Question

我尝试将de Endpoints与Cloud SQL和Hibernate集成。但是，每次都有错误。按照我的测试：

1 - 源文件夹中的persistence.xml： http://imgur.com/hKjf8Cs 给我错误： http://imgur.com/QJe8rvq

2 - resources文件夹中的persistence.xml给出了错误：

javax.persistence.PersistenceException：没有名为gegAdminPU的EntityManager的持久性提供程序在javax.persistence.Persistence.createEntityManagerFactory（Persistence.java:69）在br.com.gegsystems.gegadmin.utils.HibernateUtils。（HibernateUtils.java:47） at java.lang.Class.forName0（Native Method） at java.lang.Class.forName（Class.java:188）在com.google.appengine.tools.development.agent.runtime.RuntimeHelper.checkRestricted（RuntimeHelper.java:70）在com.google.appengine.tools.development.agent.runtime.Runtime.checkRestricted（Runtime.java:64）在br.com.gegsystems.gegadmin.endpoints.ClienteEndpoint。（ClienteEndpoint.java:20） at java.lang.Class.forName0（Native Method） at java.lang.Class.forName（Class.java:266）在com.google.api.server.spi.ServletInitializationParameters.getClassForName（ServletInitializationParameters.java:82）在com.google.api.server.spi.ServletInitializationParameters.fromServletConfig（ServletInitializationParameters.java:51）在com.google.api.server.spi.SystemServiceServlet.init（SystemServiceServlet.java:102）在org.mortbay.jetty.servlet.ServletHolder.initServlet（ServletHolder.java:440）在org.mortbay.jetty.servlet.ServletHolder.getServlet（ServletHolder.java:339）在org.mortbay.jetty.servlet.ServletHolder.handle（ServletHolder.java:487）在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1166）在com.google.appengine.api.socket.dev.DevSocketFilter.doFilter（DevSocketFilter.java:74）在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1157）在com.google.appengine.tools.development.ResponseRewriterFilter.doFilter（ResponseRewriterFilter.java:127）在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1157）在com.google.appengine.tools.development.HeaderVerificationFilter.doFilter（HeaderVerificationFilter.java:34）在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1157）在com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter（ServeBlobFilter.java:63）在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1157）在com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter（TransactionCleanupFilter.java:43）在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1157）在com.google.appengine.tools.development.StaticFileFilter.doFilter（StaticFileFilter.java:125）在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1157）在com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest（DevAppServerModulesFilter.java:366）在com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest（DevAppServerModulesFilter.java:349）在com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter（DevAppServerModulesFilter.java:116）在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1157）在org.mortbay.jetty.servlet.ServletHandler.handle（ServletHandler.java:388）在org.mortbay.jetty.security.SecurityHandler.handle（SecurityHandler.java:216）在org.mortbay.jetty.servlet.SessionHandler.handle（SessionHandler.java:182）在org.mortbay.jetty.handler.ContextHandler.handle（ContextHandler.java:765）在org.mortbay.jetty.webapp.WebAppContext.handle（WebAppContext.java:418）在com.google.appengine.tools.development.DevAppEngineWebAppContext.handle（DevAppEngineWebAppContext.java:98）在org.mortbay.jetty.handler.HandlerWrapper.handle（HandlerWrapper.java:152）在com.google.appengine.tools.development.JettyContainerService $ ApiProxyHandler.handle（JettyContainerService.java:491）在org.mortbay.jetty.handler.HandlerWrapper.handle（HandlerWrapper.java:152）在org.mortbay.jetty.Server.handle（Server.java:326）在org.mortbay.jetty.HttpConnection.handleRequest（HttpConnection.java:542）在org.mortbay.jetty.HttpConnection $ RequestHandler.content（HttpConnection.java:938）在org.mortbay.jetty.HttpParser.parseNext（HttpParser.java:755）在org.mortbay.jetty.HttpParser.parseAvailable（HttpParser.java:218）在org.mortbay.jetty.HttpConnection.handle（HttpConnection.java:404）在org.mortbay.io.nio.SelectChannelEndPoint.run（SelectChannelEndPoint.java:409）在org.mortbay.thread.QueuedThreadPool $ PoolThread.run（QueuedThreadPool.java:582）

遵循端点代码：

@Api(name="clientes", version="v1")
public class ClienteEndpoint {

    private static EntityManagerFactory entityManagerFactory;

    static {
        entityManagerFactory = HibernateUtils.getEntityManagerFactory();
    }

    @ApiMethod(name="listar", path="clientes")
    public List<String> listar(){
        List<String> resultado = new ArrayList<>();
        EntityManager em = entityManagerFactory.createEntityManager();

        em.getTransaction().begin();

        Query query = em.createQuery("SELECT 'teste' FROM dual;");
        resultado.add((String) query.getSingleResult());

        return resultado;
    }
}

HibernateUtils.java：

import com.google.appengine.api.rdbms.AppEngineDriver;
import com.google.appengine.api.utils.SystemProperty;

public class HibernateUtils {

    private static final EntityManagerFactory entityManagerFactory;

    public static EntityManagerFactory getEntityManagerFactory() {
        return entityManagerFactory;
    }

    static {
        try {
            DriverManager.registerDriver(new AppEngineDriver());
        } catch (SQLException e) {
            throw new ExceptionInInitializerError(e);
        }

        Map<String, String> properties = new HashMap<>();
        if (SystemProperty.environment.value() ==
                SystemProperty.Environment.Value.Production) {
            properties.put("javax.persistence.jdbc.driver",
                    "com.mysql.jdbc.GoogleDriver");
            properties.put("javax.persistence.jdbc.url", System.getProperty(
                    "jdbc:google:mysql://**********:*******/gegadmin?user=root")
            );
            properties.put("javax.persistence.jdbc.password",
                    System.getProperty("**********"));
        } else {
            properties.put("hibernate.connection.driver_class",
                    "com.mysql.jdbc.Driver");
            properties.put("hibernate.connection.url", System.getProperty(
                    "jdbc:mysql://localhost:3306/gegadmin?user=root")
            );
            properties.put("hibernate.connection.password",
                    System.getProperty("**********"));
        }

        entityManagerFactory = Persistence
                .createEntityManagerFactory("gegAdminPU", properties);
    }
}

Answer 1

我已经将持久性框架从Hibernate更改为EclipseLink并且正常工作。我认为这是我的Eclipse配置Hibernate和JPA的一个问题。

GAE - 使用Google Cloud SQL的Google端点

1 个答案: