This topic contains the following sections:
Use the AggregateControl node to mark the beginning of a fan-out of requests that are part of an aggregation.
Aggregation is an extension of the request/reply application model. It combines the generation and fan-out of a number of related requests with the fan-in of the corresponding replies, and compiles those replies into a single aggregated reply message.
The aggregation function is provided by the following three nodes:
The AggregateControl node is represented in the workbench by the following icon:
When you have put an instance of the AggregateControl node into a message flow, you can configure it. Right-click the node in the editor view and click Properties. The node's basic properties are displayed.
All mandatory properties for which you must enter a value (those that do not have a default value defined) are marked with an asterisk on the properties dialog.
Configure the AggregateControl node as follows:
Click Cancel to close the dialog and discard all the changes that you have made to the properties.
The AggregateControl node terminals are described in the following table.
Terminal | Description |
---|---|
In | The input terminal that accepts a message for processing by the node. |
Out | The output terminal to which the original message is routed when processing completes successfully. |
Control | The output terminal to which a control message is routed.
The control message is sent to a corresponding AggregateReply node. Note: The Control terminal is
deprecated in Version 6.0, to use connections from the Control terminal see, Using control messages in aggregation flows.
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The following tables describe the node properties; the column headed M indicates whether the property is mandatory (marked with an asterisk on the properties dialog if you must enter a value when no default is defined), the column headed C indicates whether the property is configurable (you can change the value when you add the message flow to the bar file to deploy it).
The AggregateControl node Basic properties are described in the following table.
Property | M | C | Default | Description |
---|---|---|---|---|
Aggregate Name | Yes | Yes | A name that can be used to associate the fan-out message flow with the fan-in message flow. | |
Timeout (secs) | Yes | No | 0 | The amount of time, in seconds, for which replies are waited to arrive at the fan-in. |
The AggregateControl node Description properties are described in the following table.
Property | M | C | Default | Description |
---|---|---|---|---|
Short Description | No | No | A brief description of the node. | |
Long Description | No | No | Text that describes the purpose of the node in the message flow. |
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