Governing web APIs on Anypoint Platform17% of the exam
Custom Policy Packaging and Execution
Choose reusable custom-policy behavior, separate deployable assets and runtime boundaries, and check message propagation, dependency compatibility and built-in policy context.
Identify scenarios needing custom API policies.
~7 min read · 3 practice questions
What the exam expects
- Identify reusable requirements that need behavior beyond an included policy.
- Separate configurable policy metadata from executable implementation assets.
- Place controls around API entry or individual outbound HTTP requests.
- Predict execution, message propagation and variable boundaries.
- Validate dependency compatibility before applying a policy to an application.
A custom policy extends or adds reusable enforcement behavior; a source block wraps flow execution; an operation block wraps an HTTP Requester; execute-next continues the processing chain; a policy asset combines implementation and configurable metadata (Custom policies, Development reference).
Sources for this section (2)
Key facts
Development project
- Detail
- Its JAR implements behavior and its YAML defines template parameters.
Current publishing assets
- Detail
- Definition JSON/YAML precede implementation JAR/metadata YAML on a Stable asset.
Lifecycle
- Detail
- Develop, package, upload to Exchange, apply in API Manager.
Source boundary
- Detail
- Before/after execute-next surrounds the application-flow chain.
Outbound boundary
- Detail
- Operation blocks surround individual HTTP Requesters.
Stopping execution
- Detail
- Not executing execute-next prevents continuation into the next stage.
Source response
- Detail
- Changes after execute-next propagate through the response chain.
Variable isolation
- Detail
- Same-policy blocks share variables; applications and other policies do not.
Dependency conflict
- Detail
- In shared resolution, the application's dependency version is used by the policy.
Online binding
- Detail
- API Manager supplies API information without an explicit pointcut element.
- Why is a new YAML field unnecessary solely to make policyId available?
- When a custom policy needs to identify a WSDL API, which predefined property indicates it?
- Why is an explicit pointcut element unnecessary for the online Mule 4 workflow?
The questions are free to read. Answers with their sources and self-grading are included with the pack.
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