Package io.quarkus.deployment.pkg.steps

Class ForkedJvmEnvironment

java.lang.Object

io.quarkus.deployment.pkg.steps.ForkedJvmEnvironment

All Implemented Interfaces:

AutoCloseable

final class ForkedJvmEnvironment
extends Object
implements AutoCloseable

JAR tree-shake phase 3 environment: a temp directory pre-populated with generated/transformed bytecode, the ClassLoadingRecorder class, and JVM arguments. Created once and reused across iterations of the fixed-point loop so that bytecode is written to disk only once.

Method Summary

Modifier and Type	Method	Description
void	close()
(package private) static ForkedJvmEnvironment	create(Map<String,Supplier<byte[]>> generatedBytecode, Map<String,Supplier<byte[]>> transformedBytecode, List<Path> depJarPaths, List<Path> appPaths)	Prepares the forked JVM environment: creates a temp directory, writes bytecode, the recorder class, and JVM arguments.
(package private) Set<String>	executeEntryPoints(Set<String> entryPointClasses, Set<String> allKnownClasses)	Executes entry point classes in a forked JVM to capture which classes get loaded during static initialization and construction.

Methods inherited from class java.lang.Object

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

Method Details

create

static ForkedJvmEnvironment create(Map<String,Supplier<byte[]>> generatedBytecode,
 Map<String,Supplier<byte[]>> transformedBytecode,
 List<Path> depJarPaths,
 List<Path> appPaths)
                            throws IOException

Prepares the forked JVM environment: creates a temp directory, writes bytecode, the recorder class, and JVM arguments.

Parameters:

generatedBytecode - generated classes (in-memory only, must be written to disk)

transformedBytecode - transformed classes that override originals in dep JARs

depJarPaths - file system paths to dependency JARs

appPaths - file system paths to the application artifact

Throws:

IOException

executeEntryPoints

Set<String> executeEntryPoints(Set<String> entryPointClasses,
 Set<String> allKnownClasses)
                        throws IOException,
InterruptedException

Executes entry point classes in a forked JVM to capture which classes get loaded during static initialization and construction.

Parameters:

entryPointClasses - classes whose init/clinit triggers dynamic class loading

allKnownClasses - all known class names for Map value extraction and result filtering

Returns:

discovered class names limited to allKnownClasses, or empty set on failure

Throws:

IOException

InterruptedException

close

public void close()

Specified by:

close in interface AutoCloseable