Show banner when processor is loading data for the first time

The cold start on full set of projects is quite slow. Usually it
takes about 3 hours to load all commits, reviews, blueprints and emails,
and up to 8 hours to load all members data. During this period users
need to be notified that the data is incomplete.

Closes bug 1322177

Change-Id: I04432e29e3e7bbfad1a61dc463bd9193e27dde9e

dashboard/decorators.py

@@ -385,6 +385,8 @@ def templated(template=None, return_code=200):
                 stackalytics_version.version_info.version_string())
             ctx['stackalytics_release'] = (
                 stackalytics_version.version_info.release_string())
+            ctx['runtime_storage_update_time'] = (
+                vault_inst['runtime_storage_update_time'])
 
             return flask.render_template(template_name, **ctx), return_code
 

dashboard/static/css/style.css

@@ -480,3 +480,10 @@ div.stackamenu li.current-menu-item a span {
 .ui-widget-overlay {
     opacity: 0.6;
 }
+
+.banner {
+    text-align: center;
+    background-color: #ECEEF3;
+    font-size: 16px;
+    color: #972D24;
+}

dashboard/templates/layout.html

@@ -14,6 +14,7 @@
 <meta name="keywords" content="openstack, contribution, community, review, commit, {{ company }}"/>
 <meta name="version" content="{{ stackalytics_version }}"/>
 <meta name="build" content="{{ stackalytics_release }}"/>
+<meta name="runtime_storage_update_time" content="{{ runtime_storage_update_time }}"/>
 
 <link href='http://fonts.googleapis.com/css?family=PT+Sans:400,700,400italic&subset=latin,cyrillic' rel='stylesheet' type='text/css' />
 <link href='http://fonts.googleapis.com/css?family=PT+Sans+Caption&subset=latin,cyrillic' rel='stylesheet' type='text/css' />
@@ -63,9 +64,12 @@
 {% block body %}
 
     <div class="page">
+        {% if not runtime_storage_update_time %}
+            <div class="banner">Please note! The data is being loaded now and may be not complete.</div>
+        {% endif %}
     <div class="aheader">
         <div style="float: right; margin-top: 10px; margin-right: 20px;">
-            <a href="https://wiki.openstack.org/wiki/Stackalytics">About</a>
+            <a href="https://wiki.openstack.org/wiki/Stackalytics" target="_blank">About</a>
         </div>
         <div id="analytics_header">
             <div style="float: left;">

dashboard/vault.py

@@ -73,6 +73,8 @@ def get_vault():
         memory_storage_inst = vault['memory_storage']
         have_updates = memory_storage_inst.update(
             compact_records(vault['runtime_storage'].get_update(os.getpid())))
+        vault['runtime_storage_update_time'] = (
+            vault['runtime_storage'].get_by_key('runtime_storage_update_time'))
 
         if have_updates:
             vault['cache'] = {}

stackalytics/processor/main.py

@@ -294,6 +294,9 @@ def main():
     # long operation should be the last
     update_members(runtime_storage_inst, record_processor_inst)
 
+    runtime_storage_inst.set_by_key('runtime_storage_update_time',
+                                    utils.date_to_timestamp('now'))
+
 
 if __name__ == '__main__':
     main()