A CodePipeline pipeline builds a Java application. A new dependency in a .jar file must trigger a pipeline build when a new version is available. Which solution meets this requirement?

The correct solution is to use AWS CodeArtifact. CodeArtifact is a fully managed artifact repository service that supports popular package managers and artifact types like Maven (for .jar files). Publishing the dependency .jar to CodeArtifact is the standard practice for managing application dependencies. An Amazon EventBridge rule can then be configured to detect new package versions published to CodeArtifact and trigger the CodePipeline build. Storing .jar files directly in S3 is possible but less ideal for dependency management as it lacks versioning and package management features. Using ECR is incorrect because ECR is designed for Docker container images, not Java .jar files. SNS notifications alone from S3 or ECR would require custom logic to interpret the event and trigger CodePipeline, whereas EventBridge has direct integrations for CodeArtifact events.