add threading.Lock for cherrypy, or performance suffer.

@@ -368,7 +368,8 @@ class RESTServers(object):
         self.__nodes = []
         
         self.__last_update = datetime.datetime.now();
-        server_ip = "192.168.1.142";
+        
+        self.__lock = threading.Lock()
         
     def __get_node(self, device_id):
         for node in self.__nodes:
@@ -416,6 +417,9 @@ class RESTServers(object):
     def POST(self):
         enable_crossdomain()
         
+        try:
+            self.__lock.acquire()
+
             req = cherrypy.request.body.read()
             trace("post to nodes, req=%s"%(req))
             try:
@@ -437,6 +441,8 @@ class RESTServers(object):
             node.heartbeat = time.time()
             
             return json.dumps({"code":Error.success, "data": {"id":node.id}})
+        finally:
+            self.__lock.release()
     
     '''
     id canbe:
@@ -455,6 +461,9 @@ class RESTServers(object):
     def GET(self, id=None, action="play", stream="live/livestream", index=None, local="false", device_id=None):
         enable_crossdomain()
         
+        try:
+            self.__lock.acquire()
+        
             self.__refresh_nodes()
             data = self.__json_dump_nodes(self.__nodes)
             
@@ -507,6 +516,8 @@ class RESTServers(object):
                 return json.dumps(data)
             #return "id=%s, action=%s, stream=%s, url=%s, index=%s, local=%s"%(id, action, stream, url, index, local)
             raise cherrypy.HTTPRedirect(url)
+        finally:
+            self.__lock.release()
 
     def DELETE(self, id):
         enable_crossdomain()
@@ -577,6 +588,10 @@ class RESTNodes(object):
     
     def __init__(self):
         self.__nodes = []
+        # @remark, if there is shared data, such as the self.__nodes,
+        # we must use lock for cherrypy, or the cpu of cherrypy will high
+        # and performance suffer.
+        self.__lock = threading.Lock()
         
     def __get_node(self, id):
         for node in self.__nodes:
@@ -629,6 +644,9 @@ class RESTNodes(object):
     def GET(self, type=None, format=None, origin=None, vhost=None, port=None, stream=None, node_id=None):
         enable_crossdomain()
         
+        try:
+            self.__lock.acquire()
+        
             self.__refresh_nodes()
             data = self.__json_dump_nodes(self.__nodes)
             
@@ -671,10 +689,15 @@ class RESTNodes(object):
                     }})
             
             return json.dumps({"code":Error.success, "data": data})
+        finally:
+            self.__lock.release()
 
     def PUT(self):
         enable_crossdomain()
         
+        try:
+            self.__lock.acquire()
+
             req = cherrypy.request.body.read()
             trace("put to nodes, req=%s"%(req))
             try:
@@ -708,10 +731,15 @@ class RESTNodes(object):
             res = json.dumps({"code":Error.success, "data": {"id":node.id, "peers":peers_data}})
             trace(res)
             return res
+        finally:
+            self.__lock.release()
 
     def POST(self):
         enable_crossdomain()
         
+        try:
+            self.__lock.acquire()
+
             req = cherrypy.request.body.read()
             trace("post to nodes, req=%s"%(req))
             try:
@@ -736,6 +764,8 @@ class RESTNodes(object):
             res = json.dumps({"code":Error.success, "data": {"id":node.id, "peers":peers_data}})
             trace(res)
             return res
+        finally:
+            self.__lock.release()
         
     def OPTIONS(self, *args, **kwargs):
         enable_crossdomain()
@@ -966,7 +996,8 @@ conf = {
         'server.socket_port': port,
         'tools.encode.on': True,
         'tools.staticdir.on': True,
-        'tools.encode.encoding': "utf-8"
+        'tools.encode.encoding': "utf-8",
+        'server.thread_pool': 2, # single thread server.
     },
     '/': {
         'tools.staticdir.dir': static_dir,