Scripting examples

Script input and output

Encode Function

Input to the encoder is an object (for example, impactRequest). The following table lists the methods that are required in the script.

Table 1. Encode function methods
Method	Remark
utils.getRequestType(impactRequest);	var utils = Java.type('com.nokia.adapter.transformation.utils.TranformerUtil'); This method is used to identify the request type. Supported values: write and read
impactRequest.getCorrelatorId()	Returns the correlator ID of the request.
impactRequest.getValue()	Returns value of the resource.
impactRequest.getResource()	Returns the resource path for the request.

The output of encode function is expected to be a json string. utils.createMqttEncodeResponse(response) method in utils form the return message.

Decode Function

The input to the decoder is an object (for example, decodeCtx). The following methods are used in the script.

Table 2. Decode Function Methods
Method	Remark
decodeCtx.getUplinkMessage();	This returns an int8 array and contains the payload from the device of type PublishMessage.
client.getEndpoint();	Returns serial number of the device.

PublishMessage

Table 3. PublishMessage parameters
Parameters	Description
topic	Resource path published by the device.
payload	Payload published by the device

The output response of encode function is expected to be a json string.

utils.createMqttDecodeResponse(response) function must be called to create the decode function.