java – 使用openJPA MySQL进行运行时优化的例外
发布时间:2020-12-15 04:21:24 所属栏目:Java 来源:网络整理
导读:关于这个问题肯定有很多问题,我已经读了一些,但答案仍然没有找到答案.我是JPA的新手,我只是想测试一个简单的应用程序,看看我是否可以正确配置它.它是一个独立的应用程序,意味着它不会与Web服务器或任何东西一起运行.实体类看起来像: @Entitypublic class Pe
关于这个问题肯定有很多问题,我已经读了一些,但答案仍然没有找到答案.我是JPA的新手,我只是想测试一个简单的应用程序,看看我是否可以正确配置它.它是一个独立的应用程序,意味着它不会与Web服务器或任何东西一起运行.实体类看起来像:
@Entity public class Person{ @Id private String userID = null; @Transient private UserState userState = null; private String email = null; private String name = null; public Person(){ userID = null; email = null; name = null; userState = null; } public String getUserID() { return userID; } public void setUserID(String userID) { this.userID = userID; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public String getName() { return name; } public void setName(String name) { this.name = name; } public UserState getUserState() { return userState; } public void setUserState(UserState userState) { this.userState = userState; } } 主要的: public class PersistenceTest { public static void main(String[] args) { System.out.println("creating person"); Person p = new Person(); p.setUserID("GregR"); p.setEmail("Gregory@company.de"); p.setUserState(UserState.ACTIVE); System.out.println("done creating person GregR"); EntityManagerFactory factory = Persistence.createEntityManagerFactory(PersonService.PERSISTENCE_UNIT_NAME); System.out.println("factory initialized"); EntityManager manager = factory.createEntityManager(); System.out.println("EntityManager initialized"); PersonService service = new PersonService(manager); System.out.println("service initialized"); System.out.println("Beginning transaction"); manager.getTransaction().begin(); System.out.println("Transaction begun"); System.out.println("attempting to persist person"); service.persistEntity(p); manager.getTransaction().commit(); System.out.println("person persisted"); System.out.println("beginning cleanup"); manager.close(); factory.close(); System.out.println("Cleanup has completed"); } } 配置: <?xml version="1.0"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0"> <persistence-unit name="PersonService" transaction-type="RESOURCE_LOCAL"> <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider> <class>de.hol.persistable.entities.Person</class> <properties> <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/> <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/ConnectionWikisDB"/> <property name="javax.persistence.jdbc.user" value="GregR"/> <property name="javax.persistence.jdbc.password" value="myPassword"/> </properties> </persistence-unit> </persistence> 控制台打印输出: creating person done creating person GReeder factory initialized 47 PersonService INFO [main] openjpa.Runtime - Starting OpenJPA 2.3.0 110 PersonService INFO [main] openjpa.jdbc.JDBC - Using dictionary class "org.apache.openjpa.jdbc.sql.MySQLDictionary". 306 PersonService INFO [main] openjpa.jdbc.JDBC - Connected to MySQL version 5.5 using JDBC driver MySQL-AB JDBC Driver version mysql-connector-java-5.0.8 ( Revision: ${svn.Revision} ). Exception in thread "main" <openjpa-2.3.0-r422266:1540826 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: This configuration disallows runtime optimization,but the following listed types were not enhanced at build time or at class load time with a javaagent: " de.hol.persistable.entities.Person". at org.apache.openjpa.enhance.ManagedClassSubclasser.prepareUnenhancedClasses(ManagedClassSubclasser.java:115) at org.apache.openjpa.kernel.AbstractBrokerFactory.loadPersistentTypes(AbstractBrokerFactory.java:312) at org.apache.openjpa.kernel.AbstractBrokerFactory.initializeBroker(AbstractBrokerFactory.java:236) at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:212) at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:155) at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:226) at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:153) at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:59) at de.hol.persistable.PersistenceTest.main(PersistenceTest.java:24) 我的问题 提前谢谢了! 解决方法
我看到你有主类,因此我假设你在Java SE环境中使用它.使其工作的最简单方法是在命令行中定义-javaagent,如下所示:
java -jar myJAR.jar -javaagent:openjpa-all-2.3.0.jar 也可以从Eclipse:Run-> Run Configurations->在“Java Applications”中找到您的应用程序 – > Arguments-> VM arguments-> add -javaagent:/full/path/to/openjpa-all-2.3.0.jar (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |