public static IObservable <T> TraceOnCompleted <T>(this IObservable <T> source, string message)
{
Contract.Requires(source != null);
Contract.Requires(message != null);
Contract.Ensures(Contract.Result <IObservable <T> >() != null);
return(source.Do(new TraceObserver <T>(_ => null, TraceDefaults.GetMessageOnCompleted(message))));
}
/// <summary>
/// Constructs a new instance of the <see cref="TraceObserver{T}" /> class for tracing OnNext, OnError and OnCompleted
/// calls.
/// </summary>
/// <param name="nextFormat">The format in which values will be traced. A single replacement token {0} is supported.</param>
/// <param name="errorFormat">The format in which the error will be traced. A single replacement token {0} is supported.</param>
/// <param name="completedMessage">The message to be traced for the completed notification.</param>
public TraceObserver(string nextFormat, string errorFormat, string completedMessage)
: this(TraceDefaults.GetFormatOnNext <T>(nextFormat), TraceDefaults.GetFormatOnError(errorFormat),
TraceDefaults.GetMessageOnCompleted(completedMessage))
{
Contract.Requires(nextFormat != null);
Contract.Requires(errorFormat != null);
Contract.Requires(completedMessage != null);
}
public static IEnumerable <T> TraceOnCompleted <T>(this IEnumerable <T> source, TraceSource trace, string message)
{
Contract.Requires(source != null);
Contract.Requires(trace != null);
Contract.Requires(message != null);
Contract.Ensures(Contract.Result <IEnumerable <T> >() != null);
var enumerable = source.Do(new TraceObserver <T>(trace, _ => null, TraceDefaults.GetMessageOnCompleted(message)));
Contract.Assume(enumerable != null);
return(enumerable);
}