Change the way we push, now it's only periodic

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/trunk@2098 b32b6428-25c9-4566-ad07-03861ab6144f

devices/loggers/warp10/xaal/warp10/dev.py

@@ -9,6 +9,8 @@ import logging
 PACKAGE_NAME = "xaal.warp10"
 logger = logging.getLogger(PACKAGE_NAME)
 
+# period between two push
+PUSH_RATE = 60 
 DATA_BUF = ''
 
 class WARP10Logger:
@@ -27,9 +29,12 @@ class WARP10Logger:
         dev.info       = "%s@%s" % (PACKAGE_NAME,platform.node())
         self.eng.add_device(dev)
         self.http = urllib3.PoolManager()
+        self.eng.add_timer(self.push,PUSH_RATE)
 
     def push(self):
         global DATA_BUF
+        if len(DATA_BUF)==0:
+            return
         try:
             rsp = self.http.request('POST', self.cfg['url'],headers={'X-Warp10-Token':self.cfg['token']},body=DATA_BUF,retries=2)
         except Exception:
@@ -53,7 +58,6 @@ class WARP10Logger:
                 if value != None:
                     buf = buf +"%s// %s%s %s\n" % (now,name,tags,value)
             DATA_BUF = DATA_BUF + buf
-            self.push()
 
 def setup(engine):
     WARP10Logger(engine)