Use the Passthrough node to enable version control of a subflow at run time.
This topic contains the following sections:
The Passthrough node does not process the message in any way. The message that it propagates on its Out terminal is the same message that it received on its In terminal.
The Passthrough node is contained in the Construction drawer of the palette, and is represented in the IBM Integration Toolkit by the following icon:
Use this node to identify a subflow; for example, if you develop an error processing subflow to include in several message flows, you might want to modify that subflow. However, you might want to introduce the modified version initially to just a subset of the message flows in which it is included. Set a value for the instance of the Passthrough node that identifies which version of the subflow you have included.
When you have put an instance of the Passthrough node into a message flow, you can configure it. For more information, see Configuring a message flow node. The properties of the node are displayed in the Properties view. All mandatory properties for which you must enter a value (those that do not have a default value defined) are marked with an asterisk.
The Passthrough 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 that delivers a message to the subflow. |
The following tables describe the node properties. The column headed M indicates whether the property is mandatory (marked with an asterisk 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 Passthrough node Description properties are described in the following table.
Property | M | C | Default | Description |
---|---|---|---|---|
Node name | No | No | Passthrough | The name of the node. |
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. |
The Passthrough node Basic properties are described in the following table.
Property | M | C | Default | Description |
---|---|---|---|---|
Label | No | No | The label (identifier) of the node. Enter a value that defines a unique characteristic; for example, the version of the subflow in which the node is included. |
Property | M | C | Default | Description |
---|---|---|---|---|
Events | No | No | None | Events that you have defined for the node are
displayed on this tab. By default, no monitoring events are defined
on any node in a message flow. Use Add, Edit,
and Delete to create, change or delete monitoring
events for the node; see Configuring monitoring event sources using monitoring properties for details. You can enable and disable events that are shown here by selecting or clearing the Enabled check box. |