[Snyk] Security upgrade io.vertx:vertx-core from 3.8.5 to 4.5.29

[benjaminhuo]

Snyk has created this PR to fix 3 vulnerabilities in the maven dependencies of this project.

Snyk changed the following file(s):

• builders/testdata/java/vertx-helloworld/pom.xml

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score	Upgrade
	Allocation of Resources Without Limits or Throttling SNYK-JAVA-IONETTY-18170202	828	io.vertx:vertx-core: 3.8.5 -> 4.5.29 Major version upgrade Proof of Concept
	Allocation of Resources Without Limits or Throttling SNYK-JAVA-IONETTY-18170204	828	io.vertx:vertx-core: 3.8.5 -> 4.5.29 Major version upgrade Proof of Concept
	Allocation of Resources Without Limits or Throttling SNYK-JAVA-IONETTY-18170213	721	io.vertx:vertx-core: 3.8.5 -> 4.5.29 Major version upgrade No Known Exploit

Breaking Change Risk

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🦉 Allocation of Resources Without Limits or Throttling

[benjaminhuo]

The upgrade from Vert.x 3.8.5 to 4.5.29 is a major version jump with significant breaking changes that require substantial developer effort to migrate.

Key Breaking Changes:

• Asynchronous Operations: Vert.x 4 introduces a Future-based model for asynchronous operations as a primary alternative to callbacks. While callbacks are still supported to ease migration, many APIs have been updated to return Futures, and this is the preferred approach moving forward.
• API Removals: APIs that were deprecated in Vert.x 3.x have been removed in version 4. This includes the removal of multi-threaded worker verticles, which should be replaced with Vertx.executeBlocking().
• WriteStream API: The write and end methods on WriteStream are no longer fluent (they do not return the stream instance). This will break any chained calls.
• JSON Handling: The direct dependency on Jackson Databind is now optional and must be added explicitly for object mapping. Static methods like Json.mapper() have been removed and replaced by methods in io.vertx.core.json.jackson.DatabindCodec.
• EventBus & Messaging: The MessageProducer interface no longer extends WriteStream, and some request-response send methods on the EventBus have been removed.
• Vert.x Web: The vertx-web-api-contract module is deprecated and users must migrate to the new vertx-web-openapi module. Several interfaces and methods within Vert.x Web have been removed or replaced.

Source: Eclipse Vert.x 4.0 Migration Guide
Recommendation: This is a major migration that requires careful planning and significant code refactoring. Developers must follow the official migration guide closely to update asynchronous handling, API calls, and dependencies. This upgrade should be handled in a separate, dedicated effort.

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.

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