cop4 - cop - corba

8/7/2019 COP4 - COP - Corba

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PHT TRIN PHN MM HNG CU PH(Component Oriented Programming)

KHOA CNG NGH THNG TINB MN CNG NGH PHN MM


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Chng 4: COP & CorbaChng 4: COP & Corba

Gii thiu CORBAKin trc CORBA

Cc thnh phn CORBABt u COP vi HelloCORBACc dch v CORBA

Cc cng c h tr CORBA


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t vn t vn

M hnh web hin nay cho thy th mnh ca mhnh Client Server Xu hng tp trung gii quyt vn m ngun ll Server

Cc phn mm vit trn cc ngn ng khc nhauC cch no c th kt ni Client Server trongkhi mi my trin khai trn mt nn tng ngn ngkhc nhau?


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t vn t vn

C++ Bus Object Delphi Moto Object

Java Passenger Object

? ?

?CORBA

CORBACORBA


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Common Object Request Broker Architecturec to ra bi cng tyc to ra bi cng ty Object Management Group(OMG), c lin quan ti khong trn 800 cng tykhc nhau.

Corba tr gip qu trnh c t cc thnh phn.Corba tr gip qu trnh c t cc thnh phn.Corba h tr tt cho cc ng dng chy trn mCorba h tr tt cho cc ng dng chy trn mhnh Client Server.hnh Client Server.

Vi c t Corba, cc phn mm chy trn server v Client c th trin khai vi nn tng ngn nglp trnh khc nhau: Java, C++, Delphi

Gii thiu CORBAGii thiu CORBA


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Ra i nm 1991. p ng nhu cu xy dng ccm hnh i tng phn tn.Bao gm 2 thnh phn c bn: IDL + APIIDL = Interface Definition LanguageAPI tr gip vic gi hm t xa trong m hnh phntn.H tr BOA (Basic Object Adapter)

CORBA 1.0CORBA 1.0


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Ra i nm 1996.Thay th BOA bng POA (Portable Object Adapter B iu khin i tng di ng)H tr giao thc Internet Inter-ORB Protocol (IIOP)Cho chp nh x t IDL sang C, Java, DelphiCc cng ty phn mm ln ch v h tr k thut:

+ SUN h tr cng c: IDLJ IDLtoJava+ Microsoft h tr cng c DCOM Sau ny c

thay th bi Dotnet Framework.

CORBA 2.0CORBA 2.0


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L phin bn cui cng ca CORBAChnh thc h tr kin trc hng thnh phnTch hp CCM (CORBA Component Model)

OpenCCM, MicoCCM, and EJB 3.0 l nhng cngc gip trin khai cc thnh phn vi CORBA.OpenCCM s c gii thiu trong phn sau.

CORBA 3.0CORBA 3.0


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Kin trc c bn CORBAKin trc c bn CORBA


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Kin trc c bn CORBAKin trc c bn CORBAObject Request Braher (ORB)Object Adapter (OA)Stub and Skeleton

Interface Repository (IR) and ImplementationRepository IRObject References (OR)Interface Definition Language (IDL) and LanguageMapping


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Object Request Broker/Braher (ORB)i tng trung gian x l yu cu.Cha cc th vin v cc x l nh v v kch hotcc i tng t xa.

L tng thp nht gn kt my ch v my trm.nh v i tng, gi cc phng thc c nhngha thng qua giao din.Nhn kt qu tr v t my ch.

ORB c c trn my ch v my trm.


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M hnh ORB

ORB

ORB

ORB

Network

C++CorbaObject

DelphiCorbaObject

JavaCorbaObject


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Kin trc kiu ORB

ORB ORB

Intermidiate class

_Stub

Intermidiate class

_Skel

C++Client

JavaCorbaObject

IIOP

Client Server


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Object Adapter (OA)B iu khin cc i tng.Chu trch nhim np cc thnh phn cho my ch.OA gi cc hm, to lp kch hot i tng thcthi v hy b chng.OA c 2 dng l BOA v POABOA c phin bn 1, c thay th POA phinbn 2.


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Stub and Skeletonc hiu nh l ph t ca my ch v my trm.Stub v Skeleton s c nhim v trao i d liucho nhau.Khi my trm c yu cu, Stub c nhim v sp tmi tham s (l object) v truyn ln my ch.Skeleton trn my ch s gii m i tng ny vx l.

Mt qu trnh ngc li vi qu trnh trn, d liuc tr v cho my trm.Kin trc hin nay ch cn li Stub

I f R i (IR) &


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Interface Repository (IR) &Implementation Repository IR

c hiu l kho d liu giao din v kho trin khaIR bao gm: Thng tin kiu d liu, phng thc vcc tham s c nh ngha thng qua ngn ngIDL.

Implementation Repository ch ra cch thc kchhot cc thnh phn my ch.Implementation Repository ch y cc thng tinv cc thnh phn, cc lp c trong cc thnh

phn v cc i tng.


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Object References (OR)i tng tham chiu.L mt i tng thnh phn ca CORBAOR cha v tr, ch s (id) ca nhng i tng yucu.

My trm cn phi ly c danh sch cc OR.Khi cn thc hin li gi hm, my trm s tm tiOR ca phng thc tng ng.


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Interface Definition Language (IDL)Ngn ng nh ngha giao dinCho php nh ngha giao din thng qua cc tkha.Giao din c ghi di dng file .idl

Cc file idl s c dch (mapping) sang cc ngnng tng ng nh: C++, Java, DelphiJava s dng IDLJ thc thi bin dch IDL sangm Java.IDL s c gii thiu phn sau.


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Bt u CORBA vi HelloCORBABt u CORBA vi HelloCORBACc bc tin hnh:

1. To file hello.idl, nh ngha giao din chung.2. Bin dch IDL thnh file Java, C++3.

Vit li cc thnh phn Server v Client ktha cc Interface4. Bin dch file Java, C++ thnh cc chng

trnh chy trn Server v Client5. Chy dch v trn Server 6. Chy ng dng trn Client


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Mc tiu cn t cMc tiu cn t cTo ra mt ng dng Client Server Cc phng thc xy dng trn Server

+ sayHello: In ra 1 dng Hello+ shutdown: hy b i tng remote

Client gi mt yu cu gi mt hm trn Server Kt qu li gi hm hin th trn Client


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1. To file hello.idl1. To file hello.idlC th son tho file IDL bng cng c son thobt k: notepad, wordpad..Vi NetBean:

+ Download: jbi4corba-0.7.1-netbeans-plugin

+ Menu Tools Plugin Addnew+ Chn cc file c gii nn t file download+ T ca s Project, chn mt project bm chut phi

v chn new IDL File.


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1. To file hello.idl1. To file hello.idlCode: hello.idl

module HelloApp{

interface Hello

{string sayHello();oneway void shutdown();

};};


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2. Bin dch IDL sang Java2. Bin dch IDL sang JavaS dng cng c IDLJ c trong th mc BIN caJavaLnh:

Idlj [option] hello.idl

Option:-fall: Bin dch cho c Client v Server -fclient: Bin dch cho phn Client-fserver: Bin dch cho phn Server


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2. Bin dch IDL sang Java2. Bin dch IDL sang JavaSau khi bin dch, ta c m java:

package HelloApp;public interface Hello{

String sayHello ();void shutdown ();

}

Tuy nhin y ch l kt qu ta mong i


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2. Bin dch IDL sang Java2. Bin dch IDL sang JavaThc t khi bin dch, trnh bin dch IDLC khngch to ra mt file .java.Kt qu to ra khc nhau khi ta a cc Optionkhc nhau.

-fall: _HelloStub, Hello, HelloHelper, HelloHolder,HelloOperations, HelloPOA-fserver: Hello, HelloOperations, HelloPOA-fclient: _HelloStub, Hello, HelloHelper, HelloHolder,

HelloOperations


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2. Bin dch IDL sang Java2. Bin dch IDL sang Java

Idlj fall hello.idl

Idlj fclient hello.idl

Idlj fserver hello.idl


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3. Component Client & Server 3. Component Client & Server Server:

1. Xy dng lp HelloServant Skeleton2. Xy dng lp HelloServer

Client:1. Xy dng lp HelloClient


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3. Component Client & Server 3. Component Client & Server HelloServant.java


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3. Component Client & Server 3. Component Client & Server HelloServer.java

l


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3. Component Client & Server 3. Component Client & Server HelloClient.java

4 Bi d h fil J4 Bi d h fil J


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4. Bin dch cc file Java4. Bin dch cc file JavaTh mc HelloApp c sinh ra thc thi IDLJ

Vi Option fall, HelloApp cha 6 file .javaCopy th mc HelloApp sang D:Copy 3 file: HelloServer.java, HelloClient.java,HelloServant.java sang D:Start Run: g cmd vo Commandt ng dn ti th mc BIN ca Java

path C:\ProgramFiles\Java\jdk1.6.0_17\bin

Thc hin lnh bin dch:javac d:\HelloApp\*.java d:\*.java

5 Ch d h S5 Ch d h S


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5. Chy dch v trn Server 5. Chy dch v trn Server Khi ng Server ORB:

start orbd -ORBInitialPort 1050Thc thi HelloServer vi cc tham s:

+ Port: 1050+ Server IP: Localhost

Lnh trong Commandjava HelloServer -ORBInitialPort 1050 -ORBInitialHost

localhost

5 Ch d h S5 Ch d h t S


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5. Chy dch v trn Server 5. Chy dch v trn Server

5 Ch d t Cli t5 Ch d t Cli t


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5. Chy ng dng trn Client5. Chy ng dng trn ClientThc hin lnh trong Command:

java HelloClient -ORBInitialPort 1050 -ORBInitialHostlocalhost

IDL Expamle

C d h CORBAC d h CORBA


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Cc dch v ca CORBACc dch v ca CORBA

Object Request Broker Object Request Broker

Objec t life

Objec t life

cycle

cycle

Nami ng

Naming

Event

Event

Conc urency

Concurenc y

C

ontr ol

C

ontr ol

Trader

Trade r

Trans actio n

Trans actio n

Query

Query

CORBA SERVICES

NamingNaming

NAMING SERVICENAMING SERVICE


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NAMING SERVICENAMING SERVICE

L dch v cho php truy xut n ccL dch v cho php truy xut n cci tng phn b thng qua tn.i tng phn b thng qua tn.

c nh ngha trong CosNaming.idlc nh ngha trong CosNaming.idl

COSNAMINGCOSNAMING


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COSNAMINGCOSNAMING

Gm c 2 interface ch yuGm c 2 interface ch yu+ NamingComponent+ NamingComponent+ NamingContext+ NamingContext

Lu tr i tng theo kin trc cyLu tr i tng theo kin trc cy

phn cp.phn cp.

NamingComponentNamingComponent


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NamingComponentNamingComponent

L thnh phn cha tn (tn nhn hocL thnh phn cha tn (tn nhn hoctn tp tin)tn tp tin)

C th rng buc tn vi mt i tngC th rng buc tn vi mt i tngcorba bt k.corba bt k.

NamingContextNamingContext


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NamingContextNamingContext

L i tng dng tham chiu nL i tng dng tham chiu nmt NamingComponent hay mtmt NamingComponent hay mtNamingContext khc.NamingContext khc.Ging nh th mc trong h thng file.Ging nh th mc trong h thng file.t tn da vo NamingComponent.t tn da vo NamingComponent.

M HNH LU TR I TNGM HNH LU TR I TNG


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M HNH LU TR I TNGM HNH LU TR I TNGMarketMarket

StockStock

ToysToys

FruitFruitShelf Shelf

BookBook

PanelPanel

ObjectObjectAA

ObjectObjectBB

ObjectObject

CC

i tngi tngNameContextNameContext

i tng

c rn g buc

i t ng

c rn g buc

i tngi tngNameComponentNameComponent

Tn rng buc ca i tngTn rng buc ca i tng

CC HM C BNCC HM C BN


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CC HM C BNCC HM C BNTo NamingContext:To NamingContext:new_context()new_context()

new_bind_context(NameComponent[] path)new_bind_context(NameComponent[] path)Hy NamingContext:Hy NamingContext:

destroy()destroy()Ly v i tng NamingContext:Ly v i tng NamingContext:

resolve_initial_references(ObjectId id)resolve_initial_references(ObjectId id)

resolve(NameComponent[] path)resolve(NameComponent[] path)

CC HM C BNCC HM C BN


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CC HM C BNCC HM C BNTo mt bindTo mt bind

Bind(NameComponent[] path, Object obj)Bind(NameComponent[] path, Object obj) Bind_context(NameComponent[] path,Bind_context(NameComponent[] path,

NameContext nc)NameContext nc)

Rebind(NameComponent[] path, Object obj)Rebind(NameComponent[] path, Object obj)Hy mt bind Hy mt bind

Unbind(NameComponent[] path)Unbind(NameComponent[] path)

Lit k cc binding trong mt contextLit k cc binding trong mt contextList(NameContext nc, BindingList bl,List(NameContext nc, BindingList bl,BindingIterator bt)BindingIterator bt)

Cc cng c h tr CORBACc cng c h tr CORBA


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Cc cng c h tr CORBACc cng c h tr CORBA

CCMCCM

OmniORBOmniORBVisiBroker

Tm tt kin thcTm tt kin thc


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Tm tt kin thcTm tt kin thcCORBA l mt cng ngh - khng nCORBA l mt cng ngh - khng nthun l mt ngn ngthun l mt ngn ngCORBA = IDL + API + ToolCORBA = IDL + API + Tool+ IDL l mt ngn ng trung gian inh ngha+ IDL l mt ngn ng trung gian inh nghainterfaceinterface+ API cng cp giao din h tr kin trc+ API cng cp giao din h tr kin trcClient Server Client Server

+ Tool: CCM, OmniIDL, Visibroker + Tool: CCM, OmniIDL, Visibroker M hnh kin trc ca CORBAM hnh kin trc ca CORBA

Vn t raVn t ra


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Vn t raVn t raNgn ng c t giao din IDLNgn ng c t giao din IDLIDL To C++, C#, DelphiIDL To C++, C#, DelphiTrin khai CORBA vi cc ToolTrin khai CORBA vi cc Tool


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HT CHNG 4

cop4 - cop - corba

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