堆棧內存溢出
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為什么Ebean無法識別非基本@Transient成員變量？

[英]Why is Ebean not recognising a non-primitive @Transient member variable?

 原文  2016-11-23 20:19:04  4   2    java/ persistence/ ebean/ transient

問題描述

我想從Ebean持久性中排除items 。

這是我的豆子： 

package entity;

import java.util.Date;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Transient;

import com.avaje.ebean.validation.Length;
import com.avaje.ebean.validation.NotNull;

@Entity()
@Table(name="profile")
public class Profile {

    private Item[] items;

    @Transient
    public Item[] getItems() {
        return items;
    }

    public void setItems(Item[] items) {
        this.items = items;
    }

    @Id
    private int id;

    @Length(max=50)
    @NotNull
    private String externalReference;

    ...

但是我得到以下堆棧跟蹤： 

[20:16:18] [Server thread/ERROR]: Was unable to use reflection to find a constructor and appropriate getters forimmutable type class [Lentity.Item;.  The errors while looking for the getter methods follow:
[20:16:18] [Server thread/ERROR]: Error with entity.Profile field:items
java.lang.RuntimeException: Unable to use reflection to build ImmutableMeta for class [Lentity.Item;.  Associated Errors trying to find a constructor and getter methods have been logged
        at com.avaje.ebeaninternal.server.type.reflect.ImmutableMetaFactory.createImmutableMeta(ImmutableMetaFactory.java:71) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.type.DefaultTypeManager.recursiveCreateScalarTypes(DefaultTypeManager.java:224) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.parse.DeployCreateProperties.createProp(DeployCreateProperties.java:367) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.parse.DeployCreateProperties.createProp(DeployCreateProperties.java:387) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.parse.DeployCreateProperties.createProperties(DeployCreateProperties.java:168) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.parse.DeployCreateProperties.createProperties(DeployCreateProperties.java:94) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.createDeployBeanInfo(BeanDescriptorManager.java:1041) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readEntityDeploymentInitial(BeanDescriptorManager.java:552) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.deploy(BeanDescriptorManager.java:269) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.core.InternalConfiguration.<init>(InternalConfiguration.java:143) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:209) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:63) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebean.EbeanServerFactory.create(EbeanServerFactory.java:78) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.java.JavaPlugin.init(JavaPlugin.java:344) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:104) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:67) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at profile.ProfilePlugin.<init>(ProfilePlugin.java:16) [crm-profile.jar:?]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [?:1.7.0_45]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) [?:1.7.0_45]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:1.7.0_45]
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526) [?:1.7.0_45]
        at java.lang.Class.newInstance(Class.java:374) [?:1.7.0_45]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.craftbukkit.v1_10_R1.CraftServer.loadPlugins(CraftServer.java:294) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.craftbukkit.v1_10_R1.CraftServer.reload(CraftServer.java:723) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.Bukkit.reload(Bukkit.java:548) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:625) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.PlayerConnection.handleCommand(PlayerConnection.java:1299) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1159) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(SourceFile:37) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(SourceFile:9) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_45]
        at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_45]
        at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:690) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:360) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:646) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:550) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at java.lang.Thread.run(Thread.java:744) [?:1.7.0_45]
[20:16:18] [Server thread/ERROR]: Error in deployment
javax.persistence.PersistenceException: Error with [entity.Profile] I believe it is not enhanced but it's superClass [class java.lang.Object] is? (You are not allowed to mix enhancement in a single inheritance hierarchy)
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.setBeanReflect(BeanDescriptorManager.java:1393) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.createByteCode(BeanDescriptorManager.java:1161) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readDeployAssociations(BeanDescriptorManager.java:1077) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readEntityDeploymentAssociations(BeanDescriptorManager.java:584) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.deploy(BeanDescriptorManager.java:271) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.core.InternalConfiguration.<init>(InternalConfiguration.java:143) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:209) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:63) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebean.EbeanServerFactory.create(EbeanServerFactory.java:78) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.java.JavaPlugin.init(JavaPlugin.java:344) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:104) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:67) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at profile.ProfilePlugin.<init>(ProfilePlugin.java:16) [crm-profile.jar:?]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [?:1.7.0_45]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) [?:1.7.0_45]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:1.7.0_45]
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526) [?:1.7.0_45]
        at java.lang.Class.newInstance(Class.java:374) [?:1.7.0_45]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.craftbukkit.v1_10_R1.CraftServer.loadPlugins(CraftServer.java:294) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.craftbukkit.v1_10_R1.CraftServer.reload(CraftServer.java:723) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.Bukkit.reload(Bukkit.java:548) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:625) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.PlayerConnection.handleCommand(PlayerConnection.java:1299) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1159) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(SourceFile:37) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(SourceFile:9) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_45]
        at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_45]
        at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:690) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:360) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:646) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:550) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at java.lang.Thread.run(Thread.java:744) [?:1.7.0_45]
Caused by: java.lang.IllegalArgumentException: field [items] not found in [entity.Profile$$EntityBean$crm-profile][id, externalReference, playerId, location, clan, playerClass, visible, deleted, health, level, pvpKills, pvpDeaths, mobKills, mobDeaths, onlineDuration, durationSinceLastDeath, lastUpdated, lastDeathDurationCheck]
        at com.avaje.ebeaninternal.server.reflect.EnhanceBeanReflect.getFieldIndex(EnhanceBeanReflect.java:139) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.reflect.EnhanceBeanReflect.getGetter(EnhanceBeanReflect.java:143) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.setBeanReflect(BeanDescriptorManager.java:1377) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7]
        ... 40 more

有人可以告訴我如何正確地將成員變量items聲明為@Transient以便將其從持久性中排除嗎？

2 個解決方案

解決方案1
 0  2016-11-23 20:41:00

要解決此問題，需要將@Transient批注應用於字段items （不在getItems() ），如下所示： 

@Entity()
@Table(name="profile")
public class Profile {

  @Id
  private int id;

  @Transient
  private Item[] items;

  public Item[] getItems() {
    return items;
  }

   ...
}

PS：當擁有@Transient字段時，請確保將JPA注釋一致地放置在getter方法或字段上，而不是在兩個位置上均進行分配。 在您當前的代碼中，除了@Transient之外，還為字段標記了其他JPA注釋（例如@Id ）。

它可以解決問題，但是我在JPA規范或Hibernate上找不到任何東西。

解決方案2
 0  2016-11-26 11:36:50

這是4.0.1之前的EBean版本中的錯誤。 解決方法是：

  1. 將屬性更改為列表或集合，而不是數組。

  2. 如果可能的話，也最好用“ transient”標記該字段，即，如果您不需要在該字段上使用Java序列化。

如相關錯誤報告中所述 。

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