Module jdk.jshell
Package jdk.jshell.spi
Defines the Service Provider Interface for pluggable JShell execution engines.
The JShell core tracks and compiles Snippets then sends them
(represented in a wrapper class) to the execution engine for loading,
and in the case of executable Snippets, execution. The JShell
implementation includes a default execution engine (currently a remote
process which is JDI controlled). By implementing the
ExecutionControl interface and its generating class,
an implementation of the ExecutionControlProvider
interface, and installing it with
JShell.Builder.executionEngine(String)
other execution engines can be used. Where the passed String is an
ExecutionControl spec.
The ExecutionControl spec is the ExecutionControlProvider
name optionally followed by a parameter specification.
The syntax of the spec is:
spec := name : params
| name
name := identifier
params := param , params
| param
|
param := identifier ( value )
Where 'name' is the ExecutionControlProvider
name.
Where 'param' is a Map key from
ExecutionControlProvider.defaultParameters() and the parenthesized
value; See, for example,
JdiExecutionControlProvider.
Where 'identifier' is a sequence of
Java identifier part characters from the Basic Multilingual Plane.
For example:
- local
- jdi:hostname(localhost)
- failover:1(jdi),2(jdi:launch(true),timeout(3000)),3(local)
- Since:
- 9
- See Also:
for execution implementation support
-
Interface Summary Interface Description ExecutionControl This interface specifies the functionality that must provided to implement a pluggable JShell execution engine.ExecutionControlProvider The provider used by JShell to generate the execution engine needed to evaluate Snippets.ExecutionEnv Functionality made available to a pluggable JShell execution engine. -
Class Summary Class Description ExecutionControl.ClassBytecodes Bundles class name with class bytecodes. -
Exception Summary Exception Description ExecutionControl.ClassInstallException A class install (load or redefine) encountered a problem.ExecutionControl.EngineTerminationException Unbidden execution engine termination has occurred.ExecutionControl.ExecutionControlException The abstract base of allExecutionControlexceptions.ExecutionControl.InternalException An internal problem has occurred.ExecutionControl.NotImplementedException The command is not implemented.ExecutionControl.ResolutionException An exception indicating that aDeclarationSnippetwith unresolved references has been encountered.ExecutionControl.RunException The abstract base of of exceptions specific to running user code.ExecutionControl.StoppedException An exception indicating that anExecutionControl.invoke(java.lang.String, java.lang.String)(or theoretically aExecutionControl.varValue(java.lang.String, java.lang.String)) has been interrupted by aExecutionControl.stop().ExecutionControl.UserException A 'normal' user exception occurred.SPIResolutionException The construction and throw of this exception is embedded in code generated by the JShell core implementation in such a way that, upon executing aRECOVERABLE_DEFINEDuser method, this exception is thrown.