Package de.firemage.autograder.core.errorprone

Record Class VMLauncher

java.lang.Object

java.lang.Record

de.firemage.autograder.core.errorprone.VMLauncher

Record Components:

jvmArgs - arguments to pass to the new JVM (those are that java -... flags)

tempLocation - a location where the result of the code can be written to (used for inter-process communication)

public record VMLauncher(List<String> jvmArgs, TempLocation tempLocation, Optional<String> mainClassName)
extends Record

A class that can be used to run code in a new JVM.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	VMLauncher.VMHandle<T extends Serializable>	Represents a reference to the launched VM.

Constructor Summary

Constructors

Constructor	Description
VMLauncher(List<String> jvmArgs, TempLocation tempLocation, Optional<String> mainClassName)	Creates an instance of a VMLauncher record class.

Method Summary

Modifier and Type	Method	Description
final boolean	equals(Object o)	Indicates whether some other object is "equal to" this one.
static VMLauncher	fromDefault(TempLocation tmpLocation)
final int	hashCode()	Returns a hash code value for this object.
List<String>	jvmArgs()	Returns the value of the jvmArgs record component.
Optional<String>	mainClassName()	Returns the value of the mainClassName record component.
<T extends Serializable> VMLauncher.VMHandle<T>	runInNewJVM(SerializableSupplier<T> supplier)	Runs the given lambda in a new JVM.
TempLocation	tempLocation()	Returns the value of the tempLocation record component.
final String	toString()	Returns a string representation of this record class.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

VMLauncher

public VMLauncher(List<String> jvmArgs,
 TempLocation tempLocation,
 Optional<String> mainClassName)

Creates an instance of a VMLauncher record class.

Parameters:

jvmArgs - the value for the jvmArgs record component

tempLocation - the value for the tempLocation record component

mainClassName - the value for the mainClassName record component

Method Details

fromDefault

public static VMLauncher fromDefault(TempLocation tmpLocation)
                              throws IOException

Throws:

IOException

runInNewJVM

public <T extends Serializable>
VMLauncher.VMHandle<T> runInNewJVM(SerializableSupplier<T> supplier)
                            throws IOException

Runs the given lambda in a new JVM.

Note that the IDEs debugger will most likely not attach to code called in this lambda. Therefore, it is recommended to run as little code as possible in this lambda.

Type Parameters:

T - the type of the result returned by the lambda

Parameters:

supplier - the code to run in the new JVM

Returns:

a handle to the launched code

Throws:

IOException - if it failed to serialize the lambda

toString

public final String toString()

Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.

Specified by:

toString in class Record

Returns:

a string representation of this object

hashCode

public final int hashCode()

Returns a hash code value for this object. The value is derived from the hash code of each of the record components.

Specified by:

hashCode in class Record

Returns:

a hash code value for this object

equals

public final boolean equals(Object o)

Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. All components in this record class are compared with Objects::equals(Object,Object).

Specified by:

equals in class Record

Parameters:

o - the object with which to compare

Returns:

true if this object is the same as the o argument; false otherwise.

jvmArgs

public List<String> jvmArgs()

Returns the value of the jvmArgs record component.

Returns:

the value of the jvmArgs record component

tempLocation

public TempLocation tempLocation()

Returns the value of the tempLocation record component.

Returns:

the value of the tempLocation record component

mainClassName

public Optional<String> mainClassName()

Returns the value of the mainClassName record component.

Returns:

the value of the mainClassName record component