All three that is JMS, Event Mesh and AMQP adapters are widely used in SAP for different purposes. The common thing among all these three is that these three are asynchronous adapters.
Asynchronous means they send message without waiting for the response or they work independently. That means there is no need for both the sender and receiver to interact and work together.
Understanding the Basics
Now let's just see the basics of each adapter and then dive deeper to the main part of the blog.
JMS
JMS adapter stands for Java Message Service. It is used in cases where we need guaranteed message delivery by storing in queue (if needed) with CPI system. It is not specifically built for cloud-native or event driven architecture.
SAP Event Mesh
This is used in both cloud systems and event driven. It can be said cloud native as it is designed to run in cloud environments. Event driven as it is built around Pub-Sub (Publish-Subscribe) model. This is used widely for connecting outside the CPI system. This has many adapters like AMQP, MQTT(Message Queuing Protocol) and HTTP REST.
AMQP Adapter
AMQP stands for Advanced Event Mesh. It acts as a bridge between application and broker. Broker is nothing but an event broker like Solace. It is primarily an event driven architecture but can also be a part of cloud native architecture depending on the usage.
When to Use What?
Here’s how I usually decide between these options:
Go with JMS if...
You’re working with java centric enterprise environment, need reliable messaging and on premise that in within the CI/CPI system.
Choose Event Mesh if...
You’re working on cloud native or IOT applications, need real time event routing and need dynamic event distribution.
Use the AMQP Adapter if...
You need to connect event brokers like any third-party broker system, interoperable messaging and control over message delivery, routing and reliability.
Real-World Scenarios
Let me share a couple of examples to put this into context:
Legacy ECC System + JMS:
In one project, wherein we needed a guaranteed message delivery, I used 2 I-flows and it was within the CPI system that is on premise system. For this JMS was the best adapter. We have to give the queue name, and select whether it's exclusive or non-exclusive.
AMQP Adapter with Third-Party Systems:
In another case, I needed to integrate SAP with a third-party logistics provider using Solace. So in this case this was the best suited as it is cloud supported. We have to give the username and password of solace adapter, give the credential name that we create in security material section.
So, the thing between choosing JMS, AMQP or Event Mesh depends on the situation and what is needed for a particular situation. So, with so many options being available on SAP, we have to make a wise choice to choose between the available adapters.
JMS vs Event Mesh vs AMQP Adapter
| Feature | JMS | Event Mesh | AMQP Adapter |
| Best For | Legacy SAP (PI/PO, ECC) | Cloud-native SAP (BTP, S/4) | Hybrid SAP + external systems |
| Architecture | Tightly coupled | Loosely coupled, event-driven | Protocol-based integration |
| Scalability | Limited | High | Depends on external broker |
| Integration Effort | Low (in legacy) | Low (in BTP) | Moderate |
| Real-Time Support | Limited | Excellent | Good |
Features JMS Event Mesh AMQP Adapter
*Best For Legacy SAP (PI/PO, ECC) Cloud-native SAP (BTP, S/4) Hybrid SAP + external systems.
*Architecture Tightly coupled Loosely coupled, event-driven Protocol-based integration.
*Scalability Limited High Depends on external broker.
*Integration Effort Low (in legacy) Low (in BTP) Moderate.
*Real-Time Support Limited Excellent Good.
Conclusion:
Picking the Right Messaging Tool for Your SAP Landscape
At the end of the day, choosing between JMS, Event Mesh, and the AMQP Adapter isn’t about which one is “better”—it’s about which one fits your current architecture, integration goals, and future roadmap.
If you're working with legacy SAP systems like PI/PO or ECC, JMS is still a solid choice. It’s stable, well-supported, and gets the job done in tightly coupled environments.
But if you're moving toward SAP BTP or building event-driven, cloud-native applications, Event Mesh is the way forward. It’s built for scale, flexibility, and real-time responsiveness—exactly what modern enterprise landscapes need.
And when you’re dealing with external systems—whether it’s a logistics partner using RabbitMQ or a cloud service on Azure—AMQP Adapter gives you the protocol-level integration you need without compromising on standards or reliability.
So, my advice? Start with your architecture and business needs, then choose the messaging tool that aligns best. And remember—these tools aren’t mutually exclusive. In many real-world SAP landscapes, you’ll find all three working together to keep data flowing smoothly across systems.
So, it's not just creating an I-flow and using whichever we feel better. It's about choosing the best among the available options and that which is practical for the application for which we are using a particular adapter. We have to choose the one with better efficiency. SAP has provided us with so many options, we have to choose the best one and it's important.
Bluesky
