IBM Java 7 and WAS v8.5 - Features and Benefits3

8/12/2019 IBM Java 7 and WAS v8.5 - Features and Benefits3

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IBM Java 7 and WAS v8.5:Features and benefits

Michael TunnicliffeSoftware Engineer


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2013 International Business Machines Corporation 2

Please nte

IBM's statements regarding its plans directions and intent are su!"ect to change orwithdrawal at IBM's sole discretion#

Information regarding potential future products is intended to outline our general product

direction and it should not !e relied on in ma$ing a purchasing decision#

%he information mentioned regarding potential future products is not a commitmentpromise or legal o!ligation to deli&er an material code or functionalit# Information a!out

potential future products ma not !e incorporated into an contract# %he de&elopment

release and timing of an future features or

functionalit descri!ed for our products remains at our sole discretion#

(erformance is !ased on measurements and pro"ections using standard IBM !enchmar$sin a controlled en&ironment# %he actual throughput or performance that an user will

e)perience will &ar depending upon man factors including considerations such as the

amount of multiprogramming in the user's "o! stream the I*+ configuration the storage

configuration and the wor$load processed# %herefore no assurance can !e gi&en that an

indi&idual user will achie&e results similar to those stated here#


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A little bit abut !e

Michael Tunnicliffe is a Software Engineer with IBM at the,ursle -a!s near .inchester /#

,e currentl wor$s in the a&a Support %eam and has o&er 10

ears e)perience in roles related to de&elopment and support ofthe IBM #

,e is responsi!le for supporting IBM a&a #04 dealing !oth with

difficult to diagnose pro!lems and issues in the use of the !

IBM products 3rd parties and applications#

%his has led to significant e)posure to &aring &ersions of

.e!Sphere 5pplication Ser&er in the conte)t of sol&ing client

pro!lems#


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A little bit abut "u


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2013 International Business Machines Corporation

What I#! $in$ t tal% abut




Java 77 .hat is it8 .hat's new8 Base features# IBM features#

WAS 8.57 a&a 9 in .5S# :a&a &ersion switch; feature# Migration tool$it#

&uestins


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2013 International Business Machines Corporation >







&uestins


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Java 77.hat is it8

Ma'r (latfr! release) tuchin$ n all as(ects f the lan$ua$eand J*M. Incorporating the following themes7

@ Compati!ilitA :5n program running on a pre&ious release of the platform must also run

unchanged on an implementation of a&a SE 9;

@ (roducti&itA :###promote !est coding practices and reduce !oilerplate### minimal learning cur&e###;

@ (erformanceA :###new concurrenc 5(Is### ena!le I*+intensi&e applications ! introducing a true

asnchronous I*+ 5(I##;

@ /ni&ersalitA :###accelerate the performance of dnamic languages on the a&a irtual Machine#;

@ IntegrationA :a&a SE 9 will include a new fle)i!le filesstem 5(I as part of SD 203###;


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Java 77.hat's new8

Base featuresS!e lar$er features

@ SD 336 A Small language enhancements F(ro"ect CoinG

@ SD 203 A More new I*+ 5(Is for the a&a platform FHI+#2G

@ SD 22 A Hew in&o$ednamic !tecode

@ SD 1>> A Concurrenc and collections updates

Plus s!e s!aller features +T,S -.) /0I1234 .6


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Java 77 Small language enhancements F(ro"ect CoinG

9al7 Impro&e programmer (rductivit"with small enhancements

to the a&a language and class li!raries

@ Strings in switchstatements

switch(myString) {caseone: /* do something */break;casered: /* do something else */break;default: /* do something generic*/;

}

@ Impro&ed tpe inference for generic instance creation FdiamondG

Map


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@ Better support for literals

A binar" literalsfor integral tpes Fbyte short intand longG7

%&'%%''%'%A underscresin nu!eric literals to help &isual !loc$ing 7

%+% -'%%." Fonl !etween digits thoughG

@ Simplified varar$smethod in&ocation

A Mo&es warnings to method declaration rather than on each use#

Deduces una&oida!le warnings#


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@ ,andle multiple e)ception tpes in a single catch

try{

} catch(0arse12ception a) {handle(a);

} catch(34m&er5ormat12ception &) {handle(&);

}

!ecomes7

try{

} catch(0arse12ception634m&er5ormat12ception a) {

handle(a);}

In this new constructa will act as if declared finalwith tpe hro7a&leHone of the e)ception classes used ma !e a su!class of an of the others


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5utomatic resource management

A ealing with all possi!le failures is hard

A Closing resources is hard

Idea7 Jet the compiler to help

A efine an interface on resources that $nows how to tid up automaticall

@ %he new interface is called 84to9losea&le@ Dele&ant a&a SE classes ha&e !een retrofitted with this interface

A 5dd new snta) to ma$e using this interface con&enient

@ %he new snta) is referred to as tr";ithresurces


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meaning this7

public voidprocess5iles() throws12ception { np4tStream in # n4ll; 4tp4tStream o4t # n4ll;

try{ in # new5ilenp4tStream(a5ilename); o4t # new5ile4tp4tStream(&5ilename);

} finally{ if(in # n4ll) { try{ in-close(); } catch(12ception e) { } }

if(o4t # n4ll) { try{ o4t-close(); } catch(12ception e) { } } }}


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!ecomes7

public voidprocess5iles()throws12ception { try(np4tStream in # new5ilenp4tStream(a5ilename); 4tp4tStream o4t # new5ile4tp4tStream(&5ilename)) {

}}


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Java 77 More new I*+ 5(Is for the a&a platform FHI+#2G

9al: Ena!le a&a programmers to unloc$ the more powerful

I*+ a!stractions

@ 5snchronous I*+

A Ena!le significant control o&er how I*+ operations are handled ena!ling

!etter scaling

A Soc$et K file classes a&aila!le

A 2 approaches to completion notification

@ =a>a-4til-conc4rrent-Future

@ =a>a-nio-channels-CompletionHandler

A


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2013 International Business Machines Corporation 1>


@ Hew file sstem 5(I

A 5ddress longstanding usa!ilit issues and !oilerplate

@ Modeling of more file sstem concepts li$e smlin$s

@


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E)ample7 irector &isit

5iles-7al?5ileree(my0ath, newSimple5ile@isitorisit5ile(0ath "ile,

Basic5ile8ttri&4tes attrs) { try{ // do some processing o" "ile } catch(12ception e) { // "ailed, do error handling } return5ile@isitAes4lt-933C1; }});


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Java 77 Concurrenc and collection updates

9al: (ro&ide a&a programmers with more powerful tools to

ta$e ad&antage of the pre&alence of multicore

@ Ma"or new a!straction7


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Java 77 Hew in&o$ednamic !tecode

9al: Ena!le dnamic languages to run more efficientl on the M

%he M is now home to man languages !ut it lac$s some fundamentals that

help ma$e those languages go fast#

@ ecouple method loo$up from method dispatchA Jet awa from !eing purel a&a language centric

@ 5pproach

A 5dd a new !tecode to directl e)ecute a method

A 5llow this to !e updated at run time7

@ Change which method is e)ecuted@ (ro&ide a framewor$ for mutators Fadd*remo&e parameters etcG

A Ensure the I%compiler can continue to generate efficient compiled code


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Java 77 Smaller features

@ Class-oader changesA Ena!led parallel classloading capa!ilit &ia new :safe; 5(I

A /D-Class-oader gains a close#$method

@ I1HA /nicode >#0 -ocale enhancement Separate user locale and userinterface locale

@ %-S 1#2 A Securit updates

@ BC 6#1 A 5DM awareness

@ Client F/IG updates

A Create new platform 5(Is for >u10 graphics features

A Him!us loo$andfeel for Swing

A Swing laer component

A ODender support

@ /pdate the OM- stac$


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Java 77.hat's new8

IBM features

@ (erformance K platform e)ploitation A N1> (+.ED 9 L

@ Jar!age Collector updatesA Jeneral impro&ements

A Hew !alanced JC polic

@ %echnolog e&aluation of .e!Sphere Deal %ime

@ Ser&icea!ilit and consuma!ilit impro&ements


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Java 77(erformance K platform e)ploitation

@ :6 out of pu!lishers prefer ;A http7**www#spec#org*"!!200*results*res20106

A P S(EC"!!200 pu!lishes in 2010 with @ 6 with with ,otSpot with roc$it

@ (+.ED9 e)ploitationA Hew prefetching capa!ilitiesA E)tended di&ide instructions

A Con&ersion !etween integer and float

A Bit permutation and popcount instructions

A BC assist e)ploited through a&a Bigecimal

@ Sstem NEnterprise 1> e)ploitationA 904 new instructions

@ ,ighword facilit@ Interloc$update facilit@ Hondestructi&e operands@ Conditional load*store

A a$$re$ate i!(rve!ent

@ Some from &2> M ma"orit from hardware

P7 -.? faster than 0ehale! 4?

+8 sc%ets

==-8

5-656-

6-666666666666=666666@6666665666666666666

0ehale! 4? P2W4A7

BC2S 1P/ Intensive Java

Wr%lad

0

30

100

130

N10 > SD

N1> > SD

B-


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Java 77 Jeneral JC impro&ements

@ efault JC polic changed to $encn

A Jenerational and concurrent collection algorithm pro&ides !est out of the

!o) performance for most applications

@+!"ect header siNe reductionA +!"ect headers are 61> !tes depending on o!"ect tpe and reference siNe

A Deduces JC freuenc and pro&ides !etter o!"ect localit

@ Scala!ilit impro&ements across all policiesA JC pauses reduced on large nwa machines FQC(/ R >6G

A ,ighl parallel applications !enefit from impro&ed allocation scala!ilit

@ 5s a result sub(lJC polic now an alias for (tthru(ut

@ Hew format &er!ose7gc logsA E&ent!ased instead of summar!ased

A (ro&ides more detailed information for deeper analsis


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Java 77Hew JC polic added7 balanced

Address neDt $eneratin hard;are challen$es

@ Meet need for scaling to large heapsA E)isting policies e)hi!it

@ a mi)ture of freuent short pauses and long pauses

@ pause times that increase with heap siNe

@ (ro&ide strong adapti&e performance without e)pert ad&iceA


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@ Incrementall collect areas of the heap that meet our needsA (artial Jar!age Collect F(JCG

@ Deduced pause times@


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@ Suggested deploment scenariosA -arge heaps FR6JB in siNeG

A


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Java 77 %echnolog e&aluation of .e!Sphere Deal %ime

@ .e!Sphere Deal %ime is a a&a Duntime !uilt with

technolog that pro&ides consistent performanceA Incremental JC means consistentl short F3msG JC pause times

A I% compilations cannot !loc$ application threads

A 5lso a ,ard Deal %ime fla&or that runs on Deal%ime -inu) Fe#g# D,E-

MDJ Ho&ell S-ED%G

@ IBM a&a 9 includes an e&aluation &ersion of .D%3A Hew pause time target option lets ou configure JC pause times

A %hroughput performance impro&ements

A 32 and >6!it -inu) on )> 32 and >6!it 5IO on (+.ED

@ ust add ?$c(lic":!etrn!e to our a&a 9 command

line to tr it out=


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Java 77 %echnolog e&aluation of .e!Sphere Deal %ime

Tms Tms

10ms A 16 ms

90ms

Jencon pause times

2#ms 3#2ms

Metronome (ause %imes F%argetU3msG

Metronome (ause %imes F%argetU>msG

Metronome (ause %imes F%argetU10msG

#ms >#2ms

#ms 10#2ms

Most JC policies ha&e pause times

ranging upwards of 10 A 100 ms Metronome controls pause times to

as short as 3ms

%hroughput impact &aries !

application

91 (auses: $encn and !etrn!e


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Java 77 Ser&icea!ilit and consuma!ilit impro&ements

@ ump agents FOdumpGA Hati&e stac$ traces in "a&acore

A En&ironment &aria!les and /-IMI%s in "a&acore

A Hati&e memor usage counters in "a&acore and from core dumps &ia %6 !it sstems

@ %race engine FOtraceGA %racepoints can include a&a stac$s F"stac$traceG

@ Message logging FOlogGA Messages go to the E&ent log on .indows sslog on -inu) errlog or

sslog on 5IO MS console on N*+S


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Java 77 Ser&icea!ilit and consuma!ilit impro&ements

0ative !e!r" usa$e cunters

NATIVEMEMINFO subcomponent dump routine=======================================

JRE: 555,69,!6" b#tes $ %!& '((oc'tions)*++VM: 55!,9,66" b#tes $ 56 '((oc'tions) )) *++-('sses: %,9"9,66" b#tes $ 9! '((oc'tions

) )) *++Memor# M'n'.er /0-1: 5",&5," b#tes $ %"6 '((oc'tions) ) )) ) *++J'2' 3e'p: 546,5,&& b#tes $ % '((oc'tion) ) )) ) *++Oter: %&,4&,"& b#tes $ %"5 '((oc'tions) )) *++Tre'ds: !,66&,&" b#tes $ %&" '((oc'tions) ) )

) ) *++J'2' t'c7: 6",9"" b#tes $ 9 '((oc'tions) ) )) ) *++N'ti2e t'c7: !,5!4,%46 b#tes $ %% '((oc'tions) ) )) ) *++Oter: !,!" b#tes $ " '((oc'tions) )) *++Tr'ce: 9!,"6" b#tes $ !& '((oc'tions) )


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Wait) ;here did ;e $et tE






&uestins


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WAS 8.57 a&a 9 in .5S

@ 9als

A Ena!le de&elopers to use a&a 9 features immediatel without forcing

glo!al migrations

A ecouple a&a SE &ersion from .5S &ersion

@ (otentiall decrease ser&er migration costs

@ 5llow customer fle)i!ilit in technolog choices

@ 5c$nowledge future a&a &ersions might !e added to e)isting product

&ersions

A StandardiNe a&a SE &ersion switching across platforms

@ .5S for N*+S and i+S alread supported some mi)ing

@


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WAS 8.57 a&a 9 in .5S

@ 1aveat7 does ntsupport :!ring our own; a&a SE

implementation

@ Suggested implementation pattern7

1# Install .5S

2# Install a&a 9 optional pac$age3# /se 'managesd$' to set all defaults to a&a 9

6# Create a profile

@ 5lternati&e pattern options

A 5dd a single a&a 9 node

A 5dd a&a 9 to specific ser&ers in a node migrate onl some apps

A Mo&e profile ! profile


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WAS 8.57 :a&a &ersion switch; feature

@ Ena!ling the a&a 9 S

A Set new profile default

--D8ppSer>erD&in! managesdk %setnewprofiledefault %sdkname '(,*)+9ESFG'%..: 3e7 pro"ile creation 7ill no7 4se SFG name '-J-9ESFG'%%': S4ccess"4lly per"ormed the reI4ested managesd? tas?-

A Ena!le sd$ in all profiles

D8ppSer>erD&in! managesdk %enableprofileall %sdkname '(,*)+9ESFG'%%': S4ccess"4lly per"ormed the reI4ested managesd? tas?-

@ (otential pro!lems

A Between Ms ensure the consistenc of7

@ Command line options@ (roperties files

@ /seradded e)tension and endorsed "ars

@ HI --s

@ Monitoring Feg7 I%C5MG


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WAS 8.57 a&a &ersion compati!ilit

Write 2nce) un An";hereG what does this mean8

@ a&a commits to binar"compati!ilit not surcecompati!ilitA E)isting !inaries Fie7 class filesG continue to wor$ on newer a&a &ersions

A But7 e)isting a&a source ma not compile

@ Bac$wards compati!le !ut not forward compati!leA Build #"a&a on old run on new UR wor$s

A Build #"a&a on new run on old UR fails


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4Da!(le surce c!(atibilit" (rble!

public class5 { public static int en4m # H;}

! =a>ac Kso4rce '- Ktarget '- 5-=a>a5-=a>a:.: 7arning: as o" release H, Len4mL is a ?ey7ord, andmay not &e 4sed as an identi"ier' warning

! =a>ac Kso4rce '-H Ktarget '-H 5-=a>a

5-=a>a:.: as o" release H, Len4mL is a ?ey7ord, and may not&e 4sed as an identi"ier(4se Kso4rce '- or lo7er to 4se Len4mL as an identi"ier)' error


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@ .hat $inds of change should we watch for8

A -anguage snta)

A 5(I enhancements

A /nspecified !eha&iour changes

A /nspecified class changes

A Bugs Ffi)ed and introducedG

@ Ensure 3rdpart li!raries wor$ on a&a 9A 5lmost all will due to !ac$wards compati!ilit !ut a small minorit ma ha&e some

ha&e &er specific issues# Fe#g#7 &ersion chec$ingG

A Most !tecode instrumentation li!raries need new &ersions

@ 5SM R &ersion 6#0

@ BCE- R %B A under de&elopment


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WAS 8.57 Ca&eats %ric$s and %ips

@ %o use a a&a 9 runtime ou do H+% need to re!uild our code#

@ ,ow to remain a&a > compati!le8

A .arning7 :Kso4rce '-J target '-; does H+% wor$#A Can use :Kso4rce '- target '-; !ut !eware use of new classes * methods#

A +ptional practice7 compile against !oth > K 9 to !e sure#

@ +ld tric$ of :!uild at new le&el target old; does H+% wor$# 5DM in particular

reuires significant M plum!ing to support#


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WAS 8.57 Migration tool$it

@ Migrate .e!Sphere applications from older releases to .e!Sphere

5pplication Ser&er &9#0 or

A Migrate applications from &>#0 &>#1 &9#0 and

@ Migrate


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Su!!ar"

@ a&a 9 !ase features

A Base features

@ SD 336 A Small language enhancements F(ro"ect CoinG

@ SD 203 A More new I*+ 5(Is for the a&a platform FHI+#2G

@ SD 22 A Hew in&o$ednamic !tecode

@ SD 1>> A Concurrenc and collections updates

@Some smaller features F%-S 1#2 /HIC+E >#0LG

A IBM features

@ (erformance K platform e)ploitation A N1> (+.ED 9 L

@ Jar!age Collector updates

@ %echnolog e&aluation of .e!Sphere Deal %ime

@ Ser&icea!ilit and consuma!ilit impro&ements

@ .5S #A a&a 9 in .5S

A :a&a &ersion switch; feature

A a&a &ersion compati!ilit

A Ca&eats tips and tric$s

A Migration tool$it


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&uestinsE


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eferences

@ a&a 9A (ro"ect Coin

@ https7**www#i!m#com*de&eloperwor$s*mde&eloperwor$s*!logs*"a&aee*entr*VminuteVgui

deVtoVpro"ectVcoin8langUenA HI+#2

@ http7**www#i!m#com*de&eloperwor$s*"a&a*li!rar*"nio21*inde)#html

A


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Documents

IBM Java 7 and WAS v8.5 - Features and Benefits3