I am working on a Xamarin project with Prism and DryIoC.
Currently I am setting up some custom environment-specific configuration, however I am struggling with the IoC syntax for this.
I have the following code as part of my App.xaml.cs:
private void SetConfiguration(IContainerRegistry containerRegistry)
{
// Get and deserialize config.json file from Configuration folder.
var embeddedResourceStream = Assembly.GetAssembly(typeof(IConfiguration)).GetManifestResourceStream("MyVismaMobile.Configurations.Configuration.config.json");
if (embeddedResourceStream == null)
return;
using (var streamReader = new StreamReader(embeddedResourceStream))
{
var jsonString = streamReader.ReadToEnd();
var configuration = JsonConvert.DeserializeObject<Configuration.Configuration>(jsonString);
What to do with configuration, in order to DI it?
}
What should I do with the configuration variable to inject it?
I have tried the following:
containerRegistry.RegisterSingleton<IConfiguration, Configuration>(c => configuration);
containerRegistry.Register<IConfiguration, Configuration>(c => configuration));
But the syntax is wrong with dryIoC.
RegisterSingleton and Register are meant for registering types where the container will then create the instances. You have your instance already, so you use
containerRegistry.RegisterInstance<IConfiguration>( configuration );
Instances are always singleton, obviously, so there's only no separate RegisterInstanceSingleton...
Related
I have a Blazor server project with Oracle Database. When I try to use the connection
"ConnectionStrings": {
"GTravelDbConnection": "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVER=dedicated)(SERVICE_NAME=XE)));User Id=GTRAVEL; Password=cteam;"
in appsettings.json and use in program.cs the following code
var builder = WebApplication.CreateBuilder(args);
var connectionString = builder.Configuration.GetConnectionString("GTravelDbConnection");
builder.Services.AddDbContext<GTravelDbContext>(
options => options.UseOracle(connectionString)
);
I get the error
No database provider has been configured for this DbContext. A provider can be configured by overriding the 'DbContext.OnConfiguring' method or by using 'AddDbContext' on the application service provider. If 'AddDbContext' is used, then also ensure that your DbContext type accepts a DbContextOptions object in its constructor and passes it to the base constructor for DbContext.
The same connection string if used from dbcontext class
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
optionsBuilder.UseOracle("Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVER=dedicated)(SERVICE_NAME=XE)));User Id=GTRAVEL; Password=cteam;");
}
}
works with no problem.
I would be obliged if someone could help me.
The problem was that I was trying to use a scoped service without creating a scope. When I used the following code in program.cs
var builder = WebApplication.CreateBuilder(args);
var connectionString = builder.Configuration.GetConnectionString("GTravelDbConnection");
builder.Services.AddDbContext<GTravelDbContext>(
options => options.UseOracle(connectionString)
);
builder.Services.AddScoped<ICustomerService, CustomerService>();
using (var serviceScope = app.Services.CreateScope())
{
var services = serviceScope.ServiceProvider;
var customerService = services.GetRequiredService<ICustomerService>();
}
it all worked perfectly.
Thank you
Is there any way to configure a bot in the new Microsoft Bot Framework v4 without the .bot file?
I want to do this programatically and I cannot find this in the samples.
The appsettings.json points to the bot file like this:
{
"botFilePath": "BotConfiguration.bot",
"botFileSecret": ""
}
then in the startup.cs this happens:
var secretKey = Configuration.GetSection("botFileSecret")?.Value;
var botFilePath = Configuration.GetSection("botFilePath")?.Value;
// Loads .bot configuration file and adds a singleton that your Bot can access through dependency injection.
var botConfig = BotConfiguration.Load(botFilePath ?? #".\BotConfiguration.bot", secretKey);
services.AddSingleton(sp => botConfig ?? throw new InvalidOperationException($"The .bot config file could not be loaded. ({botConfig})"));
// Retrieve current endpoint.
var environment = _isProduction ? "production" : "development";
var service = botConfig.Services.Where(s => s.Type == "endpoint" && s.Name == environment).FirstOrDefault();
You will need to make changes to this if you wish to handle things without a .bot file.
I'm trying to protect my webapi with IdentityServer and OpenID Connect using Autofac. I'm using OWIN. But for some reason I can't get claims of the user. It seems that AccessTokenValidation is not triggered at all. That makes me think there is something wrong in the order of my declarations at my startup. Here is my startup.
public class Startup {
public void Configuration(IAppBuilder appBuilder) {
// Add authentication
this.AddAuthentication(appBuilder);
HttpConfiguration config = new HttpConfiguration();
var container = CreateAutofacContainer();
var resolver = new AutofacWebApiDependencyResolver(container);
config.DependencyResolver = resolver;
WebApiConfig.Register(config);
config.EnsureInitialized();
// Register config - you can't add anything to pipeline after this
appBuilder.UseAutofacMiddleware(container);
appBuilder.UseAutofacWebApi(config);
appBuilder.UseWebApi(config);
}
private static IContainer CreateAutofacContainer() {
var autofacBuilder = new ContainerBuilder();
var assembly = Assembly.GetExecutingAssembly();
// Register your Web API controllers.
autofacBuilder.RegisterApiControllers(assembly);
// For general logging implementation
autofacBuilder.RegisterType<ConsoleLogger>().As<ILogger>();
// Create empty usage context to be filled in OWIN pipeline
IUsageContext usageContext = new RuntimeUsageContext();
autofacBuilder.RegisterInstance(usageContext).As<IUsageContext>().SingleInstance();
// We need to get usage context builded
autofacBuilder.RegisterType<OIDCUsageContextProvider>().InstancePerRequest();
var container = autofacBuilder.Build();
return container;
}
private void AddAuthentication(IAppBuilder app) {
var options = new IdentityServerBearerTokenAuthenticationOptions();
options.Authority = "MYAUTHORITY";
options.RequiredScopes = new[] { "openid", "profile", "email", "api" };
options.ValidationMode = ValidationMode.ValidationEndpoint;
app.UseIdentityServerBearerTokenAuthentication(options);
// Add local claims if needed
app.UseClaimsTransformation(incoming => {
// either add claims to incoming, or create new principal
var appPrincipal = new ClaimsPrincipal(incoming);
// incoming.Identities.First().AddClaim(new Claim("appSpecific", "some_value"));
return Task.FromResult(appPrincipal);
});
}
I'm using hybrid flow and api is called from SPA-application. I've verified (by calling my identity server's endpoint directly) that access token is valid and there are claims available. I also downloaded IdentityServer.AccessTokenValidation project and attached it as a reference. When I set some breakpoints to methods in that project, they never get called. That is why I think there is something wrong with my startup and OWIN pipeline.
I've declared UsageContext in my startup. It is a class I'm using to collect claims and some configuration settings - to be injected to actual controllers. I think it would be nice way to handle this, so in controllers there is always valid UsageContext available.
I've read a lot of samples and examples but still haven't found exactly same situation. I'll appreciate any attempts to point me into right direction.
Regards,
Borre
Could it be your registration of UsageContext as a Singleton? You mention this class contains claims, so this object should be resolved once pr http request - shouldn't it?
It turned out that there was some mysterious line in AccessTokenValidation - library that didn't work. I use that library to get claims. After changing the line everything seemed to work.
So basically my question is closed now and stuff works. But I'm still not totally convinced this is the right way to do this.
Thanks John for your comments!
I'm sending an email from my ASP.NET MVC app using the Spark View Engine based on this example by Andrew Kharlamov.
I've setup a unit test, CanSendEmail, but I need to specify the viewfolder in the config.
I found the documentation here and the examples give this:
<spark>
<views>
<add name="{any-unique-name}"
folderType="FileSystem|EmbeddedResource|VirtualPathProvider|Custom"
type="{name, assembly of IViewFolder type}"
constuctor-param-names="values"
subfolder="{optional subfolder to target}"/>
</views>
</spark>
My question is this. Which folderType do I use and do I need any other parameters. My test product is call myProject.Tests and my web project containing the views is called myProject.Web with a Views folder in it.
Do I use FileSystem, VirtualPathProvider ... ?
Edit [14/11/2011]:
Okay I've got this in my app.config in myProject.Tests:
<views>
<add name="web-view-folder"
folderType="VirtualPathProvider"
virtualBaseDir="~/Views"/>
</views>
I still get "View source file not found." when I run my test. I want the test to use the Views in myproject.Web.
My Solution
Based on the blog posts here and here, and with help from #RobertTheGrey and looking at the tests in the Spark source code, I ended up using ViewFolderType.FileSystem. That worked.
Here's the my code under test:
public string RenderEmailWithCustomViewFolder(string sparkViewName, ViewDataDictionary viewData, Dictionary<string, string> viewFolderParameters)
{
var settings = new SparkSettings()
.SetPageBaseType(typeof (SparkView))
.AddViewFolder(ViewFolderType.FileSystem, viewFolderParameters)
.AddAssembly("MvcContrib");
var engine = new SparkViewEngine(settings);
var sparkViewDescriptor = new SparkViewDescriptor().AddTemplate(sparkViewName);
var view = (SparkView)engine.CreateInstance(sparkViewDescriptor);
try
{
// Merge view data
viewData.Keys.ToList().ForEach(x => view.ViewData[x] = viewData[x]);
// Render the view to a text writer
var writer = new StringWriter();
view.RenderView(writer);
return writer.ToString();
}
finally
{
engine.ReleaseInstance(view);
}
}
And here's my test:
[Test]
public void Can_Render_Order_Confirmation_Email_With_Spark_View_Engine()
{
// Arrange
var order = OrderInstanceFactory.CreateTestOrder();
order.ContactEmail = "test#testicle.com";
var emailService = new EmailService();
var viewData = new ViewDataDictionary();
viewData["Order"] = order;
const string viewFolder = #"../../../../app/myProject.Web/Views";
var viewFolderParameters = new Dictionary<string, string> {{"basePath", viewFolder}};
// Act
var emailBody = emailService.RenderEmailWithCustomViewFolder("Email/OrderConfirmation.spark", viewData, viewFolderParameters);
// Assert
Assert.IsNotNull(emailBody);
Assert.IsTrue(emailBody.Contains("test#testicle.com"));
}
My OrderConfirmation.spark template lives in my web products in the Views/Email/.
If it's an ASP.NET MVC app, then you can use VirtualPathProvider since that hooks into the HttpContext and the rest of the runtime. You would use a FileSystemProvider if you were runnig it from a console app for example, or if you wanted to add a folder from outside your web app, perhaps because the templates were shared by other apps, but I've rarely seen that done.
Hope that helps...
We are trying to migrate to use Microsoft Enterprise Library - Caching block. However, cache manager initialization seems to be pretty tied to the config file entries and our application creates inmemory "containers" on the fly. Is there anyway by which an instance of cache manager can be instantiated on the fly using pre-configured set of values (inmemory only).
Enterprise Library 5 has a fluent configuration which makes it easy to programmatically configure the blocks. For example:
var builder = new ConfigurationSourceBuilder();
builder.ConfigureCaching()
.ForCacheManagerNamed("MyCache")
.WithOptions
.UseAsDefaultCache()
.StoreInIsolatedStorage("MyStore")
.EncryptUsing.SymmetricEncryptionProviderNamed("MySymmetric");
var configSource = new DictionaryConfigurationSource();
builder.UpdateConfigurationWithReplace(configSource);
EnterpriseLibraryContainer.Current
= EnterpriseLibraryContainer.CreateDefaultContainer(configSource);
Unfortunately, it looks like you need to configure the entire block at once so you wouldn't be able to add CacheManagers on the fly. (When I call ConfigureCaching() twice on the same builder an exception is thrown.) You can create a new ConfigurationSource but then you lose your previous configuration. Perhaps there is a way to retrieve the existing configuration, modify it (e.g. add a new CacheManager) and then replace it? I haven't been able to find a way.
Another approach is to use the Caching classes directly.
The following example uses the Caching classes to instantiate two CacheManager instances and stores them in a static Dictionary. No configuration required since it's not using the container. I'm not sure it's a great idea -- it feels a bit wrong to me. It's pretty rudimentary but hopefully helps.
public static Dictionary<string, CacheManager> caches = new Dictionary<string, CacheManager>();
static void Main(string[] args)
{
IBackingStore backingStore = new NullBackingStore();
ICachingInstrumentationProvider instrProv = new CachingInstrumentationProvider("myInstance", false, false,
new NoPrefixNameFormatter());
Cache cache = new Cache(backingStore, instrProv);
BackgroundScheduler bgScheduler = new BackgroundScheduler(new ExpirationTask(null, instrProv), new ScavengerTask(0,
int.MaxValue, new NullCacheOperation(), instrProv), instrProv);
CacheManager cacheManager = new CacheManager(cache, bgScheduler, new ExpirationPollTimer(int.MaxValue));
cacheManager.Add("test1", "value1");
caches.Add("cache1", cacheManager);
cacheManager = new CacheManager(new Cache(backingStore, instrProv), bgScheduler, new ExpirationPollTimer(int.MaxValue));
cacheManager.Add("test2", "value2");
caches.Add("cache2", cacheManager);
Console.WriteLine(caches["cache1"].GetData("test1"));
Console.WriteLine(caches["cache2"].GetData("test2"));
}
public class NullCacheOperation : ICacheOperations
{
public int Count { get { return 0; } }
public Hashtable CurrentCacheState { get { return new System.Collections.Hashtable(); } }
public void RemoveItemFromCache(string key, CacheItemRemovedReason removalReason) {}
}
If expiration and scavenging policies are the same perhaps it might be better to create one CacheManager and then use some intelligent key names to represent the different "containers". E.g. the key name could be in the format "{container name}:{item key}" (assuming that a colon will not appear in a container or key name).
You can using UnityContainer:
IUnityContainer unityContainer = new UnityContainer();
IContainerConfigurator configurator = new UnityContainerConfigurator(unityContainer);
configurator.ConfigureCache("MyCache1");
IContainerConfigurator configurator2 = new UnityContainerConfigurator(unityContainer);
configurator2.ConfigureCache("MyCache2");
// here you can access both MyCache1 and MyCache2:
var cache1 = unityContainer.Resolve<ICacheManager>("MyCache1");
var cache2 = unityContainer.Resolve<ICacheManager>("MyCache2");
And this is an extension class for IContainerConfigurator:
public static void ConfigureCache(this IContainerConfigurator configurator, string configKey)
{
ConfigurationSourceBuilder builder = new ConfigurationSourceBuilder();
DictionaryConfigurationSource configSource = new DictionaryConfigurationSource();
// simple inmemory cache configuration
builder.ConfigureCaching().ForCacheManagerNamed(configKey).WithOptions.StoreInMemory();
builder.UpdateConfigurationWithReplace(configSource);
EnterpriseLibraryContainer.ConfigureContainer(configurator, configSource);
}
Using this you should manage an static IUnityContainer object and can add new cache, as well as reconfigure existing caching setting anywhere you want.