jshell on ios without process exec?

[Grigory Ptashko]

Hello Robert!

These are good news! My hope is not lost!

Please, give me the pointers I will definitely try to re-implement this.

Thank you.

> On 11 марта 2016 г., at 22:19, Robert Field <robert.field at oracle.com> wrote:
> 
> Hi Grigory,
> 
> It is theoretically possible to implement a (reduced functionality) in-process version of JShell, in fact the original prototypes were in-process.
> 
> At this point however, JDI (which is out of process) is well ensconced in the design.
> 
> I have intentionally left some support framework for in-process in the code to facilitate a possible future in-process option.  The code is open-source, so if you are inclined I'd be happy to give you pointers to re-implement in-process.
> 
> -Robert
> 
> On 03/11/16 08:45, Grigory Ptashko wrote:
>> Hello.
>> 
>> Long story short. I’ve just tried to use jshell on ios (both arm64 and simulator).
>> 
>> I try this:
>> 
>> JShell jshell = JShell.create();
>> List<SnippetEvent> events = jshell.eval("2+2");
>> System.out.println(events.get(0).value());
>> 
>> And get the exception:
>> 
>> Exception in thread "Thread-0" java.lang.Error: iOS is not a supported OS platform.
>> 	at java.lang.ProcessImpl$Platform.get(ProcessImpl.java:171)
>> 	at java.lang.ProcessImpl.<clinit>(ProcessImpl.java:175)
>> 	at java.lang.ProcessBuilder.start(ProcessBuilder.java:1111)
>> 	at java.lang.ProcessBuilder.start(ProcessBuilder.java:1075)
>> 	at java.lang.Runtime.exec(Runtime.java:624)
>> 	at java.lang.Runtime.exec(Runtime.java:483)
>> 	at com.sun.tools.jdi.AbstractLauncher$Helper.launchAndAccept(AbstractLauncher.java:180)
>> 	at com.sun.tools.jdi.AbstractLauncher.launch(AbstractLauncher.java:132)
>> 	at com.sun.tools.jdi.SunCommandLineLauncher.launch(SunCommandLineLauncher.java:223)
>> 	at jdk.jshell.JDIConnection.launchTarget(JDIConnection.java:303)
>> 	at jdk.jshell.JDIConnection.open(JDIConnection.java:121)
>> 	at jdk.jshell.JDIEnv.init(JDIEnv.java:49)
>> 	at jdk.jshell.ExecutionControl.jdiGo(ExecutionControl.java:269)
>> 	at jdk.jshell.ExecutionControl.launch(ExecutionControl.java:71)
>> 	at jdk.jshell.JShell.executionControl(JShell.java:613)
>> 	at jdk.jshell.ClassTracker$ClassInfo.getReferenceTypeOrNull(ClassTracker.java:81)
>> 	at jdk.jshell.Unit.lambda$classesToLoad$3(Unit.java:266)
>> 	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1422)
>> 	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:591)
>> 	at jdk.jshell.Unit.classesToLoad(Unit.java:264)
>> 	at jdk.jshell.Eval.lambda$compileAndLoad$13(Eval.java:559)
>> 	at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:269)
>> 	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1422)
>> 	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
>> 	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
>> 	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
>> 	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
>> 	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:511)
>> 	at jdk.jshell.Eval.compileAndLoad(Eval.java:560)
>> 	at jdk.jshell.Eval.declare(Eval.java:462)
>> 	at jdk.jshell.Eval.declare(Eval.java:448)
>> 	at jdk.jshell.Eval.processExpression(Eval.java:291)
>> 	at jdk.jshell.Eval.eval(Eval.java:118)
>> 	at jdk.jshell.JShell.eval(JShell.java:350)
>> 	at EvalJava.main(EvalJava.java:14)
>> 
>> Is it possible to use jshell without exec’ing a process? Within the same process?
>> 
>> Thank you.
>> 
>> --
>> Best regards,
>> Grigory Ptashko
>> Software developer at Biblio-Globus Touroperator
>> g.ptashko at bgoperator.com
>> Phone: +7 495 5042500 ext 1557
>> Mobile: +7 916 1489766
>> 
> 


--
Best regards,
Grigory Ptashko

+7 (916) 1489766
grigory.ptashko at gmail.com
facebook.com/GrigoryPtashko