pool/list: using grequests to get units data

setup.py

@@ -18,5 +18,6 @@
         "pytz>=2015.4",
         "Pygments>=2.0.2",
         "tsuruclient>=0.2.1",
+        "grequests>=0.2.0",
     ],
 )

tsuru_dashboard/admin/tests/test_pool_list_view.py

@@ -61,7 +61,8 @@ def test_should_pass_addresses_to_the_template(self, token_is_valid):
 
         for addr in ["http://128.0.0.1:4243", "http://myserver.com:2375", "http://127.0.0.1:2375"]:
             url = "{}/docker/node/{}/containers".format(settings.TSURU_HOST, addr)
-            body = json.dumps([{"Status": "started"}, {"Status": "stopped"}])
+            body = json.dumps(
+                [{"Status": "started", "HostAddr": addr}, {"Status": "stopped", "HostAddr": addr}])
             httpretty.register_uri(httpretty.GET, url, body=body, status=200)
 
         response = PoolList.as_view()(self.request)

tsuru_dashboard/admin/views.py

@@ -1,4 +1,5 @@
 import requests
+import grequests
 import json
 import re
 from dateutil import parser
@@ -23,15 +24,24 @@
 class PoolList(LoginRequiredView, TemplateView):
     template_name = "admin/pool_list.html"
 
-    def units_by_node(self, address):
-        url = "{}/docker/node/{}/containers".format(settings.TSURU_HOST, address)
-        response = requests.get(url, headers=self.authorization)
+    def get_node(self, address, data):
+        for response in data:
+            if response.status_code != 200:
+                continue
 
-        if response.status_code != 200:
-            return {}
+            node_units = response.json()
+            if not node_units:
+                continue
 
-        units = response.json() or []
+            if 'HostAddr' not in node_units[0]:
+                continue
 
+            if node_units[0]['HostAddr'] in address:
+                return node_units
+        return []
+
+    def units_by_node(self, address, units):
+        units = self.get_node(address, units)
         result = {}
 
         for unit in units:
@@ -61,12 +71,16 @@ def nodes_by_pool(self):
             data = response.json()
             nodes = data.get("nodes", [])
 
+            url = "{}/docker/node/{}/containers"
+            urls = [url.format(settings.TSURU_HOST, node["Address"]) for node in nodes]
+
+            rs = (grequests.get(u, headers=self.authorization) for u in urls)
+            units = grequests.map(rs)
+
             for node in nodes:
                 dt = node["Metadata"].get("LastSuccess")
                 node["Metadata"]["LastSuccess"] = self.node_last_success(dt)
-
-                node["Units"] = self.units_by_node(node["Address"])
-
+                node["Units"] = self.units_by_node(node["Address"], units)
                 pool = node["Metadata"].get("pool")
                 nodes_by_pool = pools.get(pool, [])
                 nodes_by_pool.append(node)