accelerometer-rest-to-cassandra

REST API receiving accelorometers data and storing them into Cassandra. Each acceleration contains:

• date when it has been captured as a timestamp (eg, 1428773040488)
• acceleration force along the x axis (unit is m/s²)
• acceleration force along the y axis (unit is m/s²)
• acceleration force along the z axis (unit is m/s²)

Prerequisites

• Cassandra 3.10 installed
• Java 8+
• Gradle 3.4+

Start Cassandra

First step is to start Cassandra: sudo sh /bin/cassandra

We don't need any specific configuration, so Cassandra can be started using the default configuration. Cassandra will listen on http://localhost:9042

Next step is to start the console to use CQL: sudo sh /bin/cqlsh

Then now you can execute the command listed in the project data.cql

Start the application

gradle build && java -jar build/libs/accelerometer-rest-to-cassandra-1.0.jar

Use the API

/POST http://localhost:8080/activity/acceleration

• Header Content-Type must be set: application/json
• body:

{
  "timestamp": 1428773040488,
  "x": 0.98,
  "y": 6.43,
  "z": 9.01,
}

• returned status: 201 CREATED

/GET http://localhost:8080/activity/acceleration

• return the last prediction result

/POST http://localhost:8080/activity/training

• Header Content-Type must be set: application/json
• body:

{
  "user_id": "user1",
  "activity": "walking",
  "timestamp": 1428773040488,
  "x": 0.98,
  "y": 6.43,
  "z": 9.01,
}

• returned status: 201 CREATED