JavaSE$Plaorm$Update CREATE THE MarkReinhold% …€¦ · naming.rmi base java.se compact3 compact2...

JCP EC Mee(ng2015/01/14

Mark Reinhold (@mreinhold)Chief Architect, Java Pla1orm GroupOracle

Java SE Pla5orm Update

CREATETHEFUTURE

Java SE 8 (JSR 337): Key Features

• Annota(ons on Java Types (JSR 308)• Date & Time API (JSR 310)

• Lambda Expressions & Streams (JSR 335)

• Compact Profiles

Java SE 8: Addi(onal Features

• Language– Access to Parameter Names at Run(me (JSR 269 MR, 337)– Add Javadoc to javax.tools (JSR 199 MR)– Annota(ons on Java Types (JSR 308)

– Generalized Target-‐Type Inference (JSR 335)– Lambda Expressions & Virtual Extension Methods (JSR 269

MR, 335)

– Repea(ng Annota(ons (JSR 269 MR, 337)

• Core Libraries– Base64 Encoding & Decoding– Bulk Data Opera(ons for Collec(ons (JSR 335)– Concurrency Updates

– Date & Time API (JSR 310)– Enhance Core Libraries with Lambda (JSR 335)

– JDBC 4.2 (JSR 114 MR, 221 MR)– Parallel Array Sor(ng– Sta(cally-‐Linked JNI Libraries

• I18n– BCP 47 Locale Matching– Unicode 6.2

• Networking– HTTP URL Permissions

• Security– Configurable Secure Random-‐Number Genera(on– Enhance the Cer(ficate Revoca(on-‐Checking API

– Limited doPrivileged– NSA Suite B Cryptographic Algorithms

– TLS Server Name Indica(on (SNI) Extension

• XML– Restrict Fetching of External XML Resources (JSR 206 MR)

• Pla5orm– Compact Profiles (JSR 3 MR, 160 MR, 337)– Prepare for Modulariza(on (JSR 173 MR, 206 MR, 337)

Java SE 8: Recep(on

Java SE 8: Adop(on

• GitHub project builds on Java SE 8 (Travis CI)– August 2014: 2,380– January 2015: 4,982

• Many prominent projects will require SE 8 in near-‐future releases– Scala 2.12, Lucene 5.0, Hippo CMS 7.10, OpenNMS 1.14, Weld 3.0, …

• Typesafe survey (September 2014): Adop(on faster than expected– A fikh of SE 8 adopters are already running it in produc(on– A third are planning to deploy it shortly

Java SE 8: Maintenance Review (closes 2015/02/09) (details)

• Language & VM specifica(on correc(ons– Update the class and interface ini(aliza(on algorithm– Clarify overload resolu(on with respect to lambda expressions

• Debugging: Support sta(c and default methods in JDI, JDWP, and JDB– Not finished in (me for SE 8 Final Release

• Depreca(on, in prepara(on for modulariza(on– Extension Mechanism– Endorsed-‐Standards Override Mechanism

Java SE 9 (JSR TBD)

• Key features– Java Pla5orm Module System (JSR 376)– Java SE Pla5orm Modulariza(on (JEPs 200, 220)

• Addi(onal poten(al features (so far)– Small language cleanups (JEPs 211, 213)– Enhanced vola(les (JEP 193)– Java Read-‐Eval-‐Print Loop (REPL) (JEP 222)– Datagram Transport Layer Security (JEP 219)– HTTP 2 Client API (JEP 110)

Java Pla5orm Module System (JSR 376)

• Key features:– Reliable configura(on– Secure encapsula(on

• … which enable:– Escape from “JAR hell”– A modular, scalable pla5orm• Both Java SE and, eventually, Java EE

– Improved pla5orm security and integrity– Improved performance

“Approachable, yet scalable”

Java Pla5orm Module System: Technology Overview• Module = A named, self-‐describing collec(on of code and data– Declares which modules are required in order to compile and run it– Declares which of its API packages are exported for use by other modules,and which are not

– Declares which service interfaces it uses, and which services it provides

• Run-‐(me system responsibili(es– Locate all required modules, given an ini(al module (resolu0on)

– Ensure that modules do not interfere with each other• E.g., in case two modules contain packages of the same name

– Load code on behalf of the compiler and VM– Provide a means for other module systems (e.g., OSGi) to locate and resolve modules

• Language/VM responsibili(es– Prevent code from accessing types in non-‐exported packages

Java SE Pla5orm Modulariza(on (JEPs 200, 220)

• Goals– Divide the Java SE Pla2orm into a set of medium-‐grained modules• More flexible than current Compact Profiles

• Not so fine-‐grained as to be difficult to use or costly to implement

– Clearly disEnguish between standard SE vs. implementaEon-‐specific modules

• Constraints– CompaEbility• An SE 8 applicaEon that uses only standard, non-‐deprecated SE 8 APIsmust conEnue to work, unchanged, on SE 9

– Performance• StaEc footprint, startup Eme, memory footprint, and run-‐Eme performanceof typical implementaEons must not degrade– Except that footprint may increase to accommodate new features

naming.rmi

java.se

compact3

compact2

compact1

logging scrip(ng

security.acl

security.sasl

sqlrmi

xmlxml.crypto

prefsdesktop

ac(va(on

compiler management

sql.rowset

security.jgss

instrument

naming

xml.ws

xml.soap

xml.bind

annota(ons.common

hopserver

javadoc

xml.ws

xml.bind

compiler

security.auth

scrip(ng.nashorn

hotspot.agent

jconsole jcmd jdi

jvmstat

naming.dns

charsets

smartcardio

crypto.ec

crypto.pkcs11

hprof.agent

jdwp.agent

localedata

sun.invoke

java.base

sun.reflect

sun.invoke

java.lang

java.base

sun.reflect

java.sql

sun.invoke

java.lang

java.base

sun.reflect

java.sql

javax.sql

java.sql

sun.invoke

java.lang

java.base

sun.reflect

java.sql

javax.sql

package java.sql;

public interface Connection {

PreparedStatement prepareStatement(String sql) throws SQLException { ...

java.sql

sun.invoke

java.lang

java.base

sun.reflect

java.sql

javax.sql

package java.sql;

java.sql

sun.invoke

java.lang

java.base

sun.reflect

java.sql

javax.sql

✘ java.lang not exported by java.base

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java.sql

sun.invoke

java.lang

java.base

sun.reflect

java.sql

*javax.sql

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java.sql

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

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package java.sql;

java.sql

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

javax.sql

java.sql

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

javax.sql

java.sql

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

*javax.sql

java.sql *

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

javax.sql *

package java.sql;

import sun.reflect.CallerSensitive;import sun.reflect.Reflection;

public class DriverManager {

...java.sql

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

javax.sql *

package java.sql;

...java.sql

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

javax.sql *

✘ sun.reflect not exported by java.base

package java.sql;

...java.sql

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

javax.sql *

package java.sql;

...java.sql

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

javax.sql *

package java.sql;

...java.sql

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

javax.sql *

java.sql *

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

javax.sql *

java.sql *

sun.invoke

java.lang *

java.base

sun.reflect

java.sql

javax.sql *

package java.sql;

import java.util.logging.Logger;

public class Driver {

public Logger getParentLogger() throws SQLFeatureNotSupportedException;

java.sql *

sun.invoke

java.lang *

java.base

sun.reflect

java.util.logging*

java.loggingjava.sql

java.sql

javax.sql *

java.sql *

sun.invoke

java.lang *

java.base

sun.reflect

java.util.logging*

java.sql

javax.sql *

java.sql *

sun.invoke

java.lang *

java.base

sun.reflect

java.util.logging*

java.sql

java.logging

javax.sql *

java.sql *

sun.invoke

java.lang *

java.base

sun.reflect

java.util.logging*

java.sql

java.logging

javax.sql *

com.foo.app

java.sql *

sun.invoke

java.lang *

java.base

sun.reflect

java.util.logging*

java.sql

java.logging

javax.sql *

com.foo.app

java.sql *

sun.invoke

java.lang *

java.base

sun.reflect

java.util.logging*

java.sql

java.logging

javax.sql *

com.foo.app

java.sql *

sun.invoke

java.lang *

java.base

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java.util.logging*

java.sql

java.logging

javax.sql *

com.foo.app

package com.foo.app;

import java.sql.*;

Driver d = DriverManager.getDriver(uri); Connection c = d.connect(uri, props); d.getParentLogger().info("Connection acquired");

java.sql *

sun.invoke

java.lang *

java.base

sun.reflect

java.util.logging*

java.sql

java.logging

javax.sql *

com.foo.app

import java.sql.*;

java.sql *

sun.invoke

java.lang *

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java.util.logging*

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javax.sql *

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import java.sql.*;

java.sql *

sun.invoke

java.lang *

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java.util.logging*

java.sql

java.logging

javax.sql *

com.foo.app

java.sql *

sun.invoke

java.lang *

java.base

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java.util.logging*

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java.logging

javax.sql *

com.foo.app

*.jmod

$JRE/bin/java /lib/...

*.class

JVM image

The preceding is intended to outline our general product direc(on. It is intended for informa(on purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or func(onality, and should not be relied upon in making purchasing decisions. The development, release, and (ming of any features or func(onality described for Oracle’s products remains at the sole discre(on of Oracle.

JCP EC Mee(ng2015/01/14

Mark Reinhold (@mreinhold)Chief Architect, Java Pla1orm GroupOracle

Java SE Pla5orm Update

CREATETHEFUTURE

JavaSE$Plaorm$Update CREATE THE MarkReinhold% …€¦ · naming.rmi base java.se compact3 compact2...

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