JEP 311: Java Packager API & CLI

[Michael Hall]

> On Oct 20, 2017, at 1:51 AM, Alan Bateman <Alan.Bateman at oracle.com> wrote:
> 
> On 19/10/2017 22:37, Michael Hall wrote:
>> :
>> Thanks. I couldn’t figure out how to use it with the current javapackager. It turned out I needed —add-modules, I’m new to modular concerns.
>> This was for JShell. It also seemed that this needed a java executable in the bin directory. I added that manually and was able to use JShell from a OS X java 9 application.
>> 
> I realize this is going off-topic but can you elaborate more on this. There should never be a need to copy binaries into the bin directory. The jdk.jshell module includes `jshell` launcher for example.

I got a JShell JRE with —add-modules
I initialize a JShell shell with…
	private static final JShell shell = JShell.create();
Without java in the bin directory the first time I try to use the shell with…

			List<SnippetEvent> result = shell.eval(sb.toString());
			for (SnippetEvent evt : result) {
				System.out.println(evt.value());
			}

I get…

int x = 5
java.lang.ExceptionInInitializerError
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.cmdline.psuedoGestalt.Runner.invoke(Runner.java:207)
	at org.cmdline.psuedoGestalt.Runner.runStatic(Runner.java:234)
	at org.cmdline.psuedoGestalt.Runner.runMain(Runner.java:226)
	at org.cmdline.psuedoGestalt.Runner.run(Runner.java:144)
Caused by: java.lang.IllegalStateException: Launching JShell execution engine threw: Failed remote listen: java.io.IOException: Cannot run program "/Users/mjh/HalfPipe/HalfPipe7.app/Contents/PlugIns/Java.runtime/Contents/Home/bin/java": error=2, No such file or directory @ com.sun.jdi.SocketListen (defaults: timeout=, port=, localAddress=) -- {timeout=timeout=5000, port=port=, localAddress=localAddress=127.0.0.1}
	at jdk.jshell/jdk.jshell.JShell.<init>(JShell.java:139)
	at jdk.jshell/jdk.jshell.JShell$Builder.build(JShell.java:405)
	at jdk.jshell/jdk.jshell.JShell.create(JShell.java:420)
	at us.hall.repl.JShellReplImpl.<clinit>(JShellReplImpl.java:8)
	... 8 more
Caused by: java.lang.InternalError: Failed remote listen: java.io.IOException: Cannot run program "/Users/mjh/HalfPipe/HalfPipe7.app/Contents/PlugIns/Java.runtime/Contents/Home/bin/java": error=2, No such file or directory @ com.sun.jdi.SocketListen (defaults: timeout=, port=, localAddress=) -- {timeout=timeout=5000, port=port=, localAddress=localAddress=127.0.0.1}
	at jdk.jshell/jdk.jshell.execution.JdiInitiator.reportLaunchFail(JdiInitiator.java:300)
	at jdk.jshell/jdk.jshell.execution.JdiInitiator.listenTarget(JdiInitiator.java:199)
	at jdk.jshell/jdk.jshell.execution.JdiInitiator.<init>(JdiInitiator.java:111)
	at jdk.jshell/jdk.jshell.execution.JdiDefaultExecutionControl.create(JdiDefaultExecutionControl.java:103)
	at jdk.jshell/jdk.jshell.execution.JdiExecutionControlProvider.generate(JdiExecutionControlProvider.java:148)
	at jdk.jshell/jdk.jshell.spi.ExecutionControl.generate(ExecutionControl.java:179)
	at jdk.jshell/jdk.jshell.spi.ExecutionControl.generate(ExecutionControl.java:296)
	at jdk.jshell/jdk.jshell.execution.FailOverExecutionControlProvider.generate(FailOverExecutionControlProvider.java:103)
	at jdk.jshell/jdk.jshell.spi.ExecutionControl.generate(ExecutionControl.java:179)
	at jdk.jshell/jdk.jshell.spi.ExecutionControl.generate(ExecutionControl.java:296)
	at jdk.jshell/jdk.jshell.JShell.<init>(JShell.java:136)
	... 11 more
Caused by: java.io.IOException: Cannot run program "/Users/mjh/HalfPipe/HalfPipe7.app/Contents/PlugIns/Java.runtime/Contents/Home/bin/java": error=2, No such file or directory
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1128)
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1071)
	at jdk.jshell/jdk.jshell.execution.JdiInitiator.listenTarget(JdiInitiator.java:173)
	... 20 more
Caused by: java.io.IOException: error=2, No such file or directory
	at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
	at java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:339)
	at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:270)
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1107)
	... 22 more