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));
}
public virtual object Execute(CommandContext commandContext)
{
var processInstanceId = Builder.ProcessInstanceId;
IExecutionManager executionManager = commandContext.ExecutionManager;
ExecutionEntity processInstance = executionManager.FindExecutionById(processInstanceId);
CheckUpdateProcessInstance(processInstance, commandContext);
processInstance.PreserveScope = true;
var instructions = Builder.ModificationOperations;
for (var i = 0; i < instructions.Count; i++)
{
var instruction = instructions[i];
Log.DebugModificationInstruction(processInstanceId, i + 1, instruction.Describe());
instruction.SkipCustomListeners = Builder.SkipCustomListeners;
instruction.SkipIoMappings = Builder.SkipIoMappings;
instruction.Execute(commandContext);
}
processInstance = executionManager.FindExecutionById(processInstanceId);
if (!processInstance.HasChildren())
{
if (processInstance.Activity == null)
{
// process instance was cancelled
CheckDeleteProcessInstance(processInstance, commandContext);
DeletePropagate(processInstance, "Cancellation due to process instance modification",
Builder.SkipCustomListeners, Builder.SkipIoMappings);
}
else if (processInstance.IsEnded)
{
// process instance has ended regularly
processInstance.PropagateEnd();
}
}
commandContext.OperationLogManager.LogProcessInstanceOperation(LogEntryOperation, processInstanceId, null,
null, new List <PropertyChange>()
{
PropertyChange.EmptyChange
});
return(null);
}
protected internal virtual ExecutionEntity GetScopeExecutionForActivityInstance(ExecutionEntity processInstance,
ActivityExecutionTreeMapping mapping, IActivityInstance activityInstance)
{
EnsureUtil.EnsureNotNull("activityInstance", activityInstance);
ProcessDefinitionImpl processDefinition = processInstance.ProcessDefinition;
ScopeImpl scope = GetScopeForActivityInstance(processDefinition, activityInstance);
ISet <ExecutionEntity> executions = mapping.GetExecutions(scope);
ISet <string> activityInstanceExecutions = new HashSet <string>(activityInstance.ExecutionIds);
// TODO: this is a hack around the activity instance tree
// remove with fix of CAM-3574
foreach (var activityInstanceExecutionId in activityInstance.ExecutionIds)
{
ExecutionEntity execution = context.Impl.Context.CommandContext.ExecutionManager.FindExecutionById(activityInstanceExecutionId);
if (execution.IsConcurrent && execution.HasChildren())
{
// concurrent executions have at most one child
IActivityExecution child = execution.executions.First();//.Executions[0];
activityInstanceExecutions.Add(child.Id);
}
}
// find the scope execution for the given activity instance
ISet <ExecutionEntity> retainedExecutionsForInstance = new HashSet <ExecutionEntity>();
foreach (ExecutionEntity execution in executions)
{
if (activityInstanceExecutions.Contains(execution.Id))
{
retainedExecutionsForInstance.Add(execution);
}
}
if (retainedExecutionsForInstance.Count != 1)
{
throw new ProcessEngineException("There are " + retainedExecutionsForInstance.Count +
" (!= 1) executions for activity instance " + activityInstance.Id);
}
return(retainedExecutionsForInstance.GetEnumerator().Current);
}
public override object Execute(CommandContext commandContext)
{
ExecutionEntity processInstance = commandContext.ExecutionManager.FindExecutionById(processInstanceId);
ProcessDefinitionImpl processDefinition = processInstance.GetProcessDefinition();
CoreModelElement elementToInstantiate = GetTargetElement(processDefinition);
EnsureUtil.EnsureNotNull(typeof(NotValidException), DescribeFailure("Element '" + TargetElementId + "' does not exist in process '" + processDefinition.Id + "'"), "element", elementToInstantiate);
// rebuild the mapping because the execution tree changes with every iteration
var mapping = new ActivityExecutionTreeMapping(commandContext, processInstanceId);
// before instantiating an activity, two things have to be determined:
//
// activityStack:
// For the activity to instantiate, we build a stack of parent flow scopes
// for which no executions exist yet and that have to be instantiated
//
// scopeExecution:
// This is typically the execution under which a new sub tree has to be created.
// if an explicit ancestor activity instance is set:
// - this is the scope execution for that ancestor activity instance
// - throws exception if that scope execution is not in the parent hierarchy
// of the activity to be started
// if no explicit ancestor activity instance is set:
// - this is the execution of the first parent/ancestor flow scope that has an execution
// - throws an exception if there is more than one such execution
var targetFlowScope = GetTargetFlowScope(processDefinition);
// prepare to walk up the flow scope hierarchy and collect the flow scope activities
var stackCollector = new ActivityStackCollector();
var walker = new FlowScopeWalker(targetFlowScope);
walker.AddPreVisitor(stackCollector);
ExecutionEntity scopeExecution = null;
// if no explicit ancestor activity instance is set
if (ReferenceEquals(AncestorActivityInstanceId, null))
{
// walk until a scope is reached for which executions exist
walker.WalkWhile((element) => mapping.GetExecutions(element)
.Count > 0 || element == processDefinition);
var flowScopeExecutions = mapping.GetExecutions(walker.CurrentElement);
if (flowScopeExecutions.Count > 1)
{
throw new ProcessEngineException("Ancestor activity execution is ambiguous for activity " +
targetFlowScope);
}
//scopeExecution = flowScopeExecutions.GetEnumerator().Next();
scopeExecution = flowScopeExecutions.First();
}
var activitiesToInstantiate = stackCollector.ActivityStack;
activitiesToInstantiate.Reverse();
// We have to make a distinction between
// - "regular" activities for which the activity stack can be instantiated and started
// right away
// - interrupting or cancelling activities for which we have to ensure that
// the interruption and cancellation takes place before we instantiate the activity stack
ActivityImpl topMostActivity = null;
ScopeImpl flowScope = null;
if (activitiesToInstantiate.Count > 0)
{
topMostActivity = (ActivityImpl)activitiesToInstantiate[0];
flowScope = topMostActivity.FlowScope;
}
else if (elementToInstantiate is ActivityImpl)
{
topMostActivity = (ActivityImpl)elementToInstantiate;
flowScope = topMostActivity.FlowScope;
}
else if (elementToInstantiate is TransitionImpl)
{
var transitionToInstantiate = (TransitionImpl)elementToInstantiate;
flowScope = transitionToInstantiate.Source.FlowScope;
}
if (!SupportsConcurrentChildInstantiation(flowScope))
{
throw new ProcessEngineException("Concurrent instantiation not possible for " + "activities in scope " +
flowScope.Id);
}
var startBehavior = ActivityStartBehavior.ConcurrentInFlowScope;
if (topMostActivity != null)
{
startBehavior = topMostActivity.ActivityStartBehavior;
if (activitiesToInstantiate.Count > 0)
{
// this is in BPMN relevant if there is an interrupting event sub process.
// we have to distinguish between instantiation of the start event and any other activity.
// instantiation of the start event means interrupting behavior; instantiation
// of any other ITask means no interruption.
IPvmActivity initialActivity = topMostActivity.Properties.Get(BpmnProperties.InitialActivity);
IPvmActivity secondTopMostActivity = null;
if (activitiesToInstantiate.Count > 1)
{
secondTopMostActivity = activitiesToInstantiate[1];
}
else if (elementToInstantiate.GetType().IsSubclassOf(typeof(ActivityImpl)))
{
secondTopMostActivity = (IPvmActivity)elementToInstantiate;
}
if (initialActivity != secondTopMostActivity)
{
startBehavior = ActivityStartBehavior.ConcurrentInFlowScope;
}
}
}
//throw new Exception("startBehavior值："+(int)startBehavior);//2
switch (startBehavior)
{
case ActivityStartBehavior.CancelEventScope:
{
ScopeImpl scopeToCancel = (ScopeImpl)topMostActivity.EventScope;
var executionToCancel = GetSingleExecutionForScope(mapping, scopeToCancel);
if (executionToCancel != null)
{
executionToCancel.DeleteCascade("Cancelling activity " + topMostActivity + " executed.",
skipCustomListeners, skipIoMappings);
Instantiate(executionToCancel.Parent, activitiesToInstantiate, elementToInstantiate);
}
else
{
var flowScopeExecution = GetSingleExecutionForScope(mapping, topMostActivity.FlowScope);
InstantiateConcurrent(flowScopeExecution, activitiesToInstantiate, elementToInstantiate);
}
break;
}
case ActivityStartBehavior.InterruptEventScope:
{
ScopeImpl scopeToCancel = (ScopeImpl)topMostActivity.EventScope;
var executionToCancel = GetSingleExecutionForScope(mapping, scopeToCancel);
executionToCancel.Interrupt("Interrupting activity " + topMostActivity + " executed.",
skipCustomListeners, skipIoMappings);
executionToCancel.SetActivity(null);
executionToCancel.LeaveActivityInstance();
Instantiate(executionToCancel, activitiesToInstantiate, elementToInstantiate);
break;
}
case ActivityStartBehavior.InterruptFlowScope:
{
var scopeToCancel = topMostActivity.FlowScope;
var executionToCancel = GetSingleExecutionForScope(mapping, scopeToCancel);
executionToCancel.Interrupt("Interrupting activity " + topMostActivity + " executed.",
skipCustomListeners, skipIoMappings);
executionToCancel.SetActivity(null);
executionToCancel.LeaveActivityInstance();
Instantiate(executionToCancel, activitiesToInstantiate, elementToInstantiate);
break;
}
default:
{
// if all child executions have been cancelled
// or this execution has ended executing its scope, it can be reused
if (!scopeExecution.HasChildren() && (scopeExecution.GetActivity() == null || scopeExecution.IsEnded))
{
// reuse the scope execution
Instantiate(scopeExecution, activitiesToInstantiate, elementToInstantiate);
}
else
{
// if the activity is not cancelling/interrupting, it can simply be instantiated as
// a concurrent child of the scopeExecution
InstantiateConcurrent(scopeExecution, activitiesToInstantiate, elementToInstantiate);
}
break;
}
}
return(null);
}
