Using jshell with libraries

[Sam Pullara]

Let's say I want to send someone a jshell script that accesses S3. What do
I tell them to do before running it? I'm not intending on using jshell for
exploration but for running scripts. Even if I was though, I would just add
those same artifacts to maven.

UPDATE: While I was writing this I realize that you all didn't intend it to
work this way at all and that it is supposed to be purely interactive. I
don't know how you arrived at that decision but not being able to use it
with

#!/usr/bin/jshell
...script...

is very surprising since the other normal repls like python, etc intend
them to be used either for scripting or interactively. It deeply surprises
me that jshell doesn't ignore the #! at the beginning and still outputs all
its normal stuff when run in that way and ultimately enters interactive
mode. Big miss imho. Guess I will move on since the intended use cases
don't match up with my expectations.

That said, I agree with you that the compiler should also resolve
dependencies and we failed to make a module system that handled
dependencies. Still saddens me that the module system is focused on access
control rather than dependency resolution. I was on the original JSR and
pushed as hard as I could for that for years.

Sam


On Tue, Mar 20, 2018 at 8:51 PM, Robert Field <robert.field at oracle.com>
wrote:

> [Add cc: kawasima]
>
> Hi Sam,
>
> We have talked about this, but not talked it to death.  Mostly what we
> talked about are ways to make functionality like this available as a
> plug-in to JShell.
>
> Can you help my understanding of how you use these tools: once you have
> done your exploration with jshell/try-artifact, do you then download and
> use -classpath on the compiler or... ?
>
> Thanks,
> Robert
>
>
>
>
> On 03/20/18 15:26, Sam Pullara wrote:
>
>> Hi all,
>>
>> I don't know if you all have talked this to death but the jshell as it
>> exists today isn't that useful to me because almost all my use cases
>> require either 3rd party libraries or local code. Downloading the code and
>> setting the classpath in each environment I want to use it doesn't seem
>> that great. So instead, I have been using a jshell variant:
>> https://github.com/kawasima/try-artifact . The variant lets me easily add
>> 3rd party dependencies in the shell from the central maven repository so
>> you can do things like:
>>
>> |  Welcome to JShell -- Version (version info not available)
>>
>> |  Type /help for help
>>
>>
>> -> /resolve com.amazonaws:aws-java-sdk-s3:1.11.297
>>
>> |  Path /Users/sam/.m2/repository/com/amazonaws/aws-java-sdk-s3/1.11
>> .297/aws-java-sdk-s3-1.11.297.jar added to classpath
>>
>> |  Path /Users/sam/.m2/repository/com/amazonaws/aws-java-sdk-kms/1.1
>> 1.297/aws-java-sdk-kms-1.11.297.jar added to classpath
>>
>> |  Path /Users/sam/.m2/repository/com/amazonaws/aws-java-sdk-core/1.
>> 11.297/aws-java-sdk-core-1.11.297.jar added to classpath
>>
>> |  Path /Users/sam/.m2/repository/commons-logging/commons-logging/1.
>> 1.3/commons-logging-1.1.3.jar
>> added to classpath
>>
>> |  Path /Users/sam/.m2/repository/org/apache/httpcomponents/httpclie
>> nt/4.5.5/httpclient-4.5.5.jar
>> added to classpath
>>
>> |  Path /Users/sam/.m2/repository/org/apache/httpcomponents/httpcore
>> /4.4.9/httpcore-4.4.9.jar
>> added to classpath
>>
>> |  Path /Users/sam/.m2/repository/commons-codec/commons-codec/1.10/
>> commons-codec-1.10.jar
>> added to classpath
>>
>> |  Path /Users/sam/.m2/repository/software/amazon/ion/ion-java/1.0.
>> 2/ion-java-1.0.2.jar
>> added to classpath
>>
>> |  Path /Users/sam/.m2/repository/com/fasterxml/jackson/core/jackson
>> -databind/2.6.7.1/jackson-databind-2.6.7.1.jar added to classpath
>>
>> |  Path /Users/sam/.m2/repository/com/fasterxml/jackson/core/jackson
>> -annotations/2.6.0/jackson-annotations-2.6.0.jar added to classpath
>>
>> |  Path /Users/sam/.m2/repository/com/fasterxml/jackson/core/jackson
>> -core/2.6.7/jackson-core-2.6.7.jar added to classpath
>>
>> |  Path /Users/sam/.m2/repository/com/fasterxml/jackson/dataformat/j
>> ackson-dataformat-cbor/2.6.7/jackson-dataformat-cbor-2.6.7.jar added to
>> classpath
>>
>> |  Path /Users/sam/.m2/repository/joda-time/joda-time/2.8.1/joda-
>> time-2.8.1.jar
>> added to classpath
>>
>> |  Path /Users/sam/.m2/repository/com/amazonaws/jmespath-java/1.11.2
>> 97/jmespath-java-1.11.297.jar
>> added to classpath
>>
>>
>> -> var s3 = new com.amazonaws.services.s3.AmazonS3Client()
>>
>> |  Added variable s3 of type com.amazonaws.services.s3.AmazonS3Client
>> with
>> initial value com.amazonaws.services.s3.AmazonS3Client at 463b4ac8
>>
>>
>>
>> Which is obviously much easier than downloading the artifacts and managing
>> the classpath. Has there been much thought in adding something like this
>> to
>> the jshell that comes with the JDK?
>>
>> Sam
>>
>
>