Kinota™ Big Data is a modular open-source implementation of OGC SensorThings API Part 1: Sensing; referred to as "STA" hereafter. Kinota was developed to support multiple persistence backends including traditional RDBMS as as well as NoSQL databases; currently the only persistence backend is for Apache Cassandra.
Kinota Big Data is licensed under GNU Lesser General Public License v3.0 (LGPLv3); you may not use this file except in compliance with the License. For more information, please refer to the included license.
Kinota Big Data is made up of the following sub-projects/modules.
kinota-commons includes base classes defining STA objects (e.g. Thing, Location, Datastream, etc.; these base classes also know how to serialize themselves to JSON) as well as high-level service layer definitions for performing CRUD operations for each STA object (including JSON deserialization). The commons module also includes REST service definitions (which are built using Jersey), as well as other utility and helper classes and methods that are shared or likely to be shared across modules.
kinota-persistence-cassandra is the persistence backend for Apache Cassandra.
kinota-rest-cassandra defines a Spring Boot application used to deploy an STA REST API with data stored in an Apache Cassandra cluster. kinota-rest-cassandra also includes an implementation of JSON Web Token (JWT) authentication for limiting access to CUD (create, update, delete) operations. Note that in the near future we plan to split JWT authentication components into a separate module (e.g. cassandra-security-jwt).
Kinota Big Data currently implements of subset of OGC SensorThings API Part 1: Sensing. See the table below for a summary of currently supported features (numbers refer to relevant sections of the STA specification).
| Feature | Supported? |
|---|---|
| SensorThings Service Interface | |
| 9.2 Resource Path | |
| 9.2.1 Usage 1: no resource path | Yes |
| 9.2.2 Usage 2: address to a collection of entities | Yes |
| 9.2.3 Usage 3: address to an entity in a collection | Yes |
| 9.2.4 Usage 4: address to a property of an entity | No |
| 9.2.5 Usage 5: address to the value of an entity’s property | No |
| 9.2.6 Usage 6: address to a navigation property (navigationLink) | Yes |
| 9.2.7 Usage 7: address to an associationLink | Yes |
| 9.2.8 Usage 8: nested resource path | No |
| 9.3 Requesting Data | |
| 9.3.2 $expand and $selected | No |
| 9.3.3 Query Entity Sets | |
| 9.3.3.1 $orderby | No |
| 9.3.3.2 $top | Yes |
| 9.3.3.3 $skip | Yes |
| 9.3.3.4 $count | No |
| 9.3.3.5 $filter | No |
| 9.3.3.6 Server-Driven Paging | Yes |
- Create-Update-Delete | 10.2 Create an entity | 10.2.1.1 Link to existing entities when creating an entity | Yes 10.2.1.2 Create related entities when creating an entity | No 10.3 Update an entity | Yes 10.4 Delete an entity | Yes
- Batch Requests | No
- SensorThings MultiDatastream extension | No
- SensorThings Data Array Extension | Yes
- SensorThings Sensing MQTT Extension | No
Kinota Big Data requires the following:
- Java 8
- Maven 3
- Apache Cassandra 3.x (to use the default Cassandra persistence backend)
Coming soon!
Unit and integration tests use an embedded version of Apache Cassandra to allow easy development from a single developer machine.
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