/
response_writer.go
153 lines (133 loc) · 3.47 KB
/
response_writer.go
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package asyncp
import (
"context"
)
type responseWriterRelseasePool interface {
// Release response writer object
Release(w ResponseWriter)
}
// ResponseWriter basic response functionality
type ResponseWriter interface {
// WriteResonse sends data into the stream response
WriteResonse(response interface{}) error
// RepeatWithResponse send data into the same stream response
RepeatWithResponse(response interface{}) error
// Release response writer stream
Release() error
}
// ResponseHandlerFnk provides implementation of ResponseWriter interface
type ResponseHandlerFnk func(response interface{}) error
// WriteResonse sends data into the stream response
func (f ResponseHandlerFnk) WriteResonse(response interface{}) error {
return f(response)
}
// RepeatWithResponse send data into the same stream response
func (f ResponseHandlerFnk) RepeatWithResponse(response interface{}) error {
return f(response)
}
// Release response writer stream empty method
func (f ResponseHandlerFnk) Release() error {
return nil
}
type responseProxyWriter struct {
event Event
promise Promise
mux *TaskMux
pool responseWriterRelseasePool
}
func (wr *responseProxyWriter) WriteResonse(value interface{}) error {
var (
errs multiError
events = wr.promise.TargetEventName()
)
for _, eventName := range events {
errs.Add(wr.writeResonseWithEventName(eventName, value, false))
}
if len(events) == 0 {
errs.Add(wr.writeResonseWithEventName("", value, false))
}
return errs.AsError()
}
func (wr *responseProxyWriter) RepeatWithResponse(value interface{}) error {
return wr.writeResonseWithEventName(wr.promise.EventName(), value, true)
}
func (wr *responseProxyWriter) writeResonseWithEventName(name string, value interface{}, repeat bool) error {
var ev Event
switch v := value.(type) {
case Event:
ev = v
default:
ev = wr.event.WithPayload(value)
}
if name != "" || !repeat {
ev = ev.WithName(name)
}
if repeat {
ev = ev.Repeat(wr.event)
} else {
ev = ev.After(wr.event)
}
ev.SetMux(wr.mux)
return wr.mux.ExecuteEvent(ev)
}
func (wr *responseProxyWriter) Release() error {
if wr.pool != nil {
wr.pool.Release(wr)
}
return nil
}
type responseStreamWriter struct {
ctx context.Context
event Event
promise Promise
wstream Publisher
pool responseWriterRelseasePool
mux *TaskMux
}
func (wr *responseStreamWriter) WriteResonse(value interface{}) error {
var (
errs multiError
events = wr.promise.TargetEventName()
)
for _, eventName := range events {
errs.Add(wr.writeResonseWithEventName(eventName, value, false))
}
if len(events) == 0 {
errs.Add(wr.writeResonseWithEventName("", value, false))
}
return errs.AsError()
}
func (wr *responseStreamWriter) RepeatWithResponse(value interface{}) error {
return wr.writeResonseWithEventName(wr.promise.EventName(), value, true)
}
func (wr *responseStreamWriter) writeResonseWithEventName(name string, value interface{}, repeat bool) error {
var ev Event
switch v := value.(type) {
case Event:
ev = v
default:
ev = wr.event.WithPayload(value)
}
if name != "" || !repeat {
ev = ev.WithName(name)
}
if repeat {
ev = ev.Repeat(wr.event)
} else {
ev = ev.After(wr.event)
}
ev.SetMux(wr.mux)
return wr.wstream.Publish(wr.getExecContext(), ev)
}
func (wr *responseStreamWriter) Release() error {
if wr.pool != nil {
wr.pool.Release(wr)
}
return nil
}
func (wr *responseStreamWriter) getExecContext() context.Context {
if wr.ctx != nil {
return wr.ctx
}
return context.Background()
}