我们如何在没有存储容器名称、StorageAccountName 和 StorageAccountKey 这些信息的情况下从 Azure 事件中心接收事件

Question

I am new to Azure platform, I have only EventHubConnectionString and EventHubName and I don't have Storage Container Name, StorageAccountName and storage account key. I want to develop one application which receives events from event hub but I am confused about how should I proceed wihtout this information.Please help with this problem.

I am following this link for reference Azure Event Hub.

Answer 1

I am confused about how should I proceed wihtout this information

It seems that in order to use Event Hub, you are required to have something to manage checkpoints. Most of the examples and documentation show using Azure Storage to hold the checkpoints that are automatically made by the current .Net Azure SDK code base. The current documentation on the EventProcessorHost doesn't appear to show the one of the constructors that does not require a storage account but a custom class that you write that derives from ICheckpointManager .

The constructor that isn't documented (at this point in time) looks like:

    //
    // Summary:
    //     Create a new host to process events from an Event Hub.
    //     This overload of the constructor allows maximum flexibility. This one allows
    //     the caller to specify the name of the processor host as well. The overload also
    //     allows the caller to provide their own lease and checkpoint managers to replace
    //     the built-in ones based on Azure Storage.
    //
    // Parameters:
    //   hostName:
    //     Name of the processor host. MUST BE UNIQUE. Strongly recommend including a Guid
    //     to ensure uniqueness.
    //
    //   eventHubPath:
    //     The name of the EventHub.
    //
    //   consumerGroupName:
    //     The name of the consumer group within the Event Hub.
    //
    //   eventHubConnectionString:
    //     Connection string for the Event Hub to receive from.
    //
    //   checkpointManager:
    //     Object implementing ICheckpointManager which handles partition checkpointing.
    //
    //   leaseManager:
    //     Object implementing ILeaseManager which handles leases for partitions.
    public EventProcessorHost(string hostName, string eventHubPath, string consumerGroupName, string eventHubConnectionString, ICheckpointManager checkpointManager, ILeaseManager leaseManager);

Answer 2

You will have to use Custom CheckpointManager for EventProcessorHost (EPH) if you dont want to use default azure checkpoint manager. Mikhailshilkov has a sample SQL checkpointmanager implementaion. SQLcheckpointManager Sample

Answer 3

You can use EventHubConsumerClient.ReadEventsAsync . To me this is better, because I don't want to use blob storage. But I am getting Error reading event: EventHubsException(ConsumerDisconnected) from time to time

Answer 4

Refer docs: https://docs.microsoft.com/en-us/java/api/com.azure.messaging.eventhubs?view=azure-java-stable

Code snippet :

EventHubConsumerAsyncClient consumer = new EventHubClientBuilder()
         .connectionString(connectionStr,eventhubName)
         .consumerGroup(EventHubClientBuilder.DEFAULT_CONSUMER_GROUP_NAME)
         .buildAsyncConsumerClient();
// Receive data for partition "0"
 consumer.receiveFromPartition("0", EventPosition.latest()).subscribe(event -> {
        System.out.println("Event received : "+event.getData().getBodyAsString());

      });