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contextMessageDelegate.go
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contextMessageDelegate.go
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package internal
import (
"sync"
"sync/atomic"
redis "github.com/Bofry/lib-redis-stream"
)
var _ redis.MessageDelegate = new(ContextMessageDelegate)
type ContextMessageDelegate struct {
parent redis.MessageDelegate
ctx *Context
messageObserver MessageObserver
restricted int32
mu sync.Mutex
}
func NewContextMessageDelegate(ctx *Context) *ContextMessageDelegate {
return &ContextMessageDelegate{
ctx: ctx,
}
}
// OnAck implements redis.MessageDelegate.
func (d *ContextMessageDelegate) OnAck(msg *redis.Message) {
if d.isRestricted() {
GlobalRestrictedMessageDelegate.OnAck(nil)
return
}
d.parent.OnAck(msg)
GlobalContextHelper.InjectReplyCode(d.ctx, PASS)
// observer
if d.messageObserver != nil {
d.messageObserver.OnAck(d.ctx, msg)
}
}
// OnDel implements redis.MessageDelegate.
func (d *ContextMessageDelegate) OnDel(msg *redis.Message) {
if d.isRestricted() {
GlobalRestrictedMessageDelegate.OnDel(nil)
return
}
d.parent.OnDel(msg)
// observer
if d.messageObserver != nil {
d.messageObserver.OnDel(d.ctx, msg)
}
}
func (d *ContextMessageDelegate) configure(msg *redis.Message) {
if d.parent == nil {
d.mu.Lock()
defer d.mu.Unlock()
if d.parent == nil {
d.parent = msg.Delegate
msg.Delegate = d
}
}
}
func (d *ContextMessageDelegate) isRestricted() bool {
return atomic.LoadInt32(&d.restricted) == 1
}
func (d *ContextMessageDelegate) restrict() {
atomic.StoreInt32(&d.restricted, 1)
}
func (d *ContextMessageDelegate) unrestrict() {
atomic.StoreInt32(&d.restricted, 0)
}
func (d *ContextMessageDelegate) registerMessageObservers(observers []MessageObserver) {
d.messageObserver = CompositeMessageObserver(observers)
}
func (d *ContextMessageDelegate) unregisterAllMessageObservers() {
d.messageObserver = nil
}