Switch to new RSS feed

[pot]

This PR switches to oracle's java rss feed which appears to be more active (Last post was April) compared to the previous feed we were using. It also refractors the package handling rss feeds from javamail (which was the previous feed we used) to rss.

Merging this requires somebody with VPS access to add this to this feeds array:

          {
            "url": "https://blogs.oracle.com/java/rss",
            "targetChannelPattern": "java-news-and-changes",
            "dateFormatterPattern": "EEE, d MMM yyyy HH:mm:ss z"
          }

For the test I just added a new entry to the xml file (being served over a local http server) after starting the bot (system caches the latest posted date if its the first time reading this rss feed).

<item>
    <title>Announcing Test Test Test: Java Cryptographic Service Provider for FIPS Environments</title>
    <description>Announcing the release of Oracle Jipher, which is a Java Cryptographic Service Provider that packages a FIPS 140-validated OpenSSL cryptographic module. </description>
    <link>https://blogs.oracle.com/java/post/jipher-java-cryptographic-service-provider-for-fips-environments</link>
    <guid isPermaLink="false">CORE4DA742E94BEA4A8784D3A97FEC00EBC8</guid>
    <pubDate>Fri, 27 Jun 2025 16:16:00 GMT</pubDate>
   </item>

.

[CLAassistant]

All committers have signed the CLA.

[christolis]

LGTM

[tj-wazei]

Did some digging and this looks good.

Here's some context for the non-informed on the OpenJDK and Oracle feeds:

OpenJDK Feed

It's focus is:

• Covering all activity within the "JDK Updates"
• Low-level JDK update work including patches and JDK discussions

As OP stated, it's not updated as frequently as we'd like.

Oracle Java Blog Feed

It's focus is:

• Covering Java at Oracles POV such as product news, major releases, events etc.
• It's more "marketing friendly".

The latest OpenJDK update is Java 11.0.26+4 (GA) which was released in Jan 2025. While it's old, there was an update to the page a few days ago hence why it's showing on the feed.

The latest Oracle feed shows rando blogs but some of them are SUPER interesting. Some follow up work should be done to push those onto the server e.g. "Announcing Oracle GraalVM for JDK 24" - this is sick.

Anyways, good change, thanks!

[tj-wazei]

@christolis - I've resolved your comments since you've approved but make sure you do that before approving as it'll block merge.

[christolis]

@christolis - I've resolved your comments since you've approved but make sure you do that before approving as it'll block merge.

Forgot to do that, thanks for the reminder!