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Geolocation-Aware Demo Applications with Redis

This demonstrate geospatial search.

  • Know how Geo-aware solutions are used and which problems are addressed by them
  • Understand and be able to present the technology basics
  • Understand the technical details of the Redis Geo* commands and their approach to support geo-spatial use cases
  • Understand the data modeling basics
  • Get insights how geo-spatial solutions are implemented with traditional vendors
  • Know where to find additional resources about how to implement location-aware applications with Redis

Pre-requisite

Cloning the Repository

https://github.com/redislabs-training/training-geo-public
  • Prepare a Python 3.x development environment! The Python dependencies need to be installed:
  • Flask
  • Redis
pip install flask
  • Setting up virtualenv
cd geoapp
sudo easy_install virtualenv
virtualenv --python=python3 geoappvenv

$ virtualenv  geoappvenv
created virtual environment CPython2.7.16.final.0-64 in 512ms
  creator CPython2macOsFramework(dest=/Users/ajeetraina/training-geo-public/geoapp/geoappvenv, clear=False, global=False)
  seeder FromAppData(download=False, pip=latest, setuptools=latest, wheel=latest, via=copy, app_data_dir=/Users/ajeetraina/Library/Application Support/virtualenv/seed-app-data/v1.0.1)
  activators PythonActivator,CShellActivator,FishActivator,PowerShellActivator,BashActivator
ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp %

$ source geoappvenv/bin/activate
(geoappvenv) ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp %

$ pip install -r requirements.txt
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Collecting flask
  Using cached Flask-1.1.1-py2.py3-none-any.whl (94 kB)
Collecting redis
  Using cached redis-3.4.1-py2.py3-none-any.whl (71 kB)
Collecting Werkzeug>=0.15
  Using cached Werkzeug-1.0.0-py2.py3-none-any.whl (298 kB)
Collecting click>=5.1
  Using cached click-7.1.1-py2.py3-none-any.whl (82 kB)
Collecting itsdangerous>=0.24
  Using cached itsdangerous-1.1.0-py2.py3-none-any.whl (16 kB)
Collecting Jinja2>=2.10.1
  Using cached Jinja2-2.11.1-py2.py3-none-any.whl (126 kB)
Collecting MarkupSafe>=0.23
  Using cached MarkupSafe-1.1.1-cp27-cp27m-macosx_10_6_intel.whl (17 kB)
Installing collected packages: Werkzeug, click, itsdangerous, MarkupSafe, Jinja2, flask, redis
Successfully installed Jinja2-2.11.1 MarkupSafe-1.1.1 Werkzeug-1.0.0 click-7.1.1 flask-1.1.1 itsdangerous-1.1.0 redis-3.4.1
(geoappvenv) ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp %

python --version
3.7.x

ajeetraina@Ajeet-Rainas-Macbook-Pro training-geo-public % cd geoapp
ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp % ls
app.py			config.pyc		data			importer.py		templates
config.py		config_default.py	geoappvenv		requirements.txt
ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp % virtualenv --python=python3 geoappvenv
created virtual environment CPython3.7.6.final.0-64 in 524ms
  creator CPython3Posix(dest=/Users/ajeetraina/training-geo-public/geoapp/geoappvenv, clear=False, global=False)
  seeder FromAppData(download=False, pip=latest, setuptools=latest, wheel=latest, via=copy, app_data_dir=/Users/ajeetraina/Library/Application Support/virtualenv/seed-app-data/v1.0.1)
  activators PythonActivator,FishActivator,XonshActivator,CShellActivator,PowerShellActivator,BashActivator
ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp % source geoappvenv/bin/activate
(geoappvenv) ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp % pip install -r requirements.txt
Collecting flask
  Using cached Flask-1.1.1-py2.py3-none-any.whl (94 kB)
Collecting redis
  Using cached redis-3.4.1-py2.py3-none-any.whl (71 kB)
Collecting click>=5.1
  Using cached click-7.1.1-py2.py3-none-any.whl (82 kB)
Collecting Jinja2>=2.10.1
  Using cached Jinja2-2.11.1-py2.py3-none-any.whl (126 kB)
Collecting itsdangerous>=0.24
  Using cached itsdangerous-1.1.0-py2.py3-none-any.whl (16 kB)
Collecting Werkzeug>=0.15
  Using cached Werkzeug-1.0.0-py2.py3-none-any.whl (298 kB)
Collecting MarkupSafe>=0.23
  Downloading MarkupSafe-1.1.1-cp37-cp37m-macosx_10_6_intel.whl (18 kB)
Installing collected packages: click, MarkupSafe, Jinja2, itsdangerous, Werkzeug, flask, redis
Successfully installed Jinja2-2.11.1 MarkupSafe-1.1.1 Werkzeug-1.0.0 click-7.1.1 flask-1.1.1 itsdangerous-1.1.0 redis-3.4.1
(geoappvenv) ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp % python --version
Python 3.7.6

Run Redis with authentication

redis-server --requirepass redis12#

Redis Configuration File

Configure the application to use your Redis database via the file ‘config.py’!

Open config.py placed under geo-public/geoapp

ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp % pwd
/Users/ajeetraina/training-geo-public/geoapp
ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp % cat config.py
REDIS_CFG = {
	"host" : "localhost",
	"port" : 6379,
	"password" : "redis12#"
}
ajeetraina@Ajeet-Rainas-Macbook-Pro geoapp %

Verify the Database connectivity

python config.py

Import Data

  • Change the directory to the source code directory ‘geo-app’!
  • Take a look at the Python script ‘importer.py’!
  • Run the Python script ‘importer.py’ via python importer.py!
  • Wait until the import completes. The importer shows the message ‘Import of 16790 records completed’.
id = 355, name = Cedar Brewing, lng = -91.6918, lat = 41.9625
id = 505, name = English Ales Brewery, lng = -121.804, lat = 36.6802
id = 545, name = Fort Collins Brewery, lng = -105.042, lat = 40.5832
id = 563, name = Fuller, Smith & Turner PBC, lng = -0.2498, lat = 51.4877
id = 720, name = John Harvard's Brew House - Harvard Square, lng = -71.1193, lat = 42.3724
id = 1028, name = Pumphouse Pizza and Brewing, lng = -89.7937, lat = 43.6011
id = 1229, name = T-Bonz Gill, Grill and Brewery, lng = -79.875, lat = 32.8091
id = 421, name = Cugino Brewing Company, lng = -88.2776, lat = 41.8539
id = 626, name = Hambleton Ales, lng = -1.4844, lat = 54.1744
id = 762, name = Labatt Ontario Breweries, lng = -81.2467, lat = 42.9778
id = 915, name = Ninkasi Brewing, lng = -123.11, lat = 44.0569
id = 930, name = Oaken Barrel Brewing, lng = -86.0901, lat = 39.615
Import of 16790 records completed.

Verification

redis-cli -a redis12# --scan

Testing the application

  • Change the directory to the source code directory ‘geo-app’!
  • Run the command python app.py
  • The application listens on port 5000, so you will be able to reach it via http://localhost:5000
open http://0.0.0.0:5000

Click on "Test DB Connectivity"

Database connectivity works as expected!

Enter the City Name as "New York" and range as "50 miles" and it should show that number of breweries shops.

Next > RedisInsight inside Docker container