SOA Magazine IV 01.2015
SOA Magazine IV 01.2015
SOA Magazine IV 01.2015
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BPM 12c Gateways<br />
Oracle BPM provides us with various components to control the flow of a process such as gateways,<br />
timer events, errors, message events, send and receive tasks, loop markers and multi-instance markers.<br />
In this article I will be elaborating the gateway control flow components and how we can use them to<br />
define the flow of our process. Gateways are very similar to a flowchart decision element. Using a<br />
gateway you can define the control points within your process by splitting and merging paths. At<br />
runtime a gateway will determine based on the control points defined at design time the path that a<br />
token will take through a process. There are five gateway types; Exclusive Gateway (XOR), Inclusive<br />
Gateway (OR), Parallel Gateway, Event Based Gateway and Complex Gateway.<br />
Exclusive Gateway<br />
Exclusive and Inclusive gateways consist of two outbound sequence flows; a default sequence flow<br />
representing the normal path between two objects and a conditional sequence flow to control the<br />
process flow based on the evaluation of an expression.<br />
The "Exclusive Gateway" is one of the most commonly used gateways where you can split your process<br />
into two or more paths. When a token reaches an exclusive gateway each of the conditional outbound<br />
sequence flows is evaluated in the order that you specified during design time when configuring the<br />
exclusive gateway and the first conditional flow that is evaluated to true is taken. If none of the<br />
conditional outbound sequence flows evaluates to true then the token moves down the default<br />
sequence flow. Please note that if you do not specify a default outbound sequence flow on an "Exclusive<br />
Gateway" you will get an error at design time and will not be able to compile and deploy your process.<br />
So let's see how you use an "Exclusive Gateway" to control the flow of a process. I have created a new<br />
BPM application using the "BPM Application" JDeveloper template and in the "Project <strong>SOA</strong> Settings"<br />
step i have selected "Composite with BPMN Process".<br />
Copyright © 2015 | All Rights Reserved <strong>SOA</strong> <strong>Magazine</strong> <strong>IV</strong> 79
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