Class LocalExecutionControl

java.lang.Object

jdk.jshell.execution.DirectExecutionControl

jdk.jshell.execution.LocalExecutionControl

All Implemented Interfaces:

AutoCloseable, ExecutionControl

public class LocalExecutionControl
extends DirectExecutionControl

An implementation of ExecutionControl which executes in the same JVM as the JShell-core.

Since:

9

Nested Class Summary

Nested classes/interfaces declared in interface ExecutionControl

ExecutionControl.ClassBytecodes, ExecutionControl.ClassInstallException, ExecutionControl.EngineTerminationException, ExecutionControl.ExecutionControlException, ExecutionControl.InternalException, ExecutionControl.NotImplementedException, ExecutionControl.ResolutionException, ExecutionControl.RunException, ExecutionControl.StoppedException, ExecutionControl.UserException

Modifier and Type	Interface	Description
static final class	ExecutionControl.ClassBytecodes	Bundles class name with class bytecodes.
static class	ExecutionControl.ClassInstallException	A class install (load or redefine) encountered a problem.
static class	ExecutionControl.EngineTerminationException	Unbidden execution engine termination has occurred.
static class	ExecutionControl.ExecutionControlException	The abstract base of all ExecutionControl exceptions.
static class	ExecutionControl.InternalException	An internal problem has occurred.
static class	ExecutionControl.NotImplementedException	The command is not implemented.
static class	ExecutionControl.ResolutionException	An exception indicating that a DeclarationSnippet with unresolved references has been encountered.
static class	ExecutionControl.RunException	The abstract base of of exceptions specific to running user code.
static class	ExecutionControl.StoppedException	An exception indicating that an ExecutionControl.invoke(java.lang.String, java.lang.String) (or theoretically a ExecutionControl.varValue(java.lang.String, java.lang.String)) has been interrupted by a ExecutionControl.stop().
static class	ExecutionControl.UserException	A 'normal' user exception occurred.

Constructor Summary

Constructors

Constructor	Description
LocalExecutionControl()	Create an instance using the default class loading, which delegates to the system class loader.
LocalExecutionControl(ClassLoader parent)	Create an instance using the default class loading, but delegating to the specified parent class loader.
LocalExecutionControl(LoaderDelegate loaderDelegate)	Creates an instance, delegating loader operations to the specified delegate.

Method Summary

Modifier and Type	Method	Description
protected void	clientCodeEnter()	Marks entry into user code.
protected void	clientCodeLeave()	Marks departure from user code.

Methods declared in class DirectExecutionControl

addToClasspath, classesRedefined, close, extensionCommand, findClass, invoke, invoke, load, redefine, stop, throwConvertedInvocationException, throwConvertedOtherException, valueString, varValue

Modifier and Type	Method	Description
void	addToClasspath(String cp)	Adds the path to the execution class path.
protected void	classesRedefined(ExecutionControl.ClassBytecodes[] cbcs)	Notify that classes have been redefined.
void	close()	Shuts down this execution engine.
Object	extensionCommand(String command, Object arg)	Run a non-standard command (or a standard command from a newer version).
protected Class<?>	findClass(String name)	Finds the class with the specified binary name.
protected String	invoke(Method doitMethod)	Invoke the specified "doit-method", a static method with no parameters.
String	invoke(String className, String methodName)	Invokes an executable Snippet by calling a method on the specified wrapper class.
void	load(ExecutionControl.ClassBytecodes[] cbcs)	Attempts to load new classes.
void	redefine(ExecutionControl.ClassBytecodes[] cbcs)	Attempts to redefine previously loaded classes.
void	stop()	Interrupts a running invoke.
protected String	throwConvertedInvocationException(Throwable cause)	Converts incoming exceptions in user code into instances of subtypes of ExecutionControl.ExecutionControlException and throws the converted exception.
protected String	throwConvertedOtherException(Throwable ex)	Converts incoming exceptions in agent code into instances of subtypes of ExecutionControl.ExecutionControlException and throws the converted exception.
protected static String	valueString(Object value)	Converts the Object value from ExecutionControl.invoke(String, String) or ExecutionControl.varValue(String, String) to String.
String	varValue(String className, String varName)	Returns the value of a variable.

Methods declared in class Object

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

Modifier and Type	Method	Description
protected Object	clone()	Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
boolean	equals(Object o)	Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. May cause performance issues, deadlocks and hangs.
final Class<? extends Object>	getClass()	Answers the unique instance of java.lang.Class which represents the class of the receiver.
int	hashCode()	Answers an integer hash code for the receiver.
final void	notify()	Causes one thread which is waiting on the receiver to be made ready to run.
final void	notifyAll()	Causes all threads which are waiting on the receiver to be made ready to run.
String	toString()	Answers a string containing a concise, human-readable description of the receiver.
final void	wait()	Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
final void	wait(long time)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
final void	wait(long time, int frac)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

Constructor Details

LocalExecutionControl

public LocalExecutionControl(LoaderDelegate loaderDelegate)

Creates an instance, delegating loader operations to the specified delegate.

Parameters:

loaderDelegate - the delegate to handle loading classes

LocalExecutionControl

public LocalExecutionControl()

Create an instance using the default class loading, which delegates to the system class loader.

LocalExecutionControl

public LocalExecutionControl(ClassLoader parent)

Create an instance using the default class loading, but delegating to the specified parent class loader.

Parameters:

parent - parent class loader

Since:

22

Method Details

clientCodeEnter

protected void clientCodeEnter()

Description copied from class: DirectExecutionControl

Marks entry into user code.

Overrides:

clientCodeEnter in class DirectExecutionControl

clientCodeLeave

protected void clientCodeLeave()

Description copied from class: DirectExecutionControl

Marks departure from user code.

Overrides:

clientCodeLeave in class DirectExecutionControl