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Field Name | Field Type | Description | |
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Label*
Default Value: PipeLoop | String | Specify the name for the Snap. You can modify this to be more specific, especially if you have more than one of the same Snaps in your pipeline.
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Pipeline*
Default Value: N/A | String/Expression | Specify the path of the pipeline to execute. | |
Pipeline Parameters | Use this field set to define child pipeline parameters to use for executing the pipeline. | ||
Parameter name Default Value: N/A | String/Suggestion | Specify the parameter's name. You can also select the Pipeline Parameters defined for the pipeline selected in the Pipeline field. | |
Parameter value Default Value: N/A | String/Expression | Specify the value for thepipeline parameter, which can be an expression based on incoming documents or a constant. If you configure the value as an expression based on the input, then each incoming document or binary data is evaluated against that expression when invoking the pipeline. The result of the expression is JSON-encoded if it is not a string. The child pipeline then needs to use the | |
Loop options | Define the iteration configuration. | ||
Stop condition Default Value: N/A | String/Expression | Specify the condition to be evaluated during execution that decides whether the execution should stop or continue. The iteration continues until the stop condition is met or the iteration limit is reached. The Snap errors out if the Stop condition cannot be evaluated at run time. The stop condition is evaluated on the output document from each iteration. | |
Iteration limit Default Value: 10 | Integer/Expression | Specify the maximum limit for the number of iterations to run to avoid infinite loops. | |
Debug iteration outputs Default Value: Deselected | Checkbox | Select this checkbox to include the index, output document, and stop condition evaluation for each iteration as part of the output format.
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Execution options | Define the child pipeline execution configuration. | ||
Execute on Default Value: LOCAL_NODE | Dropdown list | Select one of the following Snaplex options to specify the target Snaplex for the child pipeline:
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Execution label Default Value: N/A | String/Expression | Specify the label to display in the Dashboard for the current execution. | |
Snap Execution Default Value: Validate & Execute | Dropdown list | Select one of the following three modes in which the Snap executes:
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Execution flow of Pipeloop Snap
The execution workflow of the PipeLoop Snap enables the parent pipeline to control and manage iterative processes using the child pipeline, for scenarios where repeated processing is needed until a specific condition is satisfied. Here are the key steps in the execution of the PipeLoop Snap:
The parent pipeline passes the input document to the child pipeline.
The child pipeline executes.
The PipeLoop Snap collects the output document from the child pipeline.
The PipeLoop Snap evaluates the stop condition based on the child pipeline’s output document.
If the stop condition is false, the Snap checks if the iteration limit is reached.
If the iteration limit is not reached, the Snap passes the output document to input (back to Step 1). The iteration stops if the stop condition is evaluated to true or the iteration limit is reached.”
Example
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