Placeholders

Placeholders allow you to customize your message templates with custom content when sending data to services. To generate placeholders for all placeholders present in the message/header/properties section, click on the “Generate” button. Make sure to use double curly braces to represent a placeholder in your template.

Here’s an example message template:

{
  "NodeId": "",
  "ApplicationUri": "",
  "DisplayName": "",
  "Value": {
    "StatusCode": {
      "Symbol": "",
      "Code": ""
    },
    "SourceTimestamp": ""
  }
}

After clicking on the generate button, the placeholder section on the right side of the screen will show all the placeholders generated for the placeholders in the template.

NodeId
ApplicationUri
DisplayName
Symbol
Code
SourceTimestamp

then you can see the section like below generated with all placeholders with string random as the placeholder filling method

You can change the placeholder generation method by selecting the respective option from the dropdown. You can find the available options below.

Once you click on the preview button, you can see how the placeholders will prepare the message for you. Here’s an example of the default sample:

{
  "NodeId": "LEqRZts4j",
  "ApplicationUri": "h1eTcA",
  "DisplayName": "2eQKT",
  "Value": {
    "StatusCode": {
      "Symbol": "ZojTDysL",
      "Code": "dU5orT4vl"
    },
    "SourceTimestamp": "x5P5aQP"
  }
}

Placeholder Generation Options

You can use several functionalities to generate the placeholders. Here are the available options and their descriptions:

String - Random

This option generates a random string using upper and lower alphabets.

String - Random List

This option takes a random string provided from the list. You can provide values with comma separation.

Example:

abc,bcd,cde

String - Sequence List

This option takes a string in sequence from the list. You can provide values with comma separation.

Example:

abc,bcd,cde

Integer - Random

This option generates a random integer.

Integer - Random List

This option takes a random integer provided from the list. You can provide values with comma separation.

Example:

5,7,12

Integer - Sequence List

This option takes a integer in sequence from the list. You can provide values with comma separation.

Example:

5,7,12

Integer - Step by

This option takes a integer in sequence with steps based on your increment value and initial value.

Example:

Starts with = 5
Increment by = 3

Result : 5, 8, 11, 14....

Double - Random

This option generates a random decimal number.

Double - Random List

This option takes a random decimal number provided from the list. You can provide values with comma separation.

Example:

5.5, 7.5, 12.5

Double - Sequence List

This option takes a decimal number in sequence from the list. You can provide values with comma separation.

Example:

5.5, 7.5, 12.5

Integer - Step by

This option takes a decimal number in sequence with steps based on your increment value and initial value.

Example:

Starts with = 5
Increment by = 3.5

Result : 5, 8.5, 12, 15.5....

Boolean - Random

This option generates a random boolean.

Boolean - Sequence List

This option takes a boolean in sequence from the list. You can provide values with comma separation.

Example:

true,true,false

Guid

This option generates a V4 guid.

sample result below

ffa1db86-c73f-4e45-852c-4d9f6b37c90f

Time - in UTC

This option generates current time in UTC.

Time - in local

This option generates current time in local timezone.

Time - in Epoch

This option generates current time in Epoch/Unix time.

Time - in Epoch Milliseconds

This option generates current time in Epoch milliseconds / ticks Format.