Mule Batch Filter allows applying one or more filters to batch steps within a batch job to streamline processing by focusing only on relevant data. Filters are applied using an Accept Expression to process records that evaluate to true, filtering out records that evaluate to false. Configuration options for batch filters include the filter name, accept expression, and accept policy. Batch filters can only be applied to batch steps within the batch process phase, not the input or on complete phases. By default, batch steps process only records that succeeded in all preceding steps if no filter is applied.

1. Mule Batch Filter
By – Ankush Sharma

2. What is Mule Batch Filter?
 You can apply one or more filters as attributes to any number of batch steps within your batch job.
By having batch steps accept only some records for processing, you streamline processing so that
Mule focuses only on the data which is relevant for a particular batch step.
 Filters are applied within batch steps. Use an Accept Expression to process only those records which,
relative to the MEL expression, evaluate to true; if the record evaluates to false, the batch step does
not process the record. In other words, those records with a filter expression that resolves to false
are the ones Mule filters out.

3. Prerequisites for Mule Batch Filter
 The user must be familiar with Anypoint Studio.
 Know basics of Batch Processing.
 understand how batch jobs handle records which fail processing.

4. Mule Batch Filter – Configuration Wizard
(General Tab)
 Following are the options on batch filter –
 Name – The name of the batch filter component.
 Accept Expression – Expression that will be evaluated for acceptance.
 Accept Policy – This tells what results to accept or discard.

5. Mule Batch Filter – Configuration Wizard
(Notes Tab)
 This tab is used to add special notes for Mule Batch Filter component.

6. Mule batch component characteristics
 Batch filters only apply to batch steps which, in turn, are only usable
within the batch process phase of a batch job. You cannot apply filters
with the Input or On Complete phases.
 If you apply no filters to a batch step, the batch processes only those
records which succeeded processing in all preceding steps. In other words,
the default Accept Policy applied to all batch steps is NO_FAILURES.
 When a batch job instance exceeds its max-failed-records value,
regardless of the filter set on the batch step, the step does not process
any records, and simply pushes the failed batch job instance to the On
Complete phase. Read more about failure handling in batch jobs.

7. Thank You!