Cloud of Things Java Rest SDK

The Cloud of Things (German Cloud der Dinge) is a platform for the Internet of Things by T-Systems International GmbH. Inside this repository you will find a Java based SDK to interface with the Cloud of Things API.

Current version is: 2.0.0

Usage

Add this to your pom.xml to include the SDK in your Maven Repo

<dependency>
    <groupId>com.telekom.m2m.cot</groupId>
    <artifactId>java-rest-client</artifactId>
    <version>2.0.0</version>
</dependency>

Example of a basic connect to the platform:

CloudOfThingsPlatform cotPlatform = new CloudOfThingsPlatform("hostname", new CotCredentials("tenant", "username", "password"));
InventoryApi inventoryApi = cotPlatform.getInventoryApi();
inventoryApi.get("idOfManagedObject");

Developers can find further information and examples in the DEVELOPER.md file.

Java Doc

You can find the Java Doc of the latest release here: http://cloud-of-things.github.io/cot-java-rest-sdk/

Release Notes

Short information about what has changed between releases.

Release 2.0.0

• Measurement real time notification functionality was moved from InventoryApi to MeasurementApi

• Prevent injection in update method (Pull Request #90).

• More robust deserialization catching IllegalArgumentException being thrown by Spring Boot Class Loader for properties like "A+:1" in ThreePhaseElectricityMeasurement (Pull Request #91).

• Fix erroneously wrapped numeric values in deserialized ExtensibleObjects (Pull Request #92), e.g.: serialized Object: temperature=ExtensibleObject{anyObject={unit=°C, value=100.0}} will be deserialized into:

  OLD:
  "temperature":{
      "value":{
          "value":"100.0"
      },
      "unit":"°C"
  }
  
  FIXED:
  "temperature":{
      "value":100.0,
      "unit":"°C"
  }
  

• Includes Pull Request #94:

  • Usage of newest dependencies
  • Cleanup and improvements according to code inspection

• EventApi provides the update of events as well now. (Pull Request #95)

• Fixed cast in getSource() method of Alarm and Event

• Added the getter as counterpart of set(Object) in ExtendedObject

• Includes (Pull Request #96):

  • Fixed some unstable integration tests due to maybe changed behavior of the c8y API
  • Provided more details from the c8y error message in CotSdkException

Release 1.1.0

• Includes Pull Request #73: Efficiently iterate over all objects in a collection via Java 8 Stream (accessible via stream()): pagination is automatically performed in the background
• Resolve issue #72: Improved paging performance
• Fix double slashes in url (Pull Request #77)

Release 1.0.5

• Provide functionality to get all SmartREST Templates by X-ID
• Resolve issue #52: provide http status code in thrown exception in getMeasurement()

Release 1.0.4

• Improve usage of accept and content-type headers in rest client
• Improve usage of OkHttpClient so that lesser resources will be used
• Fix handling of binary data using byte array
• Remove double slashes in rest api paths to avoid http code 404
• Resolve issue #51: provide failure reason for failed operations
• Resolve issue #53: provide a new method for creation NewDeviceRequests
• Handle filters as enum and validate filters supported by cot
• Improve Notification class which now provides realtime action

Release 1.0.2

• Update of okhttp.
• Better integration-tests.
• Better login-process (include tenant in username).
• NewDeviceRequestStatus-enum.
• Refactoring.

Release 1.0.0

• Improved Examples: Add examples for SDK-Users (see DEVELOPER.md)
• Implemented Sensor Library
• Implemented Binaries API
• Final adjustments for MIT License
• Improve ManagedObject-deserialization
• Credentials for integration tests will be read from environment variables instead of property file
• Refactor device permission handling
• A lot of improvements and cleanups

Release 0.6.1

• Provides and uses SmartRequest/-Response classes

Release 0.6.0

• Complete Device control
• Complete Real-time notifications
• Complete Real-time statements
• Complete Device management library
• Complete Users API
• Complete Retention Rule API
• Complete SmartREST API
• Complete Audit API
• Refactor collection classes extending JsonArrayPagination base class

Release 0.5.0

• Most important change is the removal of right now unused parameter tenant in CloudOfThingsPlatform constructor (See commit 62079fe).
• Unsuccessful creation/store of objects in the CoT will now result in a CotSdkException.
• New method DeviceCredentialsApi.NewDeviceRequest(..).
• MeasurementsApi supports creating measurement collections.

Release 0.4.0

• Improvements, e.g. connection exception handling
• Short information about what has changed between releases.
• Bulk Operations (beta)

Release 0.3.0

• Complete Inventory
• Get ManagedObjects in Collection
• Complete Alarm API
• Retrieve collections
• Update Alarms
• Complete Device Credentials API
• Complete IdentityApi

Release 0.2.0

• Complete Events
• Complete Device registration process
• Implement removal of devices and its belongings
• Complete MeasurementsAPI
• Refactor from single methods to Query objects.
• Filter Date
• Filter FragmentType
• ... and combinations
• DELETE - delete a measurement collection
• Complete Inventory
• DELETE a managed object reference