public interface ExecutionEnv
Functionality made available to a pluggable JShell execution engine.  It is
 provided to the execution engine by the core JShell implementation.
 
This interface is designed to provide the access to core JShell functionality needed to implement ExecutionControl.
- Since:
- 9
- See Also:
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Method SummaryModifier and TypeMethodDescriptionvoidReports that the execution engine has shutdown.default Optional<JShellConsole> console()Returns theJShellConsolethat should be used by the execution engine, ornullif none.Returns the additional VM options to be used when launching the remote JVM.userErr()Returns the user's error stream.userIn()Returns the user's input stream.userOut()Returns the user's output stream.
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Method Details- 
userInInputStream userIn()Returns the user's input stream.- Returns:
- the user's input stream
 
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userOutPrintStream userOut()Returns the user's output stream.- Returns:
- the user's output stream
 
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userErrPrintStream userErr()Returns the user's error stream.- Returns:
- the user's error stream
 
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extraRemoteVMOptionsReturns the additional VM options to be used when launching the remote JVM. This is advice to the execution engine.Note: an execution engine need not launch a remote JVM. - Returns:
- the additional options with which to launch the remote JVM
 
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closeDownvoid closeDown()Reports that the execution engine has shutdown.
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consoleReturns theJShellConsolethat should be used by the execution engine, ornullif none.Note: an execution engine may not support JShellConsole.- Implementation Requirements:
- The default implementation of this method
           returns an empty Optional.
- Returns:
- returns console, or an empty Optionalif none, nevernull
- Since:
- 21
 
 
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