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DevNexus 2019: Migrating to Java 11

The document outlines the migration to Java 11 from earlier versions, highlighting new features and significant changes, including the removal of certain packages, classes, and methods. It provides strategies for addressing migration concerns and introduces tools available for scanning application binaries and source code to identify potential issues. The agenda includes future Java timelines and resources for further guidance on the migration process.

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Migrating to Java 11 1DEVNEXUS 2019 Dalia Abo Sheasha WebSphere Migration Tools Development Lead Email: dalia@us.ibm.com Twitter: @DaliaShea
Agenda 2DEVNEXUS 2019 • Background • Java 9/10/11: New Features • Java 8 -> Java 11: Migration Concerns • Removed Packages/Classes/Methods • Migration Tools
DEVNEXUS 2019 Java Timeline (Current) 2012 2014 2017 2018 2019 Sept2017 Java 9 March2018 Java 10 Java 12 March2019 July2011 Java 7 (LTS) March2014 Java 8 (LTS) Sept2018 Java 11 (LTS)
DEVNEXUS 2019 Java Timeline (Future ) 2014 2017 2018 Sept2018 2019Sept2017 March2018 Java 11 Java 9 Java 10 Java 12 March2019 March2014 Java 8 2020 2021 2022 Java 13 Java 14 Java 15 Java 16 Java 17 (LTS) (LTS) (LTS)
5DEVNEXUS 2019 Java 9/10/11: New Features Tons of Features! • ( JDK 9, JDK 10, JDK 11 ) • var for local variables (JEP 286) • Launch Single-File Source-Code Programs (JEP 330) • New methods in several classes (Optional, Collection, etc) • TLS 1.3 • …
Java 9/10/11: Modularity 6DEVNEXUS 2019 • Java Platform Module System (JPMS) • Breaks code into modules containing packages • Applications must declare dependency on modules for access • Very disruptive • “Kill switch” on by default (currently) • --illegal-access=permit
7DEVNEXUS 2019 Java 8 -> Java 11
Java 8 -> Java 11: Migration Concerns 8DEVNEXUS 2019 • Removals • Packages, classes and methods • Previously deprecated • General Migration Strategy: Replace • Not previously deprecated • General Migration Strategy: Depends… • Behavior changes • Information Source: Java 9/10/11 compatibility guides and release notes
Java 8 -> Java 11: Removed Packages/Classes 9DEVNEXUS 2019 Removed Security classes: • com.sun.security.auth.PolicyFile • com.sun.security.auth.SolarisNumericGroupPrincipal • com.sun.security.auth.SolarisNumericUserPrincipal • com.sun.security.auth.SolarisPrincipal • com.sun.security.auth.X500Principal • com.sun.security.auth.callback.DialogCallbackHandler • com.sun.security.auth.module.SolarisLoginModule • com.sun.security.auth.module.SolarisSystem • javax.security.auth.Policy Java 8 Java 11
Java 8 -> Java 11: Removed Packages/Classes 10DEVNEXUS 2019 Removed AWT APIs: • java.awt.peer.* • java.awt.dnd.peer.* • com.sun.awt.AWTUtilities Removed DOM APIs: • com.sun.java.browser.plugin2.DOM • sun.plugin.dom.DOMObject Removed Misc: • com.sun.image.codec.jpeg.* • com.sun.xml.internal.bind.*
11DEVNEXUS 2019 Java 8 -> Java 11: Removed Java EE Modules java.activation javax.activation java.corba javax.rmi javax.rmi.CORBA org.omg.CORBA org.omg.CORBA_2_3 org.omg.CORBA_2_3.portable org.omg.CORBA.* org.omg.CosNaming ... org.omg.PortableInterceptor org.omg.PortableInterceptor.* org.omg.PortableServer org.omg.PortableServer.* org.omg.SendingContext org.omg.stub.java.rmi java.transaction javax.transaction java.xml.bind javax.xml.bind javax.xml.bind.annotation javax.xml.bind.annotation.adapters javax.xml.bind.attachment javax.xml.bind.helpers javax.xml.bind.util java.xml.ws javax.jws javax.jws.soap javax.xml.soap javax.xml.ws javax.xml.ws.handler javax.xml.ws.handler.soap javax.xml.ws.http javax.xml.ws.soap javax.xml.ws.spi javax.xml.ws.spi.http javax.xml.ws.wsaddressing java.xml.ws.annotation javax.annotation Option 1: package your own dependencies Option 2: rely on the app server to provide them (OpenLiberty with Java 11)
Java 8 -> Java 11: Removed Methods 12DEVNEXUS 2019 Removed java.lang.SecurityManager Methods: • java.lang.SecurityManager.checkAwtEventQueueAccess • java.lang.SecurityManager.checkSystemClipboardAccess • java.lang.SecurityManager.checkMemberAccess • java.lang.SecurityManager.checkTopLevelWindow • java.lang.SecurityManager.classDepth • java.lang.SecurityManager.classLoaderDepth • java.lang.SecurityManager.currentClassLoader • java.lang.SecurityManager.currentLoadedClass • java.lang.SecurityManager.getInCheck • java.lang.SecurityManager.inClass • java.lang.SecurityManager.inClassLoader Java 8 Java 11
Java 8 -> Java 11: Removed Methods 13DEVNEXUS 2019 Removed java.lang.Thread Methods: • java.lang.Thread.destroy() • java.lang.Thread.stop(java.lang.Throwable) Removed java.lang.Runtime Methods: • java.lang.Runtime.getLocalizedInputStream • java.lang.Runtime.getLocalizedOutputStream • java.lang.Runtime.runFinalizersOnExit Removed java.lang.System Method: • java.lang.System.runFinalizersOnExit
Java 8 -> Java 11: Removed Methods 14DEVNEXUS 2019 Removed java.util.logging.LogManager Methods: • java.util.logging.LogManager.addPropertyChangeListener • java.util.logging.LogManager.removePropertyChangeListener Removed java.util.jar.Pack200.Packer/Unpacker Methods: • java.util.jar.Pack200.Packer.addPropertyChangeListener • java.util.jar.Pack200.Packer.removePropertyChangeListener • java.util.jar.Pack200.Unpacker.addPropertyChangeListener • java.util.jar.Pack200.Unpacker.removePropertyChangeListener
Java 8 -> Java 11: Other Changes 15DEVNEXUS 2019 Technology Removal: • Java Web Start • JavaFX (separate product) Other Removals: • @jdk.Exported • netdoc protocol handler Behavior changes • java.lang.Class.getAnnotation() • java.nio.channels.DatagramChannel.send() And much more… • Oracle JDK 11 Migration Guide
16DEVNEXUS 2019 Java 8 -> Java 11 Where do I start?
17DEVNEXUS 2019 Application Binary Scanner Tool • Download: https://developer.ibm.com/wasdev/downloads/#asset/tools- Migration_Toolkit_for_Application_Binaries • Command Line tool (Runs with Java 7 and later) • Scans application binaries • Accepts .ear/.war files (and .jar files with --analyze option) • No app server required • Flags potential migration issues for a variety of scenarios • Java SE versions • On-premise -> Cloud • Others…
18DEVNEXUS 2019 Demo: Application Binary Scanner Tool
19DEVNEXUS 2019 Application Source Scanner Tool • Download: https://developer.ibm.com/wasdev/downloads/#asset/tools- WebSphere_Application_Server_Migration_Toolkit • Eclipse Plugin • Scans application source code • Flags potential migration issues for a variety of scenarios including Java SE versions • Click-and-go to affected code line • Documentation • See Chapter 3-4 for installation details
20DEVNEXUS 2019 Demo: Application Source Scanner Tool
21DEVNEXUS 2019 Java class dependency analyzer (Jdeps) • Command utility shipped with JDK • Multiple Options • Migration Relevant Option: -jdkinternals • Accepts jars, class files, directories • Binary scanner and source scanner will recommend if applicable • Limitations • Subset of removed APIs • No method removal flagging • Java version specific (i.e. running Jdeps shipped with Java 8 is different than Java 11) • Documentation
22DEVNEXUS 2019 TL;DR 1. Download the Binary scanner: https://developer.ibm.com/wasdev/downloads/#asset/tools- Migration_Toolkit_for_Application_Binaries 2. Follow the prompts to install the jar. 3. Run the binary scanner against your application binaries. Here is my command: java -jar binaryAppScanner.jar C:AppsMyApplication.war --sourceAppServer=liberty -- targetAppServer=liberty --sourceJava=ibm8 --targetJava=openjdk11 • Command help: • java -jar binaryAppScanner.jar --help • java -jar binaryAppScanner.jar --help --analyze 4. Review the report and read the help for each flagged issue to resolve them.
References/Resources 23DEVNEXUS 2019 • My Blog on adding the Java 11 feature to the migration tools (https://developer.ibm.com/tutorials/migration-to-java-11- made-easy/) • Binary Scanner – see the Additional information section (https://developer.ibm.com/wasdev/downloads/#asset/tools- Migration_Toolkit_for_Application_Binaries) • Source Scanner – see the Additional information section (https://developer.ibm.com/wasdev/downloads/#asset/tools- WebSphere_Application_Server_Migration_Toolkit) • Oracle Java SE Support Roadmap (https://www.oracle.com/technetwork/java/java-se-support-roadmap.html) • Oracle JDK Migration Guide (https://docs.oracle.com/en/java/javase/11/migrate/index.html) • AdoptOpenJDK (https://adoptopenjdk.net) • Migrating from Oracle Java to AdoptOpenJDK (https://adoptopenjdk.net/MigratingtoAdoptOpenJDKfromOracleJava.pdf) • AWT peer removals (http://mail.openjdk.java.net/pipermail/awt-dev/2015-February/008924.html) • Andy Guibert’s blog on OpenLiberty Java 11 support (https://openliberty.io/blog/2019/02/06/java-11.html)
24DEVNEXUS 2019 Questions? Email: dalia@us.ibm.com Twitter: @DaliaShea

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DevNexus 2019: Migrating to Java 11

  • 1.
    Migrating to Java11 1DEVNEXUS 2019 Dalia Abo Sheasha WebSphere Migration Tools Development Lead Email: dalia@us.ibm.com Twitter: @DaliaShea
  • 2.
    Agenda 2DEVNEXUS 2019 • Background •Java 9/10/11: New Features • Java 8 -> Java 11: Migration Concerns • Removed Packages/Classes/Methods • Migration Tools
  • 3.
    DEVNEXUS 2019 Java Timeline(Current) 2012 2014 2017 2018 2019 Sept2017 Java 9 March2018 Java 10 Java 12 March2019 July2011 Java 7 (LTS) March2014 Java 8 (LTS) Sept2018 Java 11 (LTS)
  • 4.
    DEVNEXUS 2019 Java Timeline(Future ) 2014 2017 2018 Sept2018 2019Sept2017 March2018 Java 11 Java 9 Java 10 Java 12 March2019 March2014 Java 8 2020 2021 2022 Java 13 Java 14 Java 15 Java 16 Java 17 (LTS) (LTS) (LTS)
  • 5.
    5DEVNEXUS 2019 Java 9/10/11:New Features Tons of Features! • ( JDK 9, JDK 10, JDK 11 ) • var for local variables (JEP 286) • Launch Single-File Source-Code Programs (JEP 330) • New methods in several classes (Optional, Collection, etc) • TLS 1.3 • …
  • 6.
    Java 9/10/11: Modularity 6DEVNEXUS2019 • Java Platform Module System (JPMS) • Breaks code into modules containing packages • Applications must declare dependency on modules for access • Very disruptive • “Kill switch” on by default (currently) • --illegal-access=permit
  • 7.
  • 8.
    Java 8 ->Java 11: Migration Concerns 8DEVNEXUS 2019 • Removals • Packages, classes and methods • Previously deprecated • General Migration Strategy: Replace • Not previously deprecated • General Migration Strategy: Depends… • Behavior changes • Information Source: Java 9/10/11 compatibility guides and release notes
  • 9.
    Java 8 ->Java 11: Removed Packages/Classes 9DEVNEXUS 2019 Removed Security classes: • com.sun.security.auth.PolicyFile • com.sun.security.auth.SolarisNumericGroupPrincipal • com.sun.security.auth.SolarisNumericUserPrincipal • com.sun.security.auth.SolarisPrincipal • com.sun.security.auth.X500Principal • com.sun.security.auth.callback.DialogCallbackHandler • com.sun.security.auth.module.SolarisLoginModule • com.sun.security.auth.module.SolarisSystem • javax.security.auth.Policy Java 8 Java 11
  • 10.
    Java 8 ->Java 11: Removed Packages/Classes 10DEVNEXUS 2019 Removed AWT APIs: • java.awt.peer.* • java.awt.dnd.peer.* • com.sun.awt.AWTUtilities Removed DOM APIs: • com.sun.java.browser.plugin2.DOM • sun.plugin.dom.DOMObject Removed Misc: • com.sun.image.codec.jpeg.* • com.sun.xml.internal.bind.*
  • 11.
    11DEVNEXUS 2019 Java 8-> Java 11: Removed Java EE Modules java.activation javax.activation java.corba javax.rmi javax.rmi.CORBA org.omg.CORBA org.omg.CORBA_2_3 org.omg.CORBA_2_3.portable org.omg.CORBA.* org.omg.CosNaming ... org.omg.PortableInterceptor org.omg.PortableInterceptor.* org.omg.PortableServer org.omg.PortableServer.* org.omg.SendingContext org.omg.stub.java.rmi java.transaction javax.transaction java.xml.bind javax.xml.bind javax.xml.bind.annotation javax.xml.bind.annotation.adapters javax.xml.bind.attachment javax.xml.bind.helpers javax.xml.bind.util java.xml.ws javax.jws javax.jws.soap javax.xml.soap javax.xml.ws javax.xml.ws.handler javax.xml.ws.handler.soap javax.xml.ws.http javax.xml.ws.soap javax.xml.ws.spi javax.xml.ws.spi.http javax.xml.ws.wsaddressing java.xml.ws.annotation javax.annotation Option 1: package your own dependencies Option 2: rely on the app server to provide them (OpenLiberty with Java 11)
  • 12.
    Java 8 ->Java 11: Removed Methods 12DEVNEXUS 2019 Removed java.lang.SecurityManager Methods: • java.lang.SecurityManager.checkAwtEventQueueAccess • java.lang.SecurityManager.checkSystemClipboardAccess • java.lang.SecurityManager.checkMemberAccess • java.lang.SecurityManager.checkTopLevelWindow • java.lang.SecurityManager.classDepth • java.lang.SecurityManager.classLoaderDepth • java.lang.SecurityManager.currentClassLoader • java.lang.SecurityManager.currentLoadedClass • java.lang.SecurityManager.getInCheck • java.lang.SecurityManager.inClass • java.lang.SecurityManager.inClassLoader Java 8 Java 11
  • 13.
    Java 8 ->Java 11: Removed Methods 13DEVNEXUS 2019 Removed java.lang.Thread Methods: • java.lang.Thread.destroy() • java.lang.Thread.stop(java.lang.Throwable) Removed java.lang.Runtime Methods: • java.lang.Runtime.getLocalizedInputStream • java.lang.Runtime.getLocalizedOutputStream • java.lang.Runtime.runFinalizersOnExit Removed java.lang.System Method: • java.lang.System.runFinalizersOnExit
  • 14.
    Java 8 ->Java 11: Removed Methods 14DEVNEXUS 2019 Removed java.util.logging.LogManager Methods: • java.util.logging.LogManager.addPropertyChangeListener • java.util.logging.LogManager.removePropertyChangeListener Removed java.util.jar.Pack200.Packer/Unpacker Methods: • java.util.jar.Pack200.Packer.addPropertyChangeListener • java.util.jar.Pack200.Packer.removePropertyChangeListener • java.util.jar.Pack200.Unpacker.addPropertyChangeListener • java.util.jar.Pack200.Unpacker.removePropertyChangeListener
  • 15.
    Java 8 ->Java 11: Other Changes 15DEVNEXUS 2019 Technology Removal: • Java Web Start • JavaFX (separate product) Other Removals: • @jdk.Exported • netdoc protocol handler Behavior changes • java.lang.Class.getAnnotation() • java.nio.channels.DatagramChannel.send() And much more… • Oracle JDK 11 Migration Guide
  • 16.
    16DEVNEXUS 2019 Java 8-> Java 11 Where do I start?
  • 17.
    17DEVNEXUS 2019 Application BinaryScanner Tool • Download: https://developer.ibm.com/wasdev/downloads/#asset/tools- Migration_Toolkit_for_Application_Binaries • Command Line tool (Runs with Java 7 and later) • Scans application binaries • Accepts .ear/.war files (and .jar files with --analyze option) • No app server required • Flags potential migration issues for a variety of scenarios • Java SE versions • On-premise -> Cloud • Others…
  • 18.
  • 19.
    19DEVNEXUS 2019 Application SourceScanner Tool • Download: https://developer.ibm.com/wasdev/downloads/#asset/tools- WebSphere_Application_Server_Migration_Toolkit • Eclipse Plugin • Scans application source code • Flags potential migration issues for a variety of scenarios including Java SE versions • Click-and-go to affected code line • Documentation • See Chapter 3-4 for installation details
  • 20.
  • 21.
    21DEVNEXUS 2019 Java classdependency analyzer (Jdeps) • Command utility shipped with JDK • Multiple Options • Migration Relevant Option: -jdkinternals • Accepts jars, class files, directories • Binary scanner and source scanner will recommend if applicable • Limitations • Subset of removed APIs • No method removal flagging • Java version specific (i.e. running Jdeps shipped with Java 8 is different than Java 11) • Documentation
  • 22.
    22DEVNEXUS 2019 TL;DR 1. Downloadthe Binary scanner: https://developer.ibm.com/wasdev/downloads/#asset/tools- Migration_Toolkit_for_Application_Binaries 2. Follow the prompts to install the jar. 3. Run the binary scanner against your application binaries. Here is my command: java -jar binaryAppScanner.jar C:AppsMyApplication.war --sourceAppServer=liberty -- targetAppServer=liberty --sourceJava=ibm8 --targetJava=openjdk11 • Command help: • java -jar binaryAppScanner.jar --help • java -jar binaryAppScanner.jar --help --analyze 4. Review the report and read the help for each flagged issue to resolve them.
  • 23.
    References/Resources 23DEVNEXUS 2019 • MyBlog on adding the Java 11 feature to the migration tools (https://developer.ibm.com/tutorials/migration-to-java-11- made-easy/) • Binary Scanner – see the Additional information section (https://developer.ibm.com/wasdev/downloads/#asset/tools- Migration_Toolkit_for_Application_Binaries) • Source Scanner – see the Additional information section (https://developer.ibm.com/wasdev/downloads/#asset/tools- WebSphere_Application_Server_Migration_Toolkit) • Oracle Java SE Support Roadmap (https://www.oracle.com/technetwork/java/java-se-support-roadmap.html) • Oracle JDK Migration Guide (https://docs.oracle.com/en/java/javase/11/migrate/index.html) • AdoptOpenJDK (https://adoptopenjdk.net) • Migrating from Oracle Java to AdoptOpenJDK (https://adoptopenjdk.net/MigratingtoAdoptOpenJDKfromOracleJava.pdf) • AWT peer removals (http://mail.openjdk.java.net/pipermail/awt-dev/2015-February/008924.html) • Andy Guibert’s blog on OpenLiberty Java 11 support (https://openliberty.io/blog/2019/02/06/java-11.html)
  • 24.