springBootUtility command

Use the springBootUtility command to create thin Spring Boot applications and library caches that can be deployed on a Liberty application server.

About

The springBootUtility command stores the dependent library JARs of the application to the target library cache and packages the remaining application artifacts into a thin application JAR. When you specify a read-only parent library cache, the command creates a target library cache that contains only the libraries that are not available in the parent cache. Use this capability to create efficient Docker layers for your Spring Boot application.

Syntax

Use the following command syntax:

springBootUtility action [options]

The options value is different based on the action value.

Parameters

The following actions are available for the springBootUtility command:

help: Print help information for the specified action.
thin: Create a thin application and library cache from a fat Spring Boot application.

Options

--sourceAppPath=path

The path of the source application file to thin.

This option is required.

--parentLibCachePath=directory

The directory path of the parent read-only library cache. The parent library cache is searched first to locate existing libraries. If the library is not found, the library is stored in the writable library cache that is specified by --targetLibCachePath. If this option is not specified, no parent library cache is searched.

This option is not required.

--targetLibCachePath=directory

The directory path that is used to save the library cache. If this option is not specified, a lib.index.cache directory is created in the parent directory of the source application.

This option is not required.

--targetThinAppPath=file

The path that is used to save the thin application file. If this option is not specified, a new file is created with the .spring extension in the parent directory of the source application.

This option is not required.