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CORBA ???? ??

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CORBA A Design and Implementation of a Multi-database System Based on CORBA – PowerPoint PPT presentation

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Title: CORBA ???? ??

1
CORBA ???? ???????? ???? ?? ? ??
A Design and Implementation of a Multi-database
System Based on CORBA

????? ?????? DC DB Lab
? ? ?

2
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3
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?????? ??? ??? ??

??? ??? ?
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??? ?????? ???
4
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?? ??
??? ?? ??

CORBA ??? C ??? ??? 3?? C/S ??
?? ??? ?? ???? ??? ??

?? DBMS ?????? ??
??? ????? ??

??? ?? ??
JAVA API? JDBC? ??? MDBS ??? ?? ??
5
? ?

?? ??
??-?????? ???

6
? ?

?? ??

7
?? ??

???? ???? CORBA
???? ??? - ?? ??? ?? ???? ??
JAVA ?????? ???? JDBC
?? ??? - ????? ???? ?? ?? ??? ??? ????? ??
ObjectWeb
?? ???? ???? ????? ??? 3-?? ? ???? ??

ObjectWeb
CORBA
JAVA
8
?? ??

UML(Unified Modeling Language)
??? ???? ??? ??? ??
Grady Booch? Booch ??, Jim Rumbaugh? OMT ??,
Jocobson? OOSE ?? ?
4 ??? View

Use Case View
Deployment View
Logical View
Component View
9
xCon ?? ?????? ???? ??

Sequence ????? ?? ??? ??

Server Application
xCon
Global Schema
GSI
10
??-?????? ???? ??

Sequence Diagram ?? ??? ??

Server Application
xCon
Global Schema
GSI
Table Details
administrator
1 ServerApplication()
2 xCon()
3 db SelectChoice.addItem(dname)
4 Select GDBName
5 GDBNameText.getText(db_name)
6 GlobalSchema()
7 Table Details()
8 viewResult(db_name)
9 GSI(Vector)
10 TableDetails()
11 fetchMetaData(GSI, Vector, String)
Return TableDetails
12 viewResultSet()
11
??-?????? ???? ??

Sequence Diagram ??? ??? ??? ??

Client Applet
Call Back Impl
Transmit Helper
Call Back
Server Application
xGui DBServant
DB Interface
Transmit
1 Call BackImpl(ClientApplet)
2 orb.connect(CallBackImpl)
3 TransmitHelper.narrow(DBServant)
4 transQuery(CallBack, String)
5 DBInterface(String, String, Sting, String,
String, String, xGuiDBServant)
6 createTable(String)
7 exeQuery(String)
8 setHead(String)
9 xGrid.setHead(String)
10 addRow(String)
11 xGrid.addRow(String)
12 repaint()
13 xGrid.repaint()
12
??-?????? ???? ??

Collaboration Diagram ??? ??? ??? ??

2 orb.connect(CallBackImpl)
3 TransmitHelper.narrow(DBServant)
Client Applet
Transmit Helper
Server Application
1 Call BackImpl(ClientApplet)
4 transQuery(CallBack, String)
Transmit
9 xGrid.setHead(String)
8 setHead(String)
11 xGrid.addRow(String)
10 addRow(String)
13 xGrid.repaint()
12 repaint()
Call Back Impl
xGui DBServant
5 DBInterface(String, String, Sting, String,
String, String, xGuiDBServant)
6 createTable(String)
7 exeQuery(String)
Call Back
DBInterface
13
??-?????? ???? ??

Sequence Diagram ?? ?????? ??

Client Applet
Call Back Impl
Transmit Helper
Global Schema
Server Application
xGui DBServant
DB Interface
user
administrator
RDBMS
1 ServerApplication()
2 orb.bind(DBServant)
3 xGuiDBServant()
4 init()
5 narrow(DBServant)
6 CallBackImpl(ClientApplet)
7 ClientApplet()
8 transQuery(CallBack, String)
9 fetchMetaData(GSI, Vector, String)
10 DBInterface(String, String, String, String,
String, String, String, xGuiDBServant)
11 run()
12 executeQuery(String)
13 createTable(String)
14 exeQuery(String)
15 executeQuery(String)
16 setHead(String)
17 xGrid.setHead(String)
18 addRow(String)
19 xGrid.Row(String)
20 repaint()
21 xGrid.repaint()
14
??-?????? ???? ??

IDL ??

module xCon3 interface CallBack
typedef sequence ltstringgt hdSeq typedef
sequence ltstringgt dtSeq oneway void
setHead(in hdSeq head) oneway void
addRow(in dtSeq data) oneway void repaint(
) oneway void sendMsg(in string
message) interface Transmit oneway
void transQuery(in CallBack cliRef,
in string
msg)
15
??-?????? ???? ??

3?? ??? ??

User Service
Business Service
Data Service
16
Class Diagram ??? ??? ??
Applet (from applet)
ltltInterfacegtgt CallBack (from applet)
setHead()
addRow()
repaint()
sendMsg()
_deref()
ClientApplet
iMaxRecentint
iRecentint
_Call BackImplBase (from IDLFiles)
iRecentCountint
2
gResult
init()
butLog_MouseClicked()
_CallBackImplBase()
gRecent
butExecute_MouseClicked()
_CallBackImplBase()
action()
_CallBackImplBase()
setRecent()
_CallBackImplBase()
ClientApplect()
_deref()
cliRef
logFrame
orb
cliRef
-this0
rootContext xConContext
ORB (from CORBA)
2
srvRef
ltltInterfacegtgt Transmit (from IDLFiles)
-this0
transQuery()
SymWidow
SymMouse
_deref()
17
Class Diagram ???? ??? ??
adminFrame
orb
rootContext xConContext
ORB (form CORBA)
DBServant
1..3
adminFrame
gsm
DB
gsm
con
dbServant
stmt
cli Ref
gsi
is
rs
d Database
rows
tds
tds
rows
18
??-?????? ???? ??