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https://issues.apache.org/jira/browse/TINKERPOP-2819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17630042#comment-17630042
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ASF GitHub Bot commented on TINKERPOP-2819:
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cole-bq commented on PR #1850:
URL: https://github.com/apache/tinkerpop/pull/1850#issuecomment-1306230628

   > In introducing the new `gremlin-util` module there should be some Upgrade 
Documentation to accompany this change. It should probably make note why this 
change isn't a breaking one and what impact it might have during upgrade.
   > 
   > Speaking of which, I can't think of a scenario where users should notice 
anything different in their upgrades unless they aren't using maven or 
something similar. If they were somehow manually managing jar files they might 
miss that `gremlin-util` was a new module i guess. I'd sorta advocated a hope 
for being able to test drivers along 3.5.x and 3.6.x so perhaps that swayed you 
in this direction. seeing it here gives me a bit of pause that we're going to 
somehow annoy folks by moving these classes about.
   > 
   > how do you feel about taking this a step more slowly? the work you've done 
here shows that the change could be made without breaking too much. if we 
really wanted to test 3.5.x/3.6.x we could in the future always backport this 
commit to these branches. so, you could just target master now with this commit 
as it is. introduce a follow-on commit that renames packages if you like as we 
can take a breaking change in 3.7.x. you do have the issue of groovy in 
gremlin-util but making a note of that in commit comment will remind us of that 
issue if we decided to backport the commit.
   
   This seems reasonable to me. At the moment it seems like bringing these 
changes into 3.5.x/3.6.x is more of a nice to have and not a pressing need. It 
is probably best to avoid any potential issues until a need arises (such as a 
large increase in connection related issues with some of the GLV's).




> Refactor SimpleSocketServer to be accessible to all GLV's
> ---------------------------------------------------------
>
>                 Key: TINKERPOP-2819
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2819
>             Project: TinkerPop
>          Issue Type: Improvement
>          Components: driver
>            Reporter: Cole Greer
>            Priority: Major
>
> Currently there is a large gap in the testing capabilities of the java driver 
> compared to the other GLV's. Part of this gap is the java driver has 
> SimpleSocketServer which provides a useful platform to write tests which 
> require specific response behaviour from the server. Having such a tool for 
> all of the GLV's would allow for testing of many more potential failure cases 
> as well as taking a step towards standardizing the testing approach for all 
> GLV's.
> This work can be divided into 2 main parts.
> Part One: Decoupling SimpleSocketServer from the java driver. This is the 
> most disruptive part of the proposed changes. This has already been discussed 
> [here|https://lists.apache.org/thread/vd7w43xjzvc5rr0135gql9mxhdlcltr9] on 
> the dev list but I will summarize. To avoid having all the GLV's depending on 
> the java driver, SimpleSocketServer and it's related classes should be 
> extracted to a new module gremlin-tools/gremlin-socket-server. Unfortunately 
> the socket server still relies on the following classes in gremlin driver:
> tinkerpop.gremlin.driver.message.*
> tinkerpop.gremlin.driver.ser.*
> tinkerpop.gremlin.driver.MessageSerializer
> tinkerpop.gremlin.driver.Tokens
> To avoid a cyclic dependency between gremlin-driver and 
> gremlin-socket-server. these classes should be moved to another new module 
> gremlin-util which will house any classes which are to be shared between the 
> driver and server. Moving these classes to a new module and package will 
> break import lines and will need to be left until 3.7. If this added testing 
> capability is desired in 3.5 a potential solution is to move the classes to 
> the gremlin-util module, but leave them in the gremlin.driver package. In 
> initial tests this seems to work without issue although it is an unusual way 
> to structure the code and should not be considered a long term solution.
> The second part of this refactor is to reconfigure the newly extracted 
> gremlin-socket-server to be usable by all of the GLV's. My initial thoughts 
> are to dockerize the server and have the container run during the testing 
> phase of the GLV's. There is still some consideration to be done as to how 
> the GLV's should best interact with this server. Currently Junit will start 
> and stop the server for each individual test, each test has direct access to 
> the server object and can control it as needed. The GLV's will not have the 
> same direct control over the server. Any control options or behaviour needed 
> will either need to be encoded in the server itself as custom behaviour 
> triggered by specific request ID's or control through some external wrapper 
> or interface around the server. There is still consideration needed as to how 
> this should be done. Any comments on desired functionality or behaviour would 
> be greatly appreciated.



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