/// <summary>
/// Deals with the next operation, if it is an <see cref="AtomicOperation"/> it is executed,
/// if it is a <see cref="CompositeOperation"/> its single operations are pushed on the execution stack.
/// </summary>
/// <remarks>If an error occurs during the execution the operation is aborted and the operation
/// is pushed on the stack again.<br/>
/// If the execution was successful <see cref="EngineBase.OnOperationExecuted"/> is called.</remarks>
protected virtual void ProcessNextOperation(bool logOperations, CancellationToken cancellationToken)
{
IAtomicOperation atomicOperation = CurrentOperation as IAtomicOperation;
OperationCollection operations = CurrentOperation as OperationCollection;
if (atomicOperation != null && operations != null)
throw new InvalidOperationException("Current operation is both atomic and an operation collection");
if (atomicOperation != null) {
if (logOperations)
Log.LogMessage(string.Format("Performing atomic operation {0}", Utils.Name(atomicOperation)));
PerformAtomicOperation(atomicOperation, cancellationToken);
} else if (operations != null) {
if (logOperations)
Log.LogMessage("Expanding operation collection");
ExecutionStack.AddRange(operations.Reverse());
CurrentOperation = null;
} else if (ExecutionStack.Count > 0) {
if (logOperations)
Log.LogMessage("Popping execution stack");
CurrentOperation = ExecutionStack.Last();
ExecutionStack.RemoveAt(ExecutionStack.Count - 1);
} else {
if (logOperations)
Log.LogMessage("Nothing to do");
}
OperatorTrace.Regenerate(CurrentAtomicOperation);
}
public OperationContent(IOperation operation)
{
Operation = operation;
Collection = operation as OperationCollection;
AtomicOperation = operation as IAtomicOperation;
ExecutionContext = operation as ExecutionContext;
if (AtomicOperation != null)
{
Name = Utils.Name(AtomicOperation);
if (AtomicOperation.Operator != null && AtomicOperation.Operator.Breakpoint)
{
Icon = VSImageLibrary.BreakpointActive;
}
else
{
Icon = VSImageLibrary.Method;
}
}
else if (Collection != null)
{
Name = string.Format("{0} Operations", Collection.Count);
Icon = VSImageLibrary.Module;
}
else
{
Name = "";
Icon = VSImageLibrary.Nothing;
}
}
