Question

I want to make small framework with i could simply invoke webservices on many computers that have webservice.

So, i have i.e five computers with webservices.
Each ws provides 2 functions (could be more, but this is example):
DataFormat[] GetXData(int)
Something[] GetYData(string, int).

Invoking service now looks like this:
ServiceClient wsc;
DataFormat[] data = wsc.GetXData(5);

I plan interface of framework like this:

MultiWebservice mws;
DataFormat[] data = mws.BroadcastQuery( wsc.GetXData(5) );

As can see, i wish to inject function with iam interested to fire on every ws. And return merged data (merging is not subject of post. i handle it myself)

I need a help how use C# to make this elegant, generic and if it isn’t necessary,
without many overloading of function because i don’t want make new overloadings for each different return type or
each function in ws.

Please, give me advice. Maybe this interface is wrong and could be better.

Answer 1

To give an answer similar to Thomas Li’s, but using a generic type parameter for the methods, to allow any return type:

 public class WSClient {
      public int GetPower (int var) { return var * var; }
      public int[] GetDuplicatePowers (int var) {
              return new[] { GetPower(var), GetPower (var) };
      }
 }

 public class Multiplexer<T> {
      IList<T> _sources;
      public Multiplexer (IEnumerable<T> sources) {
             _sources = new List<T> (sources);
      }

      public IEnumerable<TResult> Call<TResult> (Func<T, TResult> func) {
          return _sources.Select (s => func(s));
      }

      public IEnumerable<TResult> AggregateCall<TResult> (Func<T, IEnumerable<TResult>> func) {
          return _sources.SelectMany (s => func(s));
      }
 }

 public class Test {
     public static void Main (string[] args) {
           var m = new Multiplexer<WSClient> (new[] { new WSClient (), new WSClient () });
           var powers = m.Call (c => c.GetPower (2));
           var agg_powers = m.AggregateCall (c => c.GetDuplicatePowers (2));
     }
 }