Type 3 driver .E2.80.93 Network-Protocol driver .28middleware driver.29 JDBC driver

-



1 type 3 driver – network-protocol driver (middleware driver)

1.1 functions
1.2 advantages
1.3 disadvantages





type 3 driver – network-protocol driver (middleware driver)

schematic of network protocol driver


the jdbc type 3 driver, known pure java driver database middleware, database driver implementation makes use of middle tier between calling program , database. middle-tier (application server) converts jdbc calls directly or indirectly vendor-specific database protocol.


this differs type 4 driver in protocol conversion logic resides not @ client, in middle-tier. type 4 drivers, type 3 driver written entirely in java.


the same client-side jdbc driver may used multiple databases. depends on number of databases middleware has been configured support. type 3 driver platform-independent platform-related differences taken care of middleware. also, making use of middleware provides additional advantages of security , firewall access.


functions

sends jdbc api calls middle-tier net server translates calls dbms-specific network protocol.the translated calls sent particular dbms.
follows three-tier communication approach.
can interface multiple databases – not vendor specific.
the jdbc client driver written in java, communicates middleware-net-server using database independent protocol, , net server translates request database commands database.
thus client driver middleware communication database independent.

advantages

since communication between client , middleware server database independent, there no need database vendor library on client. client need not changed new database.
the middleware server (which can full-fledged j2ee application server) can provide typical middleware services caching (of connections, query results, etc.), load balancing, logging, , auditing.
a single driver can handle database, provided middleware supports it.
e.g.: ida server

disadvantages

requires database-specific coding done in middle tier.
the middleware layer added may result in additional latency, typically overcome using better middleware services.




^ http://docs.oracle.com/cd/e19509-01/820-5069/ggzci/index.html






Comments

Post a Comment

Popular posts from this blog

Discography Ole Paus

-
1 discography 1.1 albums 1.2 songs 1.3 opera discography albums (for peak charting positions, see norwegiancharts.com) der ute - der inne (1970) garman (1972) blues pyttsan jespersens pårørende (1973) ole bull show (with gunnar bull gundersen) (1973) zarepta (1974) lise madsen, moses og de andre (with ketil bjørnstad) (1975) i anstendighetens navn (1976) paus-posten (1977) nye paus-posten (1977) sjikaner utvalg (1978) kjellersanger (1979) noen der oppe (1982) bjørnstad/paus/hamsun (with ketil bjørnstad) (1982) svarte ringer (1982) grensevakt (1984) muggen manna (1986) stjerner rennesteinen (1989) salmer på veien hjem (with kari bremnes og mari boine)(1991) biggles testamente (1992) mitt lille land (1994) hva hjertet ser (1995) stopp pressen! det grøvste fra paus-posten (1995) to rustne herrer (with jonas fjeld) (1996) pausposten extra! (1996) det begynner å bli et liv(1998) damebesøk (with jonas fjeld) (1998) den velsignede (2000) kildens bredd (with ketil bjørnstad) (2002) tolv rustn
Read more

Gaeta class Lerici-class minehunter

-
gaeta (foreground) , numana depending on source, gaeta class ships considered either lerici subclass, or separate class of ships. the 8 ships of second series lerici class, more commonly known gaeta class, launched in 1990s, , commissioned may 1996. gaeta class identical lerici class: main structural differences between ships displacement of latter 77 tons greater, hull 2.5 metres (8.2 ft) longer, , communications mast moved above bridge forward of exhaust funnel. gaetas used improved version of vds fiar sqq-14 (it) sonar, fitted in 1991 4 lerici class ships. rov gaymarine pluto , gaymarine pluto gigas. navigation radar gem elettronica spn-753 replaced (v)9 arpa version (i band).cms evolved version (combat management system) datamat ssn-714(v)3ul. on board 1 larger hyperbaric chamber (8 seats). gaeta mlu in 2010 intermarine began mlu (mid-life update), expected complete in 2018. new sonar thales 2093 mk2, new cms (combat management system) selex es ssn-714(v)4, new containerized , remo
Read more

Driver.27s licenses used for identification purposes Driver's license

-
1 driver s licenses used identification purposes 1.1 europe 1.2 asia 1.2.1 japan 1.3 north america 1.4 south america driver s licenses used identification purposes many countries, including australia, new zealand, canada, united kingdom, , united states, have no national identification cards. many people have driver s licenses, accepted de facto proof of identity. identity cards , driver s licenses credit card size—the id-1 size , shape defined in iso/iec 7810. europe many european countries require drivers produce license on demand when driving. european countries require adults carry proof of identity @ times, driving license not valid identification in every european country. in united kingdom drivers not required carry licence. driver may required constable or vehicle examiner produce licence, may provide in specified police station within 7 days; police issue form purpose. in denmark, finland, norway, spain , sweden, driver s license number same citizen s id number. banks , auth
Read more