InternalAPIsUnavailableInJava9

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Revision as of 10:14, 22 May 2015

Contents

Internal JDK APIs Unavailable In Java 9

With Java 9 coming we have to prepare for several big changes which will affect NetBeans and might break the code. One such change is that bunch of internal APIs from JDK 8 and older will become really JDK internal and will not be accessible from NetBeans. Internal APIs will not be accessible when JDK 9 module boundaries will be in place. We have to therefore replace these APIs with new one. This document serves for tracking NetBeans packages which are affected, list some already published replacement/workarounds. We will use this doc to make sure NetBeans version supposed to be running on Java 9 will be ready on time re internal API usage.

jdeps tool

We used jdeps tool to search for what Java internal APIs we are using. It lists also some examples how to replace obsolete internal APIs with new public ones. It is recommended that every NetBeans module developer runs jdeps on his modules and does not depend solely on this table.

sun.* packages

APIs under sun.* will be Java private one and will not be accessible from within NetBeans sources. Here is the list of NetBeans modules and what sun.* packages were found.

Owner Resolved/Comment NetBeans module Internal Java API being used
mromashova@netbeans.org dlight.remote sun.awt.shell.ShellFolder, sun.swing.FilePane, un.swing.WindowsPlacesBar
phejl@netbeans.org glassfish.common sun.misc.BASE64Encoder, sun.net.NetProperties
phejl@netbeans.org web.jspparser sun.misc.SharedSecrets, sun.misc.ClassLoaderUtil
thurka@netbeans.org jconsole sun.jvmstat.monitor.*, sun.management.ConnectorAddressLink, sun.tools.jconsole.JConsole
thurka@netbeans.org lib.profiler sun.jvmstat.monitor.*
thurka@netbeans.org profiler.heapwalker sun.misc.VM
thurka@netbeans.org profiler.snaptracer sun.swing.plaf.synth.SynthIcon
thurka@netbeans.org lib.profiler.charts sun.swing.SwingUtilities2
thurka@netbeans.org profiler.oql sun.misc.Ref
thurka@netbeans.org sampler sun.management.ThreadInfoCompositeData
thurka@netbeans.org traceio sun.misc.IoTrace
tstupka@netbeans.org kenai sun.misc.BASE64Encoder
ovrabec@netbeans.org o.n.swing.dirchooser sun.awt.shell.ShellFolder
jhavlin@netbeans.org openide.filesystems sun.security.tools.KeyTool, sun.security.tools.JarSigner
tmysik@netbeans.org php.dbgp sun.misc.BASE64Encoder
lfischmeistr@netbeans.org core.network sun.net.spi.DefaultProxySelector, sun.net.NetProperties
saubrecht@netbeans.org core.windows sun.awt.X11.XToolkit, sun.awt.X11.XWM, sun.swing.plaf.synth.SynthIcon
mentlicher@netbeans.org debugger.jpda sun.reflect.DelegatingClassLoader, sun.font.AttributeMap, sun.reflect.ReflectionFactory, sun.awt.X11.XAwtState, sun.awt.X11.XBaseWindow, sun.awt.X11.XToolkit, sun.awt.X11.XAtom
mentlicher@netbeans.org debugger.jpda.visual sun.misc.Launcher$AppClassLoader
mmetelka@netbeans.org editor sun.awt.AppContext
lfischmeistr@netbeans.org o.n.bootstrap sun.awt.AppContext
ovrabec@netbeans.org o.n.swing.dirchooser sun.swing.WindowsPlacesBar, sun.awt.shell.ShellFolder
saubrecht@netbeans.org o.n.swing.plaf sun.swing.plaf.synth.SynthUI
jpeska@netbeans.org openide.explorer sun.beans.editors.EnumEditor
mmetelka@netbeans.org openide.text sun.awt.im.InputContext, sun.awt.im.InputMethodContext
ovrabec@netbeans.org openide.util sun.awt.AppContext
mkristofic@netbeans.org spi.editor.hints sun.swing.plaf.synth.SynthIcon

com.sun.* packages

Some packages from com.sun will become public API in Java 9. These are:

  • com.sun.source.*
  • com.sun.jdi
  • com.sun.tools.javac.* is exported, subpackages will be internal

As the source of intermediate info about what packages will be exported from Java 9 you can refer to modules.xml for Java 9 modules being API. This info/mechanism can change (modules.xml can be replaced by something different) once Java 9 implementation proceeds further to Feature complete and release. Following table lists NetBeans modules which utilizes com.sun.* internal APIs which will be internal in Java 9. com.sun.source usage and com.sun.jdi usage were removed from this list.

Owner Resolved/Comment NetBeans module Internal Java API being used
mbalin@netbeans.org javacard.* com.sun.javacard.*
thurka@netbeans.org jconsole com.sun.jmx.*
phejl@netbeans.org web.el com.sun.el.parser.*
phejl@netbeans.org web.jsf.editor com.sun.faces.*
jstola@netbeans.org websvc.* com.sun.tools.ws.*, com.sun.xml.ws.*, com.sun.xml.rpc.*
sdedic@netbeans.org java.source com.sun.tools.javac.* - Listed for completness, nbjavac contains this. (only this package exported, subpackages are not)
mentlicher@netbeans.org debugger.jpda.visual com.sun.media.jfxmedia.*
mkozeny@netbeans.org apisupport.feedreader com.sun.syndication.*
mentlicher@netbeans.org debugger.jpda.visual com.sun.javafx.runtime.*
jstola@netbeans.org core.browser.webview com.sun.javafx.scene.web.Debugger
mentlicher@netbeans.org debugger.jpda.visual com.sun.javafx.tk.*
saubrecht@netbeans.org o.n.swing.plaf com.sun.java.swing.plaf.gtk.GTKLookAndFeel, com.sun.java.swing.plaf.windows.WindowsLookAndFeel
lfischmeistr@netbeans.org o.n.bootstrap com.sun.jnlp.JNLPClassLoader
lfischmeistr@netbeans.org core.startup com.sun.java.swing.plaf.gtk.GTKLookAndFeel, com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel, com.sun.java.swing.plaf.windows.WindowsLookAndFeel
identity.profile.api com.sun.identity.*
petrk@netbeans.org cnd.modelimpl com.sun.org.apache.xerces.*, com.sun.org.apache.xml.*
rsvitanic@netbeans.org deployment.deviceanywhere com.sun.xml.stream.ZephyrParserFactory

Reflection

It should be be possible to use reflection to call Java internal APIs even after module boundaries will be in place. It will be likely necessary to call setAccessible(true) for elements which needs to be called via reflection. At this moment it is not 100% confirmed it will work this way or setAccessible(true) will be needed.

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