我试图在无状态EJB中使用JPQL删除实体。以下是我的代码 -
@PersistenceContext(的unitName =" MySQL的")
protected EntityManager em;
查询query = null;
@Stateless
public class Test { public void delete(){
query = em.createQuery("delete from JPAAgentInfo a WHERE a.client_id=?1 and a.agent_id=?2");
query.setParameter(1, 111);
query.setParameter(2, 1);
query.executeUpdate();
}
}
但是上面的代码会引发异常 -
javax.persistence.TransactionRequiredException:执行更新/删除查询 10:25:17,503 ERROR [io.undertow.request](默认任务-1)UT005023:对/ servlet / delete的异常处理请求:javax.persistence.TransactionRequiredException:执行更新/删除查询 在org.hibernate.jpa.spi.AbstractQueryImpl.executeUpdate(AbstractQueryImpl.java:71)[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final] 在org.jboss.as.jpa.container.QueryNonTxInvocationDetacher.executeUpdate(QueryNonTxInvocationDetacher.java:80)[wildfly-jpa-8.1.0.Final.jar:8.1.0.Final] at com.bitbyte.servlet.ChatServer.doGet(ChatServer.java:81)[classes:] 在javax.servlet.http.HttpServlet.service(HttpServlet.java:687)[jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final] 在javax.servlet.http.HttpServlet.service(HttpServlet.java:790)[jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final] at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final] at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final] at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final] at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25)[undertow-core-1.0.15.Final.jar:1.0.15.Final] at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:113)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final] at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final] at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25)[undertow-core-1.0.15.Final.jar:1.0.15.Final] at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45)[undertow-core-1.0.15.Final.jar:1.0.15.Final] at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:61)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58)[undertow-core-1.0.15.Final.jar:1.0.15.Final] at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final] at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76)[undertow-core-1.0.15.Final.jar:1.0.15.Final] at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25)[undertow-core-1.0.15.Final.jar:1.0.15.Final] 在org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25)[undertow-core-1.0.15.Final.jar:1.0.15.Final] at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25)[undertow-core-1.0.15.Final.jar:1.0.15.Final] at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:240)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final] 在io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final] at io.undertow.servlet.handlers.ServletInitialHandler.access $ 000(ServletInitialHandler.java:73)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final] 在io.undertow.servlet.handlers.ServletInitialHandler $ 1.handleRequest(ServletInitialHandler.java:146)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final] at io.undertow.server.Connectors.executeRootHandler(Connectors.java:177)[undertow-core-1.0.15.Final.jar:1.0.15.Final] at io.undertow.server.HttpServerExchange $ 1.run(HttpServerExchange.java:727)[undertow-core-1.0.15.Final.jar:1.0.15.Final] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[rt.jar:1.7.0_65] at java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:615)[rt.jar:1.7.0_65] 在java.lang.Thread.run(Thread.java:745)[rt.jar:1.7.0_65]
答案 0 :(得分:1)
它说“javax.persistence.TransactionRequiredException”。
如果没有事务,则无法运行数据库更新(仅允许查询)。
执行此操作的一种方法是使用@Transactional
注释。