Initial commit carried over from private repo. This is V2.

code/MessengerApi.Db/MessengerDbContext.cs

@@ -0,0 +1,26 @@
+using MessengerApi.Db.Converters;
+using MessengerApi.Db.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace MessengerApi.Db
+{
+    public abstract class MessengerDbContext : DbContext
+    {
+        public DbSet<User> Users { get; set; }
+
+        public DbSet<Message> Messages { get; set; }
+
+        public DbSet<UserRoute> UserRoutes { get; set; }
+
+        protected override void OnModelCreating(ModelBuilder modelBuilder)
+        {
+            base.OnModelCreating(modelBuilder);
+
+            modelBuilder.Entity<User>().HasKey(e => e.Id);
+            modelBuilder.Entity<Message>().HasKey(e => e.Id);
+            modelBuilder.Entity<Message>().Property(e => e.CreatedUtc).HasConversion<DateTimeAsUtcValueConverter>();
+            modelBuilder.Entity<Message>().Property(e => e.PayloadLifespanInSeconds).IsRequired();
+            modelBuilder.Entity<UserRoute>().HasKey(e => e.Id);
+        }
+    }
+}