Add Docker Swarm interface.

app/main/forms.py

@@ -0,0 +1,6 @@
+from flask_wtf import FlaskForm
+from wtforms import SubmitField
+
+
+class SwarmForm(FlaskForm):
+    submit = SubmitField('Submit')

app/main/views.py

@@ -1,9 +1,12 @@
-from flask import render_template
+from flask import redirect, render_template, url_for
 from ..models import User
 from ..tables import AdminUserTable, AdminUserItem
 from . import main
 from ..decorators import admin_required
-from flask_login import login_required
+from flask_login import current_user, login_required
+from .forms import SwarmForm
+from ..import swarm
+from threading import Thread
 
 
 @main.route('/')
@@ -16,7 +19,7 @@ def about():
     return render_template('main/about.html.j2', title='About')
 
 
-@main.route('/admin')
+@main.route('/admin', methods=['GET', 'POST'])
 @login_required
 @admin_required
 def for_admins_only():
@@ -26,5 +29,32 @@ def for_admins_only():
     users = User.query.order_by(User.username).all()
     items = [AdminUserItem(u.username, u.email, u.role_id, u.confirmed) for u in users]
     table = AdminUserTable(items)
+
+    swarm_form = SwarmForm()
+    if swarm_form.validate_on_submit():
+        '''
+        ' TODO: Implement a Job class. For now a dictionary representation is
+        '       enough.
+        '''
+        job = {
+            'creator': current_user.id,
+            'id': '5fd40cb0cadef3ab5676c4968fc3d748',
+            'requested_cpus': 2,
+            'requested_memory': 2048,
+            'service': 'ocr',
+            'service_args': {
+                'lang': 'eng'
+            },
+            'status': 'queued'
+        }
+        '''
+        ' TODO: Let the scheduler run this job in the background. Using self
+        '       created threads is just for testing purpose as there is no
+        '       scheduler available.
+        '''
+        thread = Thread(target=swarm.run, args=(job,))
+        thread.start()
+        return redirect(url_for('main.for_admins_only'))
+
     return render_template('main/admin.html.j2', title='Administration tools',
-                           table=table.__html__())
+                           swarm_form=swarm_form, table=table.__html__())