public void Configuration(Owin.IAppBuilder app)
{
// using Owin; you can use UseRequestScopeContext extension method.
// enabled timing is according to Pipeline.
// so I recommend enable as far in advance as possible.
app.UseRequestScopeContext();
app.UseErrorPage();
app.Run(async _ =>
{
// get global context like HttpContext.Current.
var context = OwinRequestScopeContext.Current;
// Environment is raw Owin Environment as IDictionary<string, object>.
var __ = context.Environment;
// optional:If you want to change Microsoft.Owin.OwinContext, you can wrap.
new Microsoft.Owin.OwinContext(context.Environment);
// Timestamp is request started(correctly called RequestScopeContextMiddleware timing).
var ___ = context.Timestamp;
// Items is IDictionary<string, object> like HttpContext#Items.
// Items is threadsafe(as ConcurrentDictionary) by default.
var ____ = context.Items;
// DisposeOnPipelineCompleted can register dispose when request finished(correctly RequestScopeContextMiddleware underling Middlewares finished)
// return value is cancelToken. If call token.Dispose() then canceled register.
var cancelToken = context.DisposeOnPipelineCompleted(new TraceDisposable());
// OwinRequestScopeContext over async/await also ConfigureAwait(false)
context.Items["test"] = "foo";
await Task.Delay(TimeSpan.FromSeconds(1)).ConfigureAwait(false);
var _____ = OwinRequestScopeContext.Current.Items["test"]; // foo
await Task.Run(() =>
{
// OwinRequestScopeContext over new thread/threadpool.
var ______ = OwinRequestScopeContext.Current.Items["test"]; // foo
});
_.Response.ContentType = "text/plain";
await _.Response.WriteAsync("Hello OwinRequestScopeContext! => ");
await _.Response.WriteAsync(OwinRequestScopeContext.Current.Items["test"] as string); // render foo
});
}
public void Configuration(Owin.IAppBuilder app)
{
// enable RedisSession Middleware.
// RedisSession
app.UseRedisSession(new RedisSessionOptions(new RedisSettings("127.0.0.1")));
app.Run(async context => // request begin, Get all values from Redis server.
{
// take session from owin environment(IDictionary<string, object>)
var session = context.Environment.AsRedisSession();
// TryGet(or Get) take from local storage.
DateTime lastAccess;
int accessCount = 1;
if (session.TryGet<DateTime>("LastAccess", out lastAccess) && session.TryGet<int>("Counter", out accessCount))
{
accessCount++;
await context.Response.WriteAsync("AccessCount " + accessCount);
await context.Response.WriteAsync(", LastAccess from RedisSession => " + lastAccess.ToString());
}
else
{
await context.Response.WriteAsync("First Access");
}
// Set(or Remove) set to local storage and enqueue operation.
session.Set("Counter", accessCount);
session.Set("LastAccess", DateTime.Now);
context.Response.ContentType = "text/plain";
}); // request end, queued set(or delete) values to Redis server.
// context save pattern, can take everywhere.
//app.UseRequestScopeContext();
//app.UseRedisSession(new RedisSessionOptions(new RedisSettings("127.0.0.1")));
//app.Run(async context =>
//{
// Store();
// int v = -1;
// context.Environment.AsRedisSession().TryGet<int>("test", out v);
// context.Response.ContentType = "text/plain";
// await context.Response.WriteAsync(v.ToString());
//});
}
