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()	Creates and returns a copy of this object.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
final Class<?>	getClass()	Returns the runtime class of this Object.
int	hashCode()	Returns a hash code value for this object.
final void	notify()	Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll()	Wakes up all threads that are waiting on this object's monitor.
String	toString()	Returns a string representation of the object.
final void	wait()	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
final void	wait(long timeoutMillis)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
final void	wait(long timeoutMillis, int nanos)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

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