/// <summary>
/// Adds a step to the job and connects it to the last step, if necessary.
/// </summary>
/// <param name="step"></param>
public void AddStep(JobStep step)
{
if (step is IDataSource source)
{
source.Output = new OutputPipeline();
}
var lastStep = steps.LastOrDefault();
ConnectAndAddStep(step, lastStep);
}
private void ConnectAndAddStep(JobStep step, JobStep sourceStep)
{
if (step is IDataSink)
{
if (!(sourceStep is IDataSource lastSource))
{
throw new InvalidOperationException($"Step {sourceStep.Id} must be a Data Source to be connected to {step.Id}.");
}
((IDataSink)step).Input = ((OutputPipeline)lastSource.Output).CreateInputPipeline();
}
steps.Add(step);
}
/// <summary>
/// Add a step to the job and connects it to <paramref name="sourceStepId"/>.
/// </summary>
/// <param name="step">The step to add.</param>
/// <param name="sourceStepId">The Id of the data source step.</param>
/// <exception cref="InvalidConfigurationException">sourceStepId doesn't exist.</exception>
public void AddStep(JobStep step, string sourceStepId)
{
if (step is null)
{
throw new ArgumentNullException(nameof(step));
}
var sourceStep = steps.FirstOrDefault(s => s.Id == sourceStepId);
if (sourceStep is null)
{
throw new InvalidConfigurationException($"Data Source step {sourceStepId} doesn't exist.");
}
if (!(sourceStep is IDataSource))
{
throw new InvalidConfigurationException($"Data Source Step {sourceStepId} is not a data source.");
}
if (!(step is IDataSink))
{
throw new InvalidConfigurationException($"Step {step.Id} is not a Data Sink.");
}
ConnectAndAddStep(step, sourceStep);
}