1Cc m hnh

kin trc ng dngKin trc Smart Client

24/4/2015

2Kin trc ng dng

Kin trc ng dng l bn thit k c cu trc ca phn mm ng dng, bao gm cc thnh phn cu thnh nn ng dng, v cc giao din vi bn ngoi.

C 1 s hnh mu thit k kin trc ng dng. Cc hnh mu ny xc nh cch thc ng dng s x l cc yu cu ngi dng v tng tc gia cc thnh phn ca ng dng

31, 2 v 3-tier

Single-tier / stand-alone:

Cc khi giao din (presentation layer), khi chc nng (business layer), khi x l d liu (data layer) u nm trong cng mt h thng

VD: ng dng vit trn ngn ng ca h qun tr CSDL Foxpro; bng tnh Excel.

Presentation

Layer

Business

Layer

Data

Layer

D

41, 2 v 3-tier

2-tier client/server:

Gm 2 thnh phn ng dng: pha client v pha server (fat/thick client)

Khi giao din v x l chc nng thuc ng dng pha client

Khi x l d liu thuc ng dng pha server

Pha Client gi truy vn CSDL ti Server v nhn kt qu

VD: cc ng dng VB truy vn CSDL SQL

Presentation

Layer

Business

Layer

Data

Layer

D Client D Server

DB Querry

Data

DB server

51, 2 v 3-tier

3-tier (n-tier) client/server:

Khi giao din nm pha my trm (thin client)

Khi x l chc nng nm trn my ch chy application server

Khi x l d liu nm trn my ch chy CSDL

D client my trm gi yu cu/nhn KQ ti/t application server

VD: Web browser web mail mail server email DB

Presentation

Layer

Business

Layer

Data

Layer

D Client DB Server

Request

Response

App server

DB Querry

Data

6Thin v Fat

Fat client:

X l chc nng ti pha my trm

Thin client:

X l chc nng ti my ch, ch gi phn giao din ti my trm

7Thin v Fat

Fat Thin client

8VD Kin trc multi-tier J2EE

9ng dng web-based

L ng dng n-tier DB Tier: chy h qun tr CSDL Application Tier: chy ng dng pha

server

Web tier: chy ng dng web server Client tier: chy web browser x l

giao din

u im Ph hp vi xu hng XL tp trung Nng cp ng dng ti 1 im, nht

qun

Khng cn ci t pha my trm

Nhc im Giao din web khng linh hot Khng h tr lu tr d liu ti ch

(VD d liu danh mc) Yu cu kt ni trc tuyn n nh

10

Rich Internet Application (RIA)

L ng dng web-based

Cung cp giao din linh hot v tng tc ta giao din desktop

Cho php ti li/cp nht tng phn ni dung trn trang

i hi ci t my o ti pha my trm

VD:

ng dng flash, java trn web

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12

Smart client

Linh hot trong la chn gia mc Fat v Thin

Kt hp cc li ch ca 2 m hnh Fat v Thin

Fat

Clients

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Cc tnh cht ca smart client

Tn dng cc ti nguyn cc b

Tn dng cc ti nguyn mng

H tr m hnh kt ni khng thng xuyn

D dng ci t v nng cp ng dng

Cung cp thit b pha khch mm do

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S dng ti nguyn cc b Cho php chy cc on m ti my trm

truy cp ti nguyn cc b VD: my in, my c m vch, d liu t cc

phn mm cc b khc

Giao din ngi dng linh hot Giao din desktop linh hot, quen thuc, nht

qun

Ct dn vi ng dng khc

Kh nng x l d liu pha my trm Cache d liu

Gim thiu ti mng v tnh ton pha server

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S dng ti nguyn mng

Cc ti nguyn tp trung pha server c th c chia s qua mng cho pha client

Cc ng dng pha client l mt phn ca gii php ng dng phn tn

Cho php tng hp, ng b d liu gia cc mc

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H tr kt ni khng thng xuyn

Hot ng c trong cc trng hp

Mng khng kt ni thng trc

Bng thng hn ch / khng n nh

S dng cache / CSDL tm thi duy tr cc kh nng nhp liu c bn v ng b vi pha server khi mng n nh tr li

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D ci t v nng cp Trnh c cc vn ci t & nng cp i vi m

hnh fat client truyn thng i hi mi trng, cu hnh ci t phc tp

Phi ci t ring r ti tng im

Khng m bo s ng nht gia cc bn ci t

Cch thc Copy file hoc download file t my ch qua phng thc

trin khai no-touch deployment

Ci t/cp nht t ng qua phng thc push s dng gii php system management server (sms)

C th gii hn trin khai ti 1 nhm th im

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S mm do v thit b client C th vit nhiu phin bn client cho cc

thit b u cui khc nhau

PC, tablet

Cho php ct gt tnh nng i vi cc phin bn

Cc thit b u cui di ng c th ch ng vai tr nhp v tng hp d liu v server, truy cp ti 1 phn d liu v chc nng

19

Cc dng ng dng smart client

Trn Windows

S dng giao din win-forms

D Client c th ch thc hin giao din hoc c cc tnh nng x l d liu phc tp

Ph hp vi cc D i hi giao din ha cao, x l hiu sut cao, cho php trao i vi cc D desktop khc

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Cc dng ng dng smart client

Cc ng dng trong b Office

Chia s d liu chung qua mng

Dng nh dng XML

S dng web services: WSDL (Web Service Definition Language), UDDI (Universal

Description Discovery and Integration)

21

Cc dng ng dng smart client

Cc ng dng di ng

Chy trn .Net compact framework

Chy vi giao din nhp liu v truy vn d liu c bn, x l tp trung pha server

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La chn gia Thin v Smart

Tnh nng Thin Smart

Giao din a dng Ph thuc giao din browser

Giao din desktop

S dng phn cng cc b

Phi qua COM Nh D desktop

Trao i vi D khc Khng Nh D desktop

X l a lung Khng Nh D desktop

X l ngoi tuyn Khng Nh D desktop

D ci t, nng cp C Ty la chn

H tr nhiu thit b cui C C

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Cc ch tm hiu

24

Chn 1 trong cc ch

1. X l d liu

2. Kt ni trao i d liu

3. Kt ni khng thng xuyn

4. An ninh ng dng

5. X l a lung

6. Trin khai v hiu sut ng dng

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1. X l d liu

Client c kh nng x l d liu

D liu c th c ng dng pha server cung cp

D liu cng c th c lu m (cached) li v cp nht ti pha client

Do c nhiu hot ng cp nht d liu ng thi t cc D client, cn c c ch ng b, gii quyt xung t d liu

26

1. X l d liu

Phn loi d liu Tnh (ch c): danh mc, thng tin hin th ng: thm, xa, sa

Lu m Lu ngn hn Lu di hn trong CSDL cc b ng b v gii quyt xung t

X l tng tranh Phng thc bi quan: kha DL cho ti cui giao

dch Phng thc lc quan: cp nht song song v kim

tra xung t ni dung

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2. Kt ni trao i d liu

C th l kt ni vi tin trnh cc b hoc ng dng server qua mng

Hnh thc kt ni Kt ni cht: object-object

Kt ni lng: qua thng ip mng

Cc phng thc trao i d liu .Net Enterprise Services (COM+)

.Net Remoting (RPC)

Message Queuing (MSMQ)

Web Services (SOAP)

COM+

28

RPC

29

30

31

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3. Kt ni khng thng xuyn

Dng cho cc client c kt ni khng thng xuyn

Hai cch tip cn M hnh ng b

hng d liu (data centric)

M hnh ng b hng dch v (service oriented)

33

4. An ninh ng dng

Cc vn v an ninh ng dng

Xc thc (authentication)

Phn quyn (authorization)

Tra sot d liu (data validation)

Bo v DL nhy cm

Kim ton v ghi nht k

X l cc s kin ngoi l

QL cu hnh v thay i

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5. X l a lung

35

5. X l a lung

Mc nh ng dng chy 1 lung (thread), qun l giao din NSD (UI)

Li gi ng b (synchronous call) C th gy ngng D khi thc hin gi dch v qua mng

Li gi khng ng b (asyn. Call) To lung mi, khng gy ngng D

Lung chy mt tin giao din Tin trnh kt thc khi cc lung ny kt thc

Lung chy ngm Khi tin trnh kt thc cc lung ny kt thc

Vn x l iu kin ganh ua (race condition) khi chy a lung

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6. Ci t v nng cpHiu sut ng dng

Cc phng thc trin khai

No-touch deployment

Copy file vo web server, .Net s download cc thnh phn ph thuc khi ngi dng click lin kt

No-touch dep. vi application stub

Ti chng trnh download t ng ng dng v

Chy trc tip qua chia s tp

Chy xcopy copy nguyn h thng th mc

S dng b ci windows installer packages

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6. Ci t v nng cpHiu sut ng dng

Vn hiu sut

Cache d liu thch hp

Ti u phng thc trao i thng ip qua mng

S dng lung

S dng transaction cc b v phn tn hiu qu

Ti u thi gian khi ng

QL ti nguyn mng hiu qu (thu, g/phng)

Ti u ti d liu vo giao din win forms

38

Yu cu v bo co kt qu

39

nh dng v trnh by ti liu

nh dng tp: powerpoint

Trang tiu : ghi r 1 trong 6 ch chn

Trang tc gi: danh sch nhm thc hin v m t cng vic ca tng thnh vin

40

Ti liu v phn nhm

Ti liu Smart Client Architecture and Design

Guide

Nhm Ti a 04 thnh vin / nhm

Bo co Gi ti: hung.hoangquoc@gmail.com

Thi gian: trc 15/5/2014

22/5/2013: trnh by ca 1 s nhm

41

Ni dung

Tm tt ch chn v kin trc smart client

nh gi so snh vi kin trc khc (VD n-tier web-based)

Minh ha on m hoc ng dng