Triggering Messages

Messages come into the ESB profile of WSO2 Enterprise Integrator (WSO2 EI) through the following message entry points:

• REST APIs - REST APIs accept REST messages that allow clients to provide additional information on how to manage the message in the ESB profile.
• Proxy Services - A proxy service receives messages that are then sent to a specific endpoint.
• Inbound Endpoints - An inbound endpoint injects a message directly from the transport layer to the mediation layer, without going through the Axis2 engine.
• Tasks - A task injects a message into the ESB profile at a scheduled interval.

When the the ESB profile receives a message, it sends it either to a proxy service or to the Main sequence for handling. The proxy or sequence is configured with message mediation, which controls how the message will be transformed, filtered, forwarded, etc. 

 For more information on how you can invoke message flows in the ESB profile, see the following topics.

• Working with APIs
• Working with Proxy Services
• Working with Inbound Endpoints
• Working with Scheduled Tasks
• Using REST