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I have a server which will need to send messages to several clients to let the clients know that something needs to be done.
I am trying to achieve this by using Azure Event Hub.
I use the following code to send the message:
await eventHubClient.SendAsync(
new EventData(Encoding.UTF8.GetBytes(String.Format("Message {0}, {1}", i, sMessage))),
"1")
.ConfigureAwait(continueOnCapturedContext: false);
await eventHubClient.CloseAsync();
I use two WPF application as listeners which will create the listener at startup and will save the EventProcessorHost in a private variable.
When I send a message it's random which of the listeners will process the message.
Is is possible to send messages to multiple recipients with Azure Event Hub?
246
A consumer group is a view (state, position, or offset) of an entire event hub. Consumer groups enable multiple consuming applications to each have a separate view of the event stream, and to read the stream independently at their own pace and with their own offsets.
A partition is an ordered sequence of events that is held in an event hub. As newer events arrive, they are added to the end of this sequence. A partition can be thought of as a “commit log.” Event Hubs retains data for a configured retention time that applies across all partitions in the event hub.
Once inside the Event Hub, there should be a "CONSUMER GROUPS" tab at the top, click on that. Once inside, in the navy blue footer, there should be a "create" button which will let you create a new consumer group.
You need to put each listener to a separate Consumer Group.
Listeners of the same consumer group are "Competing Consumers", i.e. the first one who takes a lock on an event hub partition wins.
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