CasCap.Api.Azure.ServiceBus 1.4.3

CasCap.Api.Azure.ServiceBus

Helper library for Azure Service Bus. Provides base service classes for queue and topic send/receive operations with event-driven message handling.

Services / Extensions

Key Methods — QueueService

• SendMessageAsync(ServiceBusMessage) — Sends a single message to the queue.
• SendMessageBatchAsync(Queue<ServiceBusMessage>, CancellationToken) — Sends a batch of messages.
• ReceiveMessagesAsync(CancellationToken) — Receives and processes messages from the queue.

Key Methods — TopicService

• SendMessageToTopicAsync(ServiceBusMessage, CancellationToken) — Sends a single message to the topic.
• SendMessageBatchToTopicAsync(Queue<ServiceBusMessage>, CancellationToken) — Sends a batch of messages.
• ReceiveFromSubscriptionAsync(CancellationToken) — Receives and processes messages from a subscription.

Class Hierarchy

Queue and Topic service abstraction for Azure Service Bus:

classDiagram
    direction TB

    ServiceBase <|-- QueueService
    ServiceBase <|-- TopicService
    IQueueService <|.. QueueService
    ITopicService <|.. TopicService

    class ServiceBase {
        <<abstract>>
        #ILogger Logger
        +event MessageReceivedEvent
        +event ErrorReceivedEvent
        #OnMessageReceived(args) void
        #OnErrorReceived(args) void
    }

    class IQueueService {
        <<interface>>
        +SendMessageAsync(message) Task
        +SendMessageBatchAsync(messages, token) Task
        +ReceiveMessagesAsync(token) Task
    }

    class QueueService {
        -ServiceBusClient Client
        -ServiceBusSender Sender
        -ServiceBusProcessor Processor
        +SendMessageAsync(message) Task
        +SendMessageBatchAsync(messages, token) Task
        +ReceiveMessagesAsync(token) Task
    }

    class ITopicService {
        <<interface>>
        +SendMessageToTopicAsync(message, token) Task
        +SendMessageBatchToTopicAsync(messages, token) Task
        +ReceiveFromSubscriptionAsync(token) Task
    }

    class TopicService {
        -ServiceBusClient Client
        -ServiceBusSender Sender
        -ServiceBusProcessor Processor
        +SendMessageToTopicAsync(message, token) Task
        +SendMessageBatchToTopicAsync(messages, token) Task
        +ReceiveFromSubscriptionAsync(token) Task
    }

    QueueService ..> ServiceBusClient : uses
    TopicService ..> ServiceBusClient : uses
    QueueService ..> ServiceBusSender : uses
    TopicService ..> ServiceBusSender : uses
    QueueService ..> ServiceBusProcessor : uses
    TopicService ..> ServiceBusProcessor : uses

Usage Pattern:

1. Instantiate QueueService for queue operations or TopicService for topic/subscription operations
2. Subscribe to MessageReceivedEvent for incoming messages
3. Subscribe to ErrorReceivedEvent for error handling
4. Use SendMessageAsync / SendMessageBatchAsync for sending
5. Use ReceiveMessagesAsync / ReceiveFromSubscriptionAsync to start listening

Configuration

No configuration model. Services are constructed directly with connection strings or TokenCredential.

Dependencies

NuGet Packages

Project References

None.