Added logger factory to worker and logging to activities (#26)

Signed-off-by: Keith Tenzer <ktenzer@keiths-mbp.lan>
Co-authored-by: Keith Tenzer <ktenzer@keiths-mbp.lan>

enterprise/Activities/TrainActivities.cs

@@ -2,6 +2,7 @@ using System.Net.Http.Json;
 using System.Text.Json;
 using Temporalio.Activities;
 using TrainSearchWorker.Models;
+using Microsoft.Extensions.Logging;
 
 namespace TrainSearchWorker.Activities;
 
@@ -23,6 +24,7 @@ public class TrainActivities
     [Activity]
     public async Task<JourneyResponse> SearchTrains(SearchTrainsRequest request)
     {
+        ActivityExecutionContext.Current.Logger.LogInformation($"SearchTrains from {request.From} to {request.To}");
         var response = await _client.GetAsync(
             $"api/search?from={Uri.EscapeDataString(request.From)}" +
             $"&to={Uri.EscapeDataString(request.To)}" +
@@ -30,17 +32,21 @@ public class TrainActivities
             $"&return_time={Uri.EscapeDataString(request.ReturnTime)}");
 
         response.EnsureSuccessStatusCode();
-
+      
         // Deserialize into JourneyResponse rather than List<Journey>
         var journeyResponse = await response.Content.ReadFromJsonAsync<JourneyResponse>(_jsonOptions)
                               ?? throw new InvalidOperationException("Received null response from API");
 
+        ActivityExecutionContext.Current.Logger.LogInformation("SearchTrains completed");
+
         return journeyResponse;
     }
 
     [Activity]
     public async Task<BookTrainsResponse> BookTrains(BookTrainsRequest request)
     {
+        ActivityExecutionContext.Current.Logger.LogInformation($"Booking trains with IDs: {request.TrainIds}");
+
         // Build the URL using the train IDs from the request
         var url = $"api/book/{Uri.EscapeDataString(request.TrainIds)}";
 
@@ -52,6 +58,8 @@ public class TrainActivities
         var bookingResponse = await response.Content.ReadFromJsonAsync<BookTrainsResponse>(_jsonOptions)
                               ?? throw new InvalidOperationException("Received null response from API");
 
+        ActivityExecutionContext.Current.Logger.LogInformation("BookTrains completed");
+
         return bookingResponse;
     }