Logistics Wizard - Weather Recommendation

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This service is part of the larger Logistics Wizard project.

Overview

This service monitors the weather conditions around retail stores and makes recommendations on additional shipments of goods.

It is built with OpenWhisk highlighting how OpenWhisk can be used to implement a backend API. The OpenWhisk actions are:

• Recommend - given weather conditions, it evaluates the impact of the weather on shipments and stocks and makes recommendations for additional shipments, rerouting, etc.

• Retrieve - returns the recommendations to be considered by a retail store manager.

• Acknowledge - marks the recommendations as processed (approved or rejected) by a retail store manager.

• Observations - returns weather conditions at a given location.

• Notify - formats recommendations for notification messages.

Simulating weather events

For demo purpose, the Recommend action can be called interactively to inject a weather event into the system.

![Architecture](http://g.gravizo.com/g? digraph G { node [fontname = "helvetica"] rankdir=TB weather -> recommend recommend -> database database -> notify ui -> retrieve ui -> observations retrieve -> database ui -> acknowledge acknowledge -> database recommend -> erp ui -> erp {rank=same; recommend -> notify -> retrieve -> retrieve [style=invis] } {rank=source; weather -> erp -> ui [style=invis]} weather [shape=rect label="Weather Company\nData service" style=filled color="%234E96DB" fontcolor=white] recommend [label="Recommend" color="%232e8c70" style=filled fontcolor=white] notify [label="Notify" color="%232e8c70" style=filled fontcolor=white] retrieve [label="Retrieve" color="%232e8c70" style=filled fontcolor=white] acknowledge [label="Acknowledge" color="%232e8c70" style=filled fontcolor=white] observations [label="Observations" color="%232e8c70" style=filled fontcolor=white] erp [shape=rect label="ERP service" color="%238ec843" style=filled] ui [label="Dashboard" color="%23e8c228" style=filled] database [shape=circle width=1 fixedsize=true style=filled color="%234E96DB" fontcolor=white label="Database"] } )

Running the app on Bluemix

1. If you do not already have a Bluemix account, sign up here

2. The recommendation service depends on the Controller and ERP microservices. Make sure to deploy them first.

3. In Bluemix, create an instance of the Weather Company Data service

cf create-service weatherinsights Free-v2 logistics-wizard-weatherinsights

1. Create a set of credentials for this service

cf create-service-key logistics-wizard-weatherinsights for-openwhisk

1. View the credentials and take note of the url value

cf service-key logistics-wizard-weatherinsights for-openwhisk

1. Create an instance of Cloudant to store the recommendations

cf create-service cloudantNoSQLDB Lite logistics-wizard-recommendation-db

1. Create a set of credentials for this service

cf create-service-key logistics-wizard-recommendation-db for-openwhisk

1. View the credentials and take note of the url value

cf service-key logistics-wizard-recommendation-db for-openwhisk

1. Clone the app to your local environment from your terminal using the following command:

git clone https://github.com/acme-freight/logistics-wizard-recommendation.git

1. cd into the checkout directory

2. Copy the file named template-local.env into local.env

cp template-local.env local.env

1. In local.env, update the location of the CONTROLLER_SERVICE, the url of the Weather Company Data service, the url of the Cloudant database.

2. Get the dependencies, and use webpack module bundler to create our final .js actions in the dist folder.

npm install
npm run build

1. Ensure your OpenWhisk command line interface is property configured with:

wsk list

This shows the packages, actions, triggers and rules currently deployed in your OpenWhisk namespace.

1. Deploy the OpenWhisk artifacts

./deploy.sh --install

Note: the script can also be used to --uninstall the OpenWhisk artifacts to --update the artifacts if you change the action code, or simply with --env to show the environment variables set in local.env.

Code Structure

File	Description
deploy.sh	Helper script to create the recommendations database, install, uninstall, update the OpenWhisk trigger, actions, rules.
template-local.env	Contains environment variables used by the deployment script. Duplicate this file into local.env to customize it for your environment.
package.json	List dependencies used by the actions and the build process.
webpack.config.js	Webpack configuration used to build OpenWhisk actions. This allows the actions to use modules (module versions) not packaged natively by OpenWhisk. Make sure to add explicit dependencies in the package.json for specific module versions used by the actions. The webpack build will look at the "dependencies" and webpack them. If a module is not listen in "dependencies" it is assumed to be provided by OpenWhisk.
recommend.js	Entry point for the Recommend action.
prepare-for-slack.js	Entry point for the Notify action. It formats newly added recommendations into a text suitable for a Slack post message.
retrieve.js	Entry point for the Retrieve action.
acknowledge.js	Entry point for the Acknowledge action.
observations.js	Entry point for the Observations action.
test	Unit test for the actions to be executed outside of OpenWhisk.

Troubleshooting

Polling activations is good start to debug the OpenWhisk action execution. Run

wsk activation poll

and invoke actions.

License

See License.txt for license information.