Spring AOP 鍜?IOC 瀹瑰櫒鍏ラ棬
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綰у埆錛?鍒濈駭 Naveen Balani (naveenbalani@rediffmail.com), 鎶€鏈灦鏋勫笀, Webify Solutions 2005 騫?8 鏈?18 鏃?/p> 鍦ㄨ繖鐢變笁閮ㄥ垎緇勬垚鐨勪粙緇?Spring 妗嗘灦鐨勭郴鍒楁枃绔犵殑絎竴鏈熶腑錛屽皢寮€濮嬪涔?fàn)濡備綍鐢?Spring 鎶€鏈瀯寤鴻交閲忕駭鐨勩€佸己澹殑 J2EE 搴旂敤紼嬪簭銆俤eveloperWorks 鐨勫畾鏈熸姇紼夸漢 Naveen Balani 閫氳繃浠嬬粛 Spring 妗嗘灦寮€濮嬩簡浠栫敱涓夐儴鍒嗙粍鎴愮殑 Spring 緋誨垪錛屽叾涓繕灝嗕粙緇?Spring 闈㈠悜鏂歸潰鐨勭紪紼嬶紙AOP錛夊拰鎺у埗鍙嶈漿錛圛OC錛夊鍣ㄣ€?/blockquote> |
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- Spring澹版槑寮忎簨鍔¤鎴戜滑浠庡鏉傜殑Hibernate浜嬪姟澶勭悊涓緱鍒拌В鑴便€備嬌寰楁垜浠啀涔熸棤闇€瑕佸幓澶勭悊鑾峰緱榪炴帴銆佸叧闂繛鎺ャ€丠ibernate浜嬪姟鎻愪氦鍜屽洖婊氱瓑榪欎簺鎿嶄綔銆?
鏈枃涓昏璁蹭簡Spring 澹版槑寮忎簨鍔¤鎴戜滑浠庡鏉傜殑Hibernate浜嬪姟澶勭悊涓緱鍒拌В鑴便€?/p>
浣垮緱鎴戜滑鍐嶄篃鏃犻渶瑕佸幓澶勭悊鑾峰緱榪炴帴銆佸叧闂繛鎺ャ€丠ibernate浜嬪姟鎻愪氦鍜屽洖婊氱瓑榪欎簺鎿嶄綔銆傚啀涔熸棤< font color="#ff0000">闇€瑕佹垜浠湪涓庝簨鍔＄浉鍏崇殑鏂規(guī)硶涓鐞嗗ぇ閲忕殑try…catch…finally浠ｇ爜< /font>銆?/p>
鎴戜滑鍦ㄤ嬌鐢⊿pring 澹版槑寮忎簨鍔℃椂錛屾湁涓€涓潪甯擱噸瑕佺殑姒傚康灝辨槸浜嬪姟灞炴€с€備簨鍔″睘鎬ч€氬父鐢變簨鍔＄殑浼犳挱琛屼負(fù)錛屼簨鍔＄殑闅旂綰у埆錛屼簨鍔＄殑瓚呮椂鍊煎拰浜嬪姟鍙鏍囧織緇勬垚銆傛垜浠湪榪涜浜嬪姟鍒掑垎鏃訛紝闇€瑕佽繘琛孒ibernate浜嬪姟瀹氫箟錛屼篃灝辨槸閰嶇疆Hibernate浜嬪姟鐨勫睘鎬с€?/p>
Spring Hibernate鍦?gt;TransactionDefinition 鎺ュ彛涓畾涔夎繖浜涘睘鎬?浠ヤ緵PlatfromTransactionManager浣跨敤, PlatfromTransactionManager鏄痵pring Hibernate浜嬪姟綆＄悊鐨勬牳蹇冩帴鍙ｃ€?
浠ｇ爜
- TransactionDefinition publicinterfaceTransactionDefinition {
- intgetPropagationBehavior();
- intgetIsolationLevel();
- intgetTimeout();
- booleanisReadOnly();
- }
getTimeout()鏂規(guī)硶錛屽畠榪斿洖浜嬪姟蹇呴』鍦ㄥ灝戠鍐呭畬鎴愩€?
isReadOnly(),浜嬪姟鏄惁鍙錛屼簨鍔＄鐞嗗櫒鑳藉鏍規(guī)嵁榪欎釜榪斿洖鍊艱繘琛屼紭鍖栵紝紜繚浜嬪姟鏄彧璇葷殑銆?
getIsolationLevel()鏂規(guī)硶榪斿洖浜嬪姟鐨勯殧紱葷駭鍒紝浜嬪姟綆＄悊鍣ㄦ牴鎹畠鏉ユ帶鍒跺彟澶栦竴涓簨鍔″彲浠ョ湅鍒版湰浜嬪姟鍐呯殑鍝簺鏁版嵁銆?
鍦═ransactionDefinition鎺ュ彛涓畾涔変簡浜斾釜涓嶅悓鐨勪簨鍔￠殧紱葷駭鍒?
1) ISOLATION_DEFAULT 榪欐槸涓€涓?PlatfromTransactionManager榛樿鐨勯殧紱葷駭鍒紝浣跨敤鏁版嵁搴撻粯璁ょ殑浜嬪姟闅旂綰у埆.鍙﹀鍥涗釜涓嶫DBC鐨勯殧紱葷駭鍒浉瀵瑰簲
2) ISOLATION_READ_UNCOMMITTED榪欐槸浜嬪姟鏈€浣庣殑闅旂綰у埆錛屽畠鍏呰鍒涓€涓簨鍔″彲浠ョ湅鍒拌繖涓簨鍔℃湭鎻愪氦鐨勬暟鎹€傝繖縐嶉殧紱葷駭鍒細(xì)浜х敓鑴忚錛屼笉鍙噸澶嶈鍜屽夠鍍忚銆?/p>
3) ISOLATION_READ_COMMITTED 淇濊瘉涓€涓簨鍔′慨鏀圭殑鏁版嵁鎻愪氦鍚庢墠鑳借鍙﹀涓€涓簨鍔¤鍙栥€傚彟澶栦竴涓簨鍔′笉鑳借鍙栬浜嬪姟鏈彁浜ょ殑鏁版嵁銆傝繖縐嶄簨鍔￠殧紱葷駭鍒彲浠ラ伩鍏嶈剰璇誨嚭鐜幫紝浣嗘槸鍙兘浼?xì)鍑虹庮C笉鍙噸澶嶈鍜屽夠鍍忚銆?/p>
4) ISOLATION_REPEATABLE_READ 榪欑浜嬪姟闅旂綰у埆鍙互闃叉鑴忚錛屼笉鍙噸澶嶈銆備絾鏄彲鑳藉嚭鐜板夠鍍忚銆傚畠闄や簡淇濊瘉涓€涓簨鍔′笉鑳借鍙栧彟涓€涓簨鍔℃湭鎻愪氦鐨勬暟鎹錛岃繕淇濊瘉浜嗛伩鍏嶄笅闈㈢殑鎯呭喌浜х敓(涓嶅彲閲嶅璇?
鍦═ransactionDefinition鎺ュ彛涓畾涔変簡涓冧釜浜嬪姟浼犳挱琛屼負(fù):
1) < span style="color: #000000;"> PROPAGATION_REQUIRED 濡傛灉瀛樺湪涓€涓簨鍔★紝鍒欐敮鎸佸綋鍓嶄簨鍔°€傚鏋滄病鏈変簨鍔″垯寮€鍚竴涓柊鐨勪簨鍔?
2) PROPAGATION_SUPPORTS 濡傛灉瀛樺湪涓€涓簨鍔★紝鏀寔褰撳墠浜嬪姟銆傚鏋滄病鏈変簨鍔★紝鍒欓潪浜嬪姟鐨勬墽琛?
3) PROPAGATION_MANDATORY 濡傛灉宸茬粡瀛樺湪涓€涓簨鍔★紝鏀寔褰撳墠浜嬪姟銆傚鏋滄病鏈変竴涓椿鍔ㄧ殑浜嬪姟錛屽垯鎶涘嚭寮?
4)PROPAGATION_REQUIRES_NEW 鎬繪槸寮€鍚竴涓柊鐨勪簨鍔°€傚鏋滀竴涓簨鍔″凡緇忓瓨鍦紝鍒欏皢榪欎釜瀛樺湪鐨勪簨鍔℃寕璧?
5) PROPAGATION_NOT_SUPPORTED鎬繪槸闈炰簨鍔″湴鎵ц錛屽茍鎸傝搗浠諱綍瀛樺湪鐨勪簨鍔?
6) PROPAGATION_NEVER鎬繪槸闈炰簨鍔″湴鎵ц錛屽鏋滃瓨鍦ㄤ竴涓椿鍔ㄤ簨鍔★紝鍒欐姏鍑哄紓甯?
7) PROPAGATION_NESTED濡傛灉涓€涓椿鍔ㄧ殑浜嬪姟瀛樺湪錛屽垯榪愯鍦ㄤ竴涓祵濂楃殑浜嬪姟涓? 濡傛灉娌℃湁媧誨姩浜嬪姟, 鍒欐寜 TransactionDefinition.PROPAGATION_REQUIRED 灞炴€ф墽琛?
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spring浜嬪姟綆＄悊
Public interface PlatformTransactionManager{
TransactionStatue getTransaction(TransactionDefinition definition) throws TransactionException; Void commit(TransactionStatus status) throws TransactionException; Void rollback(TransactionStatus status) throws TransactionException;
}
Object result = tt.execute(new TransactionCallback(){
public Object doTransaction(TransactionStatus status){
updateOperation(); return resultOfUpdateOperation();
}});DefaultTransactionDefinition def= new DefaultTransactionDefinition(); //new 涓€涓簨鍔?/span>def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED); //鍒濆鍖栦簨鍔?鍙傛暟瀹氫箟浜嬪姟鐨勪紶鎾被鍨?TransactionStatus status = transactionManager.getTransaction(def); //鑾峰緱浜嬪姟鐘舵€?/span>try{ …………….. transactionManager.commit(status); //鎻愪氦浜嬪姟;}catch(…..){ transactionManager.rollback(status); //鍥炴粴浜嬪姟;}<bean id="transactionService"class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> <property name="transactionManager"> <ref local="transactionManager"/> </property> <property name="target"> <ref local="transactionServiceControl"/> </property> <property name="transactionAttributes"> <props> <prop key=”insert*”>PROPAGATION_REQUIRED,-MyCheckedException</prop><prop key=”update*”>PROPAGATION_REQUIRED</prop><prop key=”*”>PROPAGATION_REQUIRED,readOnly</prop> </props> </property></bean>]]>
public String delete(String id) {String ID = id;銆€db = new getConnection();銆€Connection con = db.getConnection();銆€try {con.setAutoCommit(false);db.executeUpdate("delete from helloworld where ID=" + ID); //鏇存柊鎿嶄綔1銆€銆€db.executeUpdate("delete from helloworld _book where ID=" + ID); //鏇存柊鎿嶄綔2銆€銆€db.executeUpdate("delete from helloworld_user where ID=" + ID); //鏇存柊鎿嶄綔3銆€銆€con.commit();//鎻愪氦JDBC浜嬪姟銆€銆€con.setAutoCommit(true); db.close();return “success”;銆€}銆€catch (Exception e) {銆€銆€con.rollBack();//鍥炴粴JDBC浜嬪姟銆€銆€e.printStackTrace();db.close();return “fail”;銆€銆€}}public String delete(String id) { String ID = id;銆€db = new getConnection();銆€db.getConnection();銆€UserTransaction transaction = sessionContext.getUserTransaction();//鑾峰緱JTA浜嬪姟銆€try {銆€銆€transaction.begin(); //寮€濮婮TA浜嬪姟銆€銆€db.executeUpdate("delete from helloworld where ID=" + ID);銆€銆€db.executeUpdate("delete from helloworld _book where ID=" + ID);銆€銆€db.executeUpdate("delete from helloworld _user where ID=" + ID);銆€銆€transaction.commit(); //鎻愪氦JTA浜嬪姟銆€銆€db.close();銆€銆€return”success”;銆€}銆€catch (Exception e) {銆€銆€try {銆€銆€銆€transaction.rollback();//浜嬪姟鍥炴粴銆€銆€}銆€銆€catch (Exception e) {銆€銆€銆€e.printStackTrace();銆€銆€}銆€銆€exc.printStackTrace();銆€銆€db.close();銆€銆€return “fail”;銆€}} ]]> 主站蜘蛛池模板： 察隅县| 札达县| 库尔勒市| 宿州市| 将乐县| 阜新| 定南县| 佛学| 资兴市| 玉门市| 林口县| 江都市| 南靖县| 建阳市| 安陆市| 方城县| 青岛市| 禹州市| 锡林浩特市| 中宁县| 贵州省| 南平市| 民乐县| 呈贡县| 珲春市| 枣强县| 衡东县| 大连市| 栾川县| 乌海市| 平阴县| 通江县| 屯留县| 西平县| 西乌| 克什克腾旗| 都兰县| 临城县| 唐海县| 天祝| 大连市|