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Example Event Store SignalR publisher. For real-time push of events to a web page.
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| using System; | |
| using System.Net; | |
| using System.Text; | |
| using System.Threading.Tasks; | |
| using EventStore.ClientAPI; | |
| using Microsoft.AspNet.SignalR; | |
| using Microsoft.Owin.Hosting; | |
| using Owin; | |
| namespace EventStoreSignalR | |
| { | |
| class Program | |
| { | |
| static void Main(string[] args) | |
| { | |
| var esClient = EventStore.ClientAPI.EventStoreConnection.Create(); | |
| esClient.Connect(new IPEndPoint(IPAddress.Loopback,1113)); | |
| using (WebApplication.Start<Startup>("http://localhost:8081")) | |
| { | |
| Console.WriteLine("SignalR Server running."); | |
| esClient.SubscribeToAll(true,SendToClient); | |
| Console.ReadLine(); | |
| } | |
| } | |
| public static void SendToClient(ResolvedEvent e) | |
| { | |
| var groupName = e.OriginalStreamId; | |
| var context = GlobalHost.ConnectionManager.GetHubContext<EventStoreHub>(); | |
| var theGroup = context.Clients.Group(groupName); | |
| var data = Encoding.UTF8.GetString(e.OriginalEvent.Data); | |
| var metadata = Encoding.UTF8.GetString(e.OriginalEvent.Metadata); | |
| theGroup.handleEvent(new | |
| { | |
| eventId = e.OriginalEvent.EventId, | |
| eventNumber = e.OriginalEvent.EventNumber, | |
| eventStreamId = e.OriginalEvent.EventStreamId, | |
| eventType = e.OriginalEvent.EventType, | |
| data, | |
| metadata | |
| }); | |
| } | |
| } | |
| class Startup | |
| { | |
| public void Configuration(IAppBuilder app) | |
| { | |
| var config = new HubConfiguration { EnableCrossDomain = true }; | |
| app.MapHubs(config); | |
| } | |
| } | |
| public class EventStoreHub : Hub | |
| { | |
| public Task Subscribe(string streamName) | |
| { | |
| return Groups.Add(Context.ConnectionId, streamName); | |
| } | |
| public Task Unsubscribe(string streamName) | |
| { | |
| return Groups.Remove(Context.ConnectionId, streamName); | |
| } | |
| } | |
| } |
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| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> | |
| <title>SignalR Test</title> | |
| <script type="text/javascript" src="./jquery.min.js"></script> | |
| <script type="text/javascript" src="./jquery.signalR.min.js"></script> | |
| <script type="text/javascript" src="http://localhost:8081/signalr/hubs"></script> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| $.connection.hub.url = "http://localhost:8081/signalr"; | |
| var eventStoreHub = $.connection.eventStoreHub; | |
| $.connection.hub.start() | |
| .done(function() { | |
| $("body").append("Connected!"); | |
| }) | |
| .fail(function(ex) {alert("failed to connect!" + JSON.stringify(ex));}); | |
| eventStoreHub.client.handleEvent = function (event) { | |
| $("body").append("<pre>" + JSON.stringify(event) + "</pre>"); | |
| } | |
| function subscribe() { | |
| var streamName = $("#streamName").val(); | |
| eventStoreHub.server.subscribe(streamName) | |
| .done(function() { | |
| alert("subscribed."); | |
| }) | |
| .fail(function() { | |
| alert("subscribing failed"); | |
| }); | |
| } | |
| function unsubscribe() { | |
| var streamName = $("#streamName").val(); | |
| eventStoreHub.server.unsubscribe(streamName) | |
| .done(function() { | |
| alert("unsubscribed."); | |
| }) | |
| .fail(function() { | |
| alert("unsubscribing failed"); | |
| }); | |
| } | |
| </script> | |
| <input id="streamName" type="text" value="stream name"></input> | |
| <button id="subscribeButton" onClick="subscribe()">Subscribe</button> | |
| <button id="unsubscribeButton" onClick="unsubscribe()">Unsubscribe</button> | |
| </body> | |
| </html> |
can you please explain how to integrate this code in an MVC application
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Packages from nuget:
Install-Package EventStore.Client
Install-Package Microsoft.Owin.Hosting -pre
Install-Package Microsoft.Owin.Host.HttpListener -pre
Install-Package Microsoft.AspNet.SignalR.Owin