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Dylan Millikin edited comment on TINKERPOP-1232 at 3/22/16 10:20 PM:
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This is very interesting.
I'm especially looking forward to point 2).
For 3) : It might be good to cover some edge cases that need to be worked
around because of differences in language syntax/semantics. An example that
comes to mind would be {{has(label, "user")}} which is often either incorrect
code or expects a {{label}} var/class/etc to be defined. Yet writing it as
{{has("label", "user")}} can't be converted to string without some work.
I'm guessing some of these cases can be found for python as well.
Python is a great choice for these examples though. Easiest language to follow
regardless of your background.
was (Author: dmill):
This is very interesting.
I'm especially looking forward to point 2).
For 3) : It might be good to cover some edge cases that need to be worked
around because of differences in language syntax/semantics. An example that
comes to mind would be {{has(label, "user")}} which is often either incorrect
code or expects a {{label}} var/class/etc to be defined. Yet writing it as
{{has("label", "user")}} can't be converted to string without some work.
I'm guessing some of these can be found for python as well.
Python is a great choice for these examples though. Easiest language to follow
regardless of your background.
> Write a tutorial demonstrating the 3 ways to write a Gremlin language variant.
> ------------------------------------------------------------------------------
>
> Key: TINKERPOP-1232
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1232
> Project: TinkerPop
> Issue Type: Improvement
> Components: documentation
> Affects Versions: 3.1.1-incubating
> Reporter: Marko A. Rodriguez
>
> Talking with [~rustyrazorblade] about collaborating on a Gremlin tutorial for
> language designers. Here is what we came up with.
> We will use Python as the host language and demonstrate 3 ways to create
> Gremlin-Python.
> * Using Jython: With Jython you have direct access to the JVM and thus can
> call {{GraphTraversal}} methods directly. We can expose some Python sugar
> here and there to show why its good to have a language specific variant. See
> Gremlin-Scala for inspiration.
> * Using JNI: With Python, we have a {{PythonTraversal}} Python class. That
> class then uses Java Gateway to interact (via proxy) with {{GraphTraversal}}.
> This was done in the past as an experiment with R using rJava.
> * Using String: With Python, we have a {{PythonTraversal}} Python class where
> {{out("knows")}} simply appends {{"out(\"knows\")"}} to a string builder. The
> result can then be a String sent to a {{RemoteConnection}} for evaluation.
> These three models are the three ways in which any language can embed
> Gremlin.
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