Producer Consumer Part

Like serverAccpet, create routine for consumer if there is available
consumer.

concurrency/producer_consumer/common.go

@@ -15,7 +15,7 @@ const (
 	TimeoutDial        = 5 * time.Second
 	TimeoutShutdown    = 5 * time.Second
 
-	ProcessDuration = 2 * time.Second
+	ProcessDuration = 3 * time.Second
 )
 
 var (

concurrency/producer_consumer/producer.go

@@ -54,6 +54,7 @@ func (p *Producer) schedule() {
 			// one consumer consumes one job at one time
 			consumer := <-p.consumers
 
+			go func(consumer string) {
 				// if rpcCall fails, this consumer will be regarded as unavailable.
 				err := rpcCall(consumer, "Consumer.DoTask", task, &struct{}{})
 				if err != nil {
@@ -67,6 +68,7 @@ func (p *Producer) schedule() {
 						}
 					}(consumer)
 				}
+			}(consumer)
 		case <-p.done:
 			break
 		}