Class MinestomStopCleanlyTransformer

java.lang.Object

eu.cloudnetservice.wrapper.transform.minestom.MinestomStopCleanlyTransformer

All Implemented Interfaces:

ClassTransformer

@Internal
public final class MinestomStopCleanlyTransformer
extends Object
implements ClassTransformer

MinestomStopCleanlyTransformer relies on preview features of the Java platform:

• MinestomStopCleanlyTransformer refers to one or more preview APIs: ClassTransform.

Programs can only use MinestomStopCleanlyTransformer when preview features are enabled.

Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.

A transformer for the ServerProcessImpl class in Minestom which inserts a call to System.exit before the last return statement in the stop method to ensure a clean shutdown of the wrapper process.

Since:

4.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static final class	MinestomStopCleanlyTransformer.ServerProcessImplStopCodeTransformPREVIEW	A transform that resolves the last return statement in a method and inserts a call to System.exit before.

Nested classes/interfaces inherited from interface eu.cloudnetservice.wrapper.transform.ClassTransformer

ClassTransformer.TransformWillingness

Field Summary

Fields

Modifier and Type	Field	Description
private static final ClassDesc	CD_SYSTEM
private static final String	CNI_MINECRAFT_SERVER
private static final String	MN_SERVER_PROCESS_STOP
private static final String	MN_SYSTEM_EXIT
private static final MethodTypeDesc	MTD_EXIT

Constructor Summary

Constructors

Constructor	Description
MinestomStopCleanlyTransformer()	Constructs a new instance of this transformer, usually done via SPI.

Method Summary

Modifier and Type	Method	Description
@NonNull ClassTransformer.TransformWillingness	classTransformWillingness(@NonNull String internalClassName)	Checks if this class transformer is willing to transform the class with the given internal name.
@NonNull ClassTransformPREVIEW	provideClassTransform()	Provides the class transform that will be used to transform the class data.

Methods inherited from class java.lang.Object

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

Field Details

MN_SYSTEM_EXIT

private static final String MN_SYSTEM_EXIT

See Also:

• Constant Field Values

MN_SERVER_PROCESS_STOP

private static final String MN_SERVER_PROCESS_STOP

See Also:

• Constant Field Values

CD_SYSTEM

private static final ClassDesc CD_SYSTEM

CNI_MINECRAFT_SERVER

private static final String CNI_MINECRAFT_SERVER

See Also:

• Constant Field Values

MTD_EXIT

private static final MethodTypeDesc MTD_EXIT

Constructor Details

MinestomStopCleanlyTransformer

public MinestomStopCleanlyTransformer()

Constructs a new instance of this transformer, usually done via SPI.

Throws:

UnsupportedOperationException - if this transformer is explicitly disabled.

Method Details

provideClassTransform

@NonNull
public @NonNull ClassTransformPREVIEW provideClassTransform()

Provides the class transform that will be used to transform the class data. This method should only be called if a prior check to ClassTransformer.classTransformWillingness(String) did not indicate a rejection of the class.

Specified by:

provideClassTransform in interface ClassTransformer

Returns:

the class transform to apply to the target class.

classTransformWillingness

@NonNull
public @NonNull ClassTransformer.TransformWillingness classTransformWillingness(@NonNull
 @NonNull String internalClassName)

Checks if this class transformer is willing to transform the class with the given internal name. If this method is not returning a rejection status, the ClassTransformer.provideClassTransform()^PREVIEW method is called and the transform gets applied to the target class.

Specified by:

classTransformWillingness in interface ClassTransformer

Parameters:

internalClassName - the internal class name of the class being checked for transformation.

Returns:

the willingness of transformation for the class with the given name.