In Oracle Integration Cloud (OIC) and many other integration platforms, “Global Fault Handlers” and “Scope Fault Handlers” are mechanisms for handling errors and exceptions in integration flows. Each has its purpose and use cases:

1. Global Fault Handlers:

• • Scope: Global Fault Handlers are defined at the integration level and can handle errors that occur at any point in the entire integration flow.
• Use Cases:
  
  • • They are typically used to handle generic or global errors that can occur anywhere in the integration.
    • Useful for handling unexpected or unhandled exceptions that may not be specifically anticipated within individual scopes of the integration.
  • Often used for logging errors, sending notifications, or taking other global actions when something goes wrong.

1. Scope Fault Handlers:

• • Scope: Scope Fault Handlers are defined within specific scopes or activities in the integration flow. Each scope can have its own fault handler.
• Use Cases:
  
  • • They are used to handle errors that are specific to a particular scope or activity within the integration.
    • Useful for implementing custom error handling logic tailored to the expected exceptions within that specific scope.
  • Allow for more granular control over error handling, as different scopes may have different error handling requirements.

Here’s a comparison to illustrate the differences:

• Scope:
  
  • Global Fault Handlers are at the integration level and apply to the entire integration.
  • Scope Fault Handlers are defined within specific activities or scopes.
• Error Scope:
  
  • Global Fault Handlers can catch errors that occur anywhere in the integration flow.
  • Scope Fault Handlers are limited to handling errors within their respective scopes.
• Use Cases:
  
  • Global Fault Handlers are suitable for handling unexpected or global errors that can occur anywhere in the integration.
  • Scope Fault Handlers are suitable for handling errors specific to particular activities or scopes, allowing for custom error handling logic.
• Granularity:
  
  • Global Fault Handlers offer a higher-level, catch-all approach.
  • Scope Fault Handlers offer a more fine-grained, activity-specific approach.
• Order of Execution:
  
  • Global Fault Handlers are executed if no Scope Fault Handler within a specific scope catches the error.
  • Scope Fault Handlers are executed for errors specific to their respective scopes.

In practice, it’s common to use a combination of both Global Fault Handlers and Scope Fault Handlers in complex integration flows. Global handlers can handle broad error scenarios, while Scope Fault Handlers can provide more detailed error handling within specific parts of the integration.