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IBM Java 7 and WAS v8.5:Features and benefits
Michael TunnicliffeSoftware Engineer
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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 å &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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What I#! $in$ t tal% abut
A little bit abut !e
A little bit abut "u
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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What I#! $in$ t tal% abut
A little bit abut !e
A little bit abut "u
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$it#
&uestins
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Java 77.hat is it8
Ma'r (latfr! release) tuchin$ 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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Java 77 Small language enhancements F(ro"ect CoinG
@ 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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Java 77 Small language enhancements F(ro"ect CoinG
@ ,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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Java 77 Small language enhancements F(ro"ect CoinG
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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Java 77 Small language enhancements F(ro"ect CoinG
5utomatic resource management
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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Java 77 Small language enhancements F(ro"ect CoinG
5utomatic resource management
!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$et K file classes a&aila!le
A 2 approaches to completion notification
@ =a>a-4til-conc4rrent-Future
@ =a>a-nio-channels-CompletionHandler
A
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Java 77 More new I*+ 5(Is for the a&a platform FHI+#2G
@ Hew file sstem 5(I
A 5ddress longstanding usa!ilit issues and !oilerplate
@ Modeling of more file sstem concepts li$e smlin$s
@
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Java 77 More new I*+ 5(Is for the a&a platform FHI+#2G
E)ample7 irector &isit
5iles-7al?5ileree(my0ath, newSimple5ile@isitorisit5ile(0ath "ile,
Basic5ile8ttri&4tes attrs) { try{ // do some processing o" "ile } catch(12ception e) { // "ailed, do error handling } return5ile@isitAes4lt-933C1; }});
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Java 77 Concurrenc and collection updates
9al: (ro&ide a&a programmers with more powerful tools to
ta$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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Java 77Hew JC polic added7 balanced
@ Incrementall collect areas of the heap that meet our needsA (artial Jar!age Collect F(JCG
@ Deduced pause times@
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Java 77Hew JC polic added7 balanced
@ 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
A little bit abut !e
A little bit abut "u
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$it#
&uestins
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WAS 8.57 a&a 9 in .5S
@ 9als
A Ena!le de&elopers to use a&a 9 features immediatel without forcing
glo!al migrations
A ecouple a&a SE &ersion from .5S &ersion
@ (otentiall decrease ser&er migration costs
@ 5llow customer fle)i!ilit in technolog choices
@ 5c$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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WAS 8.57 a&a &ersion compati!ilit
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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WAS 8.57 a&a &ersion compati!ilit
@ .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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1("ri$hts and Trade!ar%s
IBM Corporation 2012# 5ll Dights Deser&ed
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trademar$s of International Business Machines Corp#
registered in man "urisdictions worldwide# +ther product andser&ice names might !e trademar$s of IBM or other companies#
5 current list of IBM trademar$s is a&aila!le on the .e! at
:Copright and trademar$ information; at
www#i!m#com*legal*coptrade#shtml