {
if s == nil {
return
}
s.actual = nil
s.t = nil
_mapSubscriberPool.Put(s)
}
func (m *mapSubscriber) OnComplete() {
if m == nil || m.actual == nil || m.t == nil {
return
}
defer returnMapSubscriber(m)
m.actual.OnComplete()
}
func (m *mapSubscriber) OnError(err error) {
if m == nil || m.actual == nil || m.t == nil {
return
}
defer returnMapSubscriber(m)
m.actual.OnError(err)
}
func (m *mapSubscriber) OnNext(v Any) {
if m == nil || m.actual == nil || m.t == nil {
// TODO:
return
}
defer func() {
rec := recover()
if rec == nil {
return
}
if e, ok := rec.(error); ok {
m.actual.OnError(errors.WithStack(e))
} else {
m.actual.OnError(errors.Errorf("%v", rec))
}
}()
if transformed, err := m.t(v); err != nil {
m.actual.OnError(err)
} else {
m.actual.OnNext(transformed)
}
}
func (m *mapSubscriber) OnSubscribe(ctx context.Context, s reactor.Subscription) {
if m == nil || m.actual == nil || m.t == nil {
return
}
m.actual.OnSubscribe(ctx, s)
}
func (m monoMap) SubscribeWith(ctx context.Context, s reactor.Subscriber) {
m.source.SubscribeWith(ctx, borrowMapSubscriber(s, m.mapper))
}