3478245 1782366 2009-05-26T07:23:25Z http://glory.springnote.com/pages/3478245 2009-05-26T07:14:24Z <p>하이버네이트를 사용하다보면 객체를 저장할 때 생성 필드에 값이 자동으로 들어 갔으면 하는 때를 느낄 때가 있다. 예를 들면 createdAt이나 updatedAt 같은 경우이다.</p> <p>이럴 경우 하이버네이트에서 객체를 가로채서 처리하는 기능은 interceptor를 사용하면 된다.&nbsp;&nbsp; 방법은 Interceptor 인터페이스를 implements 하거나 EmptyInterceptor 클래스를</p> <p>상속받는 것이다. 다음의 그 예제이다.</p> <p>&nbsp;</p> <ol class="code"> <li>public class DateInterceptor extends EmptyInterceptor {<br /> <br /> &nbsp;&nbsp;&nbsp; private static final long serialVersionUID = 1L;<br /> <br /> &nbsp;&nbsp;&nbsp; @Override<br /> &nbsp;&nbsp;&nbsp; public boolean onSave(Object entity, Serializable id, Object[] state,<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; String[] propertyNames, Type[] types) {<br /> <br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; Date currentTimestamp = null;</li> <li>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; boolean changed = false;<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; for (int i = 0; i &lt; state.length; i++) {<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if ("createdAt".equals(propertyNames[i])) {<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; state[i] = new Date();<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; changed = true;<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; }<br /> <br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if ("updatedAt".equals(propertyNames[i])) {<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; state[i] = new Date();<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; changed = true;<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; }<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; }<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; return changed;<br /> &nbsp;&nbsp;&nbsp; }<br /> <br /> &nbsp;&nbsp;&nbsp; @Override<br /> &nbsp;&nbsp;&nbsp; public boolean onFlushDirty(Object entity, Serializable id,<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; Object[] currentState, Object[] previousState,<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; String[] propertyNames, Type[] types) {<br /> <br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; boolean changed = false;<br /> <br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; for (int i = 0; i &lt; currentState.length; i++) {<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if ("updatedAt".equals(propertyNames[i])) {<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; currentState[i] = new Date();<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; changed = true;<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; break;<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; }<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; }<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; return changed;<br /> &nbsp;&nbsp;&nbsp; }<br /> }</li> </ol> <p>&nbsp;</p> <p>&nbsp;</p> <p>스프링을 사용한다면 하이버네이트 세션 팩토리에 다음을 추가하자~~</p> <ol class="code"> <li>&nbsp;&nbsp;&nbsp; &lt;bean id="sessionFactory"&gt;<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &lt;property name="entityInterceptor"&gt;<br /> &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &lt;bean class="glory.board.model.hibernate.interceptor.DateInterceptor"/&gt;<br /> &nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &lt;/property&gt;<br /> &nbsp;&nbsp;&nbsp; &lt;/bean&gt;</li> </ol> <div style="padding: 5px; display: none; height: auto; width: auto; background-color: rgb(0, 0, 0); font-size: 13px; line-height: 1.2;">&nbsp;</div> http://yyk1981.myid.net/ http://yyk1981.myid.net/ 14 java,hibernate,interceptor