Oracle Cloud Infrastructure Documentation

Java Migration Analysis

JMS Fleets facilitates the migration of applications from older JDKs to newer ones for developers seeking to take advantage of the latest performance enhancements and language improvements. Through its Migration Analysis feature, JMS performs a comprehensive analysis of the application and generates detailed reports calling out the potential effort and risk involved in the migration process.

The Migration Analysis report provides developers with a clear picture of the level of effort required to transition to a newer JDK version. Migration Analysis also allows developers to easily consider different JDK version choices. By quantifying the effort involved in migrating to different JDK versions, developers can make informed decisions about which JDK version to migrate to.
Note

Migration Analysis can be invoked on Java workloads running on Oracle and OpenJDK releases of Java 8 and later versions.

During the migration process, developers can utilize the analysis reports from Migration Analysis to identify classes and APIs that require changes. The reports specify line numbers in the source code where modifications are needed and highlight both mandatory and recommended changes.

The report is available in two formats:

  1. In JMS Fleet Management: The report can be viewed in the OCI console from the fleet where the Migration analysis action was initiated.
  2. Static HTML: The report can be downloaded from the OCI console, enabling easy sharing with other team members for collaborative analysis and discussion.

To enable Java Migration Analysis in your fleet, see Enabling Advanced Features.