Class RemoteExecutionControl

java.lang.Object
jdk.jshell.execution.DirectExecutionControl
jdk.jshell.execution.RemoteExecutionControl
All Implemented Interfaces:
AutoCloseable, ExecutionControl 
public class RemoteExecutionControl extends DirectExecutionControl implements ExecutionControl
The remote agent runs in the execution process (separate from the main JShell process). This agent loads code over a socket from the main JShell process, executes the code, and other misc, Specialization of DirectExecutionControl which adds stop support controlled by an external process. Designed to work with JdiDefaultExecutionControl.
Since:
9

Nested Class Summary

Nested classes/interfaces declared in interface jdk.jshell.spi.ExecutionControl

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

Constructor Summary

Constructor Description
RemoteExecutionControl()
Create an instance using the default class loading.
RemoteExecutionControl(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.
static void main(String[] args)
Launch the agent, connecting to the JShell-core over the socket specified in the command-line argument.
void redefine(ExecutionControl.ClassBytecodes[] cbcs)
Redefine processing on the remote end is only to register the redefined classes
void stop()
Interrupts a running invoke.
String varValue(String className, String varName)
Returns the value of a variable.

Methods declared in class jdk.jshell.execution.DirectExecutionControl

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

Methods declared in class java.lang.Object

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

Methods declared in interface jdk.jshell.spi.ExecutionControl

addToClasspath, close, extensionCommand, invoke, load

Constructor Details

RemoteExecutionControl

public RemoteExecutionControl(LoaderDelegate loaderDelegate)
Creates an instance, delegating loader operations to the specified delegate.
Parameters:
loaderDelegate - the delegate to handle loading classes

RemoteExecutionControl

public RemoteExecutionControl()
Create an instance using the default class loading.

Method Details

main

public static void main(String[] args) throws Exception
Launch the agent, connecting to the JShell-core over the socket specified in the command-line argument.
Parameters:
args - standard command-line arguments, expectation is the socket number is the only argument
Throws:
Exception - any unexpected exception

redefine

public void redefine(ExecutionControl.ClassBytecodes[] cbcs) throws ExecutionControl.ClassInstallException, ExecutionControl.NotImplementedException, ExecutionControl.EngineTerminationException
Redefine processing on the remote end is only to register the redefined classes
Specified by:
redefine in interface ExecutionControl
Parameters:
cbcs - the class name and bytecodes to redefine
Throws:
ExecutionControl.ClassInstallException - exception occurred redefining the classes, some or all were not redefined
ExecutionControl.NotImplementedException - if not implemented
ExecutionControl.EngineTerminationException - the execution engine has terminated

stop

public void stop() throws ExecutionControl.EngineTerminationException, ExecutionControl.InternalException
Description copied from class: DirectExecutionControl
Interrupts a running invoke.

Not supported.

Specified by:
stop in interface ExecutionControl
Overrides:
stop in class DirectExecutionControl
Throws:
ExecutionControl.EngineTerminationException - the execution engine has terminated
ExecutionControl.InternalException - an internal problem occurred

varValue

public String varValue(String className, String varName) throws ExecutionControl.RunException, ExecutionControl.EngineTerminationException, ExecutionControl.InternalException
Description copied from interface: ExecutionControl
Returns the value of a variable.
Specified by:
varValue in interface ExecutionControl
Parameters:
className - the name of the wrapper class of the variable
varName - the name of the variable
Returns:
the value of the variable
Throws:
ExecutionControl.UserException - formatting the value raised a user exception
ExecutionControl.ResolutionException - formatting the value attempted to directly or indirectly invoke an unresolved snippet
ExecutionControl.StoppedException - if the formatting the value was canceled by ExecutionControl.stop()
ExecutionControl.EngineTerminationException - the execution engine has terminated
ExecutionControl.InternalException - an internal problem occurred
ExecutionControl.RunException

clientCodeEnter

protected void clientCodeEnter()
Description copied from class: DirectExecutionControl
Marks entry into user code.
Overrides:
clientCodeEnter in class DirectExecutionControl

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/17/docs/api/jdk.jshell/jdk/jshell/execution/RemoteExecutionControl.html