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

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

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