[Cruisecontrol-devel] Cruisecontrol dependencies on JDK-Internal APIs

[Rory O'Donnell]

Hi Kent,

As part of the preparations for JDK 9, Oracle’s engineers have been
analyzing open source projects like yours to understand usage. One area
of concern involves identifying compatibility problems, such as reliance
on JDK-internal APIs.

Our engineers have already prepared guidance on migrating some of the
more common usage patterns of JDK-internal APIs to supported public
interfaces. The list is on the OpenJDK wiki [0].

As part of the ongoing development of JDK 9, I would like to inquire
about your usage of JDK-internal APIs and to encourage migration
towards supported Java APIs if necessary.

The first step is to identify if your application(s) is leveraging
internal APIs.

/Step 1: Download JDeps. /

Just download a preview release of JDK8(JDeps Download
<https://jdk8.java.net/download.html>). You do not need to actually
test or run your application on JDK8. JDeps(Docs
<http://docs.oracle.com/javase/8/docs/technotes/tools/unix/jdeps.html>)
looks through JAR files and identifies which JAR files use internal
APIs and then lists those APIs.

/Step 2: To run JDeps against an application/. The command looks like:

jdk8/bin/jdeps -P -jdkinternals *.jar > your-application.jdeps.txt

The output inside your-application.jdeps.txt will look like:

your.package (Filename.jar)
-> com.sun.corba.se JDK internal API (rt.jar)

_3rd party library using Internal APIs:_
If your analysis uncovers a third-party component that you rely on, you
can contact the provider and let them know of the upcoming changes. You
can then either work with the provider to get an updated library that
won't rely on Internal APIs, or you can find an alternative provider for
the capabilities that the offending library provides.

_Dynamic use of Internal APIs:_
JDeps can not detect dynamic use of internal APIs, for example through
reflection, service loaders and similar mechanisms.

Rgds,Rory

[0] https://wiki.openjdk.java.net/display/JDK8/Java+Dependency+Analysis+Tool

[Rory O'Donnell]

Hi Kent,

Just checking in with you, have you had a chance to check for
dependencies on JDK-Internal APIs ?

Rgds,Rory

Post by Rory O'Donnell
Hi Kent,
As part of the preparations for JDK 9, Oracle’s engineers have been
analyzing open source projects like yours to understand usage. One
area of concern involves identifying compatibility problems, such as
reliance on JDK-internal APIs.
Our engineers have already prepared guidance on migrating some of the
more common usage patterns of JDK-internal APIs to supported public
interfaces. The list is on the OpenJDK wiki [0].
As part of the ongoing development of JDK 9, I would like to inquire
about your usage of JDK-internal APIs and to encourage migration
towards supported Java APIs if necessary.
The first step is to identify if your application(s) is leveraging
internal APIs.
/Step 1: Download JDeps. /
Just download a preview release of JDK8(JDeps Download
<https://jdk8.java.net/download.html>). You do not need to
actually test or run your application on JDK8. JDeps(Docs
<http://docs.oracle.com/javase/8/docs/technotes/tools/unix/jdeps.html>)
looks through JAR files and identifies which JAR files use
internal APIs and then lists those APIs.
jdk8/bin/jdeps -P -jdkinternals *.jar > your-application.jdeps.txt
your.package (Filename.jar)
-> com.sun.corba.se JDK internal API (rt.jar)
_3rd party library using Internal APIs:_
If your analysis uncovers a third-party component that you rely on,
you can contact the provider and let them know of the upcoming
changes. You can then either work with the provider to get an updated
library that won't rely on Internal APIs, or you can find an
alternative provider for the capabilities that the offending library
provides.
_Dynamic use of Internal APIs:_
JDeps can not detect dynamic use of internal APIs, for example through
reflection, service loaders and similar mechanisms.
Rgds,Rory
[0]
https://wiki.openjdk.java.net/display/JDK8/Java+Dependency+Analysis+Tool
--
Rgds,Rory O'Donnell
Quality Engineering Manager
Oracle EMEA , Dublin, Ireland

[Rory O'Donnell]

Hi,

Just checking if anyone has been able to check this ?

Rgds,Rory

Post by Rory O'Donnell
Hi Kent,
Just checking in with you, have you had a chance to check for
dependencies on JDK-Internal APIs ?
Rgds,Rory

Post by Rory O'Donnell
Hi Kent,
As part of the preparations for JDK 9, Oracle’s engineers have been
analyzing open source projects like yours to understand usage. One
area of concern involves identifying compatibility problems, such as
reliance on JDK-internal APIs.
Our engineers have already prepared guidance on migrating some of the
more common usage patterns of JDK-internal APIs to supported public
interfaces. The list is on the OpenJDK wiki [0].
As part of the ongoing development of JDK 9, I would like to inquire
about your usage of JDK-internal APIs and to encourage migration
towards supported Java APIs if necessary.
The first step is to identify if your application(s) is leveraging
internal APIs.
/Step 1: Download JDeps. /
Just download a preview release of JDK8(JDeps Download
<https://jdk8.java.net/download.html>). You do not need to
actually test or run your application on JDK8. JDeps(Docs
<http://docs.oracle.com/javase/8/docs/technotes/tools/unix/jdeps.html>)
looks through JAR files and identifies which JAR files use
internal APIs and then lists those APIs.
jdk8/bin/jdeps -P -jdkinternals *.jar > your-application.jdeps.txt
your.package (Filename.jar)
-> com.sun.corba.se JDK internal API (rt.jar)
_3rd party library using Internal APIs:_
If your analysis uncovers a third-party component that you rely on,
you can contact the provider and let them know of the upcoming
changes. You can then either work with the provider to get an updated
library that won't rely on Internal APIs, or you can find an
alternative provider for the capabilities that the offending library
provides.
_Dynamic use of Internal APIs:_
JDeps can not detect dynamic use of internal APIs, for example
through reflection, service loaders and similar mechanisms.
Rgds,Rory
[0]
https://wiki.openjdk.java.net/display/JDK8/Java+Dependency+Analysis+Tool
--
Rgds,Rory O'Donnell
Quality Engineering Manager
Oracle EMEA , Dublin, Ireland

--
Rgds,Rory O'Donnell
Quality Engineering Manager
Oracle EMEA , Dublin, Ireland