Mule Migration Assistant is a command-line tool that helps migrate Mule 3.x applications to Mule 4.x. This tool works on a "best-effort" basis to translate every component in the base application. This means that if it does not complete 100% of the migration, manual adjustments are required. A migration report generated when the assistant is ran can help with those adjustments.
Mule Migration Assistant is distributed under the terms of the 3-Clause BSD License
Important: Mule Migration Assistant (MMA) is subject to the terms and conditions described for Community connectors.
In order to understand the tool, let's start with a couple of informal definitions:
- Task → a set of steps;
- Step → an operation that change/remove/update a resource or content that can be present in a project.
In simple terms, the tool executes a sequence of tasks over a project and outputs a migrated project and a report about the migration.
The Mule Migration Assistant workflow is designed as follows:
- Migration Archetype: Maven archetype generator for a new Migration Task contribution.
- Migration API: Set of API's to use when developing a new Migration task.
- Contributions: Where all external contributions are contributed to the tools. The set of migration tasks defined on this module will be loaded to the Migration Assistant trough SPI.
- Expression Migrator: MEL to DW migrator. It contains all the rules to migrate Mule 3 expressions defined on MEL to the new DW transformation language on Mule 4.
- Migration Library: Set of default migrations that are shipped with the Mule Migration Assistant. It contains all the migrations of Mule Core components, MUnit, etc.
- Engine: The execution engine that identifies the project type, locate all the migration tasks available and performs the migration.
- Runner: Console implementation to execute the Mule Migration Assistant.
- Integration Tests: Suite of tests to validate all the component that will be supported by this tool.
These are the instructions to have the project up and running.
If you would just like to download/access the MMA tool (compiled version), you can download/access available versions from the releases location.
- Java 8
- Maven 3.3.9
See the following commands in order to clone, build and run this project
$ git clone git@github.com:mulesoft/mule-migration-assistant.git
$ cd mule-migration-assistant/
$ mvn clean package
$ cd runner/target
$ java -jar mule-migration-assistant-runner-*CURRENT VERSION*.jar [parameters]
| Parameter | Description | Required |
|---|---|---|
| projectBasePath | Path of the application to be migrated | Yes |
| destinationProjectBasePath | Path where to generate the migrated application | Yes |
| muleVersion | Mule 4 version to define on the application | Yes |
| parentDomainBasePath | Path of the domain to be migrated | No |
| help | Show all the parameters to define on MMA | No |
| cancelOnError | Use cancelOnError = true the MMA stop migration if a exception occurs (default false) | No |
| projectParentGAV | Use projectParentGAV 'groupId:artifactId:version' to migrate your parent inside the pom.xml | No |
| jsonReport (experimental) | Generate migration report in JSON format | No |
For guidance using MMA to assist in a migration, see the user documentation.
This project is Open Source and therefore welcome contributions, in case you wish to contribute please check our contribution guide