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At Tally, our custom CRM applications are the backbone of our business. But when we embarked on integrating these systems with COTS solutions, a significant challenge emerged: ensuring seamless interaction for real-time processing of high-volume commercial transactions. We needed a system that could handle a large influx of requests quickly and efficiently. Initially, we leveraged the REST API for asynchronous communication. However, it has limitations, particularly when dealing with high-volume of request.
To address these limitations, consider leveraging the Pub/Sub model with AWS EventBridge. This approach offers a more efficient and scalable way for real-time communication across multiple systems.
The Pub/Sub model revolves around two key elements: publishers and subscribers. Publishers send messages, while subscribers receive them. It operates on a "fire and forget" principle – the publisher transmits the message without waiting for a response, which is later received asynchronously through a subscriber in a separate thread. REST API waits for response and then sends other request where Publishers don't wait for responses, freeing them for other tasks, leading to a more responsive system overall.
Feature |
Pub/Sub |
REST API |
Communication Style |
Asynchronous (fire-and-forget) |
Synchronous (wait for response) |
Scalability |
Handles large volumes efficiently |
Bottlenecks during peak loads |
Decoupling |
Loose coupling (publishers & subscribers independent) |
Tight coupling (clients & servers dependent) |
Overall System Efficiency |
Improved due to asynchronous processing |
Potentially impacted by waiting for responses |
Amazon Web Services (AWS) offers a robust Pub/Sub service called Amazon EventBridge. This serverless event bus acts as the central hub for message delivery, filtering, and routing.
Example: When a customer place new order from system 1, System 1 publishes an event to a specific topic in EventBridge. This event contains details like customer information and order details. Meanwhile, your order processing system (System 2) subscribes to this dedicated topic. Upon receiving the published event, EventBridge steps in. It acts as a smart filter, removing unnecessary information like customer names or addresses. System 2 then receives only the crucial details it needs to process the order efficiently. This streamlined approach prevents System 2 from being overloaded with irrelevant data, ensuring smooth and rapid order fulfilment.
Pub/Sub can be integrated with other AWS services like SQS (Simple Queue Service) to enhance reliability. SQS acts as a buffer for undelivered messages, allowing for automatic retries or manual intervention if necessary. You can also configure message lifespans to manage data persistence.
The Pub/Sub model enabled us to connect our CRM applications with COTS solutions effectively. This created a strong and scalable solution that manages our expanding enterprise requirements seamlessly, preventing service interruptions. This approach transformed our integration process by ensuring real-time data synchronization and handling high volumes of requests simultaneously. Additionally, the retry mechanism automates the processing of failed transactions, ensuring system reliability.
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