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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5955) Prepare Derby to run with Compact Profiles (JEP 161)
Date Mon, 17 Dec 2012 12:24:17 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13533877#comment-13533877

Knut Anders Hatlen commented on DERBY-5955:

The version 2 patch seems to preserve the original functionality and interfaces, as far as
I can tell, and I think the new hierarchy is better structured, so it looks like a net improvement
to me.

There seems to be one added piece of functionality in the patch: EmbeddedSimpleDataSource
now implements the setAttributesAsPassword() method supported by the other embedded data sources.
But that looks like an improvement too.

Some minor comments:

- There's some odd formatting. Most of it because already poorly formatted code was moved
(like the equals() method moved from EmbeddedDataSource to EmbeddedBaseDataSource). And in
EmbeddedDataSourceInterface the indentation alternates between 3 and 4. I see you've already
removed tabs from the copied/moved code. Maybe you can take it one step further and tell your
favourite IDE to reformat the entire EmbeddedBaseDataSource and EmbeddedDataSourceInterface
files? Since those are new files, reformatting them won't make archeology any harder.

- A static field STRING_ARG is added to EmbeddedDataSource, but it's never used.

- Some code is added to the JDBCDataSource test in order to preserve stack trace and exception
chain in case of failure. Would a call to BaseTestCase.fail(String,Throwable) do the same
> Prepare Derby to run with Compact Profiles (JEP 161)
> ----------------------------------------------------
>                 Key: DERBY-5955
>                 URL: https://issues.apache.org/jira/browse/DERBY-5955
>             Project: Derby
>          Issue Type: Improvement
>          Components: Documentation, JDBC, Services, SQL
>            Reporter: Dag H. Wanvik
>            Assignee: Dag H. Wanvik
>         Attachments: apidiff.zip, client-graph.png, derby-5955-embed-restructure-01.diff,
derby-5955-embed-restructure-01.stat, derby-5955-embed-restructure-02.diff, derby-5955-embed-restructure-02.stat,
derby-5955-proof-of-concept-2.diff, derby-5955-proof-of-concept-2.stat, derby-5955-proof-of-concept.diff,
derby-5955-proof-of-concept.stat, derby-5955-ser.zip, embedded-graph.png, old-client-graph.png,
old-embedded-graph.png, publishedapi.zip, publishedapi.zip
> While waiting for a Java module system (aka project Jigsaw), it has been decided to define
a few subsets of the Java SE Platform Specification, cf JEP 161 ( http://openjdk.java.net/jeps/161).
> A quote from the JEP: "More broadly, this feature is intended to enable the migration
of applications currently built on top of the Java ME Connected Device Configuration (CDC)
to appropriate Profiles of the Java SE Platform, part of the long-term effort to converge
CDC with Java SE."
> It would be good if we make Derby to run on such limited profiles. The current proposal
places JDBC in Compact Profile 2 (cf. link above), while other libraries used by Derby, e.g.
javax.naming (JNDI) are in Profile 3 (larger).
> It would be good if Derby could run on the smallest posible platform, i.e. Profile 2,
but that will probably involve some changes to make Derby gracefully limit functionality when
some libraries are missing.

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