...
After dragging this unit into the Flow canvas, double-click it to access its configuration options. The following table describes the configuration options of this unit:
Tab | Field | Description |
|---|---|---|
General | Name | Enter a name for the unit. It must start with a letter, and cannot contain spaces. Only letters, numbers, and underscores are allowed. |
Description | Enter a description detailing the scope of the unit. | |
Expression | A JQ valid expression that will determine the behavior of the unit. | |
Result type | The type of the expected result. JSON stands for JSON String. Java stands for generic java types (Map, List, String, ...). | |
In field | Enter the name of the input event field containing JSON data. | |
Out field | Enter a name for the output event field containing the result. |
Input ports
Port | Description |
|---|---|
in | Input events. Events must contain a field to be parsed. |
Output ports
Port | Description |
|---|---|
out | Outputs successful Input events, enriched with an extra field containing the parse result. |
error | Outputs input events enriched with standard error fields. |
Example
In this example, we want to format a JSON string to JQ JSON format and send it to a my.app data table.
...
First, we will use a Tick unit to send the fields when clicked.
In the Fields tab of the properties, we need to add values in JSON format so that it can be processed as a JQ JSON.
Enter the Type as string and in the Value field, the following JSON data:
| Code Block |
|---|
{
"timestamp": 1234567890,
"report": "Age Report",
"results": [
{ "name": "John", "age": 43, "city": "TownA" },
{ "name": "Joe", "age": 10, "city": "TownB" }
]
} |
...
Then, we will link it to a JQ unit in order to format the string into JQ JSON format using an expression.
We use the following JQ valid expression in the Expression field:
| Code Block |
|---|
.results[] | select(.name | contains("Jo")) |
and fill in the rest of the fields:
...
Finally, we will link its out output port to a Devo sink unit to send the formatted events to a my.app table.
Download this example
You can try this flow by downloading this JSON and uploading it to your domain using the Import option:
| View file | ||
|---|---|---|
|