/
pubsub.go
50 lines (49 loc) · 1.82 KB
/
pubsub.go
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package gql
import "github.com/pjmd89/gogql/lib/http"
var PubSub = &SourceEvents{
subscriptionEvents: make(map[OperationID] chan interface{},0),
operationEvents: make(map[OperationID] map[EventID]*Subscription,0),
};
// se ejecuta en el momento levantar el esquema, 1 por cada subscripcion existente en el esquema
func(o *SourceEvents) createSubscriptionEvent(operationID OperationID){
o.subscriptionEvents[operationID] = make(chan interface{});
go o.listenSubscriptionEvent(operationID)
}
//se ejecuta en el momento de crear una subscripcion cuando llega la peticion desde websocket
func(o *SourceEvents) createExcecuteEvent(eventId EventID, operationId OperationID, socketId SocketID, requestID RequestID, mt int){
if o.operationEvents[operationId] == nil{
o.operationEvents[operationId] = make(map[EventID]*Subscription,0);
}
o.operationEvents[operationId][eventId] = &Subscription{
eventID: eventId,
operationID: operationId,
socketID: socketId,
requestID: requestID,
messageType: mt,
channel: make(chan bool),
};
}
func(o *SourceEvents) listenExcecuteEvent(operationID OperationID, eventID EventID) interface{}{
select{
case <-o.operationEvents[operationID][eventID].channel:
return o.operationEvents[operationID][eventID].value;
case <- http.WsIds[string(o.operationEvents[operationID][eventID].socketID)]:
close(o.operationEvents[operationID][eventID].channel);
delete(o.operationEvents[operationID], eventID);
return &SubscriptionClose{};
}
}
func(o *SourceEvents) listenSubscriptionEvent(operationID OperationID){
for{
r := <-o.subscriptionEvents[operationID];
if len(o.operationEvents) >0{
for _,v := range o.operationEvents[operationID]{
v.value = r;
v.channel <- true;
}
}
}
}
func(o *SourceEvents)Publish( operationID OperationID, value interface{}){
o.subscriptionEvents[operationID] <- value;
}