public virtual IProcessInstanceWithVariables Execute(CommandContext commandContext)
{
var processDefinition =
new GetDeployedProcessDefinitionCmd(InstantiationBuilder, false).Execute(commandContext);
foreach (var checker in commandContext.ProcessEngineConfiguration.CommandCheckers)
{
checker.CheckCreateProcessInstance(processDefinition);
}
var modificationBuilder = InstantiationBuilder.ModificationBuilder;
EnsureUtil.EnsureNotEmpty(
@"At least one instantiation instruction required (e.g. by invoking startBefore(..), startAfter(..) or startTransition(..))", "instructions", ListExt.ConvertToIlist(modificationBuilder.ModificationOperations));
// instantiate the process
var initialActivity = DetermineFirstActivity(processDefinition, modificationBuilder);
ExecutionEntity processInstance = (ExecutionEntity)processDefinition.CreateProcessInstance(InstantiationBuilder.BusinessKey,
InstantiationBuilder.CaseInstanceId, initialActivity);
processInstance.SkipCustomListeners = modificationBuilder.SkipCustomListeners;
var variables = modificationBuilder.ProcessVariables;
ExecutionVariableSnapshotObserver variablesListener = new ExecutionVariableSnapshotObserver(processInstance);
processInstance.StartWithoutExecuting(variables);
// prevent ending of the process instance between instructions
processInstance.PreserveScope = true;
// apply modifications
var instructions = modificationBuilder.ModificationOperations;
for (var i = 0; i < instructions.Count; i++)
{
var instruction = instructions[i];
Log.DebugStartingInstruction(processInstance.Id, i, instruction.Describe());
instruction.ProcessInstanceId = processInstance.Id;
instruction.SkipCustomListeners = modificationBuilder.SkipCustomListeners;
instruction.SkipIoMappings = modificationBuilder.SkipIoMappings;
instruction.Execute(commandContext);
}
if (!processInstance.HasChildren() && processInstance.IsEnded)
{
// process instance has ended regularly but this has not been propagated yet
// due to preserveScope setting
processInstance.PropagateEnd();
}
return(new ProcessInstanceWithVariablesImpl(processInstance, variablesListener.Variables));
}