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Make job page poll for updates

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This is a first go at having the job page update without refreshing.

The approach I’ve taken is to do all the rendering of HTML on the server side,
rather than use a Javascipt templating engine like mustache. This ensures that
we don’t have to maintain two sets of templates.

So the approach is to split the job page into partials. These partials can then:
- be included in the job page to render the whole page
- be rendered indivudually and then returned as a blob of HTML inside a JSON
  response

Then I’ve added a Javascript module which looks for areas of the page that should
be reloaded. For each area of the page it will poll a URL and re-render that
section of the page when it gets new HTML. It implements some throttling so that
API calls will never happen more frequently than 0.67 times/second.
This commit is contained in:
Chris Hill-Scott
2016-03-02 17:36:20 +00:00
parent 0e663e044f
commit b31c9fbc0d
10 changed files with 259 additions and 115 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
app/main/views/jobs.py
View File

@@ -4,7 +4,8 @@ import time
from flask import (
render_template,
abort
abort,
jsonify
)
from flask_login import login_required
from notifications_python_client.errors import HTTPError
@@ -15,8 +16,6 @@ from app.main import main
from app.main.dao import templates_dao
from app.main.dao import services_dao
now = time.strftime('%H:%M')
@main.route("/services/<service_id>/jobs")
@login_required
@@ -24,7 +23,7 @@ def view_jobs(service_id):
try:
jobs = job_api_client.get_job(service_id)['data']
return render_template(
'views/jobs.html',
'views/jobs/jobs.html',
jobs=jobs,
service_id=service_id
)
@@ -44,16 +43,16 @@ def view_job(service_id, job_id):
notifications = notification_api_client.get_notifications_for_service(service_id, job_id)
finished = job['status'] == 'finished'
return render_template(
'views/job.html',
'views/jobs/job.html',
notifications=notifications['notifications'],
counts={
'queued': 0 if finished else job['notification_count'],
'sent': job['notification_count'] if finished else 0,
'failed': 0
'failed': 0,
'cost': u'£0.00'
},
uploaded_at=job['created_at'],
finished_at=job['updated_at'] if finished else None,
cost=u'£0.00',
uploaded_file_name=job['original_file_name'],
template=Template(
templates_dao.get_service_template_or_404(service_id, job['template'])['data'],
@@ -70,9 +69,47 @@ def view_job(service_id, job_id):
raise e
@main.route("/services/<service_id>/jobs/<job_id>.json")
@login_required
def view_job_updates(service_id, job_id):
service = services_dao.get_service_by_id_or_404(service_id)
try:
job = job_api_client.get_job(service_id, job_id)['data']
notifications = notification_api_client.get_notifications_for_service(service_id, job_id)
finished = job['status'] == 'finished'
return jsonify(**{
'counts': render_template(
'partials/jobs/count.html',
counts={
'queued': 0 if finished else job['notification_count'],
'sent': job['notification_count'] if finished else 0,
'failed': 0,
'cost': u'£0.00'
}
),
'notifications': render_template(
'partials/jobs/notifications.html',
notifications=notifications['notifications']
),
'status': render_template(
'partials/jobs/status.html',
uploaded_at=job['created_at'],
finished_at=job['updated_at'] if finished else None
),
})
except HTTPError as e:
if e.status_code == 404:
abort(404)
else:
raise e
@main.route("/services/<service_id>/jobs/<job_id>/notification/<string:notification_id>")
@login_required
def view_notification(service_id, job_id, notification_id):
now = time.strftime('%H:%M')
return render_template(
'views/notification.html',
message=[