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From ottobackwards <>
Subject [GitHub] metron pull request #638: METRON-933 New stellar function for regex group ca...
Date Fri, 07 Jul 2017 18:59:07 GMT
GitHub user ottobackwards opened a pull request:

    METRON-933 New stellar function for regex group capture

    New Stellar function for capturing a group from a Regex Pattern.
    I created a new RegExFunctions in Stellar for this, and moved the existing RegEx Match
function there.
    I also created the corresponding test class, and added a test for the existing RegEx Match
function as well, since there didn't seem to be one.
    To support these functions I created a thread local cache for compiled Pattern objects.
    Testing -> Build, run tests
    Start stellar shell and execute the functions.
    ### For all changes:
    - [x ] Is there a JIRA ticket associated with this PR? If not one needs to be created
at [Metron Jira](

    - [x ] Does your PR title start with METRON-XXXX where XXXX is the JIRA number you are
trying to resolve? Pay particular attention to the hyphen "-" character.
    - [x ] Has your PR been rebased against the latest commit within the target branch (typically
    ### For code changes:
    - [ x] Have you included steps to reproduce the behavior or problem that is being changed
or addressed?
    - [ x] Have you included steps or a guide to how the change may be verified and tested
    - [x ] Have you ensured that the full suite of tests and checks have been executed in
the root incubating-metron folder via:
      mvn -q clean integration-test install && build_utils/ 
    - [x ] Have you written or updated unit tests and or integration tests to verify your
    - [ ] If adding new dependencies to the code, are these dependencies licensed in a way
that is compatible for inclusion under [ASF 2.0](

    - [ ] Have you verified the basic functionality of the build by building and running locally
with Vagrant full-dev environment or the equivalent?
    ### For documentation related changes:
    - [x ] Have you ensured that format looks appropriate for the output in which it is rendered
by building and verifying the site-book? If not then run the following commands and the verify
changes via `site-book/target/site/index.html`:
      cd site-book
      mvn site
    #### Note:
    Please ensure that once the PR is submitted, you check travis-ci for build issues and
submit an update to your PR as soon as possible.
    It is also recommended that [travis-ci]( is set up for your personal
repository such that your branches are built there before submitting a pull request.

You can merge this pull request into a Git repository by running:

    $ git pull stellar_regex_capture

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #638
commit 3d7a79d2afaeb521113f1d77ba6211a0a52e8401
Author: Otto Fowler <>
Date:   2017-07-07T18:52:04Z

    New stellar function for regex group capture
    Create a test for existing regex match function
    Move both to RegExFunctions
    Create a cache for compiled patterns (thread local)


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