Package com.vaadin.flow.server.frontend

Class TaskCompressStaticResources

java.lang.Object

com.vaadin.flow.server.frontend.TaskCompressStaticResources

All Implemented Interfaces:

FallibleCommand

public class TaskCompressStaticResources
extends Object
implements FallibleCommand

Pre-compresses static resources served straight from META-INF/resources (e.g. CSS referenced with @StyleSheet, JavaScript, SVG) into brotli (.br) and gzip (.gz) siblings, mirroring the compression Vite applies to bundled assets. These resources never enter the Vite bundle, so without this task they would always be served uncompressed.

Runs on every production build, independent of whether the frontend bundle is rebuilt or reused, and after TaskProcessStylesheetCss so the already minified and inlined CSS gets compressed.

The JDK cannot produce brotli, so brotli is delegated to a small Node script relying solely on Node's built-in zlib. Node is only used when it is already available, so it is never downloaded merely to compress resources; when Node is not available the task still produces gzip variants using the JDK. Both variants are pre-compressed so the server can serve whichever the client accepts.

For internal use only. May be renamed or removed in a future release.

Method Summary

Modifier and Type	Method	Description
void	execute()	Runs the given command.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.vaadin.flow.server.frontend.FallibleCommand

setGeneratedFileSupport

Method Details

execute

public void execute()
             throws ExecutionFailedException

Description copied from interface: FallibleCommand

Runs the given command.

If execution fails then the command may throw an exception which may give a message and a cause of the failure.

Specified by:

execute in interface FallibleCommand

Throws:

ExecutionFailedException - if there is an execution error