public interface Decider
String decide(StepExecution executions) throws Exception
When the transition is from a step, the decide method receives the StepExecution corresponding to the step as input.
When the transition is from a split, the decide method receives a StepExecution from each flow defined to the split as input.
When the transition is from a flow, the decide method receives a StepExecution corresponding to the last execution element that completed in the flow. This will be a single StepExecution if the last element was a step and multiple StepExecutions if the last element was a split.
executions- specifies the StepExecution(s) of the preceding element.
Exception- is thrown if an error occurs.
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