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鏈瘒鎶鏈枃绔犱粙緇峉pring AOP鐨勫疄鐜般?nbsp; 闃呰鍏ㄦ枃
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鏈瘒鎶鏈枃绔犲皢浣滀負Spring鍏ラ棬綃囥?
闃呰鍏ㄦ枃
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璇存槑:
鏈。鐨勯厤緗粡榪囨湰浜烘祴璇曪紝閮借兘姝ｇ‘榪愯銆?
榪愯鐜錛?Jdk5.0, Spring-2.5, Spring-modules-0.9錛?ehcache-1.6.0-beta4.jar 闃呰鍏ㄦ枃
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闃呰鍏ㄦ枃
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鍏跺疄鍦⊿pring瀹樻柟緗戠珯灝辨槸鍏蜂綋鐨勪粙緇嶏紝涓嬮潰鏈漢瀵瑰叾璇戞垚浜嗕腑鏂?濡傛湁緲昏瘧涓嶅綋涔嬪錛屾暚璇峰悇浣嶆寚姝ｃ?nbsp; 闃呰鍏ㄦ枃
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鎸夌収瀹樻柟3.0鐗堟湰寮鍙戠殑璇存槑錛孲pring 2.5.6灝嗕細鏄疭pring 2.5鍒嗘敮鐨勬渶鍚庝竴涓増錛屾暣涓紑鍙戝洟闃熷皢浼氬叏鍔涙姇鍏ュ埌 3.0鐗堟湰鐨勫紑鍙戝伐浣溿?.0鐗堢殑MVC灝嗕細瀵筊est榪涜鏀寔銆?
Spring 3.0 is in progress now! view roadmap click here 闃呰鍏ㄦ枃
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鍏充簬LazyLoadException寮傚父錛屼嬌鐢ㄨ繃Hibernate O/R Mapping宸ュ叿鐨勪漢搴旇閮介亣鍒拌繃錛岀綉涓婁篃鏄湁寰堝瑙ｅ喅鐨勬柟妗堬紝鍏朵腑Spring鎻愪緵鐨勪竴涓柟妗堝氨鏄湪web.xml澧炲姞涓涓猣ilter,紺轟緥浠ｇ爜濡備笅:
<filter>
<filter-name>entityManager</filter-name>
<filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>entityManagerFilter</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>
<filter-name>entityManager</filter-name>
<filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>entityManagerFilter</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>
瑙ｅ喅鍔炴硶鏈変簡錛屾帴涓嬫潵搴旇浼氭湁浜哄ソ濂囷細榪欎釜閰嶇疆filter鍚庡畠鏄浣曞伐浣滅殑錛?br /> 涓嬮潰鏉ュ垎鏋愪竴涓嬭繖涓姛鑳藉疄鐜扮殑婧愪唬鐮? 涓嶈繃涔嬪墠錛屾瘮杈冮噸瑕佺殑鏄簡瑙ｏ紝涓轟綍浼氬嚭鐜發(fā)azyload exception鐨勫紓甯稿彂鐢熴?br />
涓嬮潰鎴戞ā鎷熷啓浜嗕竴孌典唬鐮侊紝榪欐浠ｇ爜灝變細鍙戠敓璇ュ紓甯?br /> 娉細鍙槸涓轟簡璇存槑錛岀浉鍏崇殑浠ｇ爜灝辯渷鐣ヤ簡銆?br />
@Entity
public class Room {
@Id
@Column(length=32)
private String id;
@Column(length=20)
private code;
@OneToMany(mappedBy="room") //default is use lazy load strategy
private Set desks;
}
@Entity
public class Desk {
@Id
@Column(length=32)
private String id;
@Column(length=20)
private code;
@ManyToOne
private Room root;
}
public class RoomSerivce {
@Transactional(readOnly=true)
public Room getRoomById(String roomId) {
Assert.notBlank(roomId, "room'id is null);
return getDao().findById(roomId);
}
}
public class Room {
@Id
@Column(length=32)
private String id;
@Column(length=20)
private code;
@OneToMany(mappedBy="room") //default is use lazy load strategy
private Set desks;
}
@Entity
public class Desk {
@Id
@Column(length=32)
private String id;
@Column(length=20)
private code;
@ManyToOne
private Room root;
}
public class RoomSerivce {
@Transactional(readOnly=true)
public Room getRoomById(String roomId) {
Assert.notBlank(roomId, "room'id is null);
return getDao().findById(roomId);
}
}
1 public class RoomServiceTest {
2
3 public static void main(String[] args[]) {
4
5 //get service from spring beanfactory
6 RoomService service = SpringContext.getSerivce("roomService");
7 Assert.notNull(service, " roomService bean not exsit");
8
9 Room room = service.getRoomById("1");
10 //here lazy exception throw out
11 Set Desks = room.getDesks();
12 CollectionsUtils.toString(Desks);
13 }
14 }
2
3 public static void main(String[] args[]) {
4
5 //get service from spring beanfactory
6 RoomService service = SpringContext.getSerivce("roomService");
7 Assert.notNull(service, " roomService bean not exsit");
8
9 Room room = service.getRoomById("1");
10 //here lazy exception throw out
11 Set Desks = room.getDesks();
12 CollectionsUtils.toString(Desks);
13 }
14 }
鍒嗘瀽榪欐浠ｇ爜錛屾垜浠笉闅懼彂鐜幫紝鍦≧oomServiceTest榪欎釜嫻嬭瘯鐨勪緥瀛愪腑錛屽洜涓轟嬌鐢ㄤ簡鍩轟簬Annotation鐨勫０鏄庢т簨鍔★紝鎵浠ュ湪RoomSerivce.getRoomById鏂規(guī)硶榪愯緇撴潫鍚庯紝浜嬪姟灝卞凡緇忔彁浜や簡銆備絾紺轟緥涓璕oom瀹炰綋涓嶥esk瀹炰緥鐨勫叧緋諱嬌鐢ㄧ殑鏄痩azy fetch鐨勭瓥鐣ワ紝姝ゆ椂Room瀵硅薄涓殑desks闆嗗悎榪樻槸涓虹┖銆?br /> 褰撴墽琛屽埌涓嬮潰涓ゅ彞鏃?榪欐墠鐪熸浣跨敤鍒癲esks闆嗗悎鏃?
Set Desks = room.getDesks();
CollectionsUtils.toString(Desks);
Hibernate灝變細鏍規(guī)嵁鍘熸潵lazy璁懼畾鐨勬柟寮忥紝鍙朎ntityManager錛?鏍規(guī)嵁瀹冧粠鏁版嵁搴撴煡璇?Desk瀹炵幇鐨勬暟鎹紝榪欐椂涓婇潰鎴戜滑宸茬粡鎻愬埌錛屼簨鍔″凡緇忛殢getRoomById鏂規(guī)硶鐨勮繍琛岀粨鏉熸彁浜? EntityManager瀵硅薄涔熷凡緇忓叧闂傛鏃跺啀璋冪敤 EntityManager鎿嶄綔錛屽氨浼氭姤EntityManager has been closed 寮傚父(lazy load exception)
ok, 娓呮榪欏潡錛屽ぇ瀹舵湁鏃跺彲鑳戒篃鐚滄兂鍒頒簡Spring榪欎釜瑙ｅ喅鏂規(guī)鏄庝箞澶勭悊鐨勪簡銆?br /> Spring鐨凾ransactionInterceptor 鍏跺氨鏄氳繃AOP璐熻矗鎷︽埅鐫鎵鏈夐拡瀵逛簨鍔ransactionManager鐨勬搷浣?
榪欐牱Spring灝卞彲浠ラ拡瀵筶azy寮傚父榪涜鎷︽埅浜嗐?br />
娓呮涓婇潰鐨勫悗錛屼笅闈㈢殑浠ｇ爜鏄潪甯稿ソ鐞嗚В浜嗭紝鏉ョ湅涓涓婳penEntityManagerInViewFilter鐨勪唬鐮?
鎴戝姞浜嗕簺娉ㄩ噴錛屽ぇ瀹跺緢瀹規(guī)槗鏄庣櫧:
1 protected void doFilterInternal(
2 HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
3 throws ServletException, IOException {
4
5 //閫氳繃WebApplicationContext,浠嶹eb鏈嶅姟涓彇寰梒ontext瀹炰緥鍚庯紝鏍規(guī)嵁EntityManagerFactory.class綾誨瀷
6 //鍙栧緱EntityManagerFacotry瀹炰緥
7 EntityManagerFactory emf = lookupEntityManagerFactory(request);
8 boolean participate = false;
9
10 //濡傛灉闈欐佹柟娉昲asResource宸茬粡鏈塃ntityManagerFactory瀹炰緥浜嗭紝灝變笉鐢ㄥ啀閫氳繃
11 //EntityManagerFactory鍒涘緩涓涓柊EntityManger浜?/span>
12 if (TransactionSynchronizationManager.hasResource(emf)) {
13 // Do not modify the EntityManager: just set the participate flag.
14 participate = true;
15 }
16 else {
17 logger.debug("Opening JPA EntityManager in OpenEntityManagerInViewFilter");
18 try {
19 //閫氳繃EntityManagerFactory鍒涘緩涓涓柊EntityManger,騫墮氳繃bindResource鏂規(guī)硶
20 //淇濆瓨鍒癟ransactionSynchronizationManager涓?br /> 21 //榪欐牱錛岄歍ransactionSynchronizationManager鐨刧etResource鏂規(guī)硶鍙栧緱EntityMangerHolder
22 EntityManager em = createEntityManager(emf);
23 TransactionSynchronizationManager.bindResource(emf, new EntityManagerHolder(em));
24 }
25 catch (PersistenceException ex) {
26 throw new DataAccessResourceFailureException("Could not create JPA EntityManager", ex);
27 }
28 }
29
30 try {
31 filterChain.doFilter(request, response);
32 }
33
34 finally {
35 if (!participate) {
36 //姣忔璇鋒眰緇撴潫鍚庯紝灝辨妸EntityManager鍏抽棴
37 EntityManagerHolder emHolder = (EntityManagerHolder)
38 TransactionSynchronizationManager.unbindResource(emf);
39 logger.debug("Closing JPA EntityManager in OpenEntityManagerInViewFilter");
40 EntityManagerFactoryUtils.closeEntityManager(emHolder.getEntityManager());
41 }
42 }
43 }
44
2 HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
3 throws ServletException, IOException {
4
5 //閫氳繃WebApplicationContext,浠嶹eb鏈嶅姟涓彇寰梒ontext瀹炰緥鍚庯紝鏍規(guī)嵁EntityManagerFactory.class綾誨瀷
6 //鍙栧緱EntityManagerFacotry瀹炰緥
7 EntityManagerFactory emf = lookupEntityManagerFactory(request);
8 boolean participate = false;
9
10 //濡傛灉闈欐佹柟娉昲asResource宸茬粡鏈塃ntityManagerFactory瀹炰緥浜嗭紝灝變笉鐢ㄥ啀閫氳繃
11 //EntityManagerFactory鍒涘緩涓涓柊EntityManger浜?/span>
12 if (TransactionSynchronizationManager.hasResource(emf)) {
13 // Do not modify the EntityManager: just set the participate flag.
14 participate = true;
15 }
16 else {
17 logger.debug("Opening JPA EntityManager in OpenEntityManagerInViewFilter");
18 try {
19 //閫氳繃EntityManagerFactory鍒涘緩涓涓柊EntityManger,騫墮氳繃bindResource鏂規(guī)硶
20 //淇濆瓨鍒癟ransactionSynchronizationManager涓?br /> 21 //榪欐牱錛岄歍ransactionSynchronizationManager鐨刧etResource鏂規(guī)硶鍙栧緱EntityMangerHolder
22 EntityManager em = createEntityManager(emf);
23 TransactionSynchronizationManager.bindResource(emf, new EntityManagerHolder(em));
24 }
25 catch (PersistenceException ex) {
26 throw new DataAccessResourceFailureException("Could not create JPA EntityManager", ex);
27 }
28 }
29
30 try {
31 filterChain.doFilter(request, response);
32 }
33
34 finally {
35 if (!participate) {
36 //姣忔璇鋒眰緇撴潫鍚庯紝灝辨妸EntityManager鍏抽棴
37 EntityManagerHolder emHolder = (EntityManagerHolder)
38 TransactionSynchronizationManager.unbindResource(emf);
39 logger.debug("Closing JPA EntityManager in OpenEntityManagerInViewFilter");
40 EntityManagerFactoryUtils.closeEntityManager(emHolder.getEntityManager());
41 }
42 }
43 }
44
涓婇潰鐨勪唬鐮佸氨涓嶇敤澶氳В閲婁簡錛?鍒扮幇鍦ㄥ凡緇忓緢娓呮鐭ラ亾Spring閽堝 Hibernate鐨凩azy闂鏄庝箞瑙ｅ喅鐨勩?br /> 褰撶劧鎴戜滑鍙互鎵╁睍鍒伴櫎Web鏈嶅姟浠ュ錛屾潵瀹炵幇瑙ｅ喅lazy鐨勯棶棰樸?鎴戜滑鑷繁鏉ョ鐞員ransactionSynchronizationManager灝卞彲浠ヤ簡)
褰撶劧Spring閽堝 Hibernate(闈濲PA鐨勫疄鐜?鍘熺悊涔熸槸涓鏍鳳紝鍙槸瀹冮拡瀵圭殑SessionFactory,涔熸槸鐢盩ransactionSynchronizationManager鏉ョ粺涓綆＄悊銆?br />
鏈鍚庡鏋滃ぇ瀹跺榪樻湁涓嶆竻妤氱殑錛屾榪庝竴璧瘋璁恒?br />
Good Luck!
Yours Matthew!
]]>
鍖呮嫭寰堝鏂板姛鑳斤紝濡傛爣棰樹腑鎻愬埌鐨凴estful鐨勬敮鎸侊紝榪樻湁Servlet3.0鐨勬敮鎸佺瓑銆?br /> 澶ф鎬葷粨浜嗕竴涓嬶紝Spring3.0涓細鍖呮嫭浠ヤ笅涓浜涙柊鐗規(guī)?
- 1. Full scale REST support by means of additions to the Spring MVC API - already pretty detailed, and apparently going to be included in the first milestone release
- 2. Support for Unified EL (as seen in Spring Web Flow) - very likely part of 3.0, but no details given
- 3. Annotation support for declaring factory methods - as above
- 4 .Support for Portlet 2.0 (JSR 286), including resource requests (ResourceServingPortlet) - as above
- 5. "Preparations" for Servlet 3.0 specification - sounded a lot like architectural preparations not visible to the "consumer"
- 6. Something to fill the gap between Spring Web Flow and Spring MVC - that sounded very vague
- 7. Inclusion (probably generalisation) of the repeat, retry and resume semantics provided by Spring Batch - was only hinted at, no details given
- 8. Inclusion of the OXM support provided by Spring WS - sounded pretty definitive, but no details given
- 9. Some kind of site definition language for the web stack - no idea whether this is more than a rumour
- 10. Model-based validation for use both in server and client - as above
涓嬮潰鎴戜滑鍏蜂綋浠嬬粛涓涓婻estful璇ョ壒鎬?
鍒氭墠鎴戜篃鎻愬埌浜嗭紝Spring3.0鏄熀浜庡叾鐩墠鎻愪緵鐨凷pring MVC妗嗘灦涓婂紩鍏ュRest鐨勬敮鎸侊紝榪欐牱浣垮叾鍙互寰堝ソ鐨勮瀺鍚堝埌Spring涓?br /> 涓嬮潰鏈変竴孌典唬鐮侊紝澶у鐪嬩簡浼氭洿鏈変綋浼氥?br /> 鍏堢湅涓涓嬪浣曞彂甯僐est椋庢牸鐨勬湇鍔℃帴鍙?br />
1 @RequestMapping(value = "/gadgets/{id}",
2 method = RequestMethod.GET)
3 public View getGadget(@PathParam String id) {
4 // 鍔熻兘鏄牴鎹?id 鏌ヨ Gadget瀵硅薄
5 // 榪斿洖View瀵硅薄
6 }
7
鐪嬪埌浣跨敤Annotation鏂瑰紡錛屼唬鐮侀潪甯哥畝媧併侤RequestMapping鏄璁挎眰鐨勮祫婧愯繘琛屾湇鍔＄殑緇戝畾錛?value鎸囧畾鏈嶅姟鐨勮祫婧愯礬寰? method鏄寚Rest椋庢牸涓殑CRUD鐨勬柟娉曘?br />
@PathParam鏄璧勬簮璺箞鍙傛暟鐨勮В鏋?瀹冧細鑷姩鏍規(guī)嵁鎻愪氦鐨勬暟鎹牸寮忥紝瑙ｆ瀽鍙傛暟鍊箋?br />
2 method = RequestMethod.GET)
3 public View getGadget(@PathParam String id) {
4 // 鍔熻兘鏄牴鎹?id 鏌ヨ Gadget瀵硅薄
5 // 榪斿洖View瀵硅薄
6 }
7
涓嬮潰鏉ョ湅涓涓?strong>RestTemplate錛屽Rest鏈嶅姟鎺ュ彛鐨勮皟鐢?
1 // 浣跨敤getForObject鎵ц鏌ヨ鎿嶄綔
2 // (鎸囧畾鍙傛暟鎻愪氦鏂瑰紡)
3 RestTemplate template = new RestTemplate();
4 Gadget gadget = template.getForObject(
5 "http://www.springify.com/gadgets/{id}",
6 Gadget.class, 1);
7
8 // 浣跨敤postForLocation 鎵ц鏂板鎿嶄綔
9 // (鎸囧畾鍙傛暟鎻愪氦鏂瑰紡,浣跨敤Map瀵硅薄)
10 Map<String, String> params =
11 new HashMap<String, String>();
12 params.put("id", 42);
13 URI uri = template.postForLocation(
14 "http://www.springify.com/gadgets/{id}/features",
15 new Feature("Glows in the dark."), params);
16
17 // 鍒犻櫎鎿嶄綔鐨勬紨紺?/span>
18 template.delete(
19 "http://www.springify.com/gadgets/{id}", someId);
20
21
29
2 // (鎸囧畾鍙傛暟鎻愪氦鏂瑰紡)
3 RestTemplate template = new RestTemplate();
4 Gadget gadget = template.getForObject(
5 "http://www.springify.com/gadgets/{id}",
6 Gadget.class, 1);
7
8 // 浣跨敤postForLocation 鎵ц鏂板鎿嶄綔
9 // (鎸囧畾鍙傛暟鎻愪氦鏂瑰紡,浣跨敤Map瀵硅薄)
10 Map<String, String> params =
11 new HashMap<String, String>();
12 params.put("id", 42);
13 URI uri = template.postForLocation(
14 "http://www.springify.com/gadgets/{id}/features",
15 new Feature("Glows in the dark."), params);
16
17 // 鍒犻櫎鎿嶄綔鐨勬紨紺?/span>
18 template.delete(
19 "http://www.springify.com/gadgets/{id}", someId);
20
21
29
鎬葷粨錛氬彲浠ョ湅鍒頒嬌鐢≧est椋庢牸鐨勬湇鍔″彂甯冿紝鍙互瀵規(guī)湇鍔¤祫婧愯繘琛岀粺涓鐨勭鐞嗭紝浣跨敤鍙戝竷鐨勬帴鍙ｆ洿娓呮櫚銆?br />
褰撶劧鍦⊿pring 3.0 鍙戝竷涔嬪墠錛屼笂榪扮殑API錛宎nnotation鍙兘浼氭湁鍙樺姩錛屾垜浠篃鏈熷緟Spring鑳戒笌鎴戜滑鏃╂棩瑙侀潰銆?br />
鏈鍚庯紝鐢變簬鏈漢瀵筊est鎶鏈簡瑙ｈ繕涓嶆槸澶繁鍏ワ紝涔熷笇鏈涘ぇ瀹惰兘澶氭彁浜涙剰瑙佸拰寤鴻銆?br />
Good Luck!
Yours Matthew!
]]>
]]>
]]>
<endpoint input-channel="inputChannel"
default-output-channel="outputChannel"
handler-ref="helloService"
handler-method="sayHello"/>
<beans:bean id="helloService" class="org.springframework.integration.samples.helloworld.HelloService"/>
default-output-channel="outputChannel"
handler-ref="helloService"
handler-method="sayHello"/>
<beans:bean id="helloService" class="org.springframework.integration.samples.helloworld.HelloService"/>
1 public class HelloService {
2
3 public String sayHello(String name) {
4 return "Hello " + name;
5 }
6 }
2
3 public String sayHello(String name) {
4 return "Hello " + name;
5 }
6 }
涓婇潰榪欎釜渚嬪瓙灝辨紨紺轟簡鎶?HelloService閰嶇疆鎴愪竴涓狹essageEndpoint緇勪歡錛屾秷鎭粠"inputChannel"闃熷垪鎺ユ敹鍚庯紝
璋冪敤HelloService.sayHello鏂規(guī)硶錛岀瓑sayHello鏂規(guī)硶榪斿洖鍚庯紝鏍規(guī)嵁default-output-channel="outputChannel"鐨勯厤緗?br /> 鎶婅繑鍥炵殑緇撴灉淇濆瓨鍒癿essage.payload灞炴у悗鍙戦佺粰"outputChannel"闃熷垪
涔熷彲鏀規(guī)垚Annotation鐨勬柟寮忥紝閰嶇疆鏂規(guī)硶濡備笅錛?br />
<annotation-driven/>
<message-bus auto-create-channels="true"/>
<context:component-scan base-package="org.springframework.integration.samples.helloworld"/>
<beans:bean id="helloService" class="org.springframework.integration.samples.helloworld.HelloService"/>
<message-bus auto-create-channels="true"/>
<context:component-scan base-package="org.springframework.integration.samples.helloworld"/>
<beans:bean id="helloService" class="org.springframework.integration.samples.helloworld.HelloService"/>
1 @MessageEndpoint(input="inputChannel", defaultOutput="outputChannel")
2 public class HelloService {
3
4 @Handler
5 public String sayHello(String name) {
6 return "Hello " + name;
7 }
8 }
2 public class HelloService {
3
4 @Handler
5 public String sayHello(String name) {
6 return "Hello " + name;
7 }
8 }
璁劇疆騫跺彂鎿嶄綔灞炴?br /> xml閰嶇疆錛?br />
<endpoint input-channel="exampleChannel" handler-ref="exampleHandler"/>
<!-- 璁劇疆騫跺彂璁劇疆 core鏍稿績綰跨▼鏁?nbsp;max鏈澶х嚎紼嬫暟 queue-capacity 闃熷垪鏈澶ф秷鎭暟 keep-alive idle綰跨▼鐢熷懡鏃墮棿-->
<concurrency core="5" max="25" queue-capacity="20" keep-alive="120"/>
</endpoint>
<!-- 璁劇疆騫跺彂璁劇疆 core鏍稿績綰跨▼鏁?nbsp;max鏈澶х嚎紼嬫暟 queue-capacity 闃熷垪鏈澶ф秷鎭暟 keep-alive idle綰跨▼鐢熷懡鏃墮棿-->
<concurrency core="5" max="25" queue-capacity="20" keep-alive="120"/>
</endpoint>
annotation閰嶇疆
1 @MessageEndpoint(input="fooChannel")
2 @Concurrency(coreSize=5, maxSize=20, queueCapacity=20, keepAliveSeconds=120)
3 public class FooService {
4
5 @Handler
6 public void bar(Foo foo) {
7
8 }
9 }
2 @Concurrency(coreSize=5, maxSize=20, queueCapacity=20, keepAliveSeconds=120)
3 public class FooService {
4
5 @Handler
6 public void bar(Foo foo) {
7
8 }
9 }
涓嬮潰鎬葷粨涓涓嬪父瑙佺殑annotation鐨勪嬌鐢ㄦ柟娉?br /> @MessageEndpoint
瀹冭〃紺哄鐞嗘秷鎭璞＄殑緇堢鑺傜偣銆備竴鑸笌鍏跺畠鐨勫厓鏁版嵁鏍囪涓璧蜂嬌鐢ㄣ?br /> 涓嬮潰浼氬叿浣撲粙緇嶄笌璇ュ厓鏁版嵁鏍囪涓璧蜂嬌鐢ㄧ殑鍏跺畠鏍囪瘑鐨勪嬌鐢ㄦ柟娉曘?br />
@MessageEndpoint婧愪唬鐮侊細
1 @Target(ElementType.TYPE)
2 @Retention(RetentionPolicy.RUNTIME)
3 @Inherited
4 @Documented
5 @Component
6 public @interface MessageEndpoint {
7
8 String input() default ""; //鎺ユ敹娑堟伅鐨勯槦鍒楀悕縐?/span>
9 String defaultOutput() default ""; //榛樿鍙戦佹秷鎭殑闃熷垪鍚嶇О(鍙湁鍦ㄤ笉璁劇疆@Router鎯呭喌涓嬫墠鏈夋晥)
10 int pollPeriod() default 0; //鍙戦佹秷鎭殑杞驚鏃墮棿闂撮殧(鍙湁鍦ㄤ笉璁劇疆@Router鎯呭喌涓嬫墠鏈夋晥)
11 }
2 @Retention(RetentionPolicy.RUNTIME)
3 @Inherited
4 @Documented
5 @Component
6 public @interface MessageEndpoint {
7
8 String input() default ""; //鎺ユ敹娑堟伅鐨勯槦鍒楀悕縐?/span>
9 String defaultOutput() default ""; //榛樿鍙戦佹秷鎭殑闃熷垪鍚嶇О(鍙湁鍦ㄤ笉璁劇疆@Router鎯呭喌涓嬫墠鏈夋晥)
10 int pollPeriod() default 0; //鍙戦佹秷鎭殑杞驚鏃墮棿闂撮殧(鍙湁鍦ㄤ笉璁劇疆@Router鎯呭喌涓嬫墠鏈夋晥)
11 }
@Handler
娑堟伅鍥炶皟澶勭悊鐨勬柟娉曘備笌@MessageEndpoint涓璧烽厤緗?span style="color: red;">(鍙檺M3鐗堬紝M4浠ュ強鍚庣畫鐗堟湰鍙互鍗曠嫭浣跨敤,鍏蜂綋浣跨敤鏂規(guī)硶榪樿絳夊叿浣撶殑瀹炵幇鍑烘潵)錛屾敹鍒癷nput闃熷垪鐨勬秷鎭悗錛屽洖璋傽Handler鏍囪瘑鐨勬柟娉?br /> 鍥炶皟鏂規(guī)硶鐨勫弬鏁扮被鍨嬪繀欏諱笌message.payload灞炴х被鍨嬬浉鍚?br /> 娉細濡傛灉鍥炶皟鏂規(guī)硶鏈夎繑鍥炲? 鍒欏洖璋冩柟娉曞鐞嗗畬鎴愬悗錛屼細灝嗚繑鍥炲艱緗埌message.payload灞炴у悗錛?br /> 鍙戦佹秷鎭埌@MessageEndpoint鐨刣efaultOutput闃熷垪銆傚鏋渄efaultOutput娌℃湁璁懼畾錛屽垯灝嗘姏鍑哄紓甯搞?br />
@Handler婧愪唬鐮侊細
1 @Target({ElementType.METHOD, ElementType.ANNOTATION_TYPE})
2 @Retention(RetentionPolicy.RUNTIME)
3 @Inherited
4 @Documented
5 public @interface Handler {
6
7 }
2 @Retention(RetentionPolicy.RUNTIME)
3 @Inherited
4 @Documented
5 public @interface Handler {
6
7 }
涓嬮潰鐨勪緥瀛愭紨紺轟簡錛屼粠"channel1"闃熷垪鎺ユ敹娑堟伅鍚庣敱@Handler鏍囪鐨勬柟娉曞鐞嗐傛秷鎭殑payload灞炴у肩殑綾誨瀷蹇呴』涓庢柟娉曠殑鍙傛暟綾誨瀷鐩稿悓
1 @MessageEndpoint(input="channel1")
2 public class FooService {
3
4 @Handler
5 public void bar(Foo foo) {
6
7 }
8 }
2 public class FooService {
3
4 @Handler
5 public void bar(Foo foo) {
6
7 }
8 }
@Polled
蹇呴』涓嶡MessageEndPoint 涓璧蜂嬌鐢ㄣ備絾涔熷彲浠ヤ笌@Router,@Splitter鏍囪瘑閰嶅悎浣跨敤錛屽悗闈㈠啀鍒嗗埆涓句緥璇存槑銆?br /> @Polled 鐢ㄤ簬寮鍚竴涓疆寰殑鏂瑰紡璋冪敤鏂規(guī)硶鐨勫姛鑳?br /> 瀹冩湁涓変釜鍙傛暟錛?br /> period: 杞驚鏃墮棿闂撮殧(鍗曚綅:寰) 榛樿涓?1000
initialDelay: 杞驚寤惰繜鏃墮棿(鍗曚綅:寰) 榛樿涓?
fixedRate: 榛樿涓篺alse
@Polled 婧愪唬鐮?br />
1 @Target(ElementType.METHOD)
2 @Retention(RetentionPolicy.RUNTIME)
3 @Inherited
4 @Documented
5 public @interface Polled {
6 int period() default 1000;
7 long initialDelay() default PollingSchedule.DEFAULT_INITIAL_DELAY;
8 boolean fixedRate() default PollingSchedule.DEFAULT_FIXED_RATE;
9
10 }
2 @Retention(RetentionPolicy.RUNTIME)
3 @Inherited
4 @Documented
5 public @interface Polled {
6 int period() default 1000;
7 long initialDelay() default PollingSchedule.DEFAULT_INITIAL_DELAY;
8 boolean fixedRate() default PollingSchedule.DEFAULT_FIXED_RATE;
9
10 }
涓嬮潰鏉ョ湅鍑犱釜渚嬪瓙錛?br /> 渚嬪瓙1:
1 @MessageEndpoint(defaultOutput="outputChannel")
2 public class Counter {
3
4 private AtomicInteger count = new AtomicInteger();
5
6 @Polled(period=3000)
7 public int getNumber() {
8 return count.incrementAndGet();
9 }
10 }
2 public class Counter {
3
4 private AtomicInteger count = new AtomicInteger();
5
6 @Polled(period=3000)
7 public int getNumber() {
8 return count.incrementAndGet();
9 }
10 }
榪欎釜渚嬪瓙鍔熻兘鏄紝MessageBus鍚姩鍚庯紝鐢盄Polled鏍囪 姣?縐掕Е鍙慻etNumber鏂規(guī)硶錛屽綋getNumber鏂規(guī)硶榪斿洖鍚庯紝
鎶婅繑鍥炲艱緗埌message.payload灞炴у悗錛屽彂閫佸埌outputChannel闃熷垪涓?br />
渚嬪瓙2:
1 @MessageEndpoint
2 public class Counter {
3
4 private AtomicInteger count = new AtomicInteger();
5
6 @Polled(period=3000)
7 public int getNumber() {
8 return count.incrementAndGet();
9 }
10
11 @Router
12 public String resolveChannel(int i) {
13 if (i % 2 == 0) {
14 return "even";
15 }
16 return "odd";
17 }
18 }
2 public class Counter {
3
4 private AtomicInteger count = new AtomicInteger();
5
6 @Polled(period=3000)
7 public int getNumber() {
8 return count.incrementAndGet();
9 }
10
11 @Router
12 public String resolveChannel(int i) {
13 if (i % 2 == 0) {
14 return "even";
15 }
16 return "odd";
17 }
18 }
榪欎釜渚嬪瓙鍔熻兘鏄紝MessageBus鍚姩鍚庯紝鐢盄Polled鏍囪 姣?縐掕Е鍙慻etNumber鏂規(guī)硶, 褰揼etNumber鏂規(guī)硶榪斿洖鍚?
鐢變簬resolveChannel鏂規(guī)硶璁劇疆浜咢Router 鏍囪瘑錛屽垯鎶婃湁getNumber鏂規(guī)硶榪斿洖鍊奸兘浼氫紶緇檙esolveChannel鏂規(guī)硶錛屾渶鍚?br /> 浼氭牴鎹柟娉曠殑榪斿洖鍊?鍗抽槦鍒楀悕縐? (@Router鏍囪鍔熻兘)錛屾妸娑堟伅鍙戝埌even闃熷垪鎴栨槸odd闃熷垪
娉細濡傛灉@MessageEndpoint綾諱腑錛屽湪鏂規(guī)硶涓婃爣璁頒簡@Router鏍囪鍚庯紝@MessageEndpoint鐨刣efaultOutput灝卞彉鎴愭棤鏁堜簡銆?/span>
@Splitter
蹇呴』涓嶡MessageEndPoint 涓璧蜂嬌鐢ㄣ?br /> 璇ュ厓鏁版嵁鏍囪瘑鐢ㄤ簬鍒嗚В娑堟伅鍐呭錛屽畠鎵鍦ㄧ殑鏂規(guī)硶鐨勮繑鍥炲煎繀欏繪槸涓涓泦鍚?collection).濡傛灉闆嗗悎鍏冪礌涓嶆槸Message綾誨瀷
浣嗗彂閫佹椂錛岃嚜鍔ㄦ妸闆嗗悎涓殑鍏冪礌瀵硅薄淇濆瓨鍒癕essage.payload灞炴у悗鍙戦併傞泦鍚堜腑鏈夊灝戜釜鍏冪礌錛屽垯浼氬彂閫佸灝戞娑堟伅銆?br />
1 @Target(ElementType.METHOD)
2 @Retention(RetentionPolicy.RUNTIME)
3 @Documented
4 @Handler
5 public @interface Splitter {
6 String channel(); //娑堟伅鍙戦佺殑闃熷垪鍚?/span>
7 }
2 @Retention(RetentionPolicy.RUNTIME)
3 @Documented
4 @Handler
5 public @interface Splitter {
6 String channel(); //娑堟伅鍙戦佺殑闃熷垪鍚?/span>
7 }
涓嬮潰涓や釜渚嬪瓙瀹炵幇鏁堟灉鏄竴鏍風殑
渚嬪瓙1
1 @MessageEndpoint(input="inputChannel")
2 public class HelloService {
3
4 @Splitter(channel="outputChannel")
5 public List<String> sayHello(String name) {
6 String s = "Hello " + name;
7 List<String> list = new ArrayList<String>();
8 list.add(s);
9 return list;
10 }
11 }
12
2 public class HelloService {
3
4 @Splitter(channel="outputChannel")
5 public List<String> sayHello(String name) {
6 String s = "Hello " + name;
7 List<String> list = new ArrayList<String>();
8 list.add(s);
9 return list;
10 }
11 }
12
渚嬪瓙2
1 @MessageEndpoint(input="inputChannel")
2 public class HelloService {
3
4 @Splitter(channel="outputChannel")
5 public List<Message> sayHello(String name) {
6 String s = "Hello " + name;
7 List<Message> list = new ArrayList<Message>();
8 Message message = new GenericMessage<String>(s);
9 list.add(message);
10 return list;
11 }
12 }
2 public class HelloService {
3
4 @Splitter(channel="outputChannel")
5 public List<Message> sayHello(String name) {
6 String s = "Hello " + name;
7 List<Message> list = new ArrayList<Message>();
8 Message message = new GenericMessage<String>(s);
9 list.add(message);
10 return list;
11 }
12 }
@Router
娑堟伅闃熷垪璺敱鍔熻兘銆?蹇呴』涓嶡MessageEndPoint 涓璧蜂嬌鐢ㄣ?br /> 瀹冩墍鍦ㄧ殑鏂規(guī)硶鐨勮繑鍥炲肩被鍨嬪繀欏繪槸MessageChannle鎴栨槸String(channel name)綾誨瀷
鍏蜂綋鐨勪緥瀛愬弬鑰冧笂闈€?br />
@Publisher
蹇呴』涓嶡MessageEndPoint 涓璧蜂嬌鐢ㄣ?br /> 璇存槑錛欯Publisher 鏍囪瘑鏄牴鎹?after-returning 鍒囬潰鐨凙OP 鍦ㄦ柟闈㈣繑鍥炲兼椂錛屽彂閫佹秷鎭埌鎸囧畾娑堟伅闃熷垪 .
涓嬮潰鐨勪緥瀛愶細璇存槑 foo鏂規(guī)硶璋冪敤鍚庯紝榪斿洖鍊間細鍙戦佸埌fooChannel娑堟伅闃熷垪
1 @Publisher(channel="fooChannel")
2 public String foo() {
3 return "bar";
4 }
2 public String foo() {
3 return "bar";
4 }
@Subscriber
蹇呴』涓嶡MessageEndPoint 涓璧蜂嬌鐢ㄣ?br /> 鎺ユ敹鎸囧畾闃熷垪鐨勬秷鎭唴瀹廣傚畠瀹炵幇鐨勫紓姝ョ殑娑堟伅鐩戝惉浜嬩歡銆?br /> 涓鏃︽湁娑堟伅鎺ユ敹鍒幫紝鍒欎細鏍規(guī)嵁message.payload 鍊間綔涓哄弬鏁幫紝鍥炶皟@Subscriber 鏍囪瘑鏍囪鐨勬柟娉?br />
1 @Subscriber(channel="fooChannel")
2 public void log(String foo) {
3 System.out.println(foo);
4 }
2 public void log(String foo) {
3 System.out.println(foo);
4 }
Good Luck!
Yours Matthew!
2008騫?鏈?4鏃?br />
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- XML elements available as of Spring 2.5(Spring2.5 xml鏍囩閰嶇疆)
- Most commonly used elements(甯哥敤鐨剎ml鏍囩浣跨敤鏂規(guī)硶)
- Namespaces錛堝懡鍚嶇┖闂?
- Guide to Spring’s rich set of annotations(Spring鏀寔鐨刟nnotations鎶鏈嬌鐢ㄦ寚鍗?
瀹樻柟涓嬭澆鍦板潃
涓嬮潰鏄畼鏂瑰彂甯冪殑鍐呭鐨勫師鏂?http://www.springframework.org/node/660
DZone has just published a reference card for Spring 2.5 Configuration. The card was written by the very knowledgeable Craig Walls and provides exhaustive details about all the XML configuration options for your Spring 2.5 contexts. It provides a handy desktop reference for any developer building Spring powered applications. XML averse developers should also check out the options in Spring 2.5 for annotation based configuration.
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