A simple presentation regarding Mule Custom Aggregator.

1. MULE CUSTOM
AGGREGATOR
BY – ANKUSH SHARMA

2. WHAT IS AN AGGREGATOR?
• A message splitter can is used to break down an outgoing message into parts and dispatch those parts
over different endpoints configured on the router. Then this is the task of aggregator to do just opposite
to splitter. An aggregator gets input from various connectors and join them in one flow. The actual
endpoint used for each object in the list is determined by a filter configured on the endpoint itself. If the
endpoint’s filter accepts the object, the endpoint will be used to route the object.

3. WHAT IS CUSTOM AGGREGATOR?
• A Custom Aggregator is an instance of a user-written class that aggregates messages. This class must
implement the interface MessageProcessor. Often, it will be useful for it to subclass AbstractAggregator,
which provides the skeleton of a thread-safe aggregator implementation, requiring only specific
correlation logic. As with most custom objects in Mule, it can be configured either with a fully specified
class name or as a reference to a Spring bean. It can also be configured with the same timeout and
failOnTimeout attributes described under Collection Aggregator.

4. MULE CUSTOM AGGREGATOR – CONFIGURATION
WIZARD (GENERAL TAB) (CONT.)

5. MULE CUSTOM AGGREGATOR – CONFIGURATION
WIZARD (GENERAL TAB)
• Following are the options on general tab –
• Display Name – The name of the component to be displayed in Mule flow.
• Class – Fully qualified class name of the custom correlation aggregate router to be used.
• Timeout – The timeout time in milliseconds.
• Message Info Mapping – Maps the current message attributes with the known message attributes.
• Store Prefix – Defines the prefix of the object store names.

6. MULE CUSTOM AGGREGATOR – CONFIGURATION
WIZARD (ADVANCED TAB) (CONT.)

7. MULE CUSTOM AGGREGATOR – CONFIGURATION
WIZARD (ADVANCED TAB)
• This tab is used to add business events tracking for the whole process of aggregator.

8. MULE CUSTOM AGGREGATOR – CONFIGURATION
WIZARD (PROPERTIES TAB) (CONT.)

9. MULE CUSTOM AGGREGATOR – CONFIGURATION
WIZARD (PROPERTIES TAB)
• This tab is used to add some spring properties that would be used in the process of aggregator.

10. MULE CUSTOM AGGREGATOR –MESSAGE INFO MAPPING
CONFIGURATION WIZARD (GENERAL TAB) (CONT.)

11. MULE CUSTOM AGGREGATOR –MESSAGE INFO MAPPING
CONFIGURATION WIZARD (GENERAL TAB) (CONT.)
• Following are the options on general tab –
• Message ID Expression – Expression for mapping message attributes to messageIdExpression.
• Correlation ID Expression – Expression for mapping message attributes to correlationIdExpression.

12. MULE CUSTOM AGGREGATOR – CONFIGURATION
WIZARD (NOTES AND META-DATA TABS)
• Notes Tab, is used to add special notes for this filter component.
• META-DATA Tab, is used to add meta-data for this filter component.

13. THANK YOU!