public DbContext([NotNull] ImmutableDbContextOptions configuration)
{
Check.NotNull(configuration, "configuration");
InitializeSets(null, configuration);
_configuration = new LazyRef <DbContextConfiguration>(() => Initialize(null, configuration));
}
public DbContext([NotNull] IServiceProvider serviceProvider, [NotNull] ImmutableDbContextOptions configuration)
{
Check.NotNull(serviceProvider, "serviceProvider");
Check.NotNull(configuration, "configuration");
InitializeSets(serviceProvider, configuration);
_configuration = new LazyRef <DbContextConfiguration>(() => Initialize(serviceProvider, configuration));
}
private DbContextConfiguration Initialize(IServiceProvider serviceProvider, ImmutableDbContextOptions contextOptions)
{
var providerSource = serviceProvider != null
? DbContextConfiguration.ServiceProviderSource.Explicit
: DbContextConfiguration.ServiceProviderSource.Implicit;
serviceProvider = serviceProvider ?? ServiceProviderCache.Instance.GetOrAdd(contextOptions);
_scopedServiceProvider = serviceProvider
.GetService <IServiceScopeFactory>()
.CreateScope()
.ServiceProvider;
return(_scopedServiceProvider
.GetService <DbContextConfiguration>()
.Initialize(serviceProvider, _scopedServiceProvider, contextOptions, this, providerSource));
}
public virtual IServiceProvider GetOrAdd(ImmutableDbContextOptions contextOptions)
{
var services = new ServiceCollection();
var builder = services.AddEntityFramework();
foreach (var extension in contextOptions.Extensions)
{
extension.ApplyServices(builder);
}
// TODO: Consider more robust hashing algorithm
// Note that no cryptographic algorithm is available on all of phone/store/k/desktop
unchecked
{
var key = services.Aggregate(0, (t, d) => (t * 397) ^ CalculateHash(d).GetHashCode());
return(_configurations.GetOrAdd(key, k => services.BuildServiceProvider()));
}
}
private void InitializeSets(IServiceProvider serviceProvider, ImmutableDbContextOptions contextOptions)
{
serviceProvider = serviceProvider ?? ServiceProviderCache.Instance.GetOrAdd(contextOptions);
serviceProvider.GetRequiredService <DbSetInitializer>().InitializeSets(this);
}