private ChainedWaterfall(ChainedWaterfall <TInput, TResult> current, IWaterfall <TInput, TResult> nextWaterfall)
{
if (nextWaterfall == null)
{
throw new ArgumentNullException(nameof(nextWaterfall));
}
_waterfall = new IWaterfall <TInput, TResult> [current._waterfall.Length + 1];
for (var index = 0; index < current._waterfall.Length; index++)
{
_waterfall[index] = current._waterfall[index];
}
_waterfall[current._waterfall.Length] = nextWaterfall;
}
/// <summary>
/// Default Ctor.
/// </summary>
/// <param name="waterfallHead">First link in the waterfall chain, i.e. execution will start at this waterfall.</param>
/// <param name="nextWaterfall">Next waterfall in the chain.</param>
public ChainedWaterfall(IWaterfall <TInput, TResult> waterfallHead, IWaterfall <TInput, TResult> nextWaterfall)
{
if (waterfallHead == null)
{
throw new ArgumentNullException(nameof(waterfallHead));
}
if (nextWaterfall == null)
{
throw new ArgumentNullException(nameof(nextWaterfall));
}
_waterfall = new IWaterfall <TInput, TResult> [2];
_waterfall[0] = waterfallHead;
_waterfall[1] = nextWaterfall;
}
/// <summary>
/// Default Ctor.
/// </summary>
/// <param name="firstWaterfall">Instance of waterfall</param>
/// <param name="anotherWaterfall">Another instance of waterfall</param>
public ConcurrentWaterfall(IWaterfall <TInput, TResult> firstWaterfall,
IWaterfall <TInput, TResult> anotherWaterfall)
{
if (firstWaterfall == null)
{
throw new ArgumentNullException(nameof(firstWaterfall));
}
if (anotherWaterfall == null)
{
throw new ArgumentNullException(nameof(anotherWaterfall));
}
_waterfall = new IWaterfall <TInput, TResult> [2];
_waterfall[0] = firstWaterfall;
_waterfall[1] = anotherWaterfall;
}
/// <summary>
/// Default Ctor.
/// </summary>
/// <param name="waterfall">Waterfall to execute. This can be enum/int based standalone waterfall OR
/// Chained/Concurrent waterfall.</param>
/// <param name="outcomeHandler">Outcome handler</param>
/// <param name="errorHandler">Error handler</param>
public WaterfallService(IWaterfall <TInput, TResult> waterfall, Action <TInput, TResult> outcomeHandler,
Action <TInput, TResult, Exception> errorHandler)
{
if (waterfall == null)
{
throw new ArgumentNullException(nameof(waterfall));
}
if (outcomeHandler == null)
{
throw new ArgumentNullException(nameof(outcomeHandler));
}
if (errorHandler == null)
{
throw new ArgumentNullException(nameof(errorHandler));
}
_waterfall = waterfall;
_outcomeHandler = outcomeHandler;
_errorHandler = errorHandler;
}
/// <summary>
/// Adds new waterfall in the collection to be executed in parallel
/// </summary>
/// <param name="anotherWaterfall">Waterfall to be added in the collection for parallel processing</param>
/// <returns>New instance of the class</returns>
public ConcurrentWaterfall <TInput, TResult> Add(IWaterfall <TInput, TResult> anotherWaterfall)
{
return(new ConcurrentWaterfall <TInput, TResult>(this, anotherWaterfall));
}
/// <summary>
/// Extends the chain by adding the given waterfall at the end of the existing chain.
/// </summary>
/// <param name="nextWaterfall">Waterfall to be added at the end of processing chain.</param>
/// <returns>New instance of the class</returns>
public ChainedWaterfall <TInput, TResult> Add(IWaterfall <TInput, TResult> nextWaterfall)
{
return(new ChainedWaterfall <TInput, TResult>(this, nextWaterfall));
}
