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[tor-bugs] #18861 [Metrics/metrics-lib]: start thinking about using java8
#18861: start thinking about using java8
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Reporter: iwakeh | Owner: karsten
Type: task | Status: new
Priority: Medium | Milestone:
Component: Metrics/metrics-lib | Version:
Severity: Normal | Keywords:
Actual Points: | Parent ID:
Points: | Reviewer:
Sponsor: |
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a. Oracle issued the following more than a year ago
>Auto-update Notice and End of Public Updates for Oracle JDK 7
>
>As outlined in the Oracle JDK Support Roadmap, after April 2015, Oracle
will not >post further updates of Java SE 7 to its public download sites.
Customers who need >continued access to critical bug fixes and security
fixes as well as general >maintenance for Java SE 7 or older versions can
get long term support through Oracle >Java SE Support. The process of
migrating users from Java 7 to Java 8 through the >auto update feature is
expected to take place after the January 2015 CPU release.(quoted from
http://www.oracle.com/technetwork/java/javase/eol-135779.html)
a. OpenJDK8 has been available in stable debian for quite a while.
a. Java8 has matured by now, i.e. there were numerous updates since the
first release (cf. [http://www.oracle.com/technetwork/java/javase/8u-
relnotes-2225394.html here]).
a. [http://www.oracle.com/technetwork/java/javase/8-whats-new-2157071.html
Java8 features] like lambdas, streams, easy parallelization, performance
improvements for the `java.lang.String(byte[], *)` constructor and the
`java.lang.String.getBytes()` method, parallel array sorting, standard
encoding and decoding base64 might be quite useful for metrics-lib in
particular.
I think that switching to java8 in Onionoo, metrics-db, and metrics-lib
should not pose any problems.
I don't know about other projects that might use metrics-lib?
Using the new features could be done step by step, in special java8
branches.
The metrics-lib
[https://stem.torproject.org/_static/example/benchmark_metrics_lib.java
benchmark code] could be integrated in the test codebase for metrics-lib
and used for measuring performance.
Nothing very urgent, but it seems a good thing to start thinking about it
now.
(And ... Java9 is waiting around the corner ;-)
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18861>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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