From fe782cb8acfb62d45bacf81a83024ce578e7ead8 Mon Sep 17 00:00:00 2001
From: Ethan Buchman <ethan@coinculture.info>
Date: Sun, 29 Nov 2015 03:44:08 -0500
Subject: [PATCH] server: allow multiple connections

---
 example/counter.go |  2 --
 server/server.go   | 16 +++++++++++++---
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/example/counter.go b/example/counter.go
index f52997323..1962cd91f 100644
--- a/example/counter.go
+++ b/example/counter.go
@@ -2,7 +2,6 @@ package example
 
 import (
 	"encoding/binary"
-	"fmt"
 
 	. "github.com/tendermint/go-common"
 	"github.com/tendermint/tmsp/types"
@@ -40,7 +39,6 @@ func (dapp *CounterApplication) AppendTx(tx []byte) ([]types.Event, types.RetCod
 }
 
 func (dapp *CounterApplication) GetHash() ([]byte, types.RetCode) {
-	fmt.Println("getting hash!")
 	hash := make([]byte, 32)
 	binary.PutVarint(hash, int64(dapp.hashCount))
 	dapp.hashCount += 1
diff --git a/server/server.go b/server/server.go
index f7e187381..075e3e66c 100644
--- a/server/server.go
+++ b/server/server.go
@@ -11,6 +11,8 @@ import (
 	"github.com/tendermint/tmsp/types"
 )
 
+var maxNumberConnections = 2
+
 func StartListener(protoAddr string, app types.Application) (net.Listener, error) {
 	parts := strings.SplitN(protoAddr, "://", 2)
 	proto, addr := parts[0], parts[1]
@@ -22,7 +24,11 @@ func StartListener(protoAddr string, app types.Application) (net.Listener, error
 	// A goroutine to accept a connection.
 	go func() {
 
+		semaphore := make(chan struct{}, maxNumberConnections)
+
 		for {
+			semaphore <- struct{}{}
+
 			// Accept a connection
 			conn, err := ln.Accept()
 			if err != nil {
@@ -38,9 +44,13 @@ func StartListener(protoAddr string, app types.Application) (net.Listener, error
 			// Pull responses from 'responses' and write them to conn.
 			go handleResponses(connClosed, responses, conn)
 
-			// Wait until connection is closed
-			<-connClosed
-			fmt.Println("Connection was closed. Waiting for new connection...")
+			go func() {
+				// Wait until connection is closed
+				<-connClosed
+				fmt.Println("Connection was closed. Waiting for new connection...")
+
+				<-semaphore
+			}()
 		}
 
 	}()