[jira] [Closed] (DAFFODIL-1875) server mode for CLI

["Mike Beckerle (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DAFFODIL-1875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mike Beckerle closed DAFFODIL-1875.
-----------------------------------
    Resolution: Not A Problem

Wishlist

> server mode for CLI
> -------------------
>
>                 Key: DAFFODIL-1875
>                 URL: https://issues.apache.org/jira/browse/DAFFODIL-1875
>             Project: Daffodil
>          Issue Type: Improvement
>          Components: CLI
>    Affects Versions: 2.1.0
>            Reporter: Mike Beckerle
>            Priority: Minor
>
> A server behavior for Daffodil's CLI is needed.
> This allows many applications of daffodil parsing and unparsing to be performed but starting the daffodil CLI only once and loading the schemas only once.
> One simple way to do this is rather than executing a command and terminating, the CLI would enter a looping mode where it reads a command line from stdin, executes it, and repeats until EOF on the stdin.
> An alternative, but more complex thing to do is to implement the Language Server Protocol, which is intended to be for long-running servers that do things like compile and build.
> Note that this also adds extra complexity, extra socket permissions, and
>  potentially has issues with processor separation if multiple processes
>  can communicate with the same server. So this has security implications
>  as well. Might be fine for the CLI, but probably not for Java/Scala APIs.
> sbt has a server mode:
> [https://developer.lightbend.com/blog/2017-11-30-sbt-1-1-0-RC1-sbt-server/#sbt-server]
>  
> The LSP specification: 
> [https://microsoft.github.io/language-server-protocol/specification]
> See also DAFFOGIL-1563 which is about plug-ins that might want to make use of a server-mode long-running daffodil instance. Such a plug in might want to use an LSP-based Daffodil server.



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