Implement performant and reliable Mule applications27% of the exam
Validation assertions and error handling
Configure assertion criteria, parsing and localized messages, aggregate actual validation-family errors, and distinguish format, time-window and typed-value requirements.
Validate assertions using the Validation module.
~7 min read · 10 practice questions ·
What the exam expects
- Group assertions and handle validation errors by their actual hierarchy.
- Configure input parsing independently of error-message localization.
- Distinguish syntax, reachability, address components and business time windows.
- Select null, blank and size assertions for the value actually supplied.
An assertion rejects data that violates a criterion; All groups validation results; an error hierarchy defines parent matching; locale can govern parsing or message language; Since starts an elapsed-time interval. This lesson uses Mule 4.6 with Validation 2.0.6, and JSON 2.4.2 where the error ancestry matters (Validation reference, Validation source, JSON source).
Key facts
All execution
- Detail
- Nested checks run sequentially on the flow thread.
- Source
- All (opens in a new tab)
Aggregate descriptions
- Detail
- Customize each inner operation's Message.
Eligible errors
- Detail
- All checks the
MULE:VALIDATIONparent hierarchy.
JSON schema ancestry
- Detail
- JSON 2.4.2 schema-not-honoured descends from validation.
Number parsing
- Detail
- Configure Number Type, Locale and Pattern.
Time parsing
- Detail
HH:mmdescribes a 24-hour hour/minute value.
URL check
- Detail
- Syntax acceptance does not prove remote reachability.
- Source
- URL (opens in a new tab)
IP check
- Detail
- Validate the address without a port suffix.
- Source
- IP (opens in a new tab)
I18n sharing
- Detail
- Operations reference the configured bundle and locale.
Time-window origin
- Detail
- Since is the initial DateTime, not the interval size.
- Why can identical
nulltext in a log hide different validation inputs? - When a custom validation message replaces the standard wording, does that alone rename the error type?
- Why should a downstream operation not assume Is Number converted a numeric String into a Number?
The questions are free to read. Answers with their sources and self-grading are included with the pack.
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