Create queue producers in pipeline phase (#8643)

server/middleware/src/queue.ts

@@ -34,7 +34,7 @@ export class QueueMiddleware extends BaseMiddleware {
     readonly queue: PlatformQueue
   ) {
     super(context, next)
-    this.txProducer = queue.createProducer<Tx>(ctx, QueueTopic.Tx)
+    this.txProducer = queue.getProducer<Tx>(ctx, QueueTopic.Tx)
   }
 
   static create (queue: PlatformQueue): MiddlewareCreator {
@@ -53,8 +53,4 @@ export class QueueMiddleware extends BaseMiddleware {
       this.txProducer.send(this.context.workspace.uuid, ctx.contextData.broadcast.txes)
     ])
   }
-
-  async close (): Promise<void> {
-    await this.txProducer.close()
-  }
 }