我正在使用javaee开发一个api（jaxrs），并尝试实现jpa。为此，据我所知，我正在使用eclipselink，我的应用程序部署在payara服务器上。
当我尝试使用entitymanager的persist方法时，没有发生任何事情，没有错误消息或其他东西。
这是我的道课：

package shareloc.model.dao;
import javax.persistence.*;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
import java.util.List;
import java.util.Optional;
import static shareloc.ServletContextListenerImpl.createEntityManager;
public abstract class DAO<T> {
    @PersistenceContext(unitName = "MariaDB")
    protected EntityManager em;
    private Class<T> entityClass;
    public DAO(Class<T> entityClass) {
        this.entityClass = entityClass;
        this.em = getEntityManager();
    }
    private EntityManager getEntityManager() {
        if (em == null) {
            em = createEntityManager();
        }
        return em;
    }
    public T create(T entity) {
        em.persist(entity);
        return entity;
    }
    public void update(T entity) {
        em.merge(entity);
    }
    public void delete(T entity) {
        em.remove(em.merge(entity));
    }
    public Optional<T> findById(Object id) {
        return Optional.ofNullable(em.find(entityClass, id));
    }
    public List<T> findAll() {
        CriteriaBuilder cb = em.getCriteriaBuilder();
        CriteriaQuery<T> cq = cb.createQuery(entityClass);
        Root<T> root = cq.from(entityClass);
        cq.select(root);
        return em.createQuery(cq).getResultList();
    }
}

ejb用户：

package shareloc.ejb;
import javax.persistence.*;
@Entity
@Table(name = "user")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "user_id")
    private int userId;
    @Column(name = "pseudo")
    private String pseudo;
    @Column(name = "email")
    private String email;
    @Column(name = "password")
    private String password;
    @Column(name = "firstname")
    private String firstname;
    @Column(name = "lastname")
    private String lastname;
    public User() {}
    public User(String pseudo, String email, String password, String firstname, String lastname) {
        this.pseudo = pseudo;
        this.email = email;
        this.password = password;
        this.firstname = firstname;
        this.lastname = lastname;
    }
    public User(int userId, String pseudo, String email, String password, String firstname, String lastname) {
        this.userId = userId;
        this.pseudo = pseudo;
        this.email = email;
        this.password = password;
        this.firstname = firstname;
        this.lastname = lastname;
    }
    public int getUserId() {
        return userId;
    }
    public void setUserId(int userId) {
        this.userId = userId;
    }
    public String getPseudo() {
        return pseudo;
    }
    public void setPseudo(String pseudo) {
        this.pseudo = pseudo;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getFirstname() {
        return firstname;
    }
    public void setFirstname(String firstname) {
        this.firstname = firstname;
    }
    public String getLastname() {
        return lastname;
    }
    public void setLastname(String lastname) {
        this.lastname = lastname;
    }
}

调用dao create方法的方法：

public static HashMap<String, String> register(String email, String pseudo, String password, String firstname, String lastname) {
        HashMap<String, String> formError = new HashMap<>();
        formError.putAll(checkEmail(email));
        formError.putAll(checkPassword(password));
        formError.putAll(checkPseudo(pseudo));
        formError.putAll(checkFirstname(firstname));
        formError.putAll(checkLastname(lastname));
        if (formError.isEmpty()) {
            System.out.println("form error empty test");
            userDAO.create(new User(pseudo, email, password, firstname, lastname));
        }
        return formError;
    }

身份验证根目录：

@POST
    @Path("register")
    @Produces(MediaType.APPLICATION_JSON)
    public Response register(@QueryParam("email") String email, @QueryParam("pseudo") String pseudo,
                             @QueryParam("password") String password, @QueryParam("firstname") String firstname,
                             @QueryParam("lastname") String lastname) {
        HashMap<String, String> errorMsgs = AuthManager.register(email, pseudo, password, firstname, lastname);
        if (errorMsgs.isEmpty()) {
            return Response.ok().build();
        } else {
            GenericEntity<HashMap<String, String>> entity =
                    new GenericEntity<>(errorMsgs) {};
            return Response.status(Response.Status.BAD_REQUEST).entity(entity).build();
        }
    }

servletcontextlistener将创建一个用于销毁em工厂的

@WebListener
public class ServletContextListenerImpl implements ServletContextListener {
    private static EntityManagerFactory emf;
    // Application start-up
    @Override
    public void contextInitialized(ServletContextEvent sce) {
        emf = Persistence.createEntityManagerFactory("MariaDB");
    }
    // Application destroyed
    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        emf.close();
    }
    public static EntityManager createEntityManager() {
        if (emf == null)
            throw new NullPointerException("Context is not initialized yet.");
        return emf.createEntityManager();
    }
}

pom.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>fr.unistra.iutrs</groupId>
    <artifactId>ShareLoc-API</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>ShareLoc-API</name>
    <packaging>war</packaging>
    <properties>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.source>1.8</maven.compiler.source>
        <junit.version>5.6.2</junit.version>
    </properties>
    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.eclipse.persistence/org.eclipse.persistence.jpa -->
        <dependency>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>org.eclipse.persistence.jpa</artifactId>
            <version>3.0.0-M1</version>
        </dependency>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>8.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.mvc</groupId>
            <artifactId>javax.mvc-api</artifactId>
            <version>1.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.mariadb.jdbc/mariadb-java-client -->
        <dependency>
            <groupId>org.mariadb.jdbc</groupId>
            <artifactId>mariadb-java-client</artifactId>
            <version>2.7.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.3.0</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>9</source>
                    <target>9</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

持久性.xml：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd"
             version="2.2">
    <persistence-unit name="MariaDB" transaction-type="JTA">
        <jta-data-source>java:global/mariadb</jta-data-source>
        <properties>
            <property name="javax.persistence.transactionType" value="JTA"/>
            <property name="javax.persistence.jdbc.driver" value="org.mariadb.jdbc.Driver" />
            <property name="javax.persistence.jdbc.url" value="jdbc:mariadb://mysql.iutrs.unistra.fr:3306/sharelocda" />
            <property name="javax.persistence.jdbc.user" value="" />
            <property name="javax.persistence.jdbc.password" value="" />
            <property name="eclipselink.target-database" value="MySQL"/>
            <property name="eclipselink.logging.level.sql" value="FINE"/>
            <property name="eclipselink.logging.parameters" value="true"/>
        </properties>
    </persistence-unit>
</persistence>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <data-source>
        <name>java:global/mariadb</name>
        <class-name>org.mariadb.jdbc.MariaDbDataSource</class-name>
        <server-name>mysql.iutrs.unistra.fr</server-name>
        <port-number>3306</port-number>
        <database-name>sharelocda</database-name>
        <user></user>
        <password></password>
    </data-source>
    <listener>
        <listener-class>
            shareloc.ServletContextListenerImpl
        </listener-class>
    </listener>
</web-app>

这是帕亚拉的日志：

[2020-11-14T17:38:44.418+0100] [Payara 5.2020.5] [WARNING] [] [javax.enterprise.resource.resourceadapter.org.glassfish.jdbc.deployer] [tid: _ThreadID=125 _ThreadName=admin-thread-pool::admin-listener(1)] [timeMillis: 1605371924418] [levelValue: 900] [[
  Value of maxPoolSize Given, -1, was outside the bounds, default value of 32 will be used - PLEASE UPDATE YOUR VALUE]]
[2020-11-14T17:38:44.419+0100] [Payara 5.2020.5] [WARNING] [] [javax.enterprise.resource.resourceadapter.org.glassfish.jdbc.deployer] [tid: _ThreadID=125 _ThreadName=admin-thread-pool::admin-listener(1)] [timeMillis: 1605371924419] [levelValue: 900] [[
  Value of steadyPoolSize Given, -1, was outside the bounds, default value of 8 will be used - PLEASE UPDATE YOUR VALUE]]
[2020-11-14T17:38:44.499+0100] [Payara 5.2020.5] [INFO] [] [org.eclipse.persistence.session./file:/D:/Utilisateurs/razor/Documents/Etudes/IUT/IUT Robert Schuman/LP CDAD/LP1 - Développement Service Web/ShareLoc-API/target/ShareLoc-API-1.0-SNAPSHOT/WEB-INF/classes/_MariaDB] [tid: _ThreadID=125 _ThreadName=admin-thread-pool::admin-listener(1)] [timeMillis: 1605371924499] [levelValue: 800] [[
  EclipseLink, version: Eclipse Persistence Services - 2.7.7.payara-p2]]
[2020-11-14T17:38:45.791+0100] [Payara 5.2020.5] [INFO] [] [fish.payara.micro.cdi.extension.ClusteredCDIEventBusImpl] [tid: _ThreadID=125 _ThreadName=admin-thread-pool::admin-listener(1)] [timeMillis: 1605371925791] [levelValue: 800] [[
  Clustered CDI Event bus initialized]]
[2020-11-14T17:38:45.856+0100] [Payara 5.2020.5] [INFO] [] [org.glassfish.soteria.servlet.SamRegistrationInstaller] [tid: _ThreadID=125 _ThreadName=admin-thread-pool::admin-listener(1)] [timeMillis: 1605371925856] [levelValue: 800] [[
  Initializing Soteria 1.1-b01.payara-p5 for context '/ShareLoc-API-1.0-SNAPSHOT']]
[2020-11-14T17:38:45.947+0100] [Payara 5.2020.5] [INFO] [jsf.config.listener.version] [javax.enterprise.resource.webcontainer.jsf.config] [tid: _ThreadID=125 _ThreadName=admin-thread-pool::admin-listener(1)] [timeMillis: 1605371925947] [levelValue: 800] [[
  Initializing Mojarra |version.string| for context '/ShareLoc-API-1.0-SNAPSHOT']]
[2020-11-14T17:38:46.062+0100] [Payara 5.2020.5] [FINE] [] [org.eclipse.persistence.default] [tid: _ThreadID=125 _ThreadName=admin-thread-pool::admin-listener(1)] [timeMillis: 1605371926062] [levelValue: 500] [[
  SAXParserFactory instance: com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl@72289c40]]
[2020-11-14T17:38:46.114+0100] [Payara 5.2020.5] [INFO] [AS-WEB-GLUE-00172] [javax.enterprise.web] [tid: _ThreadID=125 _ThreadName=admin-thread-pool::admin-listener(1)] [timeMillis: 1605371926114] [levelValue: 800] [[
  Loading application [ShareLoc-API-1.0-SNAPSHOT] at [/ShareLoc-API-1.0-SNAPSHOT]]]
[2020-11-14T17:38:46.147+0100] [Payara 5.2020.5] [INFO] [] [javax.enterprise.system.core] [tid: _ThreadID=125 _ThreadName=admin-thread-pool::admin-listener(1)] [timeMillis: 1605371926147] [levelValue: 800] [[
  ShareLoc-API-1.0-SNAPSHOT was successfully deployed in 2 990 milliseconds.]]
[2020-11-14T17:39:01.341+0100] [Payara 5.2020.5] [FINE] [] [org.eclipse.persistence.session./file:/D:/Utilisateurs/razor/Documents/Etudes/IUT/IUT Robert Schuman/LP CDAD/LP1 - Développement Service Web/ShareLoc-API/target/ShareLoc-API-1.0-SNAPSHOT/WEB-INF/classes/_MariaDB.sql] [tid: _ThreadID=111 _ThreadName=http-thread-pool::http-listener-1(4)] [timeMillis: 1605371941341] [levelValue: 500] [[
  SELECT user_id, email, firstname, lastname, password, pseudo FROM user WHERE (email = ?)
    bind => [test@gmail.fr]]]
[2020-11-14T17:39:01.429+0100] [Payara 5.2020.5] [INFO] [] [] [tid: _ThreadID=111 _ThreadName=http-thread-pool::http-listener-1(4)] [timeMillis: 1605371941429] [levelValue: 800] [[
  form error empty test]]

所以，没有例外，没有什么可以解释我做错了什么。在询问之前，我在网上查了一下，发现有人也有同样的问题，但没有解决办法。。。
如果有人能解决我的问题，我会很高兴的(因为天哪，我在学习java之后遇到了很多问题（哈哈）如果你需要更多的信息或代码，请告诉我！谢谢！
编辑

public class AuthManager {
    private static UserDAO userDAO = new UserDAO(); // I'm calling my DAO with this.
    public static HashMap<String, String> register(String email, String pseudo, String password, String firstname, String lastname) {
        HashMap<String, String> formError = new HashMap<>();
       // Some check about the email, pseudo, etc..
        if (formError.isEmpty()) {
            System.out.println("form error empty test");
            userDAO.create(new User(pseudo, email, password, firstname, lastname)); // That the create method from the DAO wihch only do a em.persist
        }
        return formError;
    }

下面是我的userdao类：

public class UserDAO extends DAO<User> {
    public UserDAO() {
        super(User.class);
    }
    @Transactional
    public Optional<User> findByEmail(String email) {
        User user;
        Query query = em.createQuery("SELECT u FROM User u WHERE u.email = :email");
        query.setParameter("email", email);
        try {
            user = (User) query.getSingleResult();
            return Optional.of(user);
        } catch (NoResultException e) {
            return Optional.empty();
        }
    }
}

还有刀：

public abstract class DAO<T> {
    @PersistenceContext(unitName = "MariaDB")
    protected EntityManager em;
    private Class<T> entityClass;
    public DAO(Class<T> entityClass) {
        this.entityClass = entityClass;
    }
    @Transactional
    public T create(T entity) {
        em.persist(entity);
        return entity;
    }
    // + update, findAll, etc...

1条答案

按热度按时间

esbemjvw1#

我很困惑。您已经将持久性单元配置为指向由容器管理的数据源( java:global/mariadb )还配置了jdbc属性？您必须下定决心，要么使用容器提供的数据源，要么自己配置它，但不能同时使用两者（换句话说，即 jta-data-source 属性与 javax.persistence.jdbc.* 属性）。
得到这个错误是因为您将持久性单元设置为使用jta，然后您试图在某个地方使用jta开始事务 em.getTransaction() ，这是jta不允许的。还有，你把 @PersistenceContext 在…之上 entityManager ，这意味着在调用构造函数之后 entityManager 很可能被注入的示例覆盖。
解决方案是，假设您确实想要使用jta，注入 EntityManager 使用 @PersistenceContext （您不必手动初始化它），然后注解您希望以原子方式执行的方法 @Transactional ，而不是试图使用 entityManager.getTransaction() .

赞(0）回复(0）举报 2021-07-06

entitymanager.persist没有任何效果

1条答案

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