GAE - 谷歌端點與Google雲端SQL

我試過將端點與雲端SQL和休眠集成在一起。但是，每次出現錯誤。按照我的測試：GAE - 谷歌端點與Google雲端SQL

1 - persistence.xml中的源文件夾： http://imgur.com/hKjf8Cs 給，我的錯誤： http://imgur.com/QJe8rvq

2 - persistence.xml中的資源文件夾給我的錯誤：

javax.persistence.PersistenceException: No Persistence provider for EntityManager named gegAdminPU at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69) at br.com.gegsystems.gegadmin.utils.HibernateUtils.(HibernateUtils.java:47) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:188) at com.google.appengine.tools.development.agent.runtime.RuntimeHelper.checkRestricted(RuntimeHelper.java:70) at com.google.appengine.tools.development.agent.runtime.Runtime.checkRestricted(Runtime.java:64) at br.com.gegsystems.gegadmin.endpoints.ClienteEndpoint.(ClienteEndpoint.java:20) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:266) at com.google.api.server.spi.ServletInitializationParameters.getClassForName(ServletInitializationParameters.java:82) at com.google.api.server.spi.ServletInitializationParameters.fromServletConfig(ServletInitializationParameters.java:51) at com.google.api.server.spi.SystemServiceServlet.init(SystemServiceServlet.java:102) at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440) at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366) at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349) at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:491) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

按照端點代碼和HibernateUtils：

@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<String>(); 
    EntityManager em = entityManagerFactory.createEntityManager(); 

    em.getTransaction().begin(); 

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

    return resultado; 
} 

} 



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); 
} 

}

來源

2015-01-05 Gabriel FAO

我有一個問題，其中System.getProperty（「whatever」）從端點堆棧調用時返回null，但它在通過servlet調用時會起作用;我不知道它是否有關，但可能值得檢查 –

感謝您的回答。我已經將持久性框架從Hibernate更改爲EclipseLink並且可以工作。我認爲這是使用Hibernate和JPA配置Eclipse的問題。 –

我已將持久性框架從Hibernate更改爲EclipseLink並正常工作。我認爲這是使用Hibernate和JPA配置Eclipse的問題。

來源

2015-02-20 16:46:33

GAE - 谷歌端點與Google雲端SQL

回答

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